feat(ui): polish accessibility and German interface for v2.0.2

Improve the account empty state and modal ergonomics, add complete keyboard focus handling and accessible labels, localize the core upload UI, and align the product version with the v2.0.2 release.

.gitignore

@@ -6,7 +6,10 @@ __pycache__/
 electron-config.json
 electron-config.json.bak
 electron-config.json.tmp
+electron-config.json.pre-history-split.bak
 electron-config.pre-import-*.json
+electron-history.json
+electron-history.json.tmp
 *.log
 debug.log
 fileuploader.log

docs/superpowers/plans/2026-08-07-v2-account-manager-startup.md

@@ -0,0 +1,208 @@
+# V2.0.1 Account Manager und Startup Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Einen atomaren Ein-Klick-Account-Flow, einen deterministischen White-Screen-sicheren Start und eine funktionierende Update-Brücke von 3.3.108 auf die sichtbare Version 2.0.1 liefern.
+
+**Architecture:** Browserunabhängige Kernlogik kapselt Validate-then-Commit und Release-Versionsauflösung und wird vom bestehenden Renderer beziehungsweise Updater verwendet. Der Electron-Main-Prozess erzwingt Software-Rendering vor Ready und zeigt das Hauptfenster erst nach `ready-to-show`.
+
+**Tech Stack:** Electron 41, Node.js 24, `node:test`, electron-builder 26, Gitea Releases, GitHub Releases.
+
+## Global Constraints
+
+- Keine Code-Kommentare, XML-Dokumentation, TODOs oder Platzhalter hinzufügen.
+- Sichtbare Produktversion, UI, Build und öffentlicher GitHub-Tag sind exakt `2.0.1` beziehungsweise `v2.0.1`.
+- Der private Gitea-Transport-Tag für diese Version ist exakt `v3.3.109`; der Release-Titel ist exakt `Multi-Hoster-Upload v2.0.1`.
+- Fehlgeschlagene, abgebrochene, veraltete oder OTP-erfordernde Prüfungen persistieren keinen Account.
+- Release nur aus frischer Positivliste, ohne interne KI-/Task-/Log-/Backup-/Testdaten und nach Quell-, Build-, Archiv- und Secret-Prüfung.
+
+---
+
+### Task 1: Startup-Renderer absichern
+
+**Files:**
+- Create: `lib/startup-renderer.js`
+- Modify: `main.js`
+- Create: `tests/startup-renderer.test.js`
+
+**Interfaces:**
+- Produces: `configureStartupRenderer(app)` deaktiviert Hardwarebeschleunigung genau einmal vor Ready.
+- Produces: `createWindow()` erstellt das Hauptfenster unsichtbar und zeigt es auf `ready-to-show`.
+
+- [ ] **Step 1: Failing Tests schreiben**
+
+```js
+test('configureStartupRenderer disables hardware acceleration', () => {
+  let calls = 0;
+  configureStartupRenderer({ disableHardwareAcceleration() { calls++; } });
+  assert.equal(calls, 1);
+});
+```
+
+- [ ] **Step 2: RED verifizieren**
+
+Run: `node --test tests/startup-renderer.test.js`
+
+Expected: FAIL, weil `lib/startup-renderer.js` noch fehlt.
+
+- [ ] **Step 3: Minimale Implementierung schreiben**
+
+```js
+function configureStartupRenderer(app) {
+  app.disableHardwareAcceleration();
+}
+
+module.exports = { configureStartupRenderer };
+```
+
+`main.js` ruft die Funktion unmittelbar nach dem Electron-Import auf, entfernt das heuristische RDP-/Flag-Gate, setzt `show: false`, registriert `ready-to-show` vor `loadFile` und behandelt einen abgelehnten Load.
+
+- [ ] **Step 4: GREEN und Startup-Smoke verifizieren**
+
+Run: `node --test tests/startup-renderer.test.js`
+
+Run: `$env:RUN_UI_SMOKE='1'; node tests/ui-smoke.js`
+
+- [ ] **Step 5: Commit erstellen**
+
+```powershell
+git add lib/startup-renderer.js main.js tests/startup-renderer.test.js
+git commit -m "fix(startup): make renderer initialization deterministic"
+```
+
+### Task 2: Account in einem Lauf prüfen und anlegen
+
+**Files:**
+- Create: `renderer/account-submit.js`
+- Modify: `renderer/index.html`
+- Modify: `renderer/app.js`
+- Replace: `tests/validate-credentials.test.js`
+
+**Interfaces:**
+- Produces: `submitValidatedAccount({ validate, commit, isCurrent })` mit den Resultaten `committed`, `rejected`, `otp_required`, `stale` und `error`.
+- Consumes: bestehendes `window.api.validateCredentials` und `window.api.saveConfig`.
+
+- [ ] **Step 1: Failing Tests für Ein-Klick- und Fehlerpfade schreiben**
+
+```js
+test('ok validates and commits exactly once in one submission', async () => {
+  let commits = 0;
+  const result = await submitValidatedAccount({
+    validate: async () => ({ status: 'ok' }),
+    commit: async () => { commits++; },
+    isCurrent: () => true
+  });
+  assert.equal(result.status, 'committed');
+  assert.equal(commits, 1);
+});
+```
+
+Zusätzliche Tests decken `warn`, `error`, `skipped`, Throw, OTP, stale vor Commit und Save-Fehler ab.
+
+- [ ] **Step 2: RED verifizieren**
+
+Run: `node --test tests/validate-credentials.test.js`
+
+Expected: FAIL, weil `submitValidatedAccount` noch fehlt.
+
+- [ ] **Step 3: Submit-Core und Renderer-Integration implementieren**
+
+Der Submit-Core validiert, prüft `isCurrent`, committet ausschließlich `ok|warn` und gibt strukturierte Ergebnisse zurück. `saveAccount()` hält Busy bis zum Ende, vergleicht Session und Credential-Snapshot, speichert einen kopierten Kandidaten und übernimmt ihn erst nach erfolgreichem IPC. Der Button bleibt bis zum Schließen deaktiviert.
+
+- [ ] **Step 4: GREEN und UI-Vertrag verifizieren**
+
+Run: `node --test tests/validate-credentials.test.js`
+
+Run: `node --test tests/*.test.js`
+
+Run: `$env:RUN_UI_SMOKE='1'; node tests/ui-smoke.js`
+
+- [ ] **Step 5: Commit erstellen**
+
+```powershell
+git add renderer/account-submit.js renderer/index.html renderer/app.js tests/validate-credentials.test.js
+git commit -m "feat(accounts): validate and save in one action"
+```
+
+### Task 3: Produktversion und Updater-Brücke implementieren
+
+**Files:**
+- Modify: `lib/updater.js`
+- Modify: `scripts/release_gitea.mjs`
+- Modify: `package.json`
+- Modify: `package-lock.json`
+- Create: `tests/updater-version.test.js`
+
+**Interfaces:**
+- Produces: `resolveReleaseVersion(release)` liest zuerst eine semantische Version aus `release.name`, dann aus `tag_name`.
+- Produces: Release-CLI `node scripts/release_gitea.mjs 2.0.1 --transport-tag v3.3.109 <notes>`.
+
+- [ ] **Step 1: Failing Tests für Release-Auflösung und Bridge schreiben**
+
+```js
+test('bridge title resolves product version instead of transport tag', () => {
+  assert.equal(resolveReleaseVersion({ name: 'Multi-Hoster-Upload v2.0.1', tag_name: 'v3.3.109' }), '2.0.1');
+  assert.equal(isNewer('2.0.1', '2.0.1'), false);
+  assert.equal(isNewer('2.0.2', '2.0.1'), true);
+});
+```
+
+- [ ] **Step 2: RED verifizieren**
+
+Run: `node --test tests/updater-version.test.js`
+
+Expected: FAIL, weil `resolveReleaseVersion` noch fehlt.
+
+- [ ] **Step 3: Produkt-/Transport-Trennung implementieren**
+
+`checkForUpdate()` verwendet die aufgelöste Produktversion für UI und Vergleich. Der Transport-Tag bleibt im Ergebnis diagnostizierbar. Das Release-Skript validiert `--transport-tag`, baut `2.0.1`, taggt `v3.3.109`, benennt den privaten Release `Multi-Hoster-Upload v2.0.1` und erzeugt `latest.yml` mit `2.0.1`.
+
+- [ ] **Step 4: Version auf 2.0.1 setzen und GREEN verifizieren**
+
+Run: `npm version 2.0.1 --no-git-tag-version`
+
+Run: `node --test tests/updater-version.test.js`
+
+Run: `npm test`
+
+- [ ] **Step 5: Commit erstellen**
+
+```powershell
+git add lib/updater.js scripts/release_gitea.mjs package.json package-lock.json tests/updater-version.test.js
+git commit -m "feat(updater): bridge 3.3.108 clients to v2.0.1"
+```
+
+### Task 4: Build, Laufzeit und Veröffentlichung verifizieren
+
+**Files:**
+- Modify: `tasks/todo.md`
+
+**Interfaces:**
+- Consumes: Tasks 1 bis 3.
+- Produces: geprüfte private Bridge und kuratierten öffentlichen Release v2.0.1.
+
+- [ ] **Step 1: Vollständige lokale Gates ausführen**
+
+Run: `npm test`
+
+Run: `npx eslint .`
+
+Run: `npm audit --omit=dev --json`
+
+Run: `npm run release:win`
+
+- [ ] **Step 2: Build und Archive prüfen**
+
+Portable, Setup, Blockmap und `latest.yml` werden vollständig entpackt, auf Version, Struktur, Hashes, private Endpunkte, Credentials und interne Dateien geprüft. Gitleaks und TruffleHog laufen über Quell-Positivliste und entpackte Artefakte.
+
+- [ ] **Step 3: Update-Brücke isoliert testen**
+
+Ein unveränderter 3.3.108-Updater muss den privaten Transport-Tag `v3.3.109` als neuer erkennen. Der gebaute 2.0.1-Updater muss denselben Release-Titel als installiert erkennen. Setup und Portable werden separat gestartet; UI, Account-Modal und sauberer Teardown werden geprüft.
+
+- [ ] **Step 4: Private und öffentliche Releases veröffentlichen**
+
+Der private Gitea-Release nutzt Transport-Tag `v3.3.109` und Titel `Multi-Hoster-Upload v2.0.1`. Der öffentliche GitHub-Release wird aus einem neuen Positivlisten-Ordner als `v2.0.1` mit ausschließlich benötigtem Source und vier Release-Artefakten erstellt.
+
+- [ ] **Step 5: Veröffentlichte Downloads erneut verifizieren**
+
+Alle öffentlichen und privaten Assets werden neu heruntergeladen, byte- und hashverglichen, `latest.yml` wird gegen das Setup geprüft und der veröffentlichte Build wird erneut gestartet. Erst danach wird `tasks/todo.md` mit den exakten Belegen aktualisiert.

docs/superpowers/specs/2026-08-07-v2-account-manager-startup-design.md

@@ -0,0 +1,25 @@
+# V2.0.1 Account Manager und Startup
+
+## Ziel
+
+Multi-Hoster-Upload wird als sichtbare Produktversion `2.0.1` ausgeliefert. Das Hinzufügen und Bearbeiten eines Accounts validiert und speichert in einem Klick. Ein fehlgeschlagener, abgebrochener oder veralteter Check verändert weder die persistierte noch die im Renderer gehaltene Account-Konfiguration. Der intermittierende weiße Startzustand wird durch einen deterministischen Software-Renderer und ein erst nach erfolgreichem Laden sichtbares Hauptfenster verhindert.
+
+## Account-Flow
+
+Der Button lautet im Anlegefall `Prüfen und anlegen`, im Bearbeitungsfall `Prüfen und speichern`. Der bestehende Credential-Check bleibt die einzige fachliche Validierung. `ok` und `warn` führen unmittelbar zum Save, `error`, `skipped`, IPC-Fehler und `otp_required` nicht. OTP zeigt das Eingabefeld; der nächste Klick validiert und speichert in einem Lauf.
+
+Ein einziger Busy-Zustand umfasst Check und Save. Vor dem Save werden Modal-Session, Hoster, Account-ID und Credential-Snapshot erneut abgeglichen. Hoster- oder Credential-Änderung, Schließen oder erneutes Öffnen invalidieren die laufende Operation. Der Kandidat wird auf einer Kopie der Hoster-Konfiguration aufgebaut. Erst nach erfolgreichem `saveConfig` ersetzt er den Renderer-State. Bei Save-Fehler bleibt das Modal offen und der bisherige State unverändert.
+
+## Startup
+
+Die App benötigt keine GPU-beschleunigten Canvas-, WebGL- oder Video-Oberflächen. Hardwarebeschleunigung wird deshalb bei jedem Start vor `app.whenReady()` deaktiviert, unabhängig von `SESSIONNAME` und einem späteren GPU-Crash. Das Hauptfenster startet mit `show: false`, wird auf `ready-to-show` eingeblendet und wertet das Promise von `loadFile` aus. Load- und Renderer-Fehler bleiben sichtbar diagnostizierbar.
+
+## Versions- und Update-Brücke
+
+`package.json`, UI, Installer-Metadaten und öffentliche GitHub-Version lauten `2.0.1` beziehungsweise `v2.0.1`. Der ausgelieferte 3.3.108-Client vergleicht den privaten Gitea-Tag numerisch und würde einen Tag `v2.0.1` ablehnen. Außerdem existiert dort bereits ein historischer Tag `v2.0.1`.
+
+Der private Updater-Transport verwendet deshalb für diese Veröffentlichung den neuen internen Tag `v3.3.109`, während Release-Titel und Build `v2.0.1` anzeigen. Der neue Updater liest die Produktversion aus dem Release-Titel und fällt nur bei fehlender Produktversion auf den Tag zurück. Dadurch sieht 3.3.108 den höheren Transport-Tag, während 2.0.1 denselben Release anhand des Titels als bereits installiert erkennt. Künftige 2.x-Releases verwenden fortlaufende interne Transport-Tags oberhalb 3.3.108 und sichtbare 2.x-Titel.
+
+## Verifikation
+
+Regressionsfälle prüfen den real verwendeten Account-Submit-Core, die Startup-Konfiguration und die Produkt-/Transport-Versionsauflösung. Danach folgen vollständige Unit-Tests, UI-Smoke, wiederholte reale Starts, Windows-Build, entpackte Artefaktprüfung, Secret-Scans, isolierter Installer-/Updater-Test und erst anschließend die kuratierten privaten und öffentlichen Releases mit erneutem Download und Hashvergleich.

eslint.config.mjs

@@ -55,6 +55,7 @@ const nodeGlobals = {
   fetch: 'readonly',
   crypto: 'readonly',
   structuredClone: 'readonly',
+  performance: 'readonly',
 };
 
 export default [

lib/clouddrop-upload.js

@@ -105,7 +105,7 @@ class ClouddropUploader {
     let bytesRead = 0;
     async function* generate() {
       yield preambleBuf;
-      const fileStream = fs.createReadStream(filePath, { highWaterMark: 256 * 1024 });
+      const fileStream = fs.createReadStream(filePath, { highWaterMark: 1024 * 1024 });
       for await (const chunk of fileStream) {
         if (signal && signal.aborted) throw new Error('Aborted');
         if (throttle) await throttle.consume(chunk.length, signal);
@@ -159,7 +159,7 @@ class ClouddropUploader {
     // Reuse a single buffer for all chunks (only the last chunk may be smaller,
     // in which case we slice a view). Avoids 64× 16 MB allocations on a 1 GB
     // file — real GC pressure during busy uploads.
-    const fd = fs.openSync(filePath, 'r');
+    const fh = await fs.promises.open(filePath, 'r');
     let bytesSent = 0;
     const reusableBuf = Buffer.allocUnsafe(chunkSize);
     try {
@@ -169,7 +169,7 @@ class ClouddropUploader {
         const offset = i * chunkSize;
         const remaining = fileSize - offset;
         const thisChunkSize = Math.min(chunkSize, remaining);
-        fs.readSync(fd, reusableBuf, 0, thisChunkSize, offset);
+        await fh.read(reusableBuf, 0, thisChunkSize, offset);
         const body = thisChunkSize === chunkSize
           ? reusableBuf
           : reusableBuf.subarray(0, thisChunkSize);
@@ -194,7 +194,7 @@ class ClouddropUploader {
         if (progressCb) progressCb(bytesSent, fileSize);
       }
     } finally {
-      try { fs.closeSync(fd); } catch {}
+      try { await fh.close(); } catch {}
     }
 
     // 3. Complete session — all bytes are already on the server at this point.

lib/config-store.js

@@ -184,14 +184,87 @@ class ConfigStore {
       ? app.getPath('userData')
       : path.join(__dirname, '..');
     this.filePath = path.join(dir, 'electron-config.json');
+    this.historyPath = path.join(dir, 'electron-history.json');
     this._writeQueue = Promise.resolve(); // Serializes all writes to prevent race conditions
+    this._historyWriteQueue = Promise.resolve();
+    this._historyMigrated = false;
     this._cache = null;
     this._cacheKey = '';
+    this._perfLog = null;
+    this._wqDepth = 0;
 
     // Migrate config from old location if current doesn't exist
     if (!fs.existsSync(this.filePath) && app && app.isPackaged) {
       this._migrateFromOldPath(app);
     }
+    if (app && app.isPackaged) {
+      this._migrateHistory();
+    }
+  }
+
+  _readHistoryFile() {
+    try {
+      const raw = fs.readFileSync(this.historyPath, 'utf-8');
+      if (!raw || raw.trim().length < 2) return [];
+      const parsed = JSON.parse(raw);
+      if (Array.isArray(parsed)) return parsed;
+      if (parsed && Array.isArray(parsed.history)) return parsed.history;
+      return [];
+    } catch {
+      return null;
+    }
+  }
+
+  _writeHistoryFileDurable(arr) {
+    const tmp = this.historyPath + '.tmp';
+    const fd = fs.openSync(tmp, 'w');
+    try {
+      fs.writeSync(fd, JSON.stringify(arr));
+      fs.fsyncSync(fd);
+    } finally {
+      fs.closeSync(fd);
+    }
+    fs.renameSync(tmp, this.historyPath);
+  }
+
+  _writeHistoryFileAtomic(arr) {
+    return new Promise((resolve, reject) => {
+      const tmp = this.historyPath + '.tmp';
+      fs.writeFile(tmp, JSON.stringify(arr), 'utf-8', (err) => {
+        if (err) return reject(err);
+        try { fs.renameSync(tmp, this.historyPath); } catch (e) { return reject(e); }
+        resolve();
+      });
+    });
+  }
+
+  _enqueueHistoryWrite(fn) {
+    this._historyWriteQueue = this._historyWriteQueue.then(fn, fn);
+    return this._historyWriteQueue;
+  }
+
+  _migrateHistory() {
+    try {
+      if (fs.existsSync(this.historyPath)) {
+        this._historyMigrated = Array.isArray(this._readHistoryFile());
+        return;
+      }
+      let cfg = null;
+      try { cfg = this._readAndParse(this.filePath); } catch {}
+      const hist = (cfg && Array.isArray(cfg.history)) ? cfg.history : [];
+      this._writeHistoryFileDurable(hist);
+      const check = this._readHistoryFile();
+      if (Array.isArray(check) && check.length === hist.length) {
+        if (hist.length > 0) {
+          try { fs.copyFileSync(this.filePath, this.filePath + '.pre-history-split.bak'); } catch {}
+        }
+        this._historyMigrated = true;
+      } else {
+        this._historyMigrated = false;
+      }
+    } catch {
+      this._historyMigrated = false;
+    }
   }
 
   _migrateFromOldPath(app) {
@@ -228,7 +301,40 @@ class ConfigStore {
     catch { return JSON.parse(JSON.stringify(obj)); }
   }
 
+  setPerfLog(fn) { this._perfLog = typeof fn === 'function' ? fn : null; }
+
+  _pqLen(globalSettings) {
+    const pq = globalSettings && globalSettings.pendingQueue;
+    return pq && Array.isArray(pq.queueJobs) ? pq.queueJobs.length : 0;
+  }
+
+  _callerTag() {
+    const lines = (new Error().stack || '').split('\n');
+    const out = [];
+    for (let i = 2; i < lines.length && out.length < 3; i++) {
+      const line = lines[i].trim();
+      if (/config-store\.js/.test(line)) continue;
+      const m = line.match(/at (?:async )?([^ (]+)/);
+      if (m) out.push(m[1].split('.').pop());
+    }
+    return out.join('<') || '?';
+  }
+
   load() {
+    if (!this._perfLog) return this._loadImpl();
+    const hadCache = !!this._cache;
+    const t0 = performance.now();
+    const r = this._loadImpl();
+    const dt = performance.now() - t0;
+    if (dt >= 20) {
+      const q = this._pqLen(r && r.globalSettings);
+      const h = (r && r.history || []).length;
+      this._perfLog(`config-load wall=${dt.toFixed(0)}ms cache=${hadCache ? 'hit' : 'miss'} hist=${h} queue=${q} via=${this._callerTag()}`);
+    }
+    return r;
+  }
+
+  _loadImpl() {
     try {
       // In-memory cache keyed on the file's mtime+size. The processed config
       // (merged + credential-decrypted) is reparsed/re-decrypted from disk ONLY
@@ -251,8 +357,10 @@ class ConfigStore {
       try { data = this._readAndParse(this.filePath); } catch {}
       // Fallback to backup if main is empty/corrupt
       if (!data) {
-        const backupPath = this.filePath + '.bak';
-        try { data = this._readAndParse(backupPath); } catch {}
+        try { data = this._readAndParse(this.filePath + '.bak'); } catch {}
+      }
+      if (!data) {
+        try { data = this._readAndParse(this.filePath + '.pre-history-split.bak'); } catch {}
       }
       if (!data) {
         const fresh = JSON.parse(JSON.stringify(DEFAULTS));
@@ -328,7 +436,7 @@ class ConfigStore {
       const rotationCursors = (data.rotationCursors && typeof data.rotationCursors === 'object' && !Array.isArray(data.rotationCursors))
         ? data.rotationCursors
         : {};
-      const result = { hosters, hosterSettings, globalSettings, history: data.history || [], rotationCursors };
+      const result = { hosters, hosterSettings, globalSettings, history: this._historyMigrated ? [] : (data.history || []), rotationCursors };
       // Decrypt credentials stored with safeStorage so the rest of the app
       // keeps working with plaintext in memory.
       secretStore.decryptCredentials(result);
@@ -356,25 +464,68 @@ class ConfigStore {
   }
 
   _commit(config) {
-    return this._atomicWrite(this._serializeForDisk(config));
+    if (!this._perfLog) return this._atomicWrite(this._serializeForDisk(config));
+    const t0 = performance.now();
+    const data = this._serializeForDisk(config);
+    const dt = performance.now() - t0;
+    if (dt >= 20) {
+      const q = this._pqLen(config.globalSettings);
+      const h = (config.history || []).length;
+      this._perfLog(`config-serialize wall=${dt.toFixed(0)}ms bytes=${data.length} hist=${h} queue=${q} wqDepth=${this._wqDepth} via=${this._callerTag()}`);
+    }
+    return this._atomicWrite(data);
   }
 
   _enqueueWrite(fn) {
-    this._writeQueue = this._writeQueue.then(fn, fn);
+    this._wqDepth++;
+    const done = () => { this._wqDepth--; };
+    this._writeQueue = this._writeQueue.then(fn, fn).then(done, done);
     return this._writeQueue;
   }
 
+  _anyHosters(cfg) {
+    const h = cfg && cfg.hosters;
+    return !!h && typeof h === 'object' && Object.values(h).some(a => Array.isArray(a) && a.length > 0);
+  }
+
+  _recoverHostersFromDisk() {
+    for (const p of [this.filePath, this.filePath + '.bak', this.filePath + '.pre-history-split.bak']) {
+      try {
+        const raw = fs.readFileSync(p, 'utf-8');
+        if (!raw || raw.trim().length < 2) continue;
+        const data = JSON.parse(raw);
+        if (this._anyHosters(data)) return data.hosters;
+      } catch {}
+    }
+    return null;
+  }
+
+  _guardHosters(current, hostersIntentional) {
+    if (!hostersIntentional && !this._anyHosters(current)) {
+      const recovered = this._recoverHostersFromDisk();
+      if (recovered) {
+        current.hosters = recovered;
+        if (this._perfLog) this._perfLog('config-guard: prevented account wipe — restored hosters from on-disk backup after a corrupt/empty read');
+      }
+    }
+    return current;
+  }
+
   save(config) {
     return this._enqueueWrite(() => {
       const current = this.load();
       if (config.hosters) current.hosters = config.hosters;
       if (config.hosterSettings) current.hosterSettings = config.hosterSettings;
       if (config.globalSettings) current.globalSettings = config.globalSettings;
+      this._guardHosters(current, !!config.hosters);
       return this._commit(current);
     });
   }
 
   loadHistory() {
+    if (this._historyMigrated) {
+      return this._readHistoryFile() || [];
+    }
     const config = this.load();
     return config.history || [];
   }
@@ -383,18 +534,22 @@ class ConfigStore {
     return new Promise((resolve, reject) => {
       const tmpPath = this.filePath + '.tmp';
       const backupPath = this.filePath + '.bak';
-      fs.writeFile(tmpPath, data, 'utf-8', (err) => {
-        if (err) return reject(err);
+      let fd;
+      try {
+        fd = fs.openSync(tmpPath, 'w');
+        fs.writeSync(fd, data);
+        fs.fsyncSync(fd);
+      } catch (e) {
+        try { if (fd !== undefined) fs.closeSync(fd); } catch {}
+        return reject(e);
+      }
+      try { fs.closeSync(fd); } catch {}
+      Promise.resolve().then(() => {
         try {
-          // Refresh .bak from the previous live file with a raw byte copy —
-          // no read+JSON.parse+write. The live file was itself written through
-          // this atomic path, so re-validating it by parsing the whole (growing)
-          // config on every write was pure waste. Wrapped in try/catch so an
-          // AV/indexer briefly locking the file doesn't fail the save — the
-          // rename to the live path is the part that matters.
           try {
             if (fs.existsSync(this.filePath)) {
-              fs.copyFileSync(this.filePath, backupPath);
+              const cur = fs.readFileSync(this.filePath, 'utf-8');
+              if (cur && cur.trim().length > 2) fs.writeFileSync(backupPath, cur, 'utf-8');
             }
           } catch {}
           fs.renameSync(tmpPath, this.filePath);
@@ -410,6 +565,18 @@ class ConfigStore {
   }
 
   appendHistory(entry) {
+    if (this._historyMigrated) {
+      return this._enqueueHistoryWrite(() => {
+        const cur = this._readHistoryFile();
+        if (cur === null && fs.existsSync(this.historyPath)) return;
+        const arr = cur || [];
+        arr.push(entry);
+        const gs = this.load().globalSettings;
+        const retention = (gs && gs.historyRetention) || 'all';
+        const pruned = applyHistoryRetention(arr, retention, Date.now());
+        return this._writeHistoryFileAtomic(pruned);
+      });
+    }
     return this._enqueueWrite(() => {
       const config = this.load();
       config.history.push(entry);
@@ -421,6 +588,24 @@ class ConfigStore {
 
   pruneHistory(retention, opts = {}) {
     const dryRun = !!opts.dryRun;
+    if (this._historyMigrated) {
+      return this._enqueueHistoryWrite(() => {
+        const current = this._readHistoryFile() || [];
+        const beforeBatches = current.length;
+        const beforeRows = countHistoryRows(current);
+        const pruned = applyHistoryRetention(current, retention, Date.now());
+        const result = {
+          removedBatches: beforeBatches - pruned.length,
+          removedRows: beforeRows - countHistoryRows(pruned),
+          keptBatches: pruned.length,
+          keptRows: countHistoryRows(pruned)
+        };
+        if (dryRun) return result;
+        return this._writeHistoryFileAtomic(pruned)
+          .then(() => this.save({ globalSettings: { ...this.load().globalSettings, historyRetention: String(retention || 'all') } }))
+          .then(() => result);
+      });
+    }
     return this._enqueueWrite(() => {
       const config = this.load();
       const beforeBatches = config.history.length;
@@ -440,6 +625,9 @@ class ConfigStore {
   }
 
   clearHistory() {
+    if (this._historyMigrated) {
+      return this._enqueueHistoryWrite(() => this._writeHistoryFileAtomic([]));
+    }
     return this._enqueueWrite(() => {
       const config = this.load();
       config.history = [];
@@ -451,6 +639,7 @@ class ConfigStore {
     return this._enqueueWrite(() => {
       const config = this.load();
       config.rotationCursors = (cursors && typeof cursors === 'object' && !Array.isArray(cursors)) ? cursors : {};
+      this._guardHosters(config, false);
       return this._commit(config);
     });
   }

lib/diagnostics-collectors.js

@@ -11,7 +11,7 @@ const READABLE_LOGS = {
 const QUEUE_STATUSES = ['preview', 'queued', 'getting-server', 'uploading', 'retrying', 'done', 'error', 'aborted', 'skipped'];
 
 function createCollectors(deps) {
-  const { loadConfig, getAllLogPaths, support, stats, appInfo, systemInfo, agentInfo } = deps;
+  const { loadConfig, loadHistory, getAllLogPaths, support, stats, appInfo, systemInfo, agentInfo } = deps;
 
   function _secrets() {
     try { return support.collectSecretValues(loadConfig()); } catch { return []; }
@@ -205,8 +205,9 @@ function createCollectors(deps) {
 
   function getHistory(args) {
     const a = args || {};
-    const cfg = loadConfig();
-    const history = Array.isArray(cfg.history) ? cfg.history : [];
+    const history = typeof loadHistory === 'function'
+      ? (loadHistory() || [])
+      : (Array.isArray(loadConfig().history) ? loadConfig().history : []);
     const limit = Math.min(Math.max(Number(a.limit) || 20, 1), 200);
     const perHoster = stats.summarizePerHoster(history);
     const recent = [...history].slice(-limit).reverse();

lib/doodstream-upload.js

@@ -27,7 +27,11 @@ function _doodstreamLogPath() {
   return path.join(__dirname, '..', 'doodstream-debug.log');
 }
 
+let _debugVerbose = false;
+function setDebugVerbose(v) { _debugVerbose = !!v; }
+
 function _debugLog(msg) {
+  if (!_debugVerbose) return;
   try {
     const logPath = _doodstreamLogPath();
     maybeRotateLogFile(logPath, _DOODSTREAM_LOG_MAX_BYTES, _DOODSTREAM_LOG_MAX_BACKUPS);
@@ -335,7 +339,7 @@ class DoodstreamUploader {
     const epilogueBuf = Buffer.from(epilogue, 'utf-8');
     const totalSize = preambleBuf.length + fileSize + epilogueBuf.length;
 
-    const CHUNK_SIZE = 256 * 1024;
+    const CHUNK_SIZE = 1024 * 1024;
     let bytesRead = 0;
 
     async function* generate() {
@@ -698,3 +702,4 @@ class DoodstreamUploader {
 }
 
 module.exports = DoodstreamUploader;
+module.exports.setDebugVerbose = setDebugVerbose;

lib/hosters.js

@@ -288,7 +288,7 @@ function createUploadBody(filePath, formFields, onProgress, throttle, signal) {
   const { boundary, preambleBuf, epilogueBuf, totalSize, fileSize } = buildMultipart(filePath, formFields);
 
   let bytesRead = 0;
-  const CHUNK_SIZE = 256 * 1024;
+  const CHUNK_SIZE = 1024 * 1024;
 
   async function* generate() {
     yield preambleBuf;

lib/log-mode.js

@@ -1,7 +1,7 @@
 // Log-file mode resolution for fileuploader.log:
 //   - "single"  → one file:   fileuploader.log
 //   - "daily"   → per-day:    fileuploader-YYYY-MM-DD.log
-//   - "session" → per-launch: fileuploader-session-YYYY-MM-DD_HH-MM-SS-<pid>.log
+//   - "session" → per-launch: DD-MM-YYYY-mdu-session-HH-MM-NNNNNN.log
 //
 // Pure functions only — no fs, no Date.now() at call time — so they unit-test
 // cleanly and the main.js call sites pass in `new Date()` + the session stamp.
@@ -38,13 +38,11 @@
     return `${date.getFullYear()}-${_two(date.getMonth() + 1)}-${_two(date.getDate())}`;
   }
 
-  function formatSessionStamp(date, pid) {
-    const d = `${date.getFullYear()}-${_two(date.getMonth() + 1)}-${_two(date.getDate())}`;
-    const t = `${_two(date.getHours())}-${_two(date.getMinutes())}-${_two(date.getSeconds())}`;
-    // PID disambiguates a same-second close→reopen — a human can't but two
-    // automated runs might. Cheap belt to a suspenders-not-required problem.
-    const pidStr = pid !== undefined && pid !== null ? `-${pid}` : '';
-    return `${d}_${t}${pidStr}`;
+  function formatSessionStamp(date, rand) {
+    const d = `${_two(date.getDate())}-${_two(date.getMonth() + 1)}-${date.getFullYear()}`;
+    const t = `${_two(date.getHours())}-${_two(date.getMinutes())}`;
+    const r = (rand !== undefined && rand !== null && String(rand).trim()) ? `-${String(rand).trim()}` : '';
+    return `${d}-mdu-session-${t}${r}`;
   }
 
   /**
@@ -67,9 +65,10 @@
       const date = a.date instanceof Date ? a.date : new Date();
       return `${base}-${formatDateStamp(date)}${ext}`;
     }
-    // session
+    // session — the stamp is the full app-defined stem (DD-MM-YYYY-mdu-session-HH-MM),
+    // independent of baseName.
     const sid = a.sessionId && String(a.sessionId).trim();
-    if (sid) return `${base}-session-${sid}${ext}`;
+    if (sid) return `${sid}${ext}`;
     // Defensive: if a session-id wasn't passed, fall back to single rather
     // than emit a malformed name. main.js always supplies one.
     return `${base}${ext}`;
@@ -85,6 +84,9 @@
    */
   function stripModeStampFromFileName(fileName) {
     if (!fileName || typeof fileName !== 'string') return fileName;
+    const newSessionRe = /^\d{2}-\d{2}-\d{4}-mdu-session-\d{2}-\d{2}(?:-\d+)?(\.[^.]+)?$/;
+    const mNew = fileName.match(newSessionRe);
+    if (mNew) return `fileuploader${mNew[1] || ''}`;
     // Order matters: session first (longer, more specific) before daily.
     // Both regexes are anchored to $ with no nested/ambiguous quantifiers, so
     // matching is linear — the eslint security warning is precautionary.

lib/remote-server.js

@@ -21,7 +21,7 @@ class RemoteServer {
     return new Promise((resolve, reject) => {
       this._config = opts;
 
-      const wssOpts = { port: opts.port };
+      const wssOpts = { port: opts.port, maxPayload: 256 * 1024 };
       if (opts.host) wssOpts.host = opts.host;
       this._wss = new WebSocketServer(wssOpts, () => {
         resolve();
@@ -175,7 +175,9 @@ class RemoteServer {
   sendToClient(clientId, data) {
     for (const [ws, client] of this._clients) {
       if (client.id === clientId && client.authenticated) {
-        ws.send(JSON.stringify(data));
+        if (ws.readyState === 1) {
+          try { ws.send(JSON.stringify(data)); } catch {}
+        }
         break;
       }
     }

lib/startup-renderer.js

@@ -0,0 +1,19 @@
+function configureStartupRenderer(app) {
+  app.disableHardwareAcceleration();
+}
+
+function createStartupWindow(BrowserWindow, options) {
+  const window = new BrowserWindow({ ...options, show: false });
+  window.once('ready-to-show', () => {
+    window.show();
+  });
+
+  return {
+    window,
+    load(target, onLoadError) {
+      return window.loadFile(target).catch(onLoadError);
+    }
+  };
+}
+
+module.exports = { configureStartupRenderer, createStartupWindow };

lib/updater.js

@@ -37,6 +37,14 @@ function isNewer(remote, current) {
   return r.patch > c.patch;
 }
 
+function resolveReleaseVersion(release) {
+  for (const value of [release && release.name, release && release.tag_name]) {
+    const match = String(value || '').match(/(?:^|[^\d])v?(\d+\.\d+\.\d+)(?=$|[^\d.])/i);
+    if (match) return match[1];
+  }
+  return '';
+}
+
 function pickSetupAsset(assets) {
   if (!Array.isArray(assets)) return null;
   // Prefer asset with "setup" in the name (case-insensitive)
@@ -90,11 +98,12 @@ async function checkForUpdate() {
   }
 
   const release = releases[0];
-  const remoteVersion = release.tag_name || release.name || '';
+  const remoteVersion = resolveReleaseVersion(release);
+  const transportTag = release.tag_name || '';
   const currentVersion = getCurrentVersion();
 
   if (!isNewer(remoteVersion, currentVersion)) {
-    cachedCheck = { available: false, currentVersion, remoteVersion };
+    cachedCheck = { available: false, currentVersion, remoteVersion, transportTag };
     cachedCheckTs = Date.now();
     return cachedCheck;
   }
@@ -109,7 +118,8 @@ async function checkForUpdate() {
   cachedCheck = {
     available: true,
     currentVersion,
-    remoteVersion: remoteVersion.replace(/^v/i, ''),
+    remoteVersion,
+    transportTag,
     releaseUrl: release.html_url,
     assetUrl: setupAsset.browser_download_url,
     assetSize: setupAsset.size,
@@ -179,10 +189,27 @@ async function installUpdate(onProgress) {
     let downloadedBytes = 0;
     const chunks = [];
 
+    const DOWNLOAD_STALL_MS = 45000;
+    let stallTimer = null;
     const reader = res.body.getReader();
     while (true) {
       if (signal.aborted) throw new Error('Abgebrochen');
-      const { done, value } = await reader.read();
+      let chunk;
+      try {
+        chunk = await Promise.race([
+          reader.read(),
+          new Promise((_, reject) => { stallTimer = setTimeout(() => reject(new Error('__STALL__')), DOWNLOAD_STALL_MS); })
+        ]);
+      } catch (e) {
+        if (e && e.message === '__STALL__') {
+          try { activeAbort.abort(); } catch {}
+          throw new Error('Download hängt — seit 45 s keine Daten (Netzwerk/Server überlastet). Bitte laufende Uploads stoppen und erneut versuchen.');
+        }
+        throw e;
+      } finally {
+        if (stallTimer) { clearTimeout(stallTimer); stallTimer = null; }
+      }
+      const { done, value } = chunk;
       if (done) break;
       chunks.push(value);
       downloadedBytes += value.length;
@@ -263,4 +290,4 @@ function abortUpdate() {
   }
 }
 
-module.exports = { checkForUpdate, installUpdate, abortUpdate };
+module.exports = { checkForUpdate, installUpdate, abortUpdate, isNewer, resolveReleaseVersion };

lib/upload-manager.js

@@ -34,10 +34,11 @@ class UploadManager extends EventEmitter {
     this.stopAfterActive = false;
     this.statsInterval = null;
     this.startTime = 0;
-    this.activeJobs = new Map(); // uploadId -> { jobId, speedKbs, bytesUploaded }
+    this.activeJobs = new Map(); // uploadId -> { jobId, speedKbs, bytesUploaded, hoster }
     this.jobAbortControllers = new Map(); // jobId -> AbortController
     this.cancelledJobIds = new Set();
     this.sessionBytes = 0;
+    this._transientErrorTotal = 0;
     this.lastStartTime = {}; // hoster -> timestamp of last upload start
     this.intervalLocks = {}; // hoster -> Promise chain for serialized interval waits
     this.globalThrottle = null;
@@ -81,6 +82,17 @@ class UploadManager extends EventEmitter {
     return this.activeJobs.size;
   }
 
+  getDiagnostics() {
+    const activeByHoster = {};
+    for (const v of this.activeJobs.values()) {
+      const h = v && v.hoster ? v.hoster : 'unknown';
+      activeByHoster[h] = (activeByHoster[h] || 0) + 1;
+    }
+    let pending = 0;
+    for (const sem of Object.values(this.semaphores)) pending += (sem && sem.pending) || 0;
+    return { activeByHoster, transientErrors: this._transientErrorTotal, pending, active: this.activeJobs.size };
+  }
+
   clearFailedAccount(hoster, accountId) {
     return this._failedAccounts.delete(`${hoster}:${accountId}`);
   }
@@ -352,16 +364,17 @@ class UploadManager extends EventEmitter {
     for (let i = 0; i < tasks.length; i += DEDUP_CHUNK) {
       if (signal.aborted) break;
       const end = Math.min(i + DEDUP_CHUNK, tasks.length);
+      const toStat = [];
       for (let j = i; j < end; j++) {
         const task = tasks[j];
         if (!results.has(task.file)) {
-          const fileName = path.basename(task.file);
-          let size = 0;
-          try { size = fs.statSync(task.file).size; } catch {}
-          results.set(task.file, { name: fileName, size, results: [] });
+          results.set(task.file, { name: path.basename(task.file), size: 0, results: [] });
+          toStat.push(task.file);
         }
       }
-      if (end < tasks.length) await new Promise(setImmediate);
+      await Promise.all(toStat.map(async (f) => {
+        try { const st = await fs.promises.stat(f); const e = results.get(f); if (e) e.size = st.size; } catch {}
+      }));
     }
 
     this._startStatsTimer();
@@ -413,7 +426,7 @@ class UploadManager extends EventEmitter {
     if (cachedResult && typeof cachedResult.size === 'number' && cachedResult.size > 0) {
       fileSize = cachedResult.size;
     } else {
-      try { fileSize = fs.statSync(task.file).size; } catch { fileNotFound = true; }
+      try { fileSize = (await fs.promises.stat(task.file)).size; } catch { fileNotFound = true; }
     }
 
     const maxAttempts = Math.max(1, (settings.retries || 0) + 1);
@@ -625,7 +638,7 @@ class UploadManager extends EventEmitter {
           // Mutate this single object on each progress callback instead of
           // allocating a fresh one — callback fires on every stream chunk
           // (hundreds/sec per active job).
-          const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0 };
+          const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0, hoster: task.hoster };
           this.activeJobs.set(uploadId, activeEntry);
 
           let lastEmitTime = 0;
@@ -686,6 +699,7 @@ class UploadManager extends EventEmitter {
           return;
         } catch (err) {
           this.activeJobs.delete(uploadId);
+          if (this._isTransientNetworkError(err)) this._transientErrorTotal++;
 
           const isSpeedRestart = speedAbort && speedAbort.signal.aborted && !signal.aborted;
           if (!signal.aborted && !isSpeedRestart) {
@@ -938,9 +952,11 @@ class UploadManager extends EventEmitter {
             let lastBytes = 0;
             let lastSpeedTime = jobStart;
             let currentSpeedKbs = 0;
-            const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0 };
+            const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0, hoster: task.hoster };
             this.activeJobs.set(uploadId, activeEntry);
 
+            let lastEmitTime = 0;
+            const PROGRESS_EMIT_INTERVAL = 250;
             const progressCb = (bytesUploaded, bytesTotal) => {
               const now = Date.now();
               const timeDelta = (now - lastSpeedTime) / 1000;
@@ -951,6 +967,8 @@ class UploadManager extends EventEmitter {
               }
               activeEntry.speedKbs = currentSpeedKbs;
               activeEntry.bytesUploaded = bytesUploaded;
+              if (now - lastEmitTime < PROGRESS_EMIT_INTERVAL) return;
+              lastEmitTime = now;
               const elapsed = Math.round((now - jobStart) / 1000);
               const remaining = currentSpeedKbs > 0 ? Math.round((bytesTotal - bytesUploaded) / (currentSpeedKbs * 1024)) : 0;
               this._emitProgress(uploadId, fileName, task.hoster, { accountId: task.accountId,
@@ -1070,8 +1088,10 @@ class UploadManager extends EventEmitter {
       let lastBytes = 0;
       let lastSpeedTime = jobStart;
       let currentSpeedKbs = 0;
-      const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0 };
+      const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0, hoster: task.hoster };
       this.activeJobs.set(uploadId, activeEntry);
+      let lastEmitTime = 0;
+      const PROGRESS_EMIT_INTERVAL = 250;
       const progressCb = (bytesUploaded, bytesTotal) => {
         const now = Date.now();
         const timeDelta = (now - lastSpeedTime) / 1000;
@@ -1082,6 +1102,8 @@ class UploadManager extends EventEmitter {
         }
         activeEntry.speedKbs = currentSpeedKbs;
         activeEntry.bytesUploaded = bytesUploaded;
+        if (now - lastEmitTime < PROGRESS_EMIT_INTERVAL) return;
+        lastEmitTime = now;
         const elapsed = Math.round((now - jobStart) / 1000);
         const remaining = currentSpeedKbs > 0 ? Math.round((bytesTotal - bytesUploaded) / (currentSpeedKbs * 1024)) : 0;
         this._emitProgress(uploadId, fileName, task.hoster, { accountId: task.accountId,

lib/vidmoly-upload.js

@@ -187,7 +187,7 @@ class VidmolyUploader {
     const totalSize = preambleBuf.length + fileSize + epilogueBuf.length;
 
     let bytesRead = 0;
-    const CHUNK_SIZE = 256 * 1024;
+    const CHUNK_SIZE = 1024 * 1024;
 
     async function* generate() {
       yield preambleBuf;

lib/voe-upload.js

@@ -242,7 +242,7 @@ class VoeUploader {
     const totalSize = preambleBuf.length + fileSize + epilogueBuf.length;
 
     let bytesRead = 0;
-    const CHUNK_SIZE = 256 * 1024;
+    const CHUNK_SIZE = 1024 * 1024;
 
     async function* generate() {
       yield preambleBuf;

main.js

@@ -1,4 +1,8 @@
-const { app, BrowserWindow, ipcMain, dialog, clipboard, nativeTheme, Tray, Menu } = require('electron');
+process.env.UV_THREADPOOL_SIZE = process.env.UV_THREADPOOL_SIZE || '8';
+const { monitorEventLoopDelay, PerformanceObserver } = require('perf_hooks');
+const { app, BrowserWindow, ipcMain, dialog, clipboard, nativeTheme, Tray, Menu, nativeImage } = require('electron');
+const { configureStartupRenderer, createStartupWindow } = require('./lib/startup-renderer');
+configureStartupRenderer(app);
 nativeTheme.themeSource = 'dark';
 const path = require('path');
 const fs = require('fs');
@@ -25,11 +29,72 @@ const stats = require('./lib/stats');
 const { createCollectors } = require('./lib/diagnostics-collectors');
 const { createAgent } = require('./lib/diagnostics-agent');
 
+const _eventLoopDelay = monitorEventLoopDelay({ resolution: 10 });
+_eventLoopDelay.enable();
+let _eldLastLog = 0;
+let _lastCpu = process.cpuUsage();
+let _lastCpuT = Date.now();
+let _gcCount = 0;
+let _gcTotalMs = 0;
+let _gcMaxMs = 0;
+try {
+  const _gcObserver = new PerformanceObserver((list) => {
+    for (const entry of list.getEntries()) {
+      _gcCount++;
+      _gcTotalMs += entry.duration;
+      if (entry.duration > _gcMaxMs) _gcMaxMs = entry.duration;
+    }
+  });
+  _gcObserver.observe({ entryTypes: ['gc'] });
+} catch {}
+
+const _perfOn = process.env.MHU_PERF !== '0';
+let _lastIpcChannel = '';
+if (_perfOn) {
+  let _driftTick = Date.now();
+  setInterval(() => {
+    const now = Date.now();
+    const drift = now - _driftTick - 100;
+    _driftTick = now;
+    if (drift >= 100) {
+      try { logInfo(`main-longtask blocked=${drift}ms lastIpc=${_lastIpcChannel || '-'} gc=${_gcCount} gcMax=${_gcMaxMs.toFixed(0)}ms`); } catch {}
+    }
+  }, 100).unref();
+
+  const IPC_SLOW_MS = 50;
+  const _ipcLog = (m) => { try { logInfo(m); } catch {} };
+  const _rawHandle = ipcMain.handle.bind(ipcMain);
+  ipcMain.handle = (channel, fn) => _rawHandle(channel, function (evt, ...args) {
+    _lastIpcChannel = channel;
+    const t0 = performance.now();
+    let p;
+    try { p = fn.call(this, evt, ...args); }
+    catch (e) { _ipcLog(`ipc ${channel} sync-throw wall=${(performance.now() - t0).toFixed(0)}ms`); throw e; }
+    const sync = performance.now() - t0;
+    if (p && typeof p.then === 'function') {
+      return Promise.resolve(p).finally(() => {
+        const total = performance.now() - t0;
+        if (total >= IPC_SLOW_MS) _ipcLog(`ipc ${channel} wall=${total.toFixed(0)}ms sync=${sync.toFixed(0)}ms`);
+      });
+    }
+    if (sync >= IPC_SLOW_MS) _ipcLog(`ipc ${channel} wall=${sync.toFixed(0)}ms sync`);
+    return p;
+  });
+  const _rawOn = ipcMain.on.bind(ipcMain);
+  ipcMain.on = (channel, fn) => _rawOn(channel, function (evt, ...args) {
+    _lastIpcChannel = channel;
+    const t0 = performance.now();
+    try { return fn.call(this, evt, ...args); }
+    finally { const dt = performance.now() - t0; if (dt >= IPC_SLOW_MS) _ipcLog(`ipc ${channel} wall=${dt.toFixed(0)}ms sync-on`); }
+  });
+}
+
 let mainWindow;
 let _lastImportPath = null;
 let dropTargetWindow = null;
 let tray = null;
 const configStore = new ConfigStore(app);
+configStore.setPerfLog((m) => { try { logInfo(m); } catch {} });
 let uploadManager = null;
 let diagnosticAgent = null;
 let _diagHandler = null;
@@ -139,7 +204,7 @@ function debugLog(msg) {
 }
 
 let _logVerbose = false;
-function setLogVerbose(v) { _logVerbose = !!v; }
+function setLogVerbose(v) { _logVerbose = !!v; try { require('./lib/doodstream-upload').setDebugVerbose(_logVerbose); } catch {} }
 function _ctxTag(ctx) {
   if (!ctx || typeof ctx !== 'object') return '';
   const tags = [];
@@ -181,6 +246,56 @@ function logMarker(label, fields) {
   debugLog(`────── ${label}${extra} ──────`);
 }
 
+function _maybeLogEventLoopDelay(activeJobs) {
+  const now = Date.now();
+  if (now - _eldLastLog < 5000) return;
+  _eldLastLog = now;
+  try {
+    const ns = 1e6;
+    const mean = (_eventLoopDelay.mean / ns).toFixed(1);
+    const max = (_eventLoopDelay.max / ns).toFixed(1);
+    const p99 = (_eventLoopDelay.percentile(99) / ns).toFixed(1);
+    const stddev = (_eventLoopDelay.stddev / ns).toFixed(1);
+    let resStr = '';
+    try {
+      const info = process.getActiveResourcesInfo();
+      const hist = {};
+      for (const t of info) hist[t] = (hist[t] || 0) + 1;
+      const top = Object.entries(hist).sort((a, b) => b[1] - a[1]).slice(0, 6).map(([k, v]) => `${k}:${v}`).join(',');
+      resStr = ` resources=${info.length} {${top}}`;
+    } catch {}
+    let cpuStr = '';
+    try {
+      const d = process.cpuUsage(_lastCpu);
+      const wall = now - _lastCpuT;
+      const pct = wall > 0 ? Math.round((d.user + d.system) / 1000 / wall * 100) : 0;
+      const mem = process.memoryUsage();
+      const rss = Math.round(mem.rss / 1048576);
+      const heap = Math.round(mem.heapUsed / 1048576);
+      const ext = Math.round(mem.external / 1048576);
+      const ab = Math.round((mem.arrayBuffers || 0) / 1048576);
+      cpuStr = ` cpu=${pct}%core rss=${rss}MB heap=${heap}MB ext=${ext}MB ab=${ab}MB`;
+      _lastCpu = process.cpuUsage();
+      _lastCpuT = now;
+    } catch {}
+    let gcStr = '';
+    try {
+      gcStr = ` gc=${_gcCount} gcTotal=${_gcTotalMs.toFixed(0)}ms gcMax=${_gcMaxMs.toFixed(0)}ms`;
+      _gcCount = 0; _gcTotalMs = 0; _gcMaxMs = 0;
+    } catch {}
+    let upStr = '';
+    try {
+      if (uploadManager && typeof uploadManager.getDiagnostics === 'function') {
+        const d = uploadManager.getDiagnostics();
+        const byHoster = Object.entries(d.activeByHoster || {}).map(([h, c]) => `${h.replace(/\..*$/, '')}:${c}`).join(',');
+        upStr = ` active-by-hoster={${byHoster}} transient-errs=${d.transientErrors || 0} pending=${d.pending || 0}`;
+      }
+    } catch {}
+    logInfo(`eventloop-delay active=${activeJobs} mean=${mean}ms p99=${p99}ms max=${max}ms stddev=${stddev}ms threadpool=${process.env.UV_THREADPOOL_SIZE}${cpuStr}${gcStr}${resStr}${upStr}`);
+    _eventLoopDelay.reset();
+  } catch {}
+}
+
 // Dedicated account-rotation log so users can trace fallback decisions
 // without wading through general debug output. Writes to account-rotation.log
 // in the same directory as fileuploader.log (honors user's configured path).
@@ -440,10 +555,10 @@ function getBaseLogFilePath() {
 // Log-mode bookkeeping. Three modes (see lib/log-mode.js): single, daily, session.
 // The session-id is stamped ONCE at main-process startup so every write of a
 // given session lands in the same file. A close→reopen of the app starts a new
-// main process, so a new SESSION_ID, so a new session file. PID is appended as
-// a cheap hedge against same-second restart collisions.
+// main process, so a new SESSION_ID, so a new session file. A 6-digit random is
+// appended as a cheap hedge against same-minute restart collisions.
 const { resolveLogFileName, formatSessionStamp, formatDateStamp, stripModeStampFromFileName } = require('./lib/log-mode');
-const SESSION_ID = formatSessionStamp(new Date(), process.pid);
+const SESSION_ID = formatSessionStamp(new Date(), String(Math.floor(100000 + Math.random() * 900000)));
 let _activeLogKey = null;   // remembers (mode + date-or-session) so cache rolls correctly
 let _activeLogPath = null;
 
@@ -1107,7 +1222,7 @@ async function runHosterHealthCheck(config, requestedChecks) {
 }
 
 function createWindow() {
-  mainWindow = new BrowserWindow({
+  const startupWindow = createStartupWindow(BrowserWindow, {
     width: 1100,
     height: 750,
     minWidth: 800,
@@ -1120,6 +1235,7 @@ function createWindow() {
       preload: path.join(__dirname, 'preload.js')
     }
   });
+  mainWindow = startupWindow.window;
 
   mainWindow.webContents.setBackgroundThrottling(false);
 
@@ -1167,12 +1283,27 @@ function createWindow() {
     debugLog(`CHILD PROCESS GONE: type=${details.type} reason=${details.reason} exitCode=${details.exitCode}`);
   });
 
-  mainWindow.loadFile(path.join(__dirname, 'renderer', 'index.html'));
+  startupWindow.load(path.join(__dirname, 'renderer', 'index.html'), (err) => {
+    _writeCrashLog('LOAD FILE FAILED', err);
+    debugLog(`LOAD FILE FAILED: ${err && err.stack ? err.stack : err}`);
+  });
 }
 
 function createTray() {
-  const iconPath = path.join(__dirname, 'assets', 'app_icon.ico');
-  tray = new Tray(iconPath);
+  try {
+    const candidates = [
+      path.join(process.resourcesPath || __dirname, 'assets', 'app_icon.ico'),
+      path.join(__dirname, 'assets', 'app_icon.ico'),
+      path.join(__dirname, 'assets', 'icon.png')
+    ];
+    let icon = null;
+    for (const p of candidates) {
+      try {
+        const img = nativeImage.createFromPath(p);
+        if (img && !img.isEmpty()) { icon = img; break; }
+      } catch {}
+    }
+    tray = new Tray(icon || nativeImage.createEmpty());
     tray.setToolTip('Multi-Hoster-Upload');
 
     const contextMenu = Menu.buildFromTemplate([
@@ -1185,6 +1316,10 @@ function createTray() {
     tray.on('click', () => {
       if (mainWindow) { mainWindow.show(); mainWindow.focus(); }
     });
+  } catch (err) {
+    tray = null;
+    debugLog(`createTray failed (non-fatal): ${err && err.message ? err.message : err}`);
+  }
 }
 
 function updateTrayTooltip(text) {
@@ -1705,6 +1840,7 @@ ipcMain.handle('start-upload', (_event, payload) => {
       if (data.state === 'uploading' && data.activeJobs > 0) {
         const speedMb = ((Number(data.globalSpeedKbs) || 0) / 1024).toFixed(1);
         updateTrayTooltip(`Upload: ${data.activeJobs} aktiv - ${speedMb} MB/s`);
+        _maybeLogEventLoopDelay(data.activeJobs);
       } else {
         updateTrayTooltip('Multi-Hoster-Upload');
       }
@@ -2073,9 +2209,11 @@ ipcMain.handle('clear-history', async () => {
 
 // --- Backup export / import ---
 ipcMain.handle('export-backup', async () => {
+  const _bd = new Date();
+  const _bdate = `${String(_bd.getDate()).padStart(2, '0')}-${String(_bd.getMonth() + 1).padStart(2, '0')}-${_bd.getFullYear()}`;
   const { canceled, filePath } = await dialog.showSaveDialog(mainWindow, {
     title: 'Backup exportieren',
-    defaultPath: `multi-hoster-backup-${new Date().toISOString().slice(0, 10)}.mhu`,
+    defaultPath: `${_bdate}-multihoster-backup.mhu`,
     filters: [
       { name: 'Multi-Hoster Backup (verschlüsselt)', extensions: ['mhu'] },
       { name: 'Multi-Hoster Backup (Klartext JSON)', extensions: ['json'] }
@@ -2244,6 +2382,7 @@ ipcMain.handle('app:check-updates', async () => {
 });
 
 ipcMain.handle('app:install-update', () => {
+  try { if (uploadManager) uploadManager.cancel(); } catch {}
   installUpdate((progress) => {
     safeSend('app:update-progress', progress);
   }).catch((err) => {
@@ -2345,10 +2484,12 @@ ipcMain.on('save-global-settings-sync', (event, globalSettings) => {
     const _diskDiag = current.globalSettings && current.globalSettings.diagnostics;
     current.globalSettings = globalSettings;
     if (_diskDiag) current.globalSettings.diagnostics = _diskDiag;
+    try { configStore._guardHosters(current, false); } catch {}
     _invalidateLogSettings();
     const data = configStore._serializeForDisk(current);
     const backupPath = configStore.filePath + '.bak';
-    fs.writeFileSync(tmpPath, data, 'utf-8');
+    const _fd = fs.openSync(tmpPath, 'w');
+    try { fs.writeSync(_fd, data); fs.fsyncSync(_fd); } finally { fs.closeSync(_fd); }
     if (fs.existsSync(configStore.filePath)) {
       // Use try/catch around the read so an AV/lock race doesn't fail the
       // whole save just because we couldn't refresh the .bak — the write to
@@ -2486,6 +2627,7 @@ function _diagAgentInfo() {
 function _buildDiagnosticHandler() {
   const collectors = createCollectors({
     loadConfig: () => configStore.load(),
+    loadHistory: () => configStore.loadHistory(),
     getAllLogPaths,
     support: { sanitizeConfig, collectSecretValues, redactLogText, valueScrub, collectFile, REDACTED },
     stats,

package-lock.json

@@ -1,16 +1,16 @@
 {
   "name": "multi-hoster-uploader",
-  "version": "3.3.16",
+  "version": "2.0.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "multi-hoster-uploader",
-      "version": "3.3.16",
+      "version": "2.0.2",
       "dependencies": {
         "chokidar": "^3.6.0",
-        "undici": "^7.16.0",
-        "ws": "^8.19.0"
+        "undici": "^7.29.0",
+        "ws": "^8.21.0"
       },
       "devDependencies": {
         "electron": "^41.3.0",
@@ -4734,9 +4734,9 @@
       }
     },
     "node_modules/undici": {
-      "version": "7.25.0",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-7.25.0.tgz",
-      "integrity": "sha512-xXnp4kTyor2Zq+J1FfPI6Eq3ew5h6Vl0F/8d9XU5zZQf1tX9s2Su1/3PiMmUANFULpmksxkClamIZcaUqryHsQ==",
+      "version": "7.29.0",
+      "resolved": "https://registry.npmjs.org/undici/-/undici-7.29.0.tgz",
+      "integrity": "sha512-IDxfleLmmbSskfWSUATiN1nfn2rDuvnMOqb5CWR92iIfojA0Ud+ulOAAEQ57LPr9rWmsreUyf5lwyao+7GNNVw==",
       "license": "MIT",
       "engines": {
         "node": ">=20.18.1"
@@ -4844,9 +4844,9 @@
       "license": "ISC"
     },
     "node_modules/ws": {
-      "version": "8.20.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-8.20.0.tgz",
-      "integrity": "sha512-sAt8BhgNbzCtgGbt2OxmpuryO63ZoDk/sqaB/znQm94T4fCEsy/yV+7CdC1kJhOU9lboAEU7R3kquuycDoibVA==",
+      "version": "8.21.0",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-8.21.0.tgz",
+      "integrity": "sha512-Vsp28b7DRcimFQvrqu2Wek3z1iYxDCWqHYB8Qsnk/S4RfaCQzPGPyBNuVjJV3cd6UiKtUtp6sNM77gWvzcCH+g==",
       "license": "MIT",
       "engines": {
         "node": ">=10.0.0"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "multi-hoster-uploader",
-  "version": "3.3.87",
+  "version": "2.0.2",
   "description": "Upload files to doodstream, voe, vidmoly, byse simultaneously",
   "main": "main.js",
   "scripts": {
@@ -12,8 +12,8 @@
   },
   "dependencies": {
     "chokidar": "^3.6.0",
-    "undici": "^7.16.0",
-    "ws": "^8.19.0"
+    "undici": "^7.29.0",
+    "ws": "^8.21.0"
   },
   "devDependencies": {
     "electron": "^41.3.0",
@@ -33,7 +33,9 @@
       "main.js",
       "preload.js",
       "lib/**/*",
-      "renderer/**/*"
+      "renderer/**/*",
+      "assets/app_icon.ico",
+      "assets/app_icon.png"
     ],
     "win": {
       "target": [

renderer/account-submit.js

@@ -0,0 +1,73 @@
+(function (scope) {
+  function getAccountSubmitLabel({ isEdit } = {}) {
+    return isEdit ? 'Prüfen und speichern' : 'Prüfen und anlegen';
+  }
+
+  async function submitValidatedAccount({ validate, commit, afterCommit, isCurrent }) {
+    let validation;
+    try {
+      validation = await validate();
+    } catch (error) {
+      return { status: 'error', error };
+    }
+
+    try {
+      if (!isCurrent()) return { status: 'stale', validation };
+    } catch (error) {
+      return { status: 'error', error, validation };
+    }
+    if (validation && validation.status === 'otp_required') {
+      return { status: 'otp_required', validation };
+    }
+    if (!validation || (validation.status !== 'ok' && validation.status !== 'warn')) {
+      return { status: 'rejected', validation };
+    }
+
+    let value;
+    try {
+      value = await commit(validation);
+    } catch (error) {
+      return { status: 'error', error, validation };
+    }
+
+    let postCommitError;
+    if (typeof afterCommit === 'function') {
+      try {
+        await afterCommit(value, validation);
+      } catch (error) {
+        postCommitError = error;
+      }
+    }
+
+    const committedResult = { status: 'committed', committed: true, validation, value };
+    if (postCommitError) committedResult.postCommitError = postCommitError;
+    try {
+      if (!isCurrent()) return { ...committedResult, status: 'stale' };
+    } catch {
+      return { ...committedResult, status: 'stale' };
+    }
+    return committedResult;
+  }
+
+  function createAccountSubmitter() {
+    let pending = null;
+    return {
+      isBusy() {
+        return pending !== null;
+      },
+      submit(options) {
+        if (pending) return null;
+        const operation = submitValidatedAccount(options);
+        const tracked = operation.finally(() => {
+          if (pending === tracked) pending = null;
+        });
+        pending = tracked;
+        return tracked;
+      }
+    };
+  }
+
+  const accountSubmit = { createAccountSubmitter, getAccountSubmitLabel, submitValidatedAccount };
+  if (typeof module !== 'undefined' && module.exports) module.exports = accountSubmit;
+  if (scope) scope.AccountSubmit = accountSubmit;
+})(typeof window !== 'undefined' ? window : globalThis);

renderer/app.js

@@ -18,6 +18,62 @@ let config = { hosters: {}, hosterSettings: {}, globalSettings: {} };
 let hosterSettings = {};
 let uploading = false;
 let healthCheckRunning = false;
+
+let _rLongTasks = 0, _rLongTaskMax = 0, _rFrameLast = 0, _rFrameWorst = 0, _rFrameCount = 0, _rFrameJank = 0, _rPerfLastLog = 0, _rPerfWindowStart = 0;
+function _rElLabel(el) {
+  try {
+    if (!el || !el.tagName) return '?';
+    let s = el.tagName.toLowerCase();
+    if (el.id) s += '#' + el.id;
+    else if (el.className && typeof el.className === 'string') { const c = el.className.trim().split(/\s+/)[0]; if (c) s += '.' + c; }
+    const a = el.getAttribute && (el.getAttribute('data-action') || el.getAttribute('data-tab') || el.getAttribute('aria-label') || el.getAttribute('title'));
+    if (a) s += `[${String(a).slice(0, 24)}]`;
+    return s;
+  } catch { return '?'; }
+}
+try {
+  if (window.PerformanceObserver) {
+    new window.PerformanceObserver((list) => {
+      for (const e of list.getEntries()) {
+        _rLongTasks++;
+        if (e.duration > _rLongTaskMax) _rLongTaskMax = e.duration;
+        if (e.duration >= 100 && window.api && window.api.debugLog) window.api.debugLog(`renderer-longtask dur=${Math.round(e.duration)}ms`);
+      }
+    }).observe({ entryTypes: ['longtask'] });
+  }
+} catch {}
+try {
+  if (window.PerformanceObserver) {
+    new window.PerformanceObserver((list) => {
+      for (const e of list.getEntries()) {
+        const proc = Math.round((e.processingEnd || 0) - (e.processingStart || 0));
+        if (window.api && window.api.debugLog) window.api.debugLog(`renderer-interaction ${e.name} dur=${Math.round(e.duration)}ms proc=${proc}ms target=${_rElLabel(e.target)}`);
+      }
+    }).observe({ type: 'event', durationThreshold: 50, buffered: true });
+  }
+} catch {}
+function _rFrameTick(ts) {
+  if (_rFrameLast) { const d = ts - _rFrameLast; _rFrameCount++; if (d > _rFrameWorst) _rFrameWorst = d; if (d > 33) _rFrameJank++; }
+  _rFrameLast = ts;
+  requestAnimationFrame(_rFrameTick);
+}
+requestAnimationFrame(_rFrameTick);
+function _resetRendererPerf() {
+  _rPerfWindowStart = Date.now();
+  _rFrameCount = 0; _rFrameJank = 0; _rFrameWorst = 0; _rLongTasks = 0; _rLongTaskMax = 0;
+}
+function _maybeLogRendererPerf(activeJobs) {
+  const now = Date.now();
+  if (!_rPerfWindowStart) _rPerfWindowStart = now;
+  if (now - _rPerfLastLog < 5000) return;
+  const winSec = (now - _rPerfWindowStart) / 1000;
+  const fps = winSec > 0 ? Math.round(_rFrameCount / winSec) : 0;
+  if (window.api && window.api.debugLog) {
+    window.api.debugLog(`renderer-perf active=${activeJobs} fps=${fps} jankFrames=${_rFrameJank} worstFrame=${Math.round(_rFrameWorst)}ms longtasks=${_rLongTasks} maxTask=${Math.round(_rLongTaskMax)}ms`);
+  }
+  _rPerfLastLog = now;
+  _resetRendererPerf();
+}
 let accountStatuses = {}; // { accountId: { status: 'ok'|'warn'|'error'|'checking'|'unchecked', message: '' } }
 let editingAccountId = null; // null = adding, string = editing account by ID
 let autoHealthCheckEnabled = true;
@@ -276,6 +332,7 @@ async function init() {
 
 // --- Tab switching ---
 let _historyDirty = false;
+let _historyEverLoaded = false;
 function _isHistoryTabActive() {
   const tab = document.querySelector('.tab.active');
   return !!(tab && tab.dataset.view === 'history');
@@ -296,15 +353,18 @@ function _isHistoryTabActive() {
     if (!tab || tab === activeTab) return;
     if (activeTab) {
       activeTab.classList.remove('active');
+      activeTab.setAttribute('aria-selected', 'false');
+      activeTab.tabIndex = -1;
       const prevView = viewsById[`${activeTab.dataset.view}-view`];
       if (prevView) prevView.classList.remove('active');
     }
     tab.classList.add('active');
+    tab.setAttribute('aria-selected', 'true');
+    tab.tabIndex = 0;
     const nextView = viewsById[`${tab.dataset.view}-view`];
     if (nextView) nextView.classList.add('active');
     activeTab = tab;
-    if (tab.dataset.view === 'history') {
-      _historyDirty = false;
+    if (tab.dataset.view === 'history' && (_historyDirty || !_historyEverLoaded)) {
       loadHistory();
     }
   };
@@ -312,6 +372,18 @@ function _isHistoryTabActive() {
   const tabBar = tabs[0] && tabs[0].parentElement;
   if (tabBar) {
     tabBar.addEventListener('click', (e) => handle(e.target));
+    tabBar.addEventListener('keydown', (e) => {
+      if (!['ArrowLeft', 'ArrowRight', 'Home', 'End'].includes(e.key)) return;
+      e.preventDefault();
+      const current = Math.max(0, tabs.indexOf(activeTab));
+      const next = e.key === 'Home'
+        ? 0
+        : e.key === 'End'
+          ? tabs.length - 1
+          : (current + (e.key === 'ArrowRight' ? 1 : -1) + tabs.length) % tabs.length;
+      tabs[next].focus();
+      handle(tabs[next]);
+    });
   } else {
     // Fallback: bind per-tab if somehow no common parent
     tabs.forEach(t => t.addEventListener('click', () => handle(t)));
@@ -1864,9 +1936,20 @@ document.addEventListener('click', (e) => {
   if (!e.target.closest('.context-menu')) hideContextMenu();
 });
 document.addEventListener('keydown', (e) => {
+  const accountModal = document.getElementById('accountModal');
+  if (e.key === 'Tab' && accountModal && accountModal.style.display !== 'none') {
+    const focusable = Array.from(accountModal.querySelectorAll('button:not([disabled]), input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])'));
+    const first = focusable[0];
+    const last = focusable[focusable.length - 1];
+    if (first && last && ((!e.shiftKey && document.activeElement === last) || (e.shiftKey && document.activeElement === first))) {
+      e.preventDefault();
+      (e.shiftKey ? last : first).focus();
+    }
+  }
   if (e.key === 'Escape') {
     hideContextMenu();
     cancelHosterModal();
+    if (accountModal && accountModal.style.display !== 'none') closeAccountModal();
   }
   if (e.target.closest('input, textarea, select')) return;
   const activeView = document.querySelector('.view.active');
@@ -2539,6 +2622,12 @@ function _handleStatsImpl(data) {
   updateStatusBar();
   updateStatsPanel();
 
+  if (data.state === 'uploading' && (data.activeJobs || 0) > 0) {
+    _maybeLogRendererPerf(data.activeJobs);
+  } else {
+    _resetRendererPerf();
+  }
+
   // Track run time
   if (data.state === 'uploading' || data.state === 'stopping') {
     if (!statsStartTime) {
@@ -2750,13 +2839,13 @@ const SESSION_FILES_CAP = 2000;
 function maybeAddSessionFile(job) {
   if (!job) return;
 
-  const dt = formatDateTime(new Date());
   if (job.status === 'done' && job.result) {
     const link = job.result.download_url || job.result.embed_url || '';
     if (!link) return;
     const dedupKey = `${link}\u0001${job.fileName}\u0001${job.hoster}`;
     if (!_sessionFileKeys.has(dedupKey)) {
       _sessionFileKeys.add(dedupKey);
+      const dt = formatDateTime(new Date());
       sessionFilesData.push({
         date: dt.text,
         dateTs: dt.ts,
@@ -2889,12 +2978,12 @@ function updateStatusBar() {
   const totalSize = Math.max(stats.totalSize, _sessionTotalBytes);
   document.getElementById('sbTotal').textContent = `${formatSize(uploadedSize)} / ${formatSize(totalSize)}`;
   document.getElementById('sbEta').textContent = `ETA ${etaSeconds > 0 ? formatTime(etaSeconds) : '--:--'}`;
-  document.getElementById('sbConnections').textContent = `Connections: ${lastUploadStats.activeJobs || 0}`;
-  document.getElementById('sbQueueCount').textContent = `Total: ${stats.total}`;
-  document.getElementById('sbRemainingCount').textContent = `Remaining: ${stats.remaining}`;
-  document.getElementById('sbInProgressCount').textContent = `In Progress: ${stats.inProgress}`;
-  document.getElementById('sbDoneCount').textContent = `Done: ${_sessionDoneCount}`;
-  document.getElementById('sbErrorCount').textContent = `Error: ${_sessionErrorCount}`;
+  document.getElementById('sbConnections').textContent = `Verbindungen ${lastUploadStats.activeJobs || 0}`;
+  document.getElementById('sbQueueCount').textContent = `Gesamt ${stats.total}`;
+  document.getElementById('sbRemainingCount').textContent = `Verbleibend ${stats.remaining}`;
+  document.getElementById('sbInProgressCount').textContent = `Läuft ${stats.inProgress}`;
+  document.getElementById('sbDoneCount').textContent = `Fertig ${_sessionDoneCount}`;
+  document.getElementById('sbErrorCount').textContent = `Fehler ${_sessionErrorCount}`;
 }
 
 // --- Health Check ---
@@ -3802,8 +3891,10 @@ function renderAccounts() {
   if (allAccounts.length === 0) {
     container.innerHTML = `
       <div class="accounts-empty">
-        <p>Keine Accounts vorhanden</p>
-        <span class="hint">Klicke auf "Account hinzufügen", um einen Hoster einzurichten.</span>
+        <div class="accounts-empty-icon" aria-hidden="true">+</div>
+        <h3>Noch keine Accounts</h3>
+        <p>Füge deinen ersten Hoster-Account hinzu. Die Zugangsdaten werden vor dem Speichern geprüft.</p>
+        <button class="btn btn-primary" type="button" data-account-empty-add>Ersten Account hinzufügen</button>
       </div>`;
     if (footer) footer.style.display = 'none';
     if (!_accountListenersBound) bindAccountListeners(container);
@@ -4044,6 +4135,7 @@ function bindAccountListeners(container) {
     }
     const btn = e.target.closest('button');
     if (!btn) return;
+    if (btn.hasAttribute('data-account-empty-add')) return openAccountModal(null);
     if (btn.dataset.accountToggle) return toggleAccount(btn.dataset.accountToggle);
     if (btn.dataset.accountEdit) return openAccountModal(btn.dataset.accountEdit);
     if (btn.dataset.accountDelete) return openDeleteAccountModal(btn.dataset.accountDelete);
@@ -4178,28 +4270,43 @@ function getCredsFieldsHtml(authType, account, hoster) {
     };
     return `
       <div class="settings-row">
-        <label>${escapeHtml(fld.label)}</label>
-        <input type="${fld.inputType}" class="key-input" id="accField_username" value="${escapeAttr(account.username || '')}" placeholder="${escapeAttr(fld.placeholder)}">
+        <label for="accField_username">${escapeHtml(fld.label)}</label>
+        <input type="${fld.inputType}" class="key-input" id="accField_username" name="username" autocomplete="username" spellcheck="false" value="${escapeAttr(account.username || '')}" placeholder="${escapeAttr(fld.placeholder)}">
       </div>
       <div class="settings-row">
-        <label>Passwort</label>
-        <input type="password" class="key-input" id="accField_password" value="${escapeAttr(account.password || '')}" placeholder="Passwort">
-        <button class="toggle-vis" type="button" title="Anzeigen">&#128065;</button>
+        <label for="accField_password">Passwort</label>
+        <input type="password" class="key-input" id="accField_password" name="password" autocomplete="current-password" value="${escapeAttr(account.password || '')}" placeholder="Passwort">
+        <button class="toggle-vis" type="button" title="Passwort anzeigen" aria-label="Passwort anzeigen" aria-pressed="false">&#128065;</button>
       </div>`;
   }
   // API key
   return `
     <div class="settings-row">
-      <label>API Key</label>
-      <input type="password" class="key-input" id="accField_apiKey" value="${escapeAttr(account.apiKey || '')}" placeholder="API Key">
-      <button class="toggle-vis" type="button" title="Anzeigen">&#128065;</button>
+      <label for="accField_apiKey">API-Key</label>
+      <input type="password" class="key-input" id="accField_apiKey" name="apiKey" autocomplete="off" spellcheck="false" value="${escapeAttr(account.apiKey || '')}" placeholder="API-Key">
+      <button class="toggle-vis" type="button" title="API-Key anzeigen" aria-label="API-Key anzeigen" aria-pressed="false">&#128065;</button>
     </div>`;
 }
 
+function wireCredentialVisibilityButtons(container) {
+  container.querySelectorAll('.toggle-vis').forEach(btn => {
+    btn.addEventListener('click', () => {
+      const input = btn.previousElementSibling;
+      const visible = input.type === 'password';
+      const fieldName = input.id === 'accField_apiKey' ? 'API-Key' : 'Passwort';
+      input.type = visible ? 'text' : 'password';
+      btn.setAttribute('aria-pressed', String(visible));
+      btn.setAttribute('aria-label', `${fieldName} ${visible ? 'verbergen' : 'anzeigen'}`);
+      btn.title = `${fieldName} ${visible ? 'verbergen' : 'anzeigen'}`;
+    });
+  });
+}
+
+let _accountModalReturnFocus = null;
+
 function openAccountModal(editAccountId) {
+  _accountModalReturnFocus = document.activeElement instanceof HTMLElement ? document.activeElement : null;
   editingAccountId = editAccountId || null;
-  // Reset the two-step state — any previously validated snapshot from a prior
-  // modal session is stale and must not allow a no-recheck commit.
   _resetAccountModalState();
   const modal = document.getElementById('accountModal');
   const title = document.getElementById('accountModalTitle');
@@ -4219,17 +4326,17 @@ function openAccountModal(editAccountId) {
     const found = findAccountById(editingAccountId);
     if (!found) return;
     title.textContent = 'Account bearbeiten';
-    subtitle.textContent = `Zugangsdaten für ${getAccountDisplayName(found.name, found.account)} bearbeiten.`;
+    subtitle.textContent = `Zugangsdaten für ${getAccountDisplayName(found.name, found.account)} bearbeiten und prüfen.`;
     hosterRow.style.display = 'none';
-    saveBtn.textContent = 'Prüfen';
+    saveBtn.textContent = window.AccountSubmit.getAccountSubmitLabel({ isEdit: true });
     if (labelInput) labelInput.value = found.account.label || '';
     credsContainer.innerHTML = getCredsFieldsHtml(found.account.authType || 'login', found.account, found.name);
   } else {
     // Add mode — always show all options (multiple accounts per hoster allowed)
     title.textContent = 'Account hinzufügen';
-    subtitle.textContent = 'Wähle einen Hoster und gib deine Zugangsdaten ein. Erst „Prüfen" klicken; nach grünem Login wird daraus „Anlegen".';
+    subtitle.textContent = 'Wähle einen Hoster und gib deine Zugangsdaten ein. Der Account wird vor dem Anlegen geprüft.';
     hosterRow.style.display = 'flex';
-    saveBtn.textContent = 'Prüfen';
+    saveBtn.textContent = window.AccountSubmit.getAccountSubmitLabel({ isEdit: false });
     hosterSelect.innerHTML = HOSTER_ADD_OPTIONS.map(opt =>
       `<option value="${opt.value}">${escapeHtml(opt.label)}</option>`
     ).join('');
@@ -4238,32 +4345,30 @@ function openAccountModal(editAccountId) {
     credsContainer.innerHTML = getCredsFieldsHtml(firstOpt.authType, {}, firstOpt.value);
   }
 
-  // Toggle visibility buttons
-  credsContainer.querySelectorAll('.toggle-vis').forEach(btn => {
-    btn.addEventListener('click', () => {
-      const input = btn.previousElementSibling;
-      input.type = input.type === 'password' ? 'text' : 'password';
-    });
-  });
+  wireCredentialVisibilityButtons(credsContainer);
 
-  // Wire field invalidation: any change to a cred field after a green check
-  // drops the validated snapshot so the next click is a re-check, not a commit
-  // of unverified creds. Re-wired here every open because credsContainer's HTML
-  // was replaced.
   _wireCredFieldInvalidation();
 
   modal.style.display = 'flex';
+  requestAnimationFrame(() => {
+    const firstControl = editingAccountId
+      ? document.getElementById('accField_label')
+      : hosterSelect;
+    if (firstControl) firstControl.focus();
+  });
 }
 
 function closeAccountModal() {
   document.getElementById('accountModal').style.display = 'none';
   _hideOtpField();
   editingAccountId = null;
-  // Cancel any pending auto-close so a stale timer can't close a future modal
-  // the user reopens within the auto-close window.
-  if (_autoCloseTimer) { clearTimeout(_autoCloseTimer); _autoCloseTimer = null; }
-  _validatedCreds = null;
-  _accountModalBusy = false;
+  _resetAccountModalState();
+  const returnFocus = _accountModalReturnFocus;
+  _accountModalReturnFocus = null;
+  const focusTarget = returnFocus && returnFocus.isConnected
+    ? returnFocus
+    : document.getElementById('addAccountBtn');
+  if (focusTarget) focusTarget.focus();
 }
 
 function openDeleteAccountModal(accountId) {
@@ -4319,66 +4424,54 @@ function readAccountCredsFromModal(authType) {
   return { enabled: !!apiKey, authType: 'api', apiKey, label };
 }
 
-// --- Two-step account-modal state machine ---
-//
-// Goal: never persist invalid/unverified credentials to config.hosters. The
-// user clicks "Prüfen" → ephemeral validate-credentials IPC runs → on green
-// the button label flips to "Anlegen" / "Speichern" → the next click commits
-// to config. Editing any cred field between the two clicks drops the validated
-// snapshot so the user can't sneak unverified creds through by editing
-// post-green.
-//
-// Invariants enforced here:
-//  1. Nothing reaches config.hosters until _validatedCreds matches a green
-//     result for the currently-typed creds.
-//  2. _accountModalBusy is set SYNCHRONOUSLY at the top of the click handler
-//     before any await — guards against double-clicks producing duplicates.
-//  3. OTP retry stays ephemeral: each retry re-runs validate-credentials with
-//     the new OTP, no config writes until green.
-//  4. Edit mode hits the same path → bad edits never overwrite known-good
-//     creds on disk.
-let _accountModalBusy = false;
-let _validatedCreds = null; // { hosterName, authType, snapshot, status } when green
+const _accountSubmitter = window.AccountSubmit.createAccountSubmitter();
+let _accountModalCommitLocked = false;
 let _autoCloseTimer = null;
-// Session token used to ignore stale validate-credentials responses: if the
-// user closes the modal mid-flight and reopens it, the late .then must NOT
-// stomp the new session's state. Bumped on every modal reset.
 let _accountModalSession = 0;
 
 function _resetAccountModalState() {
-  _accountModalBusy = false;
-  _validatedCreds = null;
   _accountModalSession++;
+  _accountModalCommitLocked = false;
   if (_autoCloseTimer) { clearTimeout(_autoCloseTimer); _autoCloseTimer = null; }
+  _syncAccountSubmitButton();
 }
 
 function _credsSnapshotKey(authType, creds) {
-  // Identity key for the typed creds — used to detect post-validation edits.
-  // Label changes do NOT invalidate (label is metadata, not a credential).
   if (authType === 'login') return `login:${creds.username || ''}:${creds.password || ''}`;
   return `api:${creds.apiKey || ''}`;
 }
 
+function _defaultAccountSubmitButtonText(ctx) {
+  return window.AccountSubmit.getAccountSubmitLabel({ isEdit: !!(ctx && ctx.isEdit) });
+}
+
+function _syncAccountSubmitButton() {
+  const saveBtn = document.getElementById('saveAccountBtn');
+  if (!saveBtn) return;
+  saveBtn.textContent = _defaultAccountSubmitButtonText(_determineHosterContext());
+  saveBtn.disabled = _accountSubmitter.isBusy() || _accountModalCommitLocked;
+}
+
+function _invalidateAccountSubmit() {
+  _accountModalSession++;
+  const statusEl = document.getElementById('accountModalStatus');
+  if (statusEl) {
+    statusEl.textContent = '';
+    statusEl.className = 'account-modal-status';
+  }
+  const saveBtn = document.getElementById('saveAccountBtn');
+  if (saveBtn && !_accountSubmitter.isBusy() && !_accountModalCommitLocked) {
+    saveBtn.disabled = false;
+    saveBtn.textContent = _defaultAccountSubmitButtonText(_determineHosterContext());
+  }
+}
+
 function _wireCredFieldInvalidation() {
-  // Any change to a cred IDENTITY field (username/password/apiKey) clears the
-  // validated snapshot and reverts the button to "Prüfen". Label edits don't
-  // invalidate (label is metadata, not a credential). OTP edits don't either:
-  // OTP is an ephemeral auth challenge — once doodstream returned "ok" for
-  // these username+password+OTP, the resulting trust is on the creds; the user
-  // clearing or fixing the OTP field afterward shouldn't force a re-prompt.
   const ids = ['accField_username', 'accField_password', 'accField_apiKey'];
   for (const id of ids) {
     const el = document.getElementById(id);
     if (!el || el.dataset.invalidateBound === '1') continue;
-    el.addEventListener('input', () => {
-      if (_validatedCreds) {
-        _validatedCreds = null;
-        const saveBtn = document.getElementById('saveAccountBtn');
-        if (saveBtn) saveBtn.textContent = 'Prüfen';
-        const statusEl = document.getElementById('accountModalStatus');
-        if (statusEl) { statusEl.textContent = ''; statusEl.className = 'account-modal-status'; }
-      }
-    });
+    el.addEventListener('input', _invalidateAccountSubmit);
     el.dataset.invalidateBound = '1';
   }
 }
@@ -4396,12 +4489,18 @@ function _determineHosterContext() {
   return { hosterName: opt.hoster, authType: opt.authType, accountId: null, isEdit: false };
 }
 
+function _isAccountSubmitCurrent(session, ctx, snapshotKey) {
+  if (session !== _accountModalSession) return false;
+  const currentCtx = _determineHosterContext();
+  if (!currentCtx) return false;
+  if (currentCtx.hosterName !== ctx.hosterName || currentCtx.authType !== ctx.authType) return false;
+  if (currentCtx.accountId !== ctx.accountId || currentCtx.isEdit !== ctx.isEdit) return false;
+  const currentCreds = readAccountCredsFromModal(currentCtx.authType);
+  return _credsSnapshotKey(currentCtx.authType, currentCreds) === snapshotKey;
+}
+
 async function saveAccount() {
-  // SYNCHRONOUS re-entry guard — must come before any await. Without this a
-  // double-click before the first IPC returns triggers two saveAccount() calls
-  // and (in the old code) two pushes/two IPCs. _accountModalBusy is checked
-  // synchronously and set synchronously, so the second click no-ops cleanly.
-  if (_accountModalBusy) return;
+  if (_accountSubmitter.isBusy() || _accountModalCommitLocked) return;
 
   const ctx = _determineHosterContext();
   if (!ctx) return;
@@ -4414,37 +4513,8 @@ async function saveAccount() {
     return;
   }
 
-  // STEP 2: commit. Only fires if a previous "Prüfen" already validated the
-  // EXACT same creds (label changes don't break this — label isn't part of the
-  // credential identity).
   const snapshotKey = _credsSnapshotKey(ctx.authType, creds);
-  if (_validatedCreds &&
-      _validatedCreds.hosterName === ctx.hosterName &&
-      _validatedCreds.authType === ctx.authType &&
-      _validatedCreds.snapshot === snapshotKey) {
-    // Set busy INSIDE the try so a sync throw on the saveBtn deref above can't
-    // leak _accountModalBusy=true and lock the user out for the session.
-    try {
-      _accountModalBusy = true;
-      saveBtn.disabled = true;
-      saveBtn.textContent = ctx.isEdit ? 'Speichere…' : 'Lege an…';
-      await _commitAccount(ctx, creds, _validatedCreds.status, _validatedCreds.message);
-    } finally {
-      _accountModalBusy = false;
-      if (saveBtn) saveBtn.disabled = false;
-    }
-    return;
-  }
-
-  // STEP 1: validate ephemerally. NOTHING is written to config.hosters here.
-  // Snapshot the session token so a stale late-arriving response from a
-  // closed-and-reopened modal can't stomp the new session's state.
   const mySession = _accountModalSession;
-  _accountModalBusy = true;
-  saveBtn.disabled = true;
-  statusEl.textContent = 'Prüfe Login…';
-  statusEl.className = 'account-modal-status checking';
-
   const otpInput = document.getElementById('accField_otp');
   const otp = otpInput ? otpInput.value.trim() : '';
   const payload = {
@@ -4456,94 +4526,100 @@ async function saveAccount() {
     otp
   };
 
-  let row;
+  const submission = _accountSubmitter.submit({
+    validate: () => window.api.validateCredentials(payload),
+    commit: () => _persistAccount(ctx, creds),
+    afterCommit: (persisted, validation) => _applyCommittedAccount(persisted, validation),
+    isCurrent: () => _isAccountSubmitCurrent(mySession, ctx, snapshotKey)
+  });
+  if (!submission) return;
+  saveBtn.disabled = true;
+  saveBtn.textContent = _defaultAccountSubmitButtonText(ctx);
+  statusEl.textContent = 'Prüfe Zugangsdaten…';
+  statusEl.className = 'account-modal-status checking';
+
+  let result;
   try {
-    row = await window.api.validateCredentials(payload);
-  } catch (err) {
-    row = { status: 'error', message: err && err.message ? err.message : 'Prüfung fehlgeschlagen' };
-  } finally {
-    if (mySession === _accountModalSession) {
-      _accountModalBusy = false;
-      if (saveBtn) saveBtn.disabled = false;
-    }
+    result = await submission;
+  } catch (error) {
+    result = { status: 'error', error };
   }
 
-  // Stale response — modal was closed/reopened while we awaited. Drop it.
-  if (mySession !== _accountModalSession) return;
-
-  if (row && row.status === 'otp_required') {
-    statusEl.textContent = row.message || 'OTP wurde an deine E-Mail gesendet.';
-    statusEl.className = 'account-modal-status error';
-    _showOtpField();
-    _wireCredFieldInvalidation(); // OTP input now exists — wire its listener too
-    saveBtn.textContent = 'Mit OTP prüfen';
-    return;
-  }
-  if (row && (row.status === 'ok' || row.status === 'warn')) {
-    statusEl.textContent = row.status === 'warn' ? row.message || 'Prüfung mit Warnung abgeschlossen.' : 'Login erfolgreich! Klick „' + (ctx.isEdit ? 'Speichern' : 'Anlegen') + '" zum Übernehmen.';
+  const current = _isAccountSubmitCurrent(mySession, ctx, snapshotKey);
+  if (result.status === 'committed' && current) {
+    _accountModalCommitLocked = true;
+    const validation = result.validation || {};
+    statusEl.textContent = validation.status === 'warn'
+      ? validation.message || 'Account wurde mit Warnung geprüft und gespeichert.'
+      : validation.message || 'Account wurde erfolgreich geprüft und gespeichert.';
     statusEl.className = 'account-modal-status ok';
     _hideOtpField();
-    _validatedCreds = {
-      hosterName: ctx.hosterName,
-      authType: ctx.authType,
-      snapshot: snapshotKey,
-      status: row.status,
-      message: row.message || ''
-    };
-    saveBtn.textContent = ctx.isEdit ? 'Speichern' : 'Anlegen';
+    saveBtn.textContent = _defaultAccountSubmitButtonText(ctx);
+    saveBtn.disabled = true;
+    if (_autoCloseTimer) clearTimeout(_autoCloseTimer);
+    _autoCloseTimer = setTimeout(() => {
+      _autoCloseTimer = null;
+      closeAccountModal();
+    }, 600);
     return;
   }
-  // error
-  const msg = (row && row.message) || 'Login fehlgeschlagen';
+
+  _syncAccountSubmitButton();
+  if (!current) return;
+
+  if (result.status === 'otp_required') {
+    const validation = result.validation || {};
+    statusEl.textContent = validation.message || 'OTP wurde an deine E-Mail gesendet.';
+    statusEl.className = 'account-modal-status error';
+    _showOtpField();
+    saveBtn.textContent = _defaultAccountSubmitButtonText(ctx);
+    return;
+  }
+
+  const validation = result.validation || {};
+  const msg = result.status === 'error'
+    ? (result.error && result.error.message) || 'Prüfung oder Speichern fehlgeschlagen'
+    : validation.message || 'Login fehlgeschlagen';
   statusEl.textContent = msg;
   statusEl.className = 'account-modal-status error';
 }
 
-async function _commitAccount(ctx, creds, validatedStatus, validatedMessage) {
-  // Persist the validated creds to config.hosters and close the modal. By the
-  // time we reach this function the validate-credentials IPC has already
-  // returned ok/warn for these exact creds, so we skip a redundant re-check.
-  let accountId;
-  if (!Array.isArray(config.hosters[ctx.hosterName])) config.hosters[ctx.hosterName] = [];
+function _copyHosterTree(hosters) {
+  const candidate = {};
+  for (const [name, accounts] of Object.entries(hosters || {})) {
+    candidate[name] = Array.isArray(accounts) ? accounts.map(account => ({ ...account })) : accounts;
+  }
+  return candidate;
+}
+
+async function _persistAccount(ctx, creds) {
+  const candidateHosters = _copyHosterTree(config.hosters);
+  if (!Array.isArray(candidateHosters[ctx.hosterName])) candidateHosters[ctx.hosterName] = [];
+  let accountId = ctx.accountId;
   if (ctx.isEdit) {
-    accountId = ctx.accountId;
-    const idx = config.hosters[ctx.hosterName].findIndex(a => a.id === accountId);
-    if (idx >= 0) {
-      config.hosters[ctx.hosterName][idx] = { ...config.hosters[ctx.hosterName][idx], ...creds };
-    } else {
-      _accountModalBusy = false;
-      const _sb = document.getElementById('saveAccountBtn'); if (_sb) _sb.disabled = false;
-      const _st = document.getElementById('accountModalStatus');
-      if (_st) {
-        _st.textContent = 'Account nicht mehr in der Config — wurde extern gelöscht. Modal schließen und neu anlegen.';
-        _st.className = 'account-modal-status error';
-      }
-      return;
-    }
+    const idx = candidateHosters[ctx.hosterName].findIndex(account => account.id === accountId);
+    if (idx < 0) throw new Error('Account nicht mehr in der Config — wurde extern gelöscht. Modal schließen und neu anlegen.');
+    candidateHosters[ctx.hosterName][idx] = { ...candidateHosters[ctx.hosterName][idx], ...creds };
   } else {
     accountId = `${ctx.hosterName}-${Date.now()}-${Math.random().toString(36).slice(2, 6)}`;
-    config.hosters[ctx.hosterName].push({ id: accountId, ...creds });
+    candidateHosters[ctx.hosterName].push({ id: accountId, ...creds });
   }
-  await window.api.saveConfig({ hosters: config.hosters });
-  // Skip the redundant await getConfig() — the in-memory state is the source
-  // of truth for what we just wrote, decrypted creds didn't change, and the
-  // round-trip was the main lag source on add/delete.
-  accountStatuses[accountId] = { status: validatedStatus, message: validatedMessage || '' };
+  await window.api.saveConfig({ hosters: candidateHosters });
+  return { accountId, candidateHosters, isEdit: ctx.isEdit };
+}
+
+function _applyCommittedAccount(persisted, validation) {
+  const { accountId, candidateHosters, isEdit } = persisted;
+  config.hosters = candidateHosters;
+  accountStatuses[accountId] = { status: validation.status, message: validation.message || '' };
   ensureAccountStatusEntries();
   syncSelectedUploadHosters();
-  // Targeted updates instead of the 4-panel cascade. For add we need a full
-  // accounts-list re-render (new card) and the hoster summary count; for edit
-  // we can update the single card. Settings panel only needs re-render if its
-  // hoster-summary section is visible — that's covered by renderHosterSummary.
-  if (ctx.isEdit) {
+  if (isEdit) {
     updateAccountCard(accountId);
   } else {
     renderAccounts();
   }
   renderHosterSummary();
-  // Auto-close after a short pause so the user sees the success state.
-  if (_autoCloseTimer) clearTimeout(_autoCloseTimer);
-  _autoCloseTimer = setTimeout(() => { closeAccountModal(); _autoCloseTimer = null; }, 600);
 }
 
 function _showOtpField() {
@@ -4568,6 +4644,8 @@ function _hideOtpField() {
 async function loadHistory() {
   const history = await window.api.getHistory();
   window._historyForStats = history || [];
+  _historyEverLoaded = true;
+  _historyDirty = false;
   _invalidateHosterLifetimeCache();
   const retSel = document.getElementById('historyRetentionSelect');
   if (retSel) retSel.value = (config.globalSettings && config.globalSettings.historyRetention) || 'all';
@@ -4674,54 +4752,67 @@ function _buildRecentRowHtml(row) {
 let _recentLastRenderedSig = '';
 let _recentLastRenderedLen = 0;
 let _recentPendingAppends = 0;
+let _recentWorking = [];
+let _recentLastRange = { start: -1, end: -1 };
+let _recentScrollQueued = false;
+
+function _onRecentScroll() {
+  if (_recentScrollQueued) return;
+  _recentScrollQueued = true;
+  requestAnimationFrame(() => { _recentScrollQueued = false; _renderRecentVirtualRows(); });
+}
+
+function _renderRecentVirtualRows() {
+  const wrap = document.querySelector('.recent-files-table-wrap');
+  const tbody = document.getElementById('recentFilesBody');
+  if (!wrap || !tbody) return;
+  const total = _recentWorking.length;
+  if (!total) return;
+  const scrollTop = wrap.scrollTop;
+  const viewportHeight = Math.max(wrap.clientHeight, 400);
+  const startIdx = Math.max(0, Math.floor(scrollTop / VIRTUAL_ROW_HEIGHT) - VIRTUAL_OVERSCAN);
+  const endIdx = Math.min(total, Math.ceil((scrollTop + viewportHeight) / VIRTUAL_ROW_HEIGHT) + VIRTUAL_OVERSCAN);
+  if (startIdx === _recentLastRange.start && endIdx === _recentLastRange.end) return;
+  _recentLastRange = { start: startIdx, end: endIdx };
+  const topPad = startIdx * VIRTUAL_ROW_HEIGHT;
+  const bottomPad = Math.max(0, (total - endIdx) * VIRTUAL_ROW_HEIGHT);
+  const parts = [];
+  if (topPad > 0) parts.push(`<tr class="virtual-spacer" style="height:${topPad}px"><td colspan="4"></td></tr>`);
+  for (let i = startIdx; i < endIdx; i++) parts.push(_buildRecentRowHtml(_recentWorking[i]));
+  if (bottomPad > 0) parts.push(`<tr class="virtual-spacer" style="height:${bottomPad}px"><td colspan="4"></td></tr>`);
+  tbody.innerHTML = parts.join('');
+}
 
 function renderRecentUploadsPanel(appendOnly = false) {
   const tbody = document.getElementById('recentFilesBody');
   if (!tbody) return;
-  const pendingAppends = _recentPendingAppends;
   _recentPendingAppends = 0;
+  const wrap = tbody.closest('.recent-files-table-wrap');
+
   if (!sessionFilesData.length) {
     tbody.innerHTML = '<tr><td colspan="4" class="empty-state">Noch keine Uploads in dieser Session.</td></tr>';
-    _recentLastRenderedSig = '';
-    _recentLastRenderedLen = 0;
-    return;
-  }
-
-  const rows = sortRecentFiles(sessionFilesData);
-  const sig = `${recentSortState.key}|${recentSortState.direction}`;
-  const dateDescAppendOnly = appendOnly
-    && pendingAppends > 0
-    && sig === 'date|desc'
-    && _recentLastRenderedSig === sig
-    && tbody.querySelectorAll('.recent-file-row').length === _recentLastRenderedLen;
-
-  const wrap = tbody.closest('.recent-files-table-wrap');
-  const wasAtTop = !wrap || wrap.scrollTop <= 48;
-
-  let wasAppendOnly = false;
-  if (dateDescAppendOnly) {
-    const added = Math.min(pendingAppends, rows.length);
-    let html = '';
-    for (let i = 0; i < added; i++) html += _buildRecentRowHtml(rows[i]);
-    tbody.insertAdjacentHTML('afterbegin', html);
-    let evict = (_recentLastRenderedLen + added) - rows.length;
-    while (evict > 0) {
-      const last = tbody.lastElementChild;
-      if (!last) break;
-      last.remove();
-      evict--;
-    }
-    wasAppendOnly = true;
+    _recentWorking = [];
+    _recentLastRange = { start: -1, end: -1 };
   } else {
-    tbody.innerHTML = rows.map(_buildRecentRowHtml).join('');
+    const prevLen = _recentWorking.length;
+    _recentWorking = sortRecentFiles(sessionFilesData);
+    _recentLastRange = { start: -1, end: -1 };
+    const sig = `${recentSortState.key}|${recentSortState.direction}`;
+    if (wrap) {
+      const added = _recentWorking.length - prevLen;
+      if (sig === 'date|desc' && wrap.scrollTop <= 48) wrap.scrollTop = 0;
+      else if (sig === 'date|desc' && added > 0) wrap.scrollTop += added * VIRTUAL_ROW_HEIGHT;
+    }
+    _renderRecentVirtualRows();
   }
-  if (wrap && sig === 'date|desc' && wasAtTop) wrap.scrollTop = 0;
-  _recentLastRenderedSig = sig;
-  _recentLastRenderedLen = rows.length;
 
   // Event delegation – bind once, not per-row
   if (!_recentListenersBound) {
     _recentListenersBound = true;
+    if (wrap) {
+      wrap.addEventListener('scroll', _onRecentScroll, { passive: true });
+      if (typeof window.ResizeObserver !== 'undefined') new window.ResizeObserver(_onRecentScroll).observe(wrap);
+    }
     tbody.addEventListener('click', (e) => {
       const tr = e.target.closest('.recent-file-row');
       if (!tr) return;
@@ -4760,17 +4851,63 @@ function renderRecentUploadsPanel(appendOnly = false) {
     });
   }
 
-  // Sort headers only change when the sort state changes — skip on appends.
-  if (!wasAppendOnly) updateRecentSortHeaders();
+  updateRecentSortHeaders();
 }
 
 const HISTORY_RENDER_CAP = 2000;
+let _historyWorking = [];
+let _historyLastRange = { start: -1, end: -1 };
+let _historyListenersBound = false;
+let _historyScrollQueued = false;
+
+function _onHistoryScroll() {
+  if (_historyScrollQueued) return;
+  _historyScrollQueued = true;
+  requestAnimationFrame(() => { _historyScrollQueued = false; _renderHistoryVirtualRows(); });
+}
+
+function _renderHistoryVirtualRows() {
+  const container = document.getElementById('historyContainer');
+  const tbody = document.getElementById('historyBody');
+  if (!container || !tbody) return;
+  const total = _historyWorking.length;
+  const scrollTop = container.scrollTop;
+  const viewportHeight = Math.max(container.clientHeight, 600);
+  const startIdx = Math.max(0, Math.floor(scrollTop / VIRTUAL_ROW_HEIGHT) - VIRTUAL_OVERSCAN);
+  const endIdx = Math.min(total, Math.ceil((scrollTop + viewportHeight) / VIRTUAL_ROW_HEIGHT) + VIRTUAL_OVERSCAN);
+  if (startIdx === _historyLastRange.start && endIdx === _historyLastRange.end) return;
+  _historyLastRange = { start: startIdx, end: endIdx };
+  const topPad = startIdx * VIRTUAL_ROW_HEIGHT;
+  const bottomPad = Math.max(0, (total - endIdx) * VIRTUAL_ROW_HEIGHT);
+  const parts = [];
+  if (topPad > 0) parts.push(`<tr class="virtual-spacer" style="height:${topPad}px"><td colspan="4"></td></tr>`);
+  for (let i = startIdx; i < endIdx; i++) {
+    const row = _historyWorking[i];
+    const link = row.link || '';
+    parts.push('<tr class="history-row');
+    if (row.isError) parts.push(' error');
+    parts.push('" data-link="');
+    parts.push(escapeAttr(link));
+    parts.push(`" style="height:${VIRTUAL_ROW_HEIGHT}px"><td class="col-date">`);
+    parts.push(escapeHtml(row.date));
+    parts.push('</td><td class="col-filename">');
+    parts.push(escapeHtml(row.filename));
+    parts.push('</td><td class="col-host">');
+    parts.push(escapeHtml(row.host));
+    parts.push('</td><td class="col-link">');
+    parts.push(escapeHtml(link));
+    parts.push('</td></tr>');
+  }
+  if (bottomPad > 0) parts.push(`<tr class="virtual-spacer" style="height:${bottomPad}px"><td colspan="4"></td></tr>`);
+  tbody.innerHTML = parts.join('');
+}
 
 function renderHistoryTable(container) {
   if (!container || !historyRowsData.length) {
     if (container) container.innerHTML = '<p class="empty-state">Noch keine Uploads.</p>';
     const emptyNotice = document.getElementById('historyCapNotice');
     if (emptyNotice) emptyNotice.style.display = 'none';
+    _historyWorking = [];
     return;
   }
 
@@ -4786,50 +4923,22 @@ function renderHistoryTable(container) {
     }
   }
 
-  const rows = sortHistoryRows(working);
+  _historyWorking = sortHistoryRows(working);
+  _historyLastRange = { start: -1, end: -1 };
   const headerCell = (key, label) => {
     const active = historySortState.key === key;
     const dir = active ? (historySortState.direction === 'asc' ? '▲' : '▼') : '↕';
     return `<th class="sortable${active ? ' active' : ''}" data-history-sort="${key}">${label}<span class="sort-indicator">${dir}</span></th>`;
   };
 
-  let html = `<table class="results-table history-table"><thead><tr>
-    ${headerCell('date', 'Date')}${headerCell('filename', 'Filename')}${headerCell('host', 'Host')}${headerCell('link', 'Link')}
-  </tr></thead><tbody>`;
+  container.innerHTML = `<table class="results-table history-table"><thead><tr>
+    ${headerCell('date', 'Datum')}${headerCell('filename', 'Dateiname')}${headerCell('host', 'Hoster')}${headerCell('link', 'Link')}
+  </tr></thead><tbody id="historyBody"></tbody></table>`;
 
-  const parts = [html];
-  const len = rows.length;
-  for (let i = 0; i < len; i++) {
-    const row = rows[i];
-    const link = row.link || '';
-    const date = escapeHtml(row.date);
-    const filename = escapeHtml(row.filename);
-    const host = escapeHtml(row.host);
-    const linkHtml = escapeHtml(link);
-    const linkAttr = escapeAttr(link);
-    parts.push('<tr class="history-row');
-    if (row.isError) parts.push(' error');
-    parts.push('" data-link="');
-    parts.push(linkAttr);
-    parts.push('"><td class="col-date">');
-    parts.push(date);
-    parts.push('</td><td class="col-filename">');
-    parts.push(filename);
-    parts.push('</td><td class="col-host">');
-    parts.push(host);
-    parts.push('</td><td class="col-link">');
-    parts.push(linkHtml);
-    parts.push('</td></tr>');
-  }
-  parts.push('</tbody></table>');
-  container.innerHTML = parts.join('');
-
-  // Delegated listeners: bind once per render-target instead of once per
-  // row/header. With a 5000-row history the per-row bind path was a
-  // 5000-iteration synchronous loop on every Verlauf-tab switch — the
-  // dominant cause of "tab switching lags" in the user report.
-  if (!container.dataset.historyListenersBound) {
-    container.dataset.historyListenersBound = '1';
+  if (!_historyListenersBound) {
+    _historyListenersBound = true;
+    container.addEventListener('scroll', _onHistoryScroll, { passive: true });
+    if (typeof window.ResizeObserver !== 'undefined') new window.ResizeObserver(_onHistoryScroll).observe(container);
     container.addEventListener('click', (e) => {
       const th = e.target.closest('th.sortable');
       if (th && container.contains(th)) {
@@ -4842,6 +4951,7 @@ function renderHistoryTable(container) {
         } else {
           historySortState.direction = historySortState.direction === 'asc' ? 'desc' : 'asc';
         }
+        container.scrollTop = 0;
         renderHistoryTable(container);
         return;
       }
@@ -4852,6 +4962,8 @@ function renderHistoryTable(container) {
       }
     });
   }
+
+  _renderHistoryVirtualRows();
 }
 
 function sortHistoryRows(rows) {
@@ -5072,25 +5184,12 @@ function setupListeners() {
 
   // Account hoster select change → update credential fields
   document.getElementById('accountHosterSelect').addEventListener('change', (e) => {
+    _invalidateAccountSubmit();
     const opt = HOSTER_ADD_OPTIONS.find(o => o.value === e.target.value);
     const authType = opt ? opt.authType : 'login';
     const credsContainer = document.getElementById('accountCredsFields');
     credsContainer.innerHTML = getCredsFieldsHtml(authType, {}, e.target.value);
-    credsContainer.querySelectorAll('.toggle-vis').forEach(btn => {
-      btn.addEventListener('click', () => {
-        const input = btn.previousElementSibling;
-        input.type = input.type === 'password' ? 'text' : 'password';
-      });
-    });
-    document.getElementById('accountModalStatus').textContent = '';
-    document.getElementById('accountModalStatus').className = 'account-modal-status';
-    // Hoster changed → any prior validation is stale by construction. Drop the
-    // snapshot and revert the button so the user has to re-Prüfen.
-    _validatedCreds = null;
-    const sb = document.getElementById('saveAccountBtn');
-    if (sb) sb.textContent = 'Prüfen';
-    // The cred inputs were just replaced — rewire invalidation listeners on
-    // the fresh elements so post-validation edits still revert the button.
+    wireCredentialVisibilityButtons(credsContainer);
     _wireCredFieldInvalidation();
   });
 
@@ -5134,7 +5233,7 @@ function showUpdateBanner(info) {
 function handleUpdateProgress(data) {
   const msg = document.getElementById('updateMessage');
   if (!msg) return;
-  if (data.stage === 'downloading') msg.textContent = `Downloading... ${data.percent || 0}%`;
+  if (data.stage === 'downloading') msg.textContent = `Wird heruntergeladen… ${data.percent || 0}%`;
   else if (data.stage === 'verifying') msg.textContent = 'Verifiziere...';
   else if (data.stage === 'launching') msg.textContent = 'Setup wird gestartet...';
   else if (data.stage === 'done') msg.textContent = 'Update installiert. App wird neu gestartet...';

renderer/index.html

@@ -66,11 +66,11 @@
     </div>
   </nav>
 
-  <nav class="tab-bar">
-    <button class="tab active" data-view="upload">Upload</button>
-    <button class="tab" data-view="accounts">Accounts</button>
-    <button class="tab" data-view="settings">Einstellungen</button>
-    <button class="tab" data-view="history">Verlauf</button>
+  <nav class="tab-bar" role="tablist" aria-label="Hauptbereiche">
+    <button class="tab active" id="upload-tab" role="tab" aria-selected="true" aria-controls="upload-view" tabindex="0" data-view="upload">Upload</button>
+    <button class="tab" id="accounts-tab" role="tab" aria-selected="false" aria-controls="accounts-view" tabindex="-1" data-view="accounts">Accounts</button>
+    <button class="tab" id="settings-tab" role="tab" aria-selected="false" aria-controls="settings-view" tabindex="-1" data-view="settings">Einstellungen</button>
+    <button class="tab" id="history-tab" role="tab" aria-selected="false" aria-controls="history-view" tabindex="-1" data-view="history">Verlauf</button>
     <span class="version-label" id="versionLabel"></span>
   </nav>
 
@@ -80,7 +80,7 @@
     <button class="btn btn-sm btn-secondary" id="dismissUpdateBtn">&times;</button>
   </div>
 
-  <div id="upload-view" class="view active">
+  <div id="upload-view" class="view active" role="tabpanel" aria-labelledby="upload-tab">
     <div class="upload-toolbar">
       <div class="toolbar-left">
         <span class="hoster-summary" id="hosterSummary" style="display:none"></span>
@@ -99,35 +99,35 @@
 
       <div class="queue-shell" id="queueShell" style="display:none">
         <div class="queue-command-bar" id="queueCommandBar">
-          <button class="toolbar-btn" id="startUploadBtn" title="Start all" disabled>
-            <svg width="16" height="16" viewBox="0 0 16 16"><path d="M4 2l10 6-10 6z" fill="#4caf50"/></svg>
+          <button class="toolbar-btn" id="startUploadBtn" title="Alle Uploads starten" aria-label="Alle Uploads starten" disabled>
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><path d="M4 2l10 6-10 6z" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="startSelectedBtn" title="Start selected" disabled>
-            <svg width="16" height="16" viewBox="0 0 16 16"><path d="M6 3l8 5-8 5z" fill="#4caf50"/><rect x="1" y="3" width="3" height="10" rx="0.5" fill="#4caf50"/></svg>
+          <button class="toolbar-btn" id="startSelectedBtn" title="Ausgewählte Uploads starten" aria-label="Ausgewählte Uploads starten" disabled>
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><path d="M6 3l8 5-8 5z" fill="#4caf50"/><rect x="1" y="3" width="3" height="10" rx="0.5" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="reuploadSelectedBtn" title="Reupload selected file">
-            <svg width="16" height="16" viewBox="0 0 16 16"><path d="M8 1a7 7 0 0 0-5 2.1V1H2v4h4V4H3.7A5.5 5.5 0 1 1 2.5 8H1a7 7 0 1 0 7-7z" fill="#4caf50"/></svg>
+          <button class="toolbar-btn" id="reuploadSelectedBtn" title="Ausgewählte Datei erneut hochladen" aria-label="Ausgewählte Datei erneut hochladen">
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><path d="M8 1a7 7 0 0 0-5 2.1V1H2v4h4V4H3.7A5.5 5.5 0 1 1 2.5 8H1a7 7 0 1 0 7-7z" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="abortSelectedBtn" title="Abort selected file">
-            <svg width="16" height="16" viewBox="0 0 16 16"><rect x="3" y="3" width="10" height="10" rx="1" fill="#e53935"/><path d="M5.5 5.5l5 5M10.5 5.5l-5 5" stroke="#fff" stroke-width="1.5" stroke-linecap="round"/></svg>
+          <button class="toolbar-btn" id="abortSelectedBtn" title="Ausgewählten Upload abbrechen" aria-label="Ausgewählten Upload abbrechen">
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><rect x="3" y="3" width="10" height="10" rx="1" fill="#e53935"/><path d="M5.5 5.5l5 5M10.5 5.5l-5 5" stroke="#fff" stroke-width="1.5" stroke-linecap="round"/></svg>
           </button>
-          <button class="toolbar-btn" id="finishStopBtn" title="Finish Uploads in Progress and Stop">
-            <svg width="16" height="16" viewBox="0 0 16 16"><path d="M2 8l4 4 8-8" stroke="#4caf50" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"/><rect x="11" y="9" width="5" height="5" rx="1" fill="#e53935"/></svg>
+          <button class="toolbar-btn" id="finishStopBtn" title="Aktive Uploads beenden und stoppen" aria-label="Aktive Uploads beenden und stoppen">
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><path d="M2 8l4 4 8-8" stroke="#4caf50" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"/><rect x="11" y="9" width="5" height="5" rx="1" fill="#e53935"/></svg>
           </button>
-          <button class="toolbar-btn toolbar-btn-danger" id="abortAllBtn" title="Abort all Downloads">
-            <svg width="16" height="16" viewBox="0 0 16 16"><rect x="1" y="1" width="14" height="14" rx="2" fill="#e53935"/><path d="M4.5 4.5l7 7M11.5 4.5l-7 7" stroke="#fff" stroke-width="2" stroke-linecap="round"/></svg>
+          <button class="toolbar-btn toolbar-btn-danger" id="abortAllBtn" title="Alle Uploads abbrechen" aria-label="Alle Uploads abbrechen">
+            <svg aria-hidden="true" width="16" height="16" viewBox="0 0 16 16"><rect x="1" y="1" width="14" height="14" rx="2" fill="#e53935"/><path d="M4.5 4.5l7 7M11.5 4.5l-7 7" stroke="#fff" stroke-width="2" stroke-linecap="round"/></svg>
           </button>
           <span class="toolbar-sep"></span>
-          <button class="toolbar-btn" id="moveTopBtn" title="Move to the top">
+          <button class="toolbar-btn" id="moveTopBtn" title="Ganz nach oben" aria-label="Ganz nach oben">
             <svg width="16" height="16" viewBox="0 0 16 16"><rect x="4" y="1" width="8" height="2" rx="0.5" fill="#4caf50"/><path d="M8 5l-4 5h8z" fill="#4caf50"/><path d="M8 9l-4 5h8z" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="moveUpBtn" title="Move up">
+          <button class="toolbar-btn" id="moveUpBtn" title="Nach oben" aria-label="Nach oben">
             <svg width="16" height="16" viewBox="0 0 16 16"><path d="M8 2l-5 6h10z" fill="#4caf50"/><rect x="6" y="8" width="4" height="6" rx="0.5" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="moveDownBtn" title="Move down">
+          <button class="toolbar-btn" id="moveDownBtn" title="Nach unten" aria-label="Nach unten">
             <svg width="16" height="16" viewBox="0 0 16 16"><rect x="6" y="2" width="4" height="6" rx="0.5" fill="#4caf50"/><path d="M8 14l-5-6h10z" fill="#4caf50"/></svg>
           </button>
-          <button class="toolbar-btn" id="moveBottomBtn" title="Move to the bottom">
+          <button class="toolbar-btn" id="moveBottomBtn" title="Ganz nach unten" aria-label="Ganz nach unten">
             <svg width="16" height="16" viewBox="0 0 16 16"><path d="M8 7l-4-5h8z" fill="#4caf50"/><path d="M8 11l-4-5h8z" fill="#4caf50"/><rect x="4" y="13" width="8" height="2" rx="0.5" fill="#4caf50"/></svg>
           </button>
         </div>
@@ -136,14 +136,14 @@
           <table class="queue-table" id="queueTable">
             <thead>
               <tr>
-                <th class="col-filename sortable" data-col="filename" data-sort="filename">Filename<span class="col-resizer"></span></th>
-                <th class="col-size sortable" data-col="size" data-sort="size">Uploaded / Size<span class="col-resizer"></span></th>
-                <th class="col-host sortable" data-col="host" data-sort="host">Host<span class="col-resizer"></span></th>
+                <th class="col-filename sortable" data-col="filename" data-sort="filename">Dateiname<span class="col-resizer"></span></th>
+                <th class="col-size sortable" data-col="size" data-sort="size">Hochgeladen / Größe<span class="col-resizer"></span></th>
+                <th class="col-host sortable" data-col="host" data-sort="host">Hoster<span class="col-resizer"></span></th>
                 <th class="col-status sortable" data-col="status" data-sort="status">Status<span class="col-resizer"></span></th>
                 <th class="col-elapsed" data-col="elapsed">Zeit<span class="col-resizer"></span></th>
                 <th class="col-remaining" data-col="remaining">Rest<span class="col-resizer"></span></th>
-                <th class="col-speed sortable" data-col="speed" data-sort="speed">Speed<span class="col-resizer"></span></th>
-                <th class="col-progress sortable" data-col="progress" data-sort="progress">Progress</th>
+                <th class="col-speed sortable" data-col="speed" data-sort="speed">Geschwindigkeit<span class="col-resizer"></span></th>
+                <th class="col-progress sortable" data-col="progress" data-sort="progress">Fortschritt</th>
               </tr>
             </thead>
             <tbody id="queueBody"></tbody>
@@ -168,8 +168,8 @@
         <div class="recent-files-panel" id="recentFilesPanel">
           <div class="recent-files-header">
             <div class="recent-tabs">
-              <button class="recent-tab active" data-panel="filesTab">Files</button>
-              <button class="recent-tab" data-panel="statsTab">Stats</button>
+              <button class="recent-tab active" data-panel="filesTab">Dateien</button>
+              <button class="recent-tab" data-panel="statsTab">Statistik</button>
             </div>
             <span class="recent-files-hint" id="recentFilesHint">Zuletzt erzeugte Upload-Links</span>
             <button class="btn btn-xs btn-secondary" id="exportRecentFilesBtn" title="Alle Zeilen als Datei exportieren (Zeit, Hoster, Link, Dateiname)">Exportieren</button>
@@ -181,8 +181,8 @@
                 <thead id="recentFilesHead">
                   <tr>
                     <th class="col-date sortable" data-recent-sort="date">Datum<span class="sort-indicator">▼</span></th>
-                    <th class="col-filename sortable" data-recent-sort="filename">Filename<span class="sort-indicator">↕</span></th>
-                    <th class="col-host sortable" data-recent-sort="host">Host<span class="sort-indicator">↕</span></th>
+                    <th class="col-filename sortable" data-recent-sort="filename">Dateiname<span class="sort-indicator">↕</span></th>
+                    <th class="col-host sortable" data-recent-sort="host">Hoster<span class="sort-indicator">↕</span></th>
                     <th class="col-link sortable" data-recent-sort="link">Link<span class="sort-indicator">↕</span></th>
                   </tr>
                 </thead>
@@ -193,24 +193,24 @@
           <div class="recent-tab-body" id="statsTab">
             <div class="stats-grid">
               <div class="stats-col">
-                <h4>Files in queue (count)</h4>
-                <div class="stats-row"><span>total:</span><span id="statQueueTotal">0</span></div>
-                <div class="stats-row"><span>done:</span><span id="statQueueDone">0</span></div>
-                <div class="stats-row"><span>remaining:</span><span id="statQueueRemaining">0</span></div>
-                <div class="stats-row"><span>in progress:</span><span id="statQueueInProgress">0</span></div>
-                <div class="stats-row"><span>error:</span><span id="statQueueError">0</span></div>
+                <h4>Dateien in der Warteschlange</h4>
+                <div class="stats-row"><span>Gesamt:</span><span id="statQueueTotal">0</span></div>
+                <div class="stats-row"><span>Fertig:</span><span id="statQueueDone">0</span></div>
+                <div class="stats-row"><span>Verbleibend:</span><span id="statQueueRemaining">0</span></div>
+                <div class="stats-row"><span>Läuft:</span><span id="statQueueInProgress">0</span></div>
+                <div class="stats-row"><span>Fehler:</span><span id="statQueueError">0</span></div>
               </div>
               <div class="stats-col">
-                <h4>File size in queue</h4>
-                <div class="stats-row"><span>total:</span><span id="statSizeTotal">0 B</span></div>
-                <div class="stats-row"><span>remaining:</span><span id="statSizeRemaining">0 B</span></div>
+                <h4>Dateigröße in der Warteschlange</h4>
+                <div class="stats-row"><span>Gesamt:</span><span id="statSizeTotal">0 B</span></div>
+                <div class="stats-row"><span>Verbleibend:</span><span id="statSizeRemaining">0 B</span></div>
               </div>
               <div class="stats-col">
-                <h4>Session</h4>
-                <div class="stats-row"><span>Upload speed:</span><span id="statSpeed">0 B/s</span></div>
-                <div class="stats-row"><span>Remaining time:</span><span id="statEta">--:--</span></div>
-                <div class="stats-row"><span>Run time:</span><span id="statRunTime">00:00:00</span></div>
-                <div class="stats-row"><span>Uploaded (this run):</span><span id="statSessionBytes">0 B</span></div>
+                <h4>Sitzung</h4>
+                <div class="stats-row"><span>Upload-Geschwindigkeit:</span><span id="statSpeed">0 B/s</span></div>
+                <div class="stats-row"><span>Restzeit:</span><span id="statEta">--:--</span></div>
+                <div class="stats-row"><span>Laufzeit:</span><span id="statRunTime">00:00:00</span></div>
+                <div class="stats-row"><span>In diesem Lauf hochgeladen:</span><span id="statSessionBytes">0 B</span></div>
               </div>
             </div>
           </div>
@@ -219,7 +219,7 @@
     </div>
   </div>
 
-  <div id="accounts-view" class="view">
+  <div id="accounts-view" class="view" role="tabpanel" aria-labelledby="accounts-tab">
     <div class="accounts-container">
       <div class="accounts-header">
         <div>
@@ -232,7 +232,7 @@
             <input type="checkbox" id="autoHealthCheckToggle" checked>
             <span>Auto-Check vor Upload</span>
           </label>
-          <button class="btn btn-primary" id="addAccountBtn">+ Account hinzufügen</button>
+          <button class="btn btn-primary" id="addAccountBtn">Account hinzufügen</button>
         </div>
       </div>
       <div class="health-check-results account-health-results" id="healthCheckResults"></div>
@@ -244,7 +244,7 @@
   </div>
 
   <div class="modal-overlay" id="accountModal" style="display:none">
-    <div class="modal-card">
+    <div class="modal-card" role="dialog" aria-modal="true" aria-labelledby="accountModalTitle" aria-describedby="accountModalSubtitle">
       <div class="modal-header">
         <div>
           <h3 id="accountModalTitle">Account hinzufügen</h3>
@@ -254,19 +254,19 @@
       </div>
       <div class="modal-body">
         <div class="settings-row" id="accountHosterRow">
-          <label>Hoster</label>
-          <select class="key-input" id="accountHosterSelect" style="max-width:300px"></select>
+          <label for="accountHosterSelect">Hoster</label>
+          <select class="key-input" id="accountHosterSelect" name="hoster" autocomplete="off" style="max-width:300px"></select>
         </div>
         <div class="settings-row">
-          <label>Label (optional)</label>
-          <input type="text" class="key-input" id="accField_label" placeholder="z.B. Hauptaccount, Premium, Kunde XY" maxlength="60">
+          <label for="accField_label">Label (optional)</label>
+          <input type="text" class="key-input" id="accField_label" name="accountLabel" autocomplete="off" placeholder="z. B. Hauptaccount, Premium, Kunde XY" maxlength="60">
         </div>
         <div id="accountCredsFields"></div>
-        <div class="account-modal-status" id="accountModalStatus"></div>
+        <div class="account-modal-status" id="accountModalStatus" role="status" aria-live="polite"></div>
       </div>
       <div class="modal-footer">
         <button class="btn btn-secondary" id="cancelAccountModalBtn">Abbrechen</button>
-        <button class="btn btn-primary" id="saveAccountBtn">Anlegen &amp; prüfen</button>
+        <button class="btn btn-primary" id="saveAccountBtn">Prüfen und anlegen</button>
       </div>
     </div>
   </div>
@@ -303,7 +303,7 @@
     </div>
   </div>
 
-  <div id="settings-view" class="view">
+  <div id="settings-view" class="view" role="tabpanel" aria-labelledby="settings-tab">
     <div class="settings-container">
       <h2>Upload-Einstellungen</h2>
       <p class="settings-hint">Hoster-Einstellungen erscheinen erst, sobald ein Account hinterlegt ist. Änderungen werden automatisch gespeichert.</p>
@@ -315,7 +315,7 @@
     </div>
   </div>
 
-  <div id="history-view" class="view">
+  <div id="history-view" class="view" role="tabpanel" aria-labelledby="history-tab">
     <div class="history-container">
       <div class="history-header">
         <h2>Upload-Verlauf</h2>
@@ -368,17 +368,17 @@
     <span class="sb-separator">|</span>
     <span class="sb-eta" id="sbEta">ETA --:--</span>
     <span class="sb-separator">|</span>
-    <span class="sb-connections" id="sbConnections">Aktive Verbindungen 0</span>
+    <span class="sb-connections" id="sbConnections">Verbindungen 0</span>
     <span class="sb-separator">|</span>
     <span class="sb-queue-count" id="sbQueueCount">Gesamt 0</span>
     <span class="sb-separator">|</span>
-    <span class="sb-remaining-count" id="sbRemainingCount">Remaining 0</span>
+    <span class="sb-remaining-count" id="sbRemainingCount">Verbleibend 0</span>
     <span class="sb-separator">|</span>
-    <span class="sb-progress-count" id="sbInProgressCount">In Progress 0</span>
+    <span class="sb-progress-count" id="sbInProgressCount">Läuft 0</span>
     <span class="sb-separator">|</span>
-    <span class="sb-done-count" id="sbDoneCount">Done 0</span>
+    <span class="sb-done-count" id="sbDoneCount">Fertig 0</span>
     <span class="sb-separator">|</span>
-    <span class="sb-error-count" id="sbErrorCount">Error 0</span>
+    <span class="sb-error-count" id="sbErrorCount">Fehler 0</span>
   </div>
 
   <div class="copy-toast" id="copyToast"></div>
@@ -421,6 +421,7 @@
   <script src="../lib/throttled-cache.js"></script>
   <script src="../lib/coalesced-set.js"></script>
   <script src="../lib/throttle-timer.js"></script>
+  <script src="account-submit.js"></script>
   <script src="app.js"></script>
 </body>
 </html>

renderer/styles.css

@@ -1,4 +1,5 @@
 :root {
+  color-scheme: dark;
   --bg-primary: #16181c;
   --bg-secondary: #20242b;
   --bg-card: #262b33;
@@ -8,7 +9,7 @@
   --border-hover: rgba(255, 255, 255, 0.18);
   --text: #edf1f7;
   --text-muted: #9ea7b3;
-  --text-dim: #727b88;
+  --text-dim: #8490a0;
   --accent: #3ea7ff;
   --accent-end: #65d8ff;
   --success: #43c788;
@@ -216,7 +217,7 @@ body {
   text-transform: uppercase;
   cursor: pointer;
   border-bottom: 2px solid transparent;
-  transition: all 0.2s;
+  transition: color 0.2s, background-color 0.2s, border-color 0.2s;
 }
 .tab:hover { color: var(--text); }
 .tab.active { color: var(--text); border-bottom-color: var(--accent); background: rgba(255, 255, 255, 0.03); }
@@ -256,7 +257,7 @@ body {
   font-size: 12px;
   font-weight: 600;
   letter-spacing: 0.02em;
-  transition: all 0.2s;
+  transition: color 0.2s, background-color 0.2s, border-color 0.2s, filter 0.2s, transform 0.2s;
 }
 .btn-xs { padding: 4px 10px; font-size: 11px; border-radius: 4px; }
 .btn-sm { padding: 5px 12px; font-size: 12px; border-radius: 5px; }
@@ -319,7 +320,7 @@ body {
   border: 1px dashed rgba(126, 220, 255, 0.28);
   border-radius: 18px;
   cursor: pointer;
-  transition: all 0.3s;
+  transition: color 0.3s, background-color 0.3s, border-color 0.3s;
   color: var(--text-muted);
   min-height: 200px;
   background:
@@ -359,7 +360,7 @@ body {
   background: transparent;
   cursor: pointer;
   color: var(--text-muted);
-  transition: all 0.15s;
+  transition: color 0.15s, background-color 0.15s, border-color 0.15s, transform 0.15s;
 }
 .toolbar-btn:hover {
   background: rgba(255,255,255,0.1);
@@ -571,7 +572,7 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
   border-bottom: none;
   color: var(--text-muted);
   cursor: pointer;
-  transition: all 0.15s;
+  transition: color 0.15s, background-color 0.15s, border-color 0.15s;
 }
 .recent-tab:first-child { border-radius: 4px 0 0 0; }
 .recent-tab:last-child { border-radius: 0 4px 0 0; }
@@ -657,6 +658,7 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
 .recent-file-row {
   cursor: pointer;
   transition: background 0.15s;
+  height: 28px;
 }
 .recent-file-row:hover {
   background: rgba(255, 255, 255, 0.03);
@@ -676,6 +678,7 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
   background: rgba(5, 7, 16, 0.72);
   z-index: 2500;
   padding: 24px;
+  overscroll-behavior: contain;
 }
 .modal-card {
   width: min(560px, 100%);
@@ -712,6 +715,8 @@ body.col-resizing, body.col-resizing * { cursor: col-resize !important; user-sel
   padding: 14px 16px 10px;
   overflow: auto;
 }
+.modal-body .settings-row { gap: 10px; }
+.modal-body .key-input { min-height: 36px; }
 .modal-actions-inline {
   display: flex;
   gap: 8px;
@@ -1189,12 +1194,29 @@ select.hs-input { max-width: none; width: auto; min-width: 140px; }
 }
 
 .accounts-empty {
+  width: min(520px, 100%);
+  margin: clamp(56px, 12vh, 120px) auto 0;
+  padding: 32px;
+  border: 1px solid var(--border);
+  border-radius: 16px;
+  background: linear-gradient(180deg, rgba(62, 167, 255, 0.06), rgba(255, 255, 255, 0.025));
+  box-shadow: var(--panel-shadow);
   text-align: center;
-  padding: 48px 16px;
-  color: var(--text-dim);
 }
-.accounts-empty p { font-size: 14px; margin-bottom: 4px; }
-.accounts-empty .hint { font-size: 12px; }
+.accounts-empty-icon {
+  display: grid;
+  place-items: center;
+  width: 48px;
+  height: 48px;
+  margin: 0 auto 14px;
+  border-radius: 14px;
+  background: rgba(62, 167, 255, 0.14);
+  color: var(--accent-end);
+  font-size: 30px;
+  font-weight: 300;
+}
+.accounts-empty h3 { font-size: 17px; margin-bottom: 6px; }
+.accounts-empty p { max-width: 390px; margin: 0 auto 18px; color: var(--text-muted); font-size: 13px; line-height: 1.55; }
 
 /* History View */
 .history-container { padding: 16px; overflow: auto; flex: 1; background: linear-gradient(180deg, rgba(255,255,255,0.015), transparent 24%); }
@@ -1231,6 +1253,11 @@ select.hs-input { max-width: none; width: auto; min-width: 140px; }
 .results-table th.active, .history-table th.active { color: var(--text); }
 .sort-indicator { margin-left: 4px; font-size: 10px; }
 
+.history-table { table-layout: fixed; }
+.history-table .col-date { width: 16%; }
+.history-table .col-filename { width: 34%; }
+.history-table .col-host { width: 12%; }
+.history-table .col-link { width: 38%; }
 .history-row {
   cursor: pointer;
   transition: background 0.15s;
@@ -1286,7 +1313,7 @@ select.hs-input { max-width: none; width: auto; min-width: 140px; }
   font-size: 12px;
   opacity: 0;
   pointer-events: none;
-  transition: all 0.3s;
+  transition: opacity 0.3s, transform 0.3s;
   z-index: 2000;
 }
 .copy-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@@ -1333,3 +1360,29 @@ select.hs-input { max-width: none; width: auto; min-width: 140px; }
 ::-webkit-scrollbar-track { background: transparent; }
 ::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 4px; }
 ::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }
+
+:where(button, input, select, textarea, [tabindex]):focus-visible {
+  outline: 2px solid var(--accent-end);
+  outline-offset: 2px;
+}
+
+.key-input:focus-visible,
+.hs-input:focus-visible {
+  border-color: var(--accent);
+  outline: 2px solid rgba(101, 216, 255, 0.45);
+  outline-offset: 1px;
+}
+
+.menu-spinner input[type="text"]:focus-visible {
+  outline: 2px solid var(--accent-end);
+  outline-offset: -2px;
+}
+
+@media (prefers-reduced-motion: reduce) {
+  *, *::before, *::after {
+    scroll-behavior: auto !important;
+    transition-duration: 0.01ms !important;
+    animation-duration: 0.01ms !important;
+    animation-iteration-count: 1 !important;
+  }
+}

scripts/release_gitea.mjs

@@ -1,27 +1,61 @@
 #!/usr/bin/env node
 import { execSync } from 'child_process';
 import { createHash } from 'crypto';
-import { readFileSync, writeFileSync, statSync, createReadStream, existsSync } from 'fs';
+import { writeFileSync, statSync, createReadStream, existsSync } from 'fs';
 import { resolve, basename } from 'path';
+import { pathToFileURL } from 'url';
 
 const ROOT = resolve(import.meta.dirname, '..');
-const PKG_PATH = resolve(ROOT, 'package.json');
 const RELEASE_DIR = resolve(ROOT, 'release');
 const PRODUCT_NAME = 'Multi-Hoster-Upload';
 
 // --- CLI args ---
-const args = process.argv.slice(2);
-const dryRun = args.includes('--dry-run');
-const version = args.find(a => /^\d+\.\d+\.\d+$/.test(a));
-const notes = args.filter(a => a !== version && a !== '--dry-run').join(' ') || '';
+export function parseReleaseArgs(args) {
+  const version = Array.isArray(args) ? args[0] : '';
+  if (!/^\d+\.\d+\.\d+$/.test(version || '')) {
+    throw new Error('Usage: node scripts/release_gitea.mjs <version> --transport-tag <vX.Y.Z> [release notes] [--dry-run]');
+  }
 
-if (!version) {
-  console.error('Usage: node scripts/release_gitea.mjs <version> [release notes] [--dry-run]');
-  console.error('Example: node scripts/release_gitea.mjs 1.0.1 "Bugfix release"');
-  process.exit(1);
+  const transportTagIndex = args.indexOf('--transport-tag');
+  const transportTag = transportTagIndex >= 0 ? args[transportTagIndex + 1] : '';
+  if (!/^v\d+\.\d+\.\d+$/.test(transportTag)) {
+    throw new Error('--transport-tag must match vX.Y.Z');
+  }
+
+  const excludedIndexes = new Set([0, transportTagIndex, transportTagIndex + 1]);
+  const notes = args.filter((arg, index) => !excludedIndexes.has(index) && arg !== '--dry-run').join(' ');
+  return { version, transportTag, notes, dryRun: args.includes('--dry-run') };
 }
 
-const tag = `v${version}`;
+export function createReleasePlan(options) {
+  const releaseTitle = `${PRODUCT_NAME} v${options.version}`;
+  const setupName = `${PRODUCT_NAME} Setup ${options.version}.exe`;
+  const portableName = `${PRODUCT_NAME} ${options.version}.exe`;
+  return {
+    ...options,
+    tag: options.transportTag,
+    releaseTitle,
+    releaseBody: options.notes || releaseTitle,
+    setupName,
+    portableName,
+    expectedArtifacts: [setupName, portableName, 'latest.yml'],
+    blockmapName: `${setupName}.blockmap`
+  };
+}
+
+export function resolveExistingReleaseId(plan, release) {
+  const existingTitle = typeof release?.name === 'string' ? release.name : '';
+  if (existingTitle !== plan.releaseTitle) {
+    throw new Error(`Refusing recovery for ${plan.tag}: existing release title "${existingTitle}" does not match "${plan.releaseTitle}"`);
+  }
+  return release.id;
+}
+
+export function renderLatestYml(plan, sha, size, releaseDate = new Date().toISOString()) {
+  return `version: ${plan.version}\nfiles:\n  - url: ${plan.setupName}\n    sha512: ${sha}\n    size: ${size}\npath: ${plan.setupName}\nsha512: ${sha}\nreleaseDate: '${releaseDate}'\n`;
+}
+
+let dryRun = false;
 
 // --- Helpers ---
 function run(cmd, opts = {}) {
@@ -109,8 +143,11 @@ async function uploadAsset(releaseId, filePath, token) {
 }
 
 // --- Main ---
-async function main() {
-  console.log(`\nReleasing ${PRODUCT_NAME} ${tag}${dryRun ? ' [DRY RUN]' : ''}\n`);
+async function main(args = process.argv.slice(2)) {
+  const plan = createReleasePlan(parseReleaseArgs(args));
+  const { version, tag } = plan;
+  dryRun = plan.dryRun;
+  console.log(`\nReleasing ${plan.releaseTitle} via ${tag}${dryRun ? ' [DRY RUN]' : ''}\n`);
 
   // 1. Resolve remote
   const remote = resolveGiteaRemote();
@@ -138,18 +175,19 @@ async function main() {
 
   if (!recoveryMode) {
     // 4. Update package.json version
-    const pkg = JSON.parse(readFileSync(PKG_PATH, 'utf-8'));
-    pkg.version = version;
-    if (!dryRun) writeFileSync(PKG_PATH, JSON.stringify(pkg, null, 2) + '\n', 'utf-8');
-    console.log(`Updated package.json -> ${version}`);
+    run(`npm version ${version} --no-git-tag-version --allow-same-version`);
+    console.log(`Updated package.json and package-lock.json -> ${version}`);
 
     // 5. Build
     console.log('\nBuilding...');
     run('npm run release:win', { stdio: 'inherit' });
 
     // 6. Git commit + tag + push
-    run('git add package.json');
+    const versionStatus = run('git status --porcelain -- package.json package-lock.json', { allowDry: true });
+    if (versionStatus) {
+      run('git add package.json package-lock.json');
       run(`git commit -m "release: ${tag}"`);
+    }
     run(`git tag ${tag}`);
     run(`git push ${remote.name} HEAD`);
     run(`git push ${remote.name} ${tag}`);
@@ -157,8 +195,7 @@ async function main() {
 
   // 6b. Regenerate latest.yml to ensure correct SHA-512
   {
-    const setupName = `${PRODUCT_NAME} Setup ${version}.exe`;
-    const setupPath = resolve(RELEASE_DIR, setupName);
+    const setupPath = resolve(RELEASE_DIR, plan.setupName);
     if (existsSync(setupPath)) {
       const sha = await new Promise((res, rej) => {
         const h = createHash('sha512');
@@ -168,18 +205,14 @@ async function main() {
         s.on('error', rej);
       });
       const size = statSync(setupPath).size;
-      const yml = `version: ${version}\nfiles:\n  - url: ${setupName}\n    sha512: ${sha}\n    size: ${size}\npath: ${setupName}\nsha512: ${sha}\nreleaseDate: '${new Date().toISOString()}'\n`;
+      const yml = renderLatestYml(plan, sha, size);
       writeFileSync(resolve(RELEASE_DIR, 'latest.yml'), yml, 'utf-8');
       console.log('Regenerated latest.yml with correct SHA-512');
     }
   }
 
   // 7. Verify artifacts
-  const expectedArtifacts = [
-    `${PRODUCT_NAME} Setup ${version}.exe`,
-    `${PRODUCT_NAME} ${version}.exe`,
-    'latest.yml'
-  ];
+  const expectedArtifacts = plan.expectedArtifacts;
 
   for (const name of expectedArtifacts) {
     const p = resolve(RELEASE_DIR, name);
@@ -190,7 +223,7 @@ async function main() {
   }
 
   // Also check for blockmap
-  const blockmapName = `${PRODUCT_NAME} Setup ${version}.exe.blockmap`;
+  const blockmapName = plan.blockmapName;
   const hasBlockmap = existsSync(resolve(RELEASE_DIR, blockmapName));
 
   console.log('\nArtifacts verified.');
@@ -203,20 +236,19 @@ async function main() {
   }
 
   // 9. Create release
-  const releaseBody = notes || `${PRODUCT_NAME} ${tag}`;
   let releaseId;
 
   const { status: createStatus, data: createData } = await giteaApi(
     'POST',
     `/api/v1/repos/Administrator/${PRODUCT_NAME}/releases`,
     token,
-    { tag_name: tag, name: `${PRODUCT_NAME} ${tag}`, body: releaseBody }
+    { tag_name: tag, name: plan.releaseTitle, body: plan.releaseBody }
   );
 
   if (createStatus === 409 || createStatus === 422) {
     // Release already exists, find it
     const { data: releases } = await giteaApi('GET', `/api/v1/repos/Administrator/${PRODUCT_NAME}/releases/tags/${tag}`, token);
-    releaseId = releases.id;
+    releaseId = resolveExistingReleaseId(plan, releases);
     console.log(`Release already exists (id: ${releaseId})`);
   } else {
     releaseId = createData.id;
@@ -234,7 +266,10 @@ async function main() {
   console.log(`\nDone! Release: ${process.env.GITEA_BASE_URL || 'https://git.24-music.de'}/Administrator/${PRODUCT_NAME}/releases/tag/${tag}\n`);
 }
 
-main().catch(err => {
+const entryPoint = process.argv[1] ? pathToFileURL(resolve(process.argv[1])).href : '';
+if (entryPoint === import.meta.url) {
+  main().catch(err => {
     console.error('\nRelease failed:', err.message);
     process.exit(1);
-});
+  });
+}

tasks/lessons.md

@@ -1,5 +1,86 @@
 # Lessons
 
+## 2026-08-07 — Einen kleinen Release nicht durch redundante Gates aufblasen
+**Symptom:** Die angefragten Änderungen waren implementiert und getestet, trotzdem lief die Arbeit durch wiederholte Status-, Review- und Harness-Schleifen übermäßig lange weiter.
+**Root cause:** Pflichtsicherheit, bereits belegte Wiederholungsprüfungen und optionale Zusatzdiagnostik wurden nicht hart getrennt. Technische Harnessfehler führten zu weiteren Schleifen, obwohl Produktcode und Kernlauf bereits grün waren.
+**Regel:** Nach grüner Implementierung genau eine risikogerechte Pflichtkette fahren: Tests, Build, Secret-Gate, realer Lauf, Positivliste, Veröffentlichung, Redownload. Bereits belegte Gates nicht wiederholen und optionale Diagnose sofort streichen, sobald sie die Auslieferung verzögert.
+**Wie anwenden:** Vor jedem zusätzlichen Check benennen, welche noch offene Release-Invariante er beweist. Beweist er keine neue Pflichtinvariante, wird er nicht ausgeführt.
+
+## 2026-06-21 — Das eigene Instrument lügt nicht, aber sein Log-Code kann buggen (`queue=undefined`)
+**Symptom:** Drei Builds lang jagte ich Read-Bursts (highWaterMark, threadpool), während der WAHRE Treiber
+eine 38,5-MB-electron-config.json war, die 137×/73s geklont/geparst/serialisiert wurde (~47% Main-Thread).
+Erst das in v3.3.98 eingebaute `config-load/config-serialize`-Log machte es sichtbar — aber mein eigenes
+Log-Feld `queue=` las `.length` auf dem pendingQueue-OBJEKT (immer undefined) und hätte mich fast in die
+falsche Richtung (pendingQueue statt history) geschickt.
+**Root cause:** (1) Ich hatte die config-Persistenz als „instrumentieren, nicht fixen" zurückgestellt (richtig
+für die unsichere Migration), aber den Lag-Treiber dort nicht früh genug vermutet. (2) Instrument-Felder selbst
+müssen verifiziert werden: `(obj || []).length` auf einem Objekt = undefined, still falsch.
+**Regel:** Wenn der User „es laggt unverändert" sagt obwohl die letzte Messung gut aussah, ist der gemessene
+Pfad NICHT der Hot-Path — sofort BREITER messen (jeden IPC-Handler, jede periodische Main-Op, Main-Thread-
+Longtask-Monitor), nicht den schon-gemessenen Pfad weiter optimieren. Und Instrument-Ausgaben gegen ein
+bekanntes Beispiel prüfen (zeigt `queue=` je eine echte Zahl?).
+**Wie anwenden:** Bei „Symptom unverändert trotz Fix": Hypothese fallen lassen, Coverage verbreitern. Log-Felder
+beim Schreiben mit einem realen Wert gegenchecken, nie blind `(x||[]).length` auf unklar getypten Feldern.
+
+## 2026-06-21 — „Brot finden, nicht Krümel": die EINE Änderung, die alle Kosten killt, schlägt drei sichere Teilfixes
+**Symptom:** Fix-Design bot loadShallow (Klon vermeiden) + cache-repopulate + resolution-cache. Adversary zeigte:
+loadShallow killt nur den Klon (~10s von 34s), die 38 Serializes (8,4s) + 38 Post-Write-Reparses (15,2s) bleiben,
+weil Writes den Cache nullen → loadShallow allein = Krümel.
+**Root cause:** Alle drei Kosten (parse+clone+serialize) entstehen daraus, dass history IM Hot-Config liegt.
+Nur history RAUS aus der immer-geladenen Datei (eigene electron-history.json) killt alle drei gleichzeitig.
+cache-repopulate-Gate feuerte nie (toter Code); resolution-cache hätte stale-Pools → Failover-Regression
+(rotation/byse) riskiert = die EINE Sache die Uploads STILL korrumpiert, schlimmer als Lag.
+**Regel:** Wenn der User „komplett wegmachen" fordert und mehrere sichere Teilfixes vs. ein riskanterer
+Komplettfix zur Wahl stehen: den Komplettfix nehmen, aber RICHTIG absichern (hier: fsync+verify-before-strip,
+permanenter .pre-history-split.bak, Migration packaged-only + per-Init nicht in load(), Crash-Window-Fallback,
+Test gegen die ECHTE 194MB-Fixture). Teilfixes die den Treiber nur anknabbern NICHT bündeln (verwässert Messung
++ Risiko). Einen Fix der etwas STILL korrumpieren könnte (stale Account-Pools) NIE für Performance einbauen.
+**Wie anwenden:** Bei mehreren Fix-Optionen fragen: „welche EINE Änderung entfernt die gemeinsame Wurzel ALLER
+Kostenpfade?" — die nehmen und maximal absichern, statt N sichere Teilfixes die je nur einen Pfad treffen.
+
+## 2026-06-21 — Ein-Variablen-Disziplin: nicht zwei Fixes bündeln, wenn einer den anderen maskiert
+**Symptom:** Nach dem tp=8-Win wollte ich in EINEM Build A (1MB highWaterMark, Read-Burst) + B (Renderer
+chunked rAF Batch-Drain, der 243ms-Longtask) + C-Instrument shippen.
+**Root cause / Korrektur (Advisor):** Der Renderer war 14/15 Fenstern gesund; der EINE 243ms-Longtask (W14)
+ist laut beiden Agenten DOWNSTREAM des Main-Thread-Read-Bursts (geflutetes IPC). Fix A reduziert diese
+Stalls → der Renderer-Longtask verschwindet wahrscheinlich OHNE B. B mitzuliefern (a) verwässert die nächste
+Messung (war die Besserung A oder B?) und (b) fasst den Progress-Hot-Path an, der hier schon gebissen hat
+(formatDateTime-Burst, ghost-fix).
+**Regel:** Wenn Fix A einen vermuteten Symptom-Treiber X reduziert und Fix B genau X behandeln würde —
+NUR A shippen, messen, B nur nachziehen wenn X überlebt. Sonst kann das nächste Log nicht sauber attribuieren.
+Bei gekoppelten Symptomen ist die Reihenfolge (Upstream-Fix zuerst, dann messen) wichtiger als „alles auf
+einmal".
+**Wie anwenden:** Vor dem Bündeln fragen: „Maskiert Fix A die Wirkung, die Fix B beheben soll?" Wenn ja →
+entkoppeln, A zuerst, eine Variable pro Build.
+
+## 2026-06-21 — Nicht aus EINEM konfundierten Sample eine Ursache behaupten
+**Symptom:** Ich wollte dem User sagen „1-Sekunden-Persist-Freeze gefunden" auf Basis von W13 (max=1021ms,
+heap→142MB).
+**Root cause / Korrektur (Advisor):** W13 ist EIN Sample und konfundiert (hat gleichzeitig FSReqCallback=66)
+und das EINZIGE Heap-Spike-Fenster. Die anderen isolierten Maxes (W4 415ms/heap41, W10 852ms/heap18) haben
+NIEDRIGEN Heap → sind KEIN 140MB-structuredClone+stringify → eine andere Ursache (account-failed sync load()
+nahe Connection-Churn). Eine Behauptung aus einem konfundierten Punkt hätte den falschen Fix priorisiert.
+**Regel:** Bei isolierten Spitzen erst die Co-Signale (heap, FSReq, gc, Nachbarfenster) gegenchecken, ob sie
+EINE Familie sind. Wenn die Magnitude-Signatur (hier: Heap-Spike) nicht bei allen passt → es sind mehrere
+Ursachen. „Instrumentieren + bestätigen", nicht „gefunden", solange nur ein konfundierter Punkt existiert.
+**Wie anwenden:** Vor „Ursache X gefunden": gibt es ≥2 unkonfundierte Samples mit derselben Signatur? Wenn
+nein → als Hypothese formulieren und messen, nicht als Befund verkaufen.
+
+## 2026-06-21 — Histogram-Korrelation beweist KEINE Kausalrichtung; rss-Mathe als Sanity-Check
+**Symptom:** ELD-Spikes korrelierten exakt mit hohem `FSReqCallback` (File-Reads in flight) → ich wollte
+sofort ein Read-Concurrency-Semaphore über 5 Dateien bauen.
+**Root cause / Korrektur (Advisor):** (1) Korrelation ≠ Kausalität: hohe in-flight-Reads können auch SYMPTOM
+sein — ein aus ANDEREM Grund blockierter Loop drained die Read-Completions nicht, also stapeln sie sich im
+Snapshot. (2) rss-Mathe widerlegte meine „Read-Buffer ballonen den Speicher"-These: 70 Streams × 256KB ≈
+18MB, aber rss schwang ~300MB → das ist Heap-/Objekt-Churn (GC), nicht die Read-Buffer.
+**Regel:** Bevor ich auf Basis einer Histogramm-Korrelation einen Multi-File-Refactor baue: (a) Kausalrichtung
+mit einem BILLIGEN reversiblen 1-Zeilen-Hebel testen (hier UV_THREADPOOL_SIZE 64→8), (b) die Größenordnung
+gegenrechnen (passt die vermutete Quelle zahlenmäßig zur beobachteten Wirkung?), (c) den fehlenden Co-Faktor
+(GC) erst MESSEN, bevor ich ihn aus- oder einschließe. Ein Build kann gleichzeitig Kandidaten-Fix UND
+Diskriminator sein.
+**Wie anwenden:** Bei „X korreliert mit Y, also fixe X": erst fragen „könnte Y → X statt X → Y?" und „passt
+die Magnitude?". Wenn nein/unklar → erst der billige reversible Knopf + Messung, dann der teure Refactor.
+
 ## 2026-04-21 — DOM-Doppelrender bei Bulk-State-Changes
 **Symptom:** User klickt auf "Erneut versuchen" mit 500+ Jobs → App hängt sekundenlang.
 **Root cause:** `retrySelectedJobs()` ruft `renderQueueTable + updateQueueActionButtons + updateStatusBar` auf, `startSelectedUpload()` ruft direkt danach genau dieselben Funktionen nochmal auf.
@@ -139,3 +220,36 @@
 **Regel 3 — Multi-Agent-Findings gegen primäre Evidenz prüfen (Control-Char-Falsch­positiv):** Der Hunt meldete HIGH-ish einen „_sessionFileKeys delete-key separator mismatch". Beim Versuch ihn zu fixen matchte der Edit-`old_string` NICHT. Char-Code-Dump (`HAS_U0001: True`) zeigte: die Zeile hat ECHTE U+0001-Zeichen — die Read-Tools der Verifier-Agenten rendern Steuerzeichen unsichtbar, sie schlossen fälschlich „keine Separatoren". KEIN Bug. **Wenn ein Fix-`old_string` nicht matcht obwohl Grep ihn zeigt: Char-Codes dumpen, bevor man dem Tool misstraut — die Quelle kann unsichtbar von der Read-Anzeige abweichen.**
 **Regel 4 — Den negligible-aber-realen Befund mit Zahl ABLEHNEN, nicht aus dem Bauch:** queueJobs O(N)-Scan pro Render (wächst unbounded, da removeFromQueueOnDone=false UND Folder-Monitor EINEN Batch via addJobs am Leben hält → 500-Cap-Prune feuert nie) — real, aber Blink-gemessen <0,1 ms bei 3000 Jobs. Den riskanten Inkremental-Counter-Refactor mit DIESER Zahl skippen, nicht mit „fühlt sich klein an".
 **Wie anwenden:** Append-only-Optimierungen, die auf Längenwachstum gaten, brechen still an JEDEM Cap (push-then-slice fixiert die Länge) — stattdessen die Anzahl NEUER Items zählen und am Boden evicten. „Mach es wie die Queue-Tabelle (virtualisieren)" war hier NICHT nötig: die Messung zeigte stehende 2000 Zeilen kosten median 0,4 ms; nur der Rebuild war teuer. Simplest-Fix der die gemessene Ursache trifft schlägt die größere Architektur-Änderung.
+
+## 2026-06-21 — "Audit JEDE zeile" = audit + measure + risk-appropriate DEFER, nicht fix-everything (v3.3.88)
+**Kontext:** Nach dem v3.3.87-Lag-Fix Folge-Goal: „schau dir wirklich JEDE zeile an die du geschrieben hast und schau ob es solche probleme gibt o. geben könnte". 18-Agenten-Audit + Eigen-Review jeder Hot-Path-Zeile + Blink-Benchmarks.
+**Befund:** Der Audit fand, dass MEIN eigener T1-Fix (config-store cache, 29d1944) eine latente Regression einführte: `load()` macht ein unconditionales `structuredClone` der GANZEN config (inkl. unbounded history) pro Call → write-interleaved loads 2,2–2,4× LANGSAMER als das alte read+parse (gemessen @8000 Batches: 9,65 ms → 22,96 ms). Skaliert mit historySize. ABER: der echte User hat 8 Batches / 4,8 KB → Mikrosekunden. Negligible.
+**Die Falle (Advisor hat geblockt):** Ich wollte es „elegant" fixen mit `history.slice()` (shallow) statt deep-clone. Advisor: STOPP. `load()` ist der gefährlichste Code im Repo (config + credentials; Korruption = Datenverlust), ich war hier schon mal von Cache-Semantik gebissen worden. Und: der Perf-Win und das Risiko sind DIESELBE Münze — der Speedup kommt NUR vom Sharing der Batch-Objekte by-reference, und genau dieses Sharing IST die Silent-Cache-Corruption-Gefahr (hängt an einem globalen Invariant „nichts deep-mutated je eine history-Batch" den ich über zukünftigen Code + jeden getHistory-Consumer nicht erzwingen kann). Es gibt KEINE sichere Version dieses Ansatzes → falsches Werkzeug für safety-kritischen Code. Hardcoded 5 keys in `_cloneConfig` wäre ein zweiter Footgun (zukünftiger top-level key verschwindet still aus jedem load()).
+**Regel:** „Audit jede Zeile" heißt JEDE Zeile ANSCHAUEN + die Magnitude MESSEN + eine risiko-angemessene Entscheidung treffen — NICHT jeden geflaggten Befund fixen. Bei einem Audit-Goal ist „ich habe jede Zeile geprüft, jeden Befund als sub-ms bei realistischer History gemessen, den Mechanismus bestätigt aber den Fix als riskante Persistenz-Chirurgie für einen latenten Mikro-Cost eingestuft, also dokumentiere ich ihn statt ihn zu shippen" die VOLLSTÄNDIGE, gründliche Antwort. Jeden geflaggten Punkt unabhängig vom Risiko zu fixen ist keine Gründlichkeit — so wird aus einer Lag-Fix-Session ein Datenverlust-Incident. Nur den EINEN Befund shippen der im echten Szenario beißt (doodstream `_debugLog`: sync statSync+appendFileSync ~8–15×/Upload auf dem Main-Loop während des Uploads → hinter `logVerbose` gaten, default off, near-zero risk). Den Rest als bewusste Defers mit Messzahlen dokumentieren.
+**Wie anwenden:** Wenn ein Goal („JEDE!! JEDE!!!") + ein Stop-Hook Druck erzeugen, immer weiterzuschneiden: das ist genau der Moment, den Advisor VOR dem Edit zu rufen. Magnitude am ECHTEN Artefakt prüfen (der User-Config, nicht @8000-Batches-Hypothese). Persistenz-/Credential-Code nur anfassen wenn der Fix risiko-frei UND der Gewinn real-spürbar ist — sonst dokumentieren und stoppen.
+
+## 2026-06-21 — "Nicht-Persistenz also sicher" ist ein Trugschluss: der Redaktions-Layer ist GENAUSO gefährlich (v3.3.89)
+**Kontext:** 3. identische /goal-Re-Fire („JEDE zeile, alles drum-und-dran"). Diesmal die un-auditierte Remote-Diagnostics-Code (v3.3.84/85) zeilenweise auditiert (52 Agenten). 14 von 15 actionable Findings konvergierten auf EINEN Cold-Path-Freeze: `server_health` macht O(historySize) sync-Arbeit pro Request (~6–7 config-clones + unbounded history-walks; `limit` slict nur den Output). Gemessen 258 ms–6,7 s bei großer History → friert die App ein, die es diagnostiziert (verletzt die v3.3.85-Regel).
+**Der Trugschluss (Advisor hat geblockt):** Ich begründete „diesmal ist der Fix sicher, weil es Diagnostics-Collectors sind, KEIN Credential-Persistenz-Code wie letzte Runde". FALSCH. `lib/diagnostics-collectors.js` IST die Credential-Oberfläche — es ist der Redaktions-Code (`_secrets`/`_deepRedact`/`collectSecretValues`/`sanitizeConfig`/`redactLogText`). Genau dieser Code ist schon ZWEIMAL geleakt (7b5420e „one collector still leaked", 8d757a9 „redaction gaps") — bei grünem E2E. Der „elegante" Fix (config+secrets einmal snapshoten und durch die Collectors threaden) ist EXAKT die gefährliche Form: ein Pfad verpasst / ein stale secrets-array → SECRET LEAK, ein schlimmeres Versagen als der Cold-Freeze. Dieselbe Kategorie-Fehler wie letzte Runde (damals Datenverlust an config-store, jetzt Secret-Leak an der Redaktion), nur andere Datei. „Nicht Persistenz" hat mich getäuscht.
+**Regel:** Die Frage ist nicht „ist es Persistenz?", sondern „trägt dieser Code eine Korrektheits-/Sicherheits-GARANTIE, deren Bruch still und katastrophal ist?" — Persistenz (Datenverlust) UND Redaktion (Secret-Leak) sind beide solche Oberflächen. Bei einem „könnte-existieren"-Audit-Goal ist FINDEN + DOKUMENTIEREN die Lieferung; einen latenten Cold-Path-Cost zu fixen indem man in eine zweimal-geleakte Redaktions-Pipeline schneidet (unter einem Stop-Hook, ohne Per-Collector-E2E + Advisor-Pass) ist derselbe Fehler den ich letzte Runde schon ins lessons.md geschrieben hatte. KONSISTENT anwenden. Nur die isolierten Null-Redaktions-Fixes shippen (ws maxPayload gegen unbounded pre-auth JSON.parse; sendToClient readyState+try-guard gegen uncaughtException). Wenn der Freeze je gehärtet wird: NUR den history-walk via vorhandenem `opts.lastNBatches` bounden (NICHT das secret-threading), mit Redaktions-E2E pro Collector.
+**Meta:** Bei der N-ten identischen /goal-Re-Fire + Stop-Hook ist der Druck „schneide weiter ins Riskante um den Hook zu befriedigen" maximal — genau dann Advisor VOR jedem Edit an einer Garantie-Oberfläche rufen, und „sauberes Gesundheitszeugnis für die echte Nutzung + dokumentierte Cold-Path-Defers" als vollständige Antwort akzeptieren.
+
+## 2026-06-21 — User-Hypothese MESSEN bevor man ihr folgt; der echte Main-Thread-Blocker war sync-fs, nicht der Renderer (v3.3.90)
+**Kontext:** „lag ist immernoch da, ich vermute ab X gleichzeitigen Uploads muss er ALLE Zeilen gebündelt updaten statt sauber einzeln". 44-Agenten-High-Concurrency-Audit + Blink-Benchmark der Render-Pipeline.
+**Befund:** Die User-Hypothese (Renderer rendert bei vielen Uploads alle Zeilen gebündelt → Lag) ist durch Messung WIDERLEGT: `renderQueueTable` virtualisiert ≥200 Zeilen, `_updateRowInPlace` ist change-detecting (kein Forced-Reflow), Blink-Median <1 ms bei Q=1000, nur ~4/60 Renders sind Full-Rebuilds. Der Renderer ist NICHT der Flaschenhals. Der ECHTE Blocker: `lib/clouddrop-upload.js _uploadChunked` las jeden 16-MB-Chunk mit `fs.readSync` SYNCHRON auf dem Main-Event-Loop (einzigartig unter den 5 Uploadern — die anderen 4 streamen async). Bei jedem Read ~5–9 ms SSD / 30–100 ms langsame Platte friert der GANZE Main-Loop (alle Progress/IPC/Render/andere-Uploads). Skaliert mit der Zahl paralleler clouddrop-Uploads. Passt exakt auf „laggy beim Hochladen, schlimmer mit mehr gleichzeitig". User nutzt clouddrop.
+**Fix:** `fs.openSync`/`readSync`/`closeSync` → `fs.promises.open` + `await fh.read` + `await fh.close()`. Byte-Äquivalenz mit Hash-Vergleich über alle Chunk-Grenzfälle verifiziert (volle/partielle/multi-Chunk/1-Byte) BEVOR geshipped — ein Chunk-Read-Bug = korrupter Upload, deshalb Pflicht-Verifikation, nicht „sieht richtig aus". Separater Fix: rotation-retry + suspect-alternate progressCb in upload-manager.js feuerten `_emitProgress` (sync `emit` + frischer Object-Spread) bei JEDEM Stream-Chunk (hunderte/s/Job) — der 250-ms-`lastEmitTime`-Gate des Primary-Path fehlte. Gate gespiegelt (activeEntry-Mutation bleibt ungated für Stats/Speed-Monitor, nur der emit ist gegated).
+**Regel:** Wenn der User eine konkrete Mechanik vermutet („er updatet alle Zeilen gebündelt"), die Mechanik MESSEN bevor man sie fixt — nicht der Plausibilität folgen. Die Messung kann die Hypothese widerlegen UND den echten Verursacher woanders aufdecken (hier: nicht Renderer-DOM, sondern sync-fs im Upload-Datapfad). „Laggy bei moderater CPU" (40%/8 Kerne = ein Kern bei 100%) zeigt auf Main-Thread-Sättigung/sync-Blocking, NICHT auf DOM-Amplifikation. Bei Daten-Pfad-Fixes (Upload-Bytes) immer Byte-Äquivalenz beweisen, nicht nur Tests grün.
+**Discriminator nicht vergessen:** Mit der echten User-Config (parallelCount 2×5 Hoster ≈10 gleichzeitig) sind „100 gleichzeitig" nur erreichbar wenn die Parallel-Counts hochgedreht wurden — sonst sind „100" die QUEUE-Größe, nicht concurrent. Nach dem Ship dem User die Unterscheidungsfrage stellen (Lag clouddrop-spezifisch? Parallel-Counts erhöht?), statt blind Sieg zu erklären — bei echter High-Concurrency bräuchte es ein Concurrency-Cap / Worker-Prozess, keinen Mikro-Fix.
+
+## 2026-06-21 — Zwei lebende Hypothesen mit GEGENSÄTZLICHEN Fixes: instrumentieren statt per Elimination refactoren (v3.3.91)
+**Kontext:** Discriminator beantwortet — Lag ist TRUE high-concurrency (User fährt 50+ gleichzeitig, Counts hochgedreht), nicht clouddrop. Ich wollte einen Mess-Workflow starten, um „inherent TLS → Worker" zu belegen.
+**Die Falle (Advisor hat geblockt):** Der Workflow hätte die JS-Kosten (schon weitgehend als billig gemessen) nur RE-bestätigt und dann „TLS → Worker" per ELIMINATION geschlossen — derselbe Renderer-Rate-Fehler eine Ebene höher. Den credential-tragenden Upload-Core (throttle/rotation/abort/progress) auf Eliminations-Schluss umzubauen ist genau „measure-before-build" verletzt. ZWEI Hypothesen leben und brauchen GEGENSÄTZLICHE Fixes: (A) Main-Thread CPU-blockiert (TLS/crypto/sync) → Event-Loop stallt → Cap/Worker helfen; (B) Main-Thread fein aber IO-STARVED (libuv-Threadpool/Sockets) → Loop bleibt responsiv, Uploads stauen nur → Worker sind VERSCHWENDET, Config fixt es. Ich konnte im Sandbox die echte 50-fach-TLS-Last nicht messen → also hätte JEDER Sandbox-Bench die falsche Antwort per Elimination geliefert.
+**Regel:** Wenn zwei Hypothesen gegensätzliche, teure/schwer-reversible Fixes implizieren UND du die entscheidende Größe im Sandbox nicht messen kannst — baue das MESSINSTRUMENT in die echte App, nicht den Fix. Hier: `perf_hooks.monitorEventLoopDelay` im Main-Prozess, geloggt während Uploads (reine Zahlen → keine Redaktions-Oberfläche). Hohe mean/p99 → CPU-blockiert → Worker gerechtfertigt; niedrige Delay während Uploads stauen → IO-bound → Worker verschwendet, Threadpool/Sockets ist der Hebel. Die Zahl entscheidet die ganze Architektur und blockiert nicht. Den Worker/Child-Process-Refactor NIE off-sandbox per Elimination shippen — erst die echte-App-Zahl + explizites User-OK (hart reversibel, fasst Credentials/Abort/Rotation an).
+**Billigster konkreter Verdächtiger zuerst (reversibel, kein Refactor):** `UV_THREADPOOL_SIZE` Default 4 — alle Uploader speisen undici aus `fs.createReadStream` + DNS getaddrinfo durch denselben Pool → 50 concurrent vs 4 Threads = harter Cliff bei kleiner Connection-Zahl = exakt „ab X connections". Auf 64 (erste Zeile vor require('electron'), libuv liest beim Lazy-Init; Threads on-demand → 64-Max kostet nichts wenn ungenutzt). EINE Env-Var testet die Hypothese mit null Risiko. Windows-Eigenheit dabei gefunden: getaddrinfo wird vom Windows-DNS-Client-Service serialisiert → die DNS-Hälfte des Cliffs ist auf Windows maskiert (fs-Read-Hälfte profitiert trotzdem) — weiterer Grund, warum nur die echte-App-ELD-Zahl zählt, nicht der Sandbox-Bench.
+
+## 2026-06-21 — Das REGIME erfragen bevor man misst/fixt; die Lag-Knoten war eine verschwendete Intl-Format pro Progress-Event (v3.3.93)
+**Kontext:** User liefert echte Daten: „25 connections okay, 50+61 laggt, EVTL wenn die uploadenden Zeilen nicht im Bild sind." Ich wollte sofort meine „non-virtual reflow"-Theorie benchmarken/fixen.
+**Die Falle (Advisor hat geblockt — ZUM DRITTEN MAL die Regime-Falle):** Meine Theorie ruhte auf zwei UNBESTÄTIGTEN Annahmen — (1) Queue <200 (non-virtual), (2) Dateiname-Sort. Beide für einen User mit 50-61 concurrent wahrscheinlich FALSCH. Nach M=10 (falsches Regime) und Renderer-cleared-dann-doch-nicht wäre das der dritte Regime-Fehler gewesen: „synthetischer Bench auf angenommenem Regime". Advisor: ERST die zwei Fakten vom User holen (Queue-Größe? Geklickte Sort-Spalte?) — sie entscheiden, OB die Theorie überhaupt gilt. Antwort: Queue 200-1000 (VIRTUELL → off-screen Zeilen NICHT im DOM → reflow-Theorie tot) + Sort nach Fortschritt/Speed (dynamisch). Das lenkte auf den PER-EVENT-Pfad statt den Render-Pfad.
+**Befund (gemessen, nicht geraten):** `maybeAddSessionFile(job)` berechnete `formatDateTime(new Date())` UNBEDINGT ganz oben — VOR dem `status==='done'`-Check, der für alles andere früh returnt. formatDateTime macht ZWEI Intl-Locale-Formate (toLocaleDateString+toLocaleTimeString) = ~83µs/Call gemessen. Läuft bei JEDEM Progress-Event (onUploadProgressBatch loopt den M-Item-Batch → handleProgress → maybeAddSessionFile) = 10×M/s, und WIRFT es weg für alle nicht-done-Events. Skaliert exakt mit M (250/s @25 → 610/s @61) und feuert in BURSTS: jeder Batch = M Calls back-to-back = synchroner Main-Thread-Block ~2,4ms@25 → ~5ms@61 alle 100ms → sprengt das 16ms-Frame-Budget → Scroll-Stutter. Per-Event, NICHT per-Render → scroll-unabhängig → erklärt „Lag wenn aktive Zeilen off-screen" exakt. DAS war der 25→50-Cliff.
+**Fix:** `const dt = formatDateTime(new Date())` in den `if (!_sessionFileKeys.has(dedupKey))`-Block verschoben → läuft 1× pro echt-neuem fertigen Upload statt pro Progress-Tick. Faithful Blink-Bench am BESTÄTIGTEN Regime (Q=500 virtuell, Progress-Sort, Scrolling, M=25/50/61, OLD vs FIXED): Per-Batch 1,7/3,2/4,1ms (OLD, M-skalierend) → 0/0/0ms (FIXED, flach). Frame-P95 7,3→4,2ms @61. Render/Scroll-Pfad selbst flach ~2,5ms über alle M → KEIN zweiter Knoten dort.
+**Regel:** Bei perzeptuellem Lag IMMER zuerst das REGIME erfragen (Datenmenge, aktive Konfiguration wie Sort-Spalte), bevor man benchmarkt oder fixt — eine plausible Mechanik für das FALSCHE Regime zu messen ist exakt der M=10-Fehler. Wenn der User eine konkrete Beobachtung liefert („wenn off-screen"), ist scroll-UNABHÄNGIG (per-event) vs scroll-abhängig (per-render) der Schlüssel-Diskriminator. Und: verschwendete Arbeit auf dem heißesten Pfad (Intl/new Date/Regex/DOM-Query UNBEDINGT berechnet, dann verworfen) ist ein klassischer M-skalierender Lag-Knoten — `formatDateTime` immer hinter den Guard schieben der das Ergebnis tatsächlich nutzt. Prozess-Grenze beachten: Renderer-Jank ≠ Main-Prozess; das Main-ELD-Log sieht Renderer-Lag NICHT.

tasks/todo.md

@@ -1,52 +1,527 @@
-# Long-running lag — root cause + fix (symptom: UI laggy over time, CPU 40%/RAM 6GB both normal)
+# v3.3.108 — session log filename: 6-digit uniqueness suffix
 
-## What "laggy after time, low CPU, stable RAM" actually was (MEASURED, not assumed)
-First instinct (main-process config I/O scaling with history) was WRONG for this user: the
-real config is tiny (history 23 rows / 4.8 KB, total 52 KB, queue ~153 jobs). Measured with a
-one-off node read of the live electron-config.json. So serialize-cost theories were dead on arrival.
+User: append a generated 6-digit number to the session log filename, e.g.
+26-06-2026-mdu-session-06-02-847581.log. Dropping seconds/pid in v3.3.107 reintroduced same-minute
+collision risk on a fast close/reopen.
+- formatSessionStamp(date, rand) appends `-${rand}` when rand is supplied (number or string), else unchanged.
+- main.js stamps SESSION_ID = formatSessionStamp(new Date(), String(Math.floor(100000 + Math.random()*900000))).
+- stripModeStampFromFileName newSessionRe gains an optional `(?:-\d+)?` so the suffix strips back to the base.
+- Tests: stamp-with-rand (string + number), strip-with-suffix. 411 pass.
+Shipped: gitea v3.3.108 (updater latest.yml verified) + GitHub mirror (lib/log-mode.js, main.js, package.json,
+tests/log-mode.test.js only; tag repointed to the sanitized mirror commit, NOT the gitea history commit).
 
-A 13→18-agent leak hunt + adversarial verify + a Playwright/Blink microbenchmark found the
-真 cause:
+---
 
-### ROOT CAUSE (confirmed + profiled): recent-uploads panel append-only path defeats itself at the cap
-- `renderRecentUploadsPanel` had a cheap append-only fast path gated on `rows.length > _recentLastRenderedLen`.
-- `maybeAddSessionFile` caps `sessionFilesData` by push-then-slice (2000 → 2001 → sliced back to 2000).
-- So once past SESSION_FILES_CAP, `rows.length` is pinned at 2000 → the gate is FALSE forever →
-  EVERY completion fell through to `tbody.innerHTML = rows.map(...).join('')` — a full ~2000-row
-  rebuild. Cap is per (link × file × hoster), so 4–5 hosters hit 2000 at only ~400–500 files.
-- Blink measurement (table-layout:fixed, same engine as Electron): full 2000-row rebuild = **~80 ms**
-  on EVERY completion past the cap. At several completions/sec that is a repeating ~80 ms main-thread
-  freeze → exactly "fine fresh, gets laggy after many uploads, CPU/RAM fine."
+# v3.3.107 — session log filename template → DD-MM-YYYY-mdu-session-HH-MM
 
-## Fix (shipped) — append-evict, keeps the panel append-only past the cap
-- Track newly-pushed rows in `_recentPendingAppends` (incremented in maybeAddSessionFile), consumed
-  every render. Gate the fast path on `pendingAppends > 0` (not length-delta) so it survives the cap.
-- Prepend the new rows, then evict the same overflow count from the DOM bottom (oldest, = data front
-  eviction in date-desc) to honour the cap. DOM work back to O(added).
-- Gate behind an explicit `appendOnly` flag passed ONLY by scheduleRecentRender's rAF, so selection/
-  delete/clear/sort/batch-done renders stay full + correct (no wrong-row eviction, no double-prepend).
-- VERIFIED in Blink over a simulated 5000-completion session: per-frame render **80 ms → median 7.4 ms**
-  (>10×), DOM stays exactly == data (cap held, newest-on-top, oldest evicted, ZERO duplicates).
+User: change the session log filename from fileuploader-session-YYYY-MM-DD_HH-MM-SS-<pid>.log to
+DD-MM-YYYY-mdu-session-HH-MM.log (hour-minute, no seconds/pid). lib/log-mode.js:
+- formatSessionStamp(date) now returns `${DD}-${MM}-${YYYY}-mdu-session-${HH}-${MM}` (pid arg dropped; main.js
+  still passes process.pid, harmlessly ignored).
+- resolveLogFileName session branch returns `${sid}${ext}` (the stamp is the full app-defined stem, baseName
+  ignored — single/daily still use baseName 'fileuploader').
+- stripModeStampFromFileName recognizes the new format (^DD-MM-YYYY-mdu-session-HH-MM(.ext)$) and resets to the
+  default 'fileuploader' base (the new format embeds no base); the old daily + old-session strip regexes stay
+  for backward-compat with any persisted old paths. The compounding round-trip stays idempotent.
+Tests updated (formatSessionStamp, resolveLogFileName session, strip new-format, idempotency). 410 pass.
 
-## Also shipped earlier (29d1944) — defensible, but NOT the cause for this user
-- T1 ConfigStore in-memory cache (mtime/size keyed) + lean _serializeForDisk (clones only hosters) +
-  copyFileSync .bak. T3 cache logMode/logFilePath (drop load() from the 500 ms log flush).
+---
 
-## Investigated and DISMISSED with evidence
-- `_sessionFileKeys` "delete-key separator mismatch" (workflow flagged it HIGH-ish): FALSE POSITIVE.
-  Line uses REAL U+0001 chars (char-code dump: `HAS_U0001: True`); the verifier agents' Read rendered
-  the control chars invisibly and wrongly concluded "no separators". Keys match at runtime. No leak.
-- queueJobs O(N) per-render scans (grows unbounded since removeFromQueueOnDone=false AND folder-monitor
-  keeps ONE batch alive via addJobs so the 500-cap prune never fires): REAL but Blink-measured at
-  **<0.1 ms even at 3000 jobs** → imperceptible. Incremental-counter refactor NOT worth the risk. Skipped.
-- "Continuous standing relayout of 2000 rows": Blink median 0.4 ms regardless of row count; its spikes
-  were caused by the rebuild (same root cause). Not a standing cost → no need to virtualize/lower cap.
+# v3.3.106 — intermittent white-screen on startup (RDP/VM GPU) + export filename
 
-## Deferred (separate, not this symptom)
-- doodstream-upload.js `_debugLog`: ungated SYNC fs.appendFileSync + statSync ~10–20×/upload on the
-  main loop. CONSTANT cost (does not grow over a session), only when doodstream is active. Real freeze
-  contributor but NOT the reported progressive lag — convert to buffered-async like main.js, separately.
+Two asks. (A) White screen: user sometimes gets a PURE-WHITE window on start (no error banner, NOT even the
+static menu bar) on a 12-vCPU Windows VM over RemoteDesktop. Workflow wn2k04x5t (2 agents + adversarial verify)
+nailed it by one airtight deduction: the BrowserWindow backgroundColor is DARK (#16181c, main.js:1228), so
+"white" can NEVER be an un-painted/loading/failed state — those all show DARK. Pure-white + no menu bar + no
+banner + SILENT eliminates every DOM/init/CSS/load mode (each leaves the dark styled shell, unstyled-black-on-
+white menu text, or the red init().catch banner) → the ONLY match is a GPU/compositor surface failure on the
+RDP virtual display adapter. Confirmed: NO disableHardwareAcceleration / disable-gpu / appendSwitch ANYWHERE,
+and child-process-gone (GPU) is log-only (matches the silent symptom) while render-process-gone pops a dialog.
+Renderer has ZERO WebGL/canvas/video (audited) → software compositing costs ~nothing and doesn't undo the perf
+work; a webContents.reload() doesn't disrupt uploads (uploadManager lives in main, torn down only on quit).
+Watchdog REJECTED: the GPU mode lets init complete, so an init-complete signal wouldn't detect the white screen.
 
-## Verification summary
-- 397/397 tests pass, eslint 0 errors.
-- Blink before/after: recent-panel render 80 ms → 7.4 ms; correctness asserted (cap/order/no-dupes).
+SHIPPED v3.3.106 (main.js — adversary's safe subset):
+- app.disableHardwareAcceleration() at module top (before app.whenReady) GATED on RDP (process.env.SESSIONNAME
+  matches /^RDP/) OR a persisted gpu-disabled.flag (in userData). Zero-regression for local/console users.
+- Auto-heal: on a GPU child-process-gone, write gpu-disabled.flag → next launch disables HW accel even if the
+  RDP gate missed (covers VM-via-console / bad virtual GPU). Self-healing after at most one white screen.
+- Kept the child-process-gone/render-process-gone/did-fail-load instrumentation to CONFIRM on the server log
+  (caveat: root cause is the standard RDP-GPU bet, not yet confirmed on the affected machine — next white-start
+  log shows CHILD PROCESS GONE type=GPU = confirmed).
+- (B) export-backup defaultPath: multi-hoster-backup-YYYY-MM-DD.mhu → DD-MM-YYYY-multihoster-backup.mhu.
+409 tests pass, clean boot (guard inert on non-RDP dev machine).
+
+DEFERRED (perf polish, workflow w5o2rpffx design ready): history JSONL + batch-start residual.
+
+---
+
+# v3.3.105 — URGENT data-safety: config write fsync + account-wipe guard
+
+User report: after a server CRASHED during upload (NOT the v3.3.104 update — the other server updated fine and
+kept its accounts), the accounts/credentials were gone. Root-cause chain (in code): config writes were atomic
+(tmp+rename) but had NO fsync — a hard crash can leave electron-config.json truncated/unflushed → on restart
+load() reads the corrupt/empty file, falls to .bak, and if that's also bad returns empty DEFAULTS → the next
+settings/queue save persists EMPTY hosters → accounts permanently wiped (and the async _atomicWrite blindly
+copyFileSync'd the live → .bak, so an empty live could clobber a good .bak).
+
+SHIPPED v3.3.105 (lib/config-store.js + main.js — data-safety, no behavior change):
+- fsync before rename in BOTH write paths: _atomicWrite (openSync+writeSync+fsyncSync+closeSync, then
+  guarded-.bak + rename) and main.js save-global-settings-sync (openSync+writeSync+fsyncSync+closeSync). A hard
+  crash can no longer leave a truncated config.
+- _atomicWrite .bak is now GUARDED: read the live file and only refresh .bak if it's non-trivial (trim>2) —
+  an empty/truncated live can never clobber a good .bak (matches what the sync-save already did).
+- WIPE-GUARD (_guardHosters): in save()/saveRotationCursors()/the sync-save, when the write does NOT
+  intentionally set hosters (config.hosters absent) AND the resulting hosters are all-empty, recover the
+  hosters from disk (_recoverHostersFromDisk tries live → .bak → .pre-history-split.bak) instead of persisting
+  the wipe. An EXPLICIT save({hosters:{}}) (user deleted all) is still allowed (hostersIntentional=true).
+- load() gained a 3rd fallback tier: .pre-history-split.bak (the permanent v3.3.99 snapshot with accounts) so
+  load() itself recovers after corruption.
+2 new tests (post-wipe valid-empty live + .bak → guard restores; explicit empty NOT blocked). 409 tests pass.
+RECOVERY for the affected server: %APPDATA%\multi-hoster-uploader\electron-config.json.pre-history-split.bak
+(or .bak) → copy over electron-config.json with the app closed.
+
+DEFERRED (perf polish, workflow w5o2rpffx designs ready): history JSONL (append-only, kills per-batch 185MB
+rewrite + first-open parse via loadHistoryRecent tail-read + meta sidecar) and the batch-start one-time
+render/231ms residual. Do these AFTER the data-safety fix is confirmed stable.
+
+---
+
+# v3.3.104 — virtualize the Recent-uploads panel (the last non-virtual table)
+
+v3.3.103 log (real 2464-job, 4-hoster batch → 95 concurrent): the statSync fix HELD (batch-start main spike
+336→231ms with 10× more jobs), and the whole 90s ramp to 95 active was PRISTINE (mean ~11ms, fps=32,
+longtasks=0). Residual: rapidly clicking tabs DURING the 95-active upload → renderer-longtask 210-221ms
+(proc=0ms = layout). Cause: the Recent-uploads panel (renderRecentUploadsPanel) rendered ALL sessionFilesData
+rows (≤2000) into the DOM non-virtualized — the exact analog of the History table pre-v3.3.102. Switching to
+that view laid out ~2000 rows.
+
+Workflow w23318hm0 hit transient 529 overload (no cached results); did the fix directly using the proven
+History-virtualization template + Playwright empirical verification (stronger than agent review for layout).
+
+SHIPPED v3.3.104 (renderer/app.js + styles.css):
+- Virtualized renderRecentUploadsPanel mirroring History/_renderVirtualRows: tbody#recentFilesBody gets only
+  ~visible rows + top/bottom spacer <tr> (VIRTUAL_ROW_HEIGHT=28, OVERSCAN=10). Scroll handler (_onRecentScroll
+  rAF-coalesced) + ResizeObserver on .recent-files-table-wrap (doubles as show-trigger). _recentWorking holds
+  the sorted set. DROPPED the insertAdjacentHTML append-only fast path (a ~40-row window re-render is cheap);
+  every render re-renders the visible window. Scroll-position preserved on prepend (date|desc: scrollTop=0 at
+  top, else += added*ROW_HEIGHT).
+- SELECTION SAFE: _buildRecentRowHtml already stamps `selected` from selectedRecentIds.has(row.order) per row,
+  so off-screen-selected rows render selected when scrolled in; selectedRecentIds stays the source of truth;
+  shift-select already uses _recentSortCache (not the DOM). applyRecentSelectionClasses toggling only visible
+  rows is correct.
+- styles.css: .recent-file-row { height: 28px } so the virtualization math is exact (table already had
+  table-layout:fixed, so no column-jump fix needed unlike History).
+- Empty-state guard: _renderRecentVirtualRows returns early when total=0 so it never wipes the "Noch keine
+  Uploads" message.
+- PLAYWRIGHT-VERIFIED @2000 rows (bounded container): show-cost 118ms→2.4ms, DOM stays 29-39 rows, scroll maps
+  correctly (row1500→window@1486), scrollHeight exact (56014≈56000), off-screen-selected renders with class,
+  row height exactly 28. 407 tests pass, clean boot.
+
+Every large table is now virtualized (Queue, History, Recent). DEFERRED still (one-time/minor): batch-start
+~500ms first-render + residual 231ms main spike for 2464 jobs (one-time per batch); first-get-history-after-
+batch parse-cache/JSONL.
+
+---
+
+# v3.3.103 — kill the batch-start 336ms main stall (synchronous statSync storm)
+
+v3.3.102 log (real 224-job batch): History virtualization CONFIRMED (no get-history on tab switch),
+steady-state pristine (fps=32, ELD 11.8ms). Residual = a ~6s BATCH-START spin-up burst: main ELD
+max=336ms @cpu=0%core + renderer-longtasks 196-391ms; settles to clean by +6s. Workflow w3bzkumo8
+(4 agents + adversarial verify) CORRECTED my hypothesis:
+- My "uncapped renderer progress-drain" theory was WRONG: handleProgress only mutates JS + SCHEDULES
+  coalesced renders (rAF/200ms); render is already one-per-frame; main coalesces to ~50 latest-per-job/100ms.
+  Chunking the drain fixes nothing. ADVERSARY FOUND IT WOULD REGRESS: rAF throttles to ~0 when the window is
+  minimized (the common background-uploader state) → unbounded _pBuf backlog AND deferred persistQueueStateSoon
+  (last line of _handleProgressImpl) → terminal 'done' lost on close = the queue-persistence-ghost-fix class.
+  DEFERRED/REJECTED as sketched.
+- REAL cause (cpu=0%core = blocked on I/O): synchronous fs.statSync storm in UploadManager.startBatch dedup
+  loop (lib/upload-manager.js:363-377): up to DEDUP_CHUNK=200 fs.statSync in ONE tick before yielding. 200 ×
+  ~1.68ms (measured on the VM) = the exact 336ms. Plus a per-job statSync (428). On a disk already saturated
+  by the 1MB read-ahead.
+
+SHIPPED v3.3.103 (lib/upload-manager.js — adversary's zero-risk headline fix, but the more thorough async form):
+- Dedup loop: dedup synchronously (cheap Map ops), then stat the unique files in PARALLEL via
+  `await Promise.all(toStat.map(f => fs.promises.stat(f)))` per chunk → stats run on the libuv threadpool,
+  main thread NEVER blocks. Preserves the exact results-Map shape {name,size,results:[]} + dedup semantics
+  (size=0 on failure). The 336ms sync block → 0 main-thread block.
+- Per-job statSync (428) → `await fs.promises.stat` (in an async fn before the first real await; cachedResult
+  fast-path already skips it for ~all jobs — consistency only).
+- Tests: updated the fs.statSync mocks in upload-manager.test.js (2 sites) + suspect-reject-alternates.test.js
+  to also mock fs.promises.stat (returns the same fake sizes). 407 tests pass, clean boot.
+
+The renderer-longtasks (391/280/299ms) during the burst were (medium-confidence) the user's OWN tab clicks
+landing while the main thread was stalled — fixing the main stall frees IPC so those clicks stay responsive.
+DEFERRED still (only if needed): first-get-history-after-batch parse-cache/JSONL; the renderer chunked drain
+ONLY if ever needed for interaction-responsiveness AND gated on a high-water-mark sync drain + a
+document.hidden setTimeout fallback (never rAF-only).
+
+---
+
+# v3.3.102 — virtualize the History table (the last tab-switch layout cost)
+
+v3.3.101's gate killed the get-history PARSE on tab switch, but the v3.3.101 log showed a RESIDUAL: tab
+clicks still 216ms with a ~197ms `renderer-longtask` and NO get-history (gate worked). proc=0ms → pure
+browser layout, not JS. Cause: `.view{display:none}`→`.active{display:flex}` + the History table builds up
+to 2000 `<tr>` NON-virtualized (renderHistoryTable), so showing the view lays out 2000 rows (~197ms on the
+RDP VM). The queue was already virtualized; history was the only non-virtual large table.
+
+MEASURED with Playwright (real DOM, this machine; VM ≈1.7×):
+- current 2000 rows auto-layout: 118ms ; content-visibility+fixed: 117ms (USELESS — rows still laid out)
+- cap 300: 16ms (but rejected: history rows are per-file×hoster, a single 1280-file batch ≈3840 rows, so a
+  small cap would HIDE a recent batch's links)
+- virtualize (40 visible of 2000): 2.3ms ✓
+Verified the virtualization end-to-end @6000 rows: showCost 1.1ms, DOM stays 32-42 rows, scroll maps
+correctly (top=row0/mid=row2990/bottom=row5999), scrollHeight exact, columns STABLE (table-layout:fixed),
+rows update on scroll.
+
+SHIPPED v3.3.102 (renderer/app.js + styles.css):
+- Virtualized renderHistoryTable mirroring the queue's _renderVirtualRows: header always rendered, tbody#historyBody
+  gets only visible rows + top/bottom spacer `<tr>` (VIRTUAL_ROW_HEIGHT=28, OVERSCAN=10). Scroll handler
+  (_onHistoryScroll, rAF-coalesced) + ResizeObserver on #historyContainer — the ResizeObserver doubles as the
+  show-trigger (hidden 0×0 container → visible size → re-render at correct height). Sort resets scrollTop=0 +
+  re-renders. Click delegation (copy-link / sort) unchanged. _historyWorking holds the sorted working set.
+- styles.css: `.history-table{table-layout:fixed}` + scoped col widths (16/34/12/38%) so columns don't jump as
+  rows scroll in/out (does NOT touch the shared .col-* used by the queue). Measured: content-visibility was a
+  no-op, so NOT used.
+All rows stay scrollable (no UX loss); show cost ~100× lower. 407 tests pass, clean boot. Playwright-verified.
+
+DEFERRED still (only if needed): the FIRST get-history after a new batch parses 185MB once (~450ms) — needs
+the ConfigStore parse-cache (+185MB RAM, guarded) or JSONL. appendHistory still rewrites 185MB per batch-done
+(JSONL fixes that). The ~625ms batch-start spin-up + 107ms debug-log residuals.
+
+---
+
+# v3.3.101 — History-tab lag: gate the unconditional reload + fix the diagnostics history regression
+
+v3.3.100's interaction instrument named the residual exactly: EVERY slow click was `button.tab`/`nav.tab-bar`
+(200–840ms), each coupled to `ipc get-history wall=150-200ms sync` + `main-longtask blocked=242-289ms
+lastIpc=get-history` + `renderer-longtask 200-248ms`. Uploads themselves pristine (ELD mean 11.7ms; the only
+spikes line up with the get-history tab-switches). Workflow wgxr06myb (4 agents + adversarial verify):
+- get-history fires ONLY entering the History tab (not every tab) — but the handler called loadHistory()
+  UNCONDITIONALLY (app.js:362-365) despite tracking `_historyDirty` and never checking it. Each call:
+  synchronous readFileSync+JSON.parse of the ~185MB / 30000-entry electron-history.json (no cache), ships all
+  30000 over IPC, renderer flattens ~120000 row objects then .slice(-2000) for the DOM (DOM already capped 2000).
+- Adversary safe subset = STEP 1 ALONE (gate the load, dirty-coverage verified complete: every append routes
+  batch-done→appendHistory + upload-batch-done→handleBatchDone sets _historyDirty=true). Zero risk.
+
+SHIPPED v3.3.101 (STEP 1 + a regression fix, both safe):
+- renderer/app.js: gate `if (tab.dataset.view==='history' && (_historyDirty || !_historyEverLoaded)) loadHistory()`;
+  added `_historyEverLoaded`, set both flags inside loadHistory() AFTER the await succeeds (retry on failure).
+  → REPEAT History tab-switches (no new uploads) now do ZERO ipc/parse/flatten = instant. (Honest limit: the
+  FIRST History open after a new batch still parses 185MB once ~450ms — needs the parse-cache, see below.)
+- lib/diagnostics-collectors.js + main.js: getHistory now reads loadHistory() not load().history — fixes a
+  CORRECTNESS regression I introduced in v3.3.99 (migrated mode → load().history is [] → remote diagnostics
+  reported totalBatches:0 despite 30000 real batches). Backward-compatible fallback kept. +2 regression tests.
+
+407 tests pass, clean boot.
+
+DEFERRED (adversary-flagged, by design — do only if the next log/user still shows pain):
+- STEP 2(1) ConfigStore parse-cache for history (mtime+size key, invalidate BOTH _writeHistoryFileAtomic AND
+  _writeHistoryFileDurable, slice-before-push for 'all'-retention same-ref aliasing). Makes first-after-upload
+  switch instant + appendHistory read-half free, but ADDS ~185MB resident in main (NOT a relocation — adversary
+  corrected the design's false RAM claim). 
+- STEP 2(2) slice get-history to last-N-batches: REGRESSION VECTOR (breaks browse/sort-all 30000), needs a
+  net-new paging/search-in-main IPC + UI that doesn't exist. Defer.
+- JSONL append-only storage: the ONLY thing that kills appendHistory's 185MB-rewrite-per-batch-done AND the
+  parse entirely (tail-readable). On-disk format migration → own careful build.
+- Two minor independent residuals from the sweep: ~625ms batch-start spin-up (synchronous 22-job build/prime
+  burst in one tick) + 107ms debug-log block mid-batch. Separate, low priority.
+
+---
+
+# v3.3.100 — close the LAST measurement gap: renderer interaction timing (switches/clicks)
+
+User asked "haben wir wirklich ALLES gemessen, auch switches/wechsel?". Audit: main-side was already
+fully covered (IPC wrapper ≥50ms on every handler, main-longtask >100ms with lastIpc, config instrument);
+account switchAccount is a trivial sync Map-set + the rotation work is async (can't block) → already covered.
+The REAL gap was RENDERER-side: renderer-perf was upload-gated (idle clicks unmeasured) and only aggregate
+(no per-interaction latency, no element attribution). Closed it (renderer/app.js, additive, self-silencing):
+- Event Timing API observer (`type:'event', durationThreshold:50, buffered`) → `renderer-interaction <type>
+  dur=Xms proc=Yms target=<el>` for EVERY UI interaction ≥50ms (switch/sort-header/tab/button), always-on,
+  names the element (id/class/data-action/aria-label). The direct "click→reaction" latency.
+- Idle renderer-longtask logging: any longtask ≥100ms logged immediately (`renderer-longtask dur=Xms`),
+  not just during uploads.
+405 tests pass, clean boot. Now EVERY action — main or renderer, idle or under load — names itself if slow.
+
+---
+
+# v3.3.99 — THE KILL: 38.5MB config-thrash → history split out of the hot config + full instrumentation
+
+THE ROOT CAUSE (from v3.3.98's instrument, the real "bread"): electron-config.json was **38.5MB** and got
+loaded/cloned/serialized **137× in 73s** on the main thread (140-592ms each) = **~47% main-thread occupancy**
+→ that IS the 1-2s button lag. The 1MB read-ahead was irrelevant against it. NOT the queue (`queue=undefined`
+was a LOGGING BUG: read `.length` on the pendingQueue OBJECT); the bulk is HISTORY — each batch-done appended
+the full per-file result list (`summary.files` w/ per-hoster URLs), 75 batches, default historyRetention='all'
+never prunes → unbounded. (5-agent workflow wz2g4bwka + adversarial verify; bench fixture confirmed 185MB =
+100MB history/30000 entries.)
+
+Why writes drove the storm: save-global-settings (queue-persist) did 2 loads + 1 serialize per call, and
+_atomicWrite NULLS the cache → next load is a full 38.5MB reparse. Even cache HITS structuredCloned 38.5MB.
+Per-job upload path makes ZERO config calls (selectUploadAuth/rotation take config by param) — pending=1280
+is NOT the driver.
+
+THE FIX (history split — kills clone AND serialize AND reparse at once; advisor-gated, adversarially verified):
+- History moved to its OWN file **electron-history.json** (lib/config-store.js). _migrateHistory() runs ONCE
+  at init (packaged only), fail-safe: write history.json + fsync + verify count BEFORE the config is ever
+  allowed to drop history, keep a permanent `electron-config.json.pre-history-split.bak`. _loadImpl returns
+  `history:[]` when migrated → cached result is tiny → clones cheap; config file shrinks to ~KB on the first
+  save() → reparse cheap; _serializeForDisk writes ~KB → serialize cheap. loadHistory/appendHistory/
+  pruneHistory/clearHistory redirected to history.json (own write-queue, no-clobber guard); legacy config
+  path kept as fallback when migration fails. get-history/export-history go through loadHistory.
+- REAL 194MB-FIXTURE VALIDATION: migrate 1.5s (1×), all 30000 entries preserved + .bak; load() 631ms cold
+  (1×) → **0.1ms** after strip; save() strips config **185MB→2.1KB**; loadHistory() still 30000. RESULT:
+  data-preserved=true, hotpath-fast=true.
+- DROPPED per advisor (one-variable + risk): loadShallow (moot after split), Fix#2 cache-repopulate (dead
+  gate), Fix#4 resolution-cache (stale-cache → rotation/byse failover-regression class — the one thing that
+  could SILENTLY corrupt uploads). Fix#3 (this split) was the only complete fix.
+
+"MEASURE EVERYTHING" instrumentation (user demand) — all additive, threshold-gated, MHU_PERF=0 to disable:
+- IPC handler wrapper (monkey-patch ipcMain.handle/.on) → `ipc <channel> wall=Xms sync=Yms` ≥50ms = the
+  button-press→response latency, hardened so a logging throw can never break IPC (Promise.resolve(p).finally).
+- Main-process long-task drift monitor (setInterval 100ms) → `main-longtask blocked=Xms lastIpc=… gc=… gcMax=…`
+  for any single main-thread turn >100ms (catches GC, fs scans, serialize the IPC wrapper structurally can't see).
+- config-store: caller attribution `via=<stack>` + `wqDepth=` on config-load/config-serialize lines; FIXED the
+  `queue=` logging bug (now reads pendingQueue.queueJobs.length).
+
+405 tests pass (9 new migration tests covering preserve-count, round-trip, save()-never-loses-history,
+crash-window fallback, idempotency). Clean Electron boot (9s, no errors). No repo pollution (migration packaged-only).
+NEXT LOG must show: config-load/config-serialize wall= drop to single digits (or vanish), main-longtask rare,
+ipc lines name any residual. If a residual remains it's pendingQueue (own follow-up, not a regression).
+
+---
+
+# v3.3.98 — read-burst absorption (1MB hwm) + persist/load instrument; B (renderer) DEFERRED
+
+v3.3.97 (threadpool 64→8) was a DECISIVE win: mean ELD 200ms→~11ms at 70 active (18×), renderer healthy
+14/15 windows. User: "ganz flüssig isses noch nicht". A 5-agent ultracode workflow + adversarial verify
+localized the RESIDUAL to TWO distinct, measured spike sources (full data: subagents output wjskjo1xk):
+
+1. READ-BURSTS (tail W13/14/15, 15:18:53-19:04): FSReqCallback 66/70/46 vs threadpool=8 (~8.75× queue
+   depth), SimpleWriteWrap collapses to 7/4/24, mean climbs 12.9→30.3→41.9ms. GC EXCLUDED (gcMax ≤27ms
+   always). The FSReq↔SimpleWrite inversion at stable active=70/pending=1287 proves reads are CAUSAL, not
+   a symptom of a block elsewhere.
+2. SYNC CONFIG PERSIST (suspected): save()→load() reparses the WHOLE electron-config.json (1287-job
+   pendingQueue nested in globalSettings + full history) on every persist because _atomicWrite nulls the
+   cache; _serializeForDisk JSON.stringify(...,null,2) of all of it. W13's single 1021ms max with heap→142MB
+   fits a big synchronous structuredClone+stringify. CAVEAT (advisor): W13 is ONE confounded sample (also
+   FSReq=66) and the ONLY heap-spike window; W4(415ms,heap41) & W10(852ms,heap18) are LOW-heap → NOT persist
+   clones → likely the SECONDARY suspect: account-failed's synchronous configStore.load() per failure near
+   connection churn (W6 teardown had doodstream connect-timeouts). So: INSTRUMENT, don't claim "found a 1s
+   freeze".
+
+SHIPPED v3.3.98 (one-variable discipline — advisor cut B to keep the next measurement clean):
+- A: highWaterMark 256KB→1MB in all 5 streaming read loops (hosters.js:291, doodstream:342, voe:245,
+  vidmoly:190 CHUNK_SIZE consts; clouddrop:108 inline — NOT clouddrop:12's 16MB server chunk). Keep tp=8.
+  Deepens per-stream read-ahead 0.43s→~1.7s (absorbs threadpool-queue latency so writes don't starve),
+  4× fewer read completions + allocs. Zero multipart byte-risk (Content-Length=preamble+fileSize+epilogue,
+  independent of chunk size). REVERSIBLE PROBE; read-semaphore held in reserve (trigger: FSReq still ~70 +
+  writes starved + mean elevated after 1MB).
+- C-instrument (BROADENED per advisor): config-store.js times load() (full reparse, incl. account-failed
+  path) AND _commit serialize; logs `config-load wall=Xms cache=hit/miss hist=N queue=M` and
+  `config-serialize wall=Xms bytes=Y hist=N queue=M` when ≥20ms (perfLog hook set in main.js via
+  configStore.setPerfLog→logInfo). load() split into wrapper + _loadImpl. 397 tests pass.
+- B (renderer chunked rAF batch drain, app.js:188-193 — the 243ms longtask at W14) DEFERRED: renderer was
+  healthy 14/15 windows and the one longtask is DOWNSTREAM of the main-thread read-burst flooding IPC.
+  Fix A should make it self-heal. Bundling B would confound attribution + touches the progress hot path
+  that bit before (formatDateTime burst, ghost-fix). Add B next round ONLY if renderer still janks after A.
+
+NEXT LOG answers 3 things cleanly: (1) did A kill the read-bursts (FSReq per-window + tail mean drop)?
+(2) is the persist/load actually heavy (new config-load/config-serialize lines + their wall/queue/hist)?
+(3) did the renderer self-heal from A alone (longtasks back to 0)? Then decide: persist refactor for v3.3.99
+(queue-out-of-config OR cache-repopulation — latter lower-risk but renderer's incoming globalSettings isn't
+default-merged like load() produces, so confirm merge-equivalence first), and/or B, and/or read-semaphore.
+
+---
+
+# v3.3.97 — DECISIVE ELD finding: file-read phase-flip + threadpool 64→8 + GC instrument
+
+The v3.3.96 `eventloop-delay` logs gave the decisive signal. At CONSTANT active-count, the system flips
+between two regimes:
+- HEALTHY (ELD ~11ms, rss 268–308MB): `SimpleWriteWrap ≈ active`, `FSReqCallback ≈ 0–1` (write/network-bound)
+- BLOCKED (ELD 49–217ms, rss 540–610MB): `FSReqCallback ≈ active` (62–71 file reads in flight), `SimpleWriteWrap ≈ 0–4`
+ELD spike + rss balloon both track `FSReqCallback` → file-read path through the libuv threadpool, NOT crypto,
+NOT renderer, NOT GC-alone. All 5 uploaders read identically (256KB createReadStream); byse/dood/voe run
+through the GENERIC uploadFile in hosters.js (no dedicated module).
+
+Advisor caveats baked into the build (do NOT skip on re-measure):
+1. Causation UNPROVEN — high FSReqCallback could be a SYMPTOM (blocked loop can't drain read-completions).
+2. rss math kills "read buffers ballooned": 70×256KB ≈ 18MB, but rss swings ~300MB → heap/object churn (GC).
+3. Cheapest discriminator already wired: `UV_THREADPOOL_SIZE` 64→8 (1 line, reversible, NOT an upload cap;
+   8×256KB reads ≈ 100MB/s ≫ 41MB/s aggregate). Suspect tp=64 made it WORSE (removed read-serialization).
+
+Shipped v3.3.97 = candidate-fix + discriminator in one build:
+- main.js:1 `UV_THREADPOOL_SIZE` 64→8.
+- ELD line now also logs `heap=`(heapUsed) `ext=`(external) `ab=`(arrayBuffers) `gc=`/`gcTotal=`/`gcMax=`ms
+  (PerformanceObserver entryTypes:['gc'], reset per window).
+
+DECISION RULE for the next user log:
+- ELD drops with tp=8 → read over-parallelism confirmed → keep 8 or productionize a DEDICATED read-semaphore.
+- ELD high + gcTotal/gcMax align with spikes → heap churn → hunt the allocator (semaphore would be wasted).
+- ELD high + gc flat → causation reversed (symptom) → pivot.
+WAIT for the next `eventloop-delay` log before any read-path refactor. NO upload cap (user rejected it).
+
+---
+
+# v3.3.94 — comprehensive measurement build (user: "mach alles messen was man messen kann")
+
+Localization so far (each step EMPIRICAL, not by elimination — advisor caught the elimination-leap):
+- Renderer queue render PROVEN cheap: loaded the REAL app.js in headless Chromium (Playwright) with a mocked
+  window.api, populated Q=1000 / 61 active / progress sort, drove the real onUploadProgressBatch +
+  renderQueueTable + scroll → ALL <0.5ms. (Caveat: component cost, not frame rate.)
+- User CONFIRMED the discriminator: a full 1000-row queue scrolls SMOOTH when idle, ruckelt ONLY while ~61–70
+  uploads are active → the lag is driven by the active uploads (main-process / system load), not the table.
+- Screenshot: 70 connections, 1413 files, 41.3 MB/s, "write ECONNRESET". ECONNRESET is already classified
+  transient (upload-manager _isTransientNetworkError line 171 → retried, not account-fatal) — it's the
+  SIGNATURE of oversubscription (servers RST the excess connections). Same root cause as the lag.
+
+Immediate user lever (already exists): Settings → Uploads → "Globale parallele Uploads" (parallelUploadCount,
+global semaphore, default 0=off). Capping total concurrent uploads (~20) should fix lag AND ECONNRESET AND
+likely keep throughput (bandwidth-limited at 41 MB/s; reset connections waste bandwidth on retries).
+
+SHIPPED measurement (all additive, zero upload-behavior change) to pinpoint CPU-vs-IO vs renderer from the
+user's REAL 70-connection run:
+- main.js ELD line now also logs: cpu=X%core (process.cpuUsage delta / wall, >100% = multi-core),
+  rss=YMB, active-by-hoster={dood:.., voe:.., ...} (per-hoster live connection distribution → shows which
+  hoster is oversubscribed), transient-errs=N (cumulative ECONNRESET-class on the primary path), pending=M.
+- lib/upload-manager.js: getDiagnostics() {activeByHoster, transientErrors, pending, active}; activeEntry
+  now carries hoster; _transientErrorTotal++ in the primary catch when _isTransientNetworkError.
+- renderer/app.js: PerformanceObserver('longtask') + a rAF frame-time monitor → logs every 5s WHILE
+  uploading: `renderer-perf active=N fps=X jankFrames=Y worstFrame=Zms longtasks=W maxTask=Vms`. This is the
+  DIRECT renderer ground truth (the component-timing harness couldn't capture real frame rate). Low fps /
+  high jankFrames / longtasks → renderer IS blocked; ~60fps + no jank while it still feels laggy → it's the
+  main-process/system, and the cpu=/eld= numbers in the same log say CPU-bound (→ workers/cap) vs IO-bound.
+Both logs land in the normal debug log (logInfo / window.api.debugLog). 397/397 tests, eslint clean.
+
+NEXT: user runs the 70-load on v3.3.94, shares the `eventloop-delay` + `renderer-perf` log lines (or connects
+diagnostics). Those two lines together localize it definitively. Do NOT build workers/cap before that.
+
+---
+
+# v3.3.93 — THE renderer lag knot FOUND + FIXED + MEASURED: formatDateTime per progress event
+
+User gave the decisive data: "25 connections okay, 50+61 laggt, EVTL wenn die uploadenden Zeilen nicht im
+Bild sind." Two regime facts (asked, not assumed — advisor caught the assume-the-regime trap a 3rd time):
+queue = 200–1000 rows (VIRTUAL mode) + sort = clicked PROGRESS/SPEED (dynamic). This killed the non-virtual
+reflow theory (off-screen rows aren't in the DOM when virtual) AND pointed at the per-event path.
+
+ROOT CAUSE (renderer process, NOT main — the v3.3.91 ELD log can't see this): `maybeAddSessionFile(job)`
+computed `const dt = formatDateTime(new Date())` UNCONDITIONALLY at the top, before the `status==='done'`
+check that early-returns for everything else. formatDateTime does TWO Intl locale formats
+(toLocaleDateString + toLocaleTimeString) = ~83µs/call MEASURED. It runs on EVERY progress event
+(onUploadProgressBatch loops the M-item batch → handleProgress → _handleProgressImpl → maybeAddSessionFile),
+i.e. 10×M/sec, and THROWS IT AWAY for all non-done events (the overwhelming majority while uploading).
+- Scales exactly with M (active count): 250/sec at M=25 → 610/sec at M=61.
+- Bursts: each progress batch runs M calls back-to-back = a SYNCHRONOUS main-thread block of
+  ~2.4ms (M=25) → ~5ms (M=61) every 100ms, on top of render+sort → blows the 16ms frame budget → scroll
+  stutter. Scroll-independent (per-event, not per-render) → matches "lag when actives off-screen" exactly.
+  This is the 25→50 cliff.
+
+FIX: move `const dt = formatDateTime(new Date())` inside the `if (!_sessionFileKeys.has(dedupKey))` block, so
+it runs ONCE per genuinely-new completed upload, never per progress tick.
+
+VERIFIED (faithful Blink benchmark at the CONFIRMED regime: Q=500 virtual, dynamic progress sort, scrolling,
+M=25/50/61, OLD vs FIXED): per-batch cost 1.7/3.2/4.1 ms (OLD, scales with M) → 0.0/0.0/0.0 ms (FIXED, flat).
+Frame P95 7.3→4.2 ms at M=61. M-scaling ELIMINATED. The render/scroll path itself is flat ~2.5ms median
+across all M → NO second knot there. updateStatusBar/StatsPanel = one cached O(Q) arithmetic pass (cheap);
+updateQueueActionButtons = O(selection) (cheap). No other Intl/Date on any per-event/per-frame hot path
+(2582 = job-log modal, 4587 = History view — both on-demand/cold). 397/397 tests pass, eslint clean.
+
+NOTE: the v3.3.91/92 main-process event-loop-delay instrument is for the OTHER (CPU-vs-IO) hypothesis and is
+a separate process — keep it; it still answers whether the main thread also saturates at 50+ TLS streams.
+
+---
+
+# High-concurrency lag audit (v3.3.90) — "lag ist immernoch da, ich vermute ab X gleichzeitig muss er alle Zeilen gebündelt updaten"
+
+Method: 44-agent high-concurrency audit of the full upload→IPC→render path + Blink benchmark of the
+renderer queue table (Playwright/Chromium = same Blink engine), targeting the user's NEW hypothesis:
+"with ~100 concurrent uploads the renderer has to update ALL rows bundled rather than cleanly per-row."
+
+## The user's hypothesis is MEASURED-REFUTED — the renderer is NOT the bottleneck.
+Blink benchmark over scenarios Q=150..1000, M=10 active, 60 ticks each:
+- renderQueueTable virtualizes at ≥200 rows; <200 = change-detecting in-place update.
+- _updateRowInPlace is change-detecting (no forced reflow, no layout reads).
+- median render <1 ms at Q=1000; only ~4/60 renders are full rebuilds even with progress-crossing sorts.
+- progress is coalesced main-side (_progressByJob Map keyed by jobId + 100ms flush → one batch sized by
+  active-job count, ~10/sec); renderer iterates the batch with cheap per-row handleProgress.
+DOM amplification is ruled out by measurement. "Laggy at ~40% CPU / 8 cores" = ONE core at 100% =
+main-thread saturation / synchronous blocking, not DOM.
+
+## SHIPPED (v3.3.90) — the two real main-thread blockers, both behavior-preserving
+1. lib/clouddrop-upload.js `_uploadChunked`: was reading each 16 MB chunk with `fs.readSync` SYNCHRONOUSLY
+   on the main event loop — unique among the 5 uploaders (the other 4 stream async). Each read blocks the
+   WHOLE loop (~5–9 ms SSD, 30–100 ms slow disk) → freezes all progress/IPC/render/other-uploads, scaling
+   with the number of concurrent clouddrop uploads. Fits "laggy when uploading, worse with more concurrent."
+   User uses clouddrop. Fix: `fs.openSync`/`readSync`/`closeSync` → `fs.promises.open` + `await fh.read` +
+   `await fh.close()`. Byte-equivalence verified by SHA-256 over all chunk-boundary cases (full chunk,
+   partial last chunk, 2/3/4-chunk, single byte) before shipping — a chunk-read bug = corrupt upload.
+2. lib/upload-manager.js rotation-retry (944) + suspect-alternate (1075) progressCb: both called
+   `_emitProgress` (a synchronous `emit('progress')` + fresh object spread) on EVERY stream chunk
+   (hundreds/sec per job) — they were missing the 250 ms `lastEmitTime` gate that the primary path (631)
+   has. With many concurrent uploads in rotation/suspect mode that's real main-thread emit amplification.
+   Mirrored the gate exactly: activeEntry mutation stays UNGATED (stats/speed-monitor stay fresh), only the
+   emit is throttled to 4/sec. Behavior-preserving.
+397/397 tests pass, eslint clean (1 pre-existing unrelated warning at line 554).
+
+## DROPPED (advisor: measured fine, don't chase perception)
+- Lowering the virtual-row threshold below 200: the Blink benchmark shows <200 in-place updates are already
+  sub-ms; no change warranted.
+
+## DISCRIMINATOR ANSWERED (user, 2026-06-21)
+(a) Lag NOT clouddrop-specific — other hosters. (b) Parallel counts RAISED deliberately (10+).
+(c) 50+ uploading SIMULTANEOUSLY active. → This is the TRUE high-concurrency main-thread-funnel branch,
+NOT clouddrop. v3.3.90 stands but does not target this user's case.
+
+## v3.3.91 — instrument first, don't refactor the upload core off elimination-reasoning
+Advisor reframe: two LIVE hypotheses need OPPOSITE fixes — (A) main thread CPU-blocked (TLS/crypto/sync) →
+event loop stalls → a cap/workers help; (B) main thread fine but IO-STARVED (libuv threadpool/sockets) →
+loop stays responsive, uploads just queue → workers are WASTED, config fixes it. A worker/child-process
+upload refactor touches throttle/rotation/abort/progress/credentials and is hard to reverse — DO NOT ship it
+off sandbox elimination. One measurement splits the hypotheses and must run in the REAL app.
+
+SHIPPED (both reversible, zero upload-core refactor):
+1. main.js: `perf_hooks.monitorEventLoopDelay({resolution:10})` enabled at startup; logged via logInfo every
+   ~5 s WHILE uploading (state==='uploading' && activeJobs>0) as
+   `eventloop-delay active=N mean=..ms p99=..ms max=..ms stddev=..ms threadpool=..`. Pure numbers, no secret
+   → does NOT touch the redaction surface. This is the GROUND TRUTH: high mean/p99 → CPU-blocking → workers
+   justified; low delay while uploads stall → IO-bound → workers wasted, threadpool/sockets is the fix.
+2. main.js (first statement, before require('electron')): `UV_THREADPOOL_SIZE = env || '64'`. Default is 4;
+   every async uploader feeds undici from fs.createReadStream (+ clouddrop fh.read) and DNS getaddrinfo goes
+   through the same pool → 50 concurrent vs 4 threads = reads/DNS serialize 4-at-a-time = a hard cliff at a
+   small connection count = the "ab X connections" symptom. Threads are created lazily on demand → 64-max
+   costs nothing if unused (zero-risk, reversible). The advisor's prescribed one-env-var hypothesis test.
+
+CAVEAT (honest): synthetic sandbox benches could NOT confirm the threadpool is the bottleneck — pbkdf2 is
+CPU-core-bound (masks pool size); DNS .invalid returns instantly; real-RTT DNS showed NO pool benefit because
+WINDOWS serializes getaddrinfo via the OS DNS Client service (so on Windows the DNS half of the cliff is
+masked by the resolver, though the fs-read half still benefits). This is exactly why the ELD number must come
+from the user's real load, not the sandbox. Per-uploader undici Agent audit: clouddrop has a shared
+module-level Agent (connections:50); doodstream/voe/vidmoly use the global dispatcher (pooled per origin, NO
+per-call agent explosion) — so no agent fix needed.
+
+## v3.3.92 — make the single measurement decisive + breadth audit of un-checked main.js hot paths
+Enriched the ELD log line with `process.getActiveResourcesInfo()` as a compact type-histogram:
+`eventloop-delay active=N mean/p99/max/stddev ms threadpool=64 resources=K {TCPSocketWrap:50,FSReqCallback:4,...}`.
+Now ONE run splits all three readings in a single line: high mean/p99 → CPU-blocked (workers/cap);
+low delay + many TCP/FS/GetAddrInfo resources → IO-bound queueing (threadpool/sockets, NOT workers);
+low delay + few resources → not saturated (lag elsewhere / perception). Pure numbers, no redaction surface.
+
+Breadth audit this round (4th /goal re-fire, code I wrote, NOT re-measuring cleared render/persist):
+- main.js logging (debug/rot/upload): all buffered + ASYNC fs.appendFile (write-guard flag, 500ms timer,
+  setImmediate re-flush). Sync appendFileSync ONLY in crash/signal/exit handlers (correct there). CLEAN.
+- main.js progress coalescing (_progressByJob Map + 100ms batch → one upload-progress-batch via safeSend):
+  non-terminal = Map.set (keeps latest/job); gated upstream to 4/sec/job. CLEAN at N=50.
+- _appendJobLog: capped in-memory ring buffer (Map, FIFO-evict). CLEAN.
+- All 5 uploaders: doodstream/voe/vidmoly/clouddrop-simple stream via async createReadStream + for-await +
+  async throttle.consume; clouddrop-chunked now async fh.read. NONE block the main loop per chunk. CLEAN
+  (clouddrop's old readSync was the unique outlier, fixed v3.3.90).
+
+## NEXT (gated on the real-app ELD number + user's explicit nod)
+User runs their 50-concurrent load once; the enriched `eventloop-delay` log line decides:
+- mean/p99 HIGH (tens–hundreds ms) → CPU-blocked → propose worker_threads/child-process upload pool OR a
+  smart concurrency cap (WITH the user's nod — it's hard to reverse and touches credentials/abort/rotation).
+- delay LOW while it still lags → IO-bound → threadpool bump already addresses it; if not, look at socket
+  caps / undici Agent connection limits / per-origin pooling, NOT workers.
+Do NOT build the worker refactor before this number exists.

tests/config-store.test.js

@@ -17,6 +17,7 @@ function createStore() {
   // We override by setting filePath directly
   store = new ConfigStore(fakeApp);
   store.filePath = path.join(tmpDir, 'electron-config.json');
+  store.historyPath = path.join(tmpDir, 'electron-history.json');
   return store;
 }
 
@@ -292,4 +293,117 @@ describe('ConfigStore', () => {
     const config = store.load();
     assert.equal(config.hosters['doodstream.com'][0].apiKey, 'from-backup');
   });
+
+  it('wipe-guard: a settings-only save recovers accounts from .bak when the live config validly has none', async () => {
+    // Post-wipe state: live config parses fine but has empty hosters; a backup still holds the accounts.
+    fs.writeFileSync(store.filePath, JSON.stringify({ hosters: {}, hosterSettings: {}, globalSettings: {}, history: [] }), 'utf-8');
+    fs.writeFileSync(store.filePath + '.bak', JSON.stringify({
+      hosters: { 'voe.sx': [{ id: 'v1', authType: 'api', apiKey: 'survive-key' }] },
+      hosterSettings: {}, globalSettings: {}, history: []
+    }), 'utf-8');
+    await store.save({ globalSettings: { alwaysOnTop: true } });
+    const cfg = store.load();
+    assert.ok(cfg.hosters['voe.sx'] && cfg.hosters['voe.sx'].length === 1, 'guard must restore accounts from .bak, not persist the wipe');
+    assert.equal(cfg.hosters['voe.sx'][0].apiKey, 'survive-key');
+    assert.equal(cfg.globalSettings.alwaysOnTop, true);
+  });
+
+  it('wipe-guard: an explicit save({hosters:{}}) (user deleted all) is NOT blocked', async () => {
+    await store.save({ hosters: { 'doodstream.com': [{ id: 'd1', authType: 'api', apiKey: 'k' }] } });
+    await store.save({ hosters: {} });
+    const cfg = store.load();
+    assert.equal((cfg.hosters['doodstream.com'] || []).length, 0, 'an intentional hosters write must be allowed to empty them');
+  });
+});
+
+describe('ConfigStore history split (electron-history.json)', () => {
+  let dir;
+  let s;
+
+  function makeStore() {
+    const st = new ConfigStore({ isPackaged: false, getPath: () => dir });
+    st.filePath = path.join(dir, 'electron-config.json');
+    st.historyPath = path.join(dir, 'electron-history.json');
+    return st;
+  }
+
+  function writeConfigWithHistory(n) {
+    const history = [];
+    for (let i = 0; i < n; i++) history.push({ id: `batch-${i}`, timestamp: 1750000000000 + i, total: 3, files: [{ name: `f${i}.mkv` }] });
+    fs.writeFileSync(path.join(dir, 'electron-config.json'), JSON.stringify({
+      hosters: { 'byse.sx': [{ id: 'a1', authType: 'api', apiKey: 'k' }] },
+      hosterSettings: {}, globalSettings: { historyRetention: 'all' }, history
+    }), 'utf-8');
+  }
+
+  beforeEach(() => { dir = fs.mkdtempSync(path.join(os.tmpdir(), 'cfg-hist-')); s = makeStore(); });
+  afterEach(() => { fs.rmSync(dir, { recursive: true, force: true }); });
+
+  it('migration moves history into electron-history.json, preserving every entry', () => {
+    writeConfigWithHistory(50);
+    s._migrateHistory();
+    assert.equal(s._historyMigrated, true);
+    assert.ok(fs.existsSync(s.historyPath));
+    const hist = JSON.parse(fs.readFileSync(s.historyPath, 'utf-8'));
+    assert.equal(hist.length, 50);
+    assert.equal(hist[0].id, 'batch-0');
+    assert.equal(hist[49].id, 'batch-49');
+    assert.ok(fs.existsSync(s.filePath + '.pre-history-split.bak'), 'a permanent pre-split backup is kept');
+  });
+
+  it('after migration load() excludes history (cheap hot path) but loadHistory() returns the real data', () => {
+    writeConfigWithHistory(30);
+    s._migrateHistory();
+    assert.deepEqual(s.load().history, [], 'history is not carried in the always-loaded config');
+    assert.equal(s.loadHistory().length, 30);
+  });
+
+  it('appendHistory writes to history.json; the next config write strips stale history from the config file', async () => {
+    writeConfigWithHistory(10);
+    s._migrateHistory();
+    await s.appendHistory({ id: 'new-batch', timestamp: 1750000099999, total: 1, files: [{ name: 'x.mkv' }] });
+    assert.equal(s.loadHistory().length, 11, 'append goes to history.json');
+    await s.save({ globalSettings: { alwaysOnTop: true } });
+    const onDisk = JSON.parse(fs.readFileSync(s.filePath, 'utf-8'));
+    assert.ok(!onDisk.history || onDisk.history.length === 0, 'a config write strips stale history from the config file');
+    assert.equal(s.loadHistory().length, 11, 'history.json is unaffected by the config write');
+  });
+
+  it('save({globalSettings}) after migration NEVER loses history (data-loss invariant)', async () => {
+    writeConfigWithHistory(40);
+    s._migrateHistory();
+    await s.save({ globalSettings: { alwaysOnTop: true } });
+    assert.equal(s.loadHistory().length, 40, 'a settings write must not touch history');
+    assert.equal(s.load().globalSettings.alwaysOnTop, true);
+  });
+
+  it('clearHistory empties history.json only', async () => {
+    writeConfigWithHistory(20);
+    s._migrateHistory();
+    await s.clearHistory();
+    assert.equal(s.loadHistory().length, 0);
+  });
+
+  it('migration is idempotent — re-running with history.json present does not re-derive or clobber', () => {
+    writeConfigWithHistory(15);
+    s._migrateHistory();
+    const after = makeStore();
+    after._migrateHistory();
+    assert.equal(after._historyMigrated, true);
+    assert.equal(after.loadHistory().length, 15);
+  });
+
+  it('crash-window fallback: not migrated + no history.json → loadHistory reads config.history', () => {
+    writeConfigWithHistory(7);
+    assert.equal(s._historyMigrated, false);
+    assert.equal(s.loadHistory().length, 7, 'legacy path still serves history if migration never ran');
+  });
+
+  it('pruneHistory trims history.json and persists the retention setting', async () => {
+    writeConfigWithHistory(12);
+    s._migrateHistory();
+    const res = await s.pruneHistory('all', { dryRun: false });
+    assert.equal(s.loadHistory().length, 12);
+    assert.ok(res.keptBatches === 12);
+  });
 });

tests/diagnostics-collectors.test.js

@@ -53,6 +53,32 @@ test('getConfigRedacted strips password/apiKey/token/webhookUrl and value-scrubs
   assert.ok(!json.includes('WBHOOKSECRETTOKEN'), 'webhook secret must be redacted');
 });
 
+test('getHistory reads loadHistory (migrated mode: loadConfig().history is empty)', () => {
+  const c = createCollectors({
+    loadConfig: () => ({ hosters: {}, globalSettings: {}, history: [] }),
+    loadHistory: () => [
+      { timestamp: '2026-01-01T00:00:00.000Z', files: [{ name: 'a.mkv', results: [{ hoster: 'voe.sx', status: 'done', url: 'https://voe.sx/a' }] }] },
+      { timestamp: '2026-01-02T00:00:00.000Z', files: [{ name: 'b.mkv', results: [{ hoster: 'byse.sx', status: 'done', url: 'https://byse.sx/b' }] }] }
+    ],
+    getAllLogPaths: () => ({ logDir: os.tmpdir() }),
+    support, stats,
+    appInfo: () => ({}), systemInfo: () => ({}), agentInfo: () => ({})
+  });
+  const out = c.getHistory({ limit: 10 });
+  assert.equal(out.totalBatches, 2, 'must report real history from loadHistory, not the empty load().history');
+  assert.equal(out.returned, 2);
+});
+
+test('getHistory falls back to loadConfig().history when loadHistory is absent (legacy mode)', () => {
+  const c = createCollectors({
+    loadConfig: () => ({ hosters: {}, globalSettings: {}, history: [{ timestamp: '2026-01-01T00:00:00.000Z', files: [] }] }),
+    getAllLogPaths: () => ({ logDir: os.tmpdir() }),
+    support, stats,
+    appInfo: () => ({}), systemInfo: () => ({}), agentInfo: () => ({})
+  });
+  assert.equal(c.getHistory({ limit: 10 }).totalBatches, 1, 'legacy path reads load().history when loadHistory not injected');
+});
+
 test('readLog redacts a planted token and a Bearer line; doodstream is NOT readable; unknown name rejected', () => {
   const { collectors } = makeFixture();
   const dbg = collectors.readLog({ name: 'debug', tailKb: 64 });

tests/log-mode.test.js

@@ -57,13 +57,23 @@ test('resolveLogFileName: daily mode → fileuploader-YYYY-MM-DD.log', () => {
   );
 });
 
-test('resolveLogFileName: session mode → fileuploader-session-<id>.log', () => {
+test('resolveLogFileName: session mode → <sessionId>.log (baseName ignored)', () => {
   assert.equal(
-    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'session', sessionId: '2026-05-28_22-44-52-12345' }),
-    'fileuploader-session-2026-05-28_22-44-52-12345.log'
+    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'session', sessionId: '26-05-2026-mdu-session-22-44' }),
+    '26-05-2026-mdu-session-22-44.log'
   );
 });
 
+test('formatSessionStamp: DD-MM-YYYY-mdu-session-HH-MM', () => {
+  const { formatSessionStamp } = require('../lib/log-mode');
+  assert.equal(formatSessionStamp(new Date(2026, 5, 26, 6, 2, 36)), '26-06-2026-mdu-session-06-02');
+});
+
+test('formatSessionStamp: appends a 6-digit suffix when a rand is supplied', () => {
+  assert.equal(formatSessionStamp(new Date(2026, 5, 26, 6, 2, 36), '847581'), '26-06-2026-mdu-session-06-02-847581');
+  assert.equal(formatSessionStamp(new Date(2026, 5, 26, 6, 2, 36), 847581), '26-06-2026-mdu-session-06-02-847581');
+});
+
 test('resolveLogFileName: session mode with missing sessionId falls back to single (never emits malformed name)', () => {
   assert.equal(
     resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'session' }),
@@ -102,12 +112,17 @@ test('stripModeStampFromFileName: strips a session-stamp suffix (with and withou
   );
 });
 
+test('stripModeStampFromFileName: new DD-MM-YYYY-mdu-session-HH-MM resets to the default base', () => {
+  assert.equal(stripModeStampFromFileName('26-06-2026-mdu-session-06-02.log'), 'fileuploader.log');
+  assert.equal(stripModeStampFromFileName('26-06-2026-mdu-session-06-02-847581.log'), 'fileuploader.log');
+});
+
 test('regression: resolveLogFileName(stripModeStampFromFileName(...)) is idempotent — persisting then re-resolving never compounds stamps', () => {
   // This is the exact bug shape: persist the resolved path, then on next call
   // re-resolve from the saved base — must produce the same file, not a doubled
   // session-stamped one. The fix is the strip; this test guards against
   // regressing _persistFallbackLogPath into the 3.3.35 bug.
-  const sessionId = '2026-06-03_18-16-20-8132';
+  const sessionId = '03-06-2026-mdu-session-18-16';
   const dailyDate = new Date(2026, 5, 3);
   for (const mode of ['daily', 'session']) {
     const date = mode === 'daily' ? dailyDate : new Date();
@@ -129,12 +144,7 @@ test('formatDateStamp: zero-pads month and day', () => {
   assert.equal(formatDateStamp(new Date(2026, 11, 31)), '2026-12-31');
 });
 
-test('formatSessionStamp: produces YYYY-MM-DD_HH-MM-SS-pid', () => {
-  const d = new Date(2026, 4, 28, 7, 9, 5);
-  assert.equal(formatSessionStamp(d, 12345), '2026-05-28_07-09-05-12345');
-});
-
-test('formatSessionStamp: omits the pid suffix when none provided', () => {
-  const d = new Date(2026, 4, 28, 22, 44, 52);
-  assert.equal(formatSessionStamp(d), '2026-05-28_22-44-52');
+test('formatSessionStamp: DD-MM-YYYY-mdu-session-HH-MM (no seconds/pid)', () => {
+  assert.equal(formatSessionStamp(new Date(2026, 4, 28, 7, 9, 5)), '28-05-2026-mdu-session-07-09');
+  assert.equal(formatSessionStamp(new Date(2026, 4, 28, 22, 44, 52)), '28-05-2026-mdu-session-22-44');
 });

tests/startup-renderer.test.js

@@ -0,0 +1,68 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const { EventEmitter } = require('node:events');
+const { configureStartupRenderer, createStartupWindow } = require('../lib/startup-renderer');
+
+class TestBrowserWindow extends EventEmitter {
+  constructor(options) {
+    super();
+    this.options = options;
+    this.showCalls = 0;
+    this.startupEvents = [];
+    this.loadError = new Error('renderer load failed');
+  }
+
+  once(eventName, listener) {
+    this.startupEvents.push(`listen:${eventName}`);
+    return super.once(eventName, listener);
+  }
+
+  show() {
+    this.showCalls++;
+  }
+
+  loadFile(target) {
+    this.startupEvents.push(`load:${target}`);
+    return Promise.reject(this.loadError);
+  }
+}
+
+test('configureStartupRenderer disables hardware acceleration', () => {
+  let calls = 0;
+  configureStartupRenderer({ disableHardwareAcceleration() { calls++; } });
+  assert.equal(calls, 1);
+});
+
+test('createStartupWindow forces the main window to start hidden', () => {
+  const startup = createStartupWindow(TestBrowserWindow, { width: 1100, show: true });
+
+  assert.equal(startup.window.options.width, 1100);
+  assert.equal(startup.window.options.show, false);
+});
+
+test('startup load registers visibility before navigation and shows only once', async () => {
+  const startup = createStartupWindow(TestBrowserWindow, {});
+  const loading = startup.load('renderer/index.html', () => {});
+
+  assert.deepEqual(startup.window.startupEvents, [
+    'listen:ready-to-show',
+    'load:renderer/index.html'
+  ]);
+
+  startup.window.emit('ready-to-show');
+  startup.window.emit('ready-to-show');
+  await loading;
+
+  assert.equal(startup.window.showCalls, 1);
+});
+
+test('startup load forwards a rejected navigation to the error handler', async () => {
+  const startup = createStartupWindow(TestBrowserWindow, {});
+  let handledError;
+
+  await startup.load('renderer/index.html', (err) => {
+    handledError = err;
+  });
+
+  assert.equal(handledError, startup.window.loadError);
+});

tests/suspect-reject-alternates.test.js

@@ -26,14 +26,20 @@ describe('suspect-reject alternate accounts', () => {
     fileProbe.probeFileHead = (...a) => mockProbe(...a);
 
     const fs = require('fs');
-    const origStatSync = fs.statSync;
-    fs.statSync = function (p) {
-      if (typeof p === 'string' && p.startsWith('/test/')) {
+    const fakeSize = (p) => {
       const m = /-(\d+)gb/i.exec(p);
       return { size: (m ? parseInt(m[1], 10) : 3) * 1024 * 1024 * 1024 };
-      }
+    };
+    const origStatSync = fs.statSync;
+    fs.statSync = function (p) {
+      if (typeof p === 'string' && p.startsWith('/test/')) return fakeSize(p);
       return origStatSync.call(this, p);
     };
+    const origStat = fs.promises.stat;
+    fs.promises.stat = async function (p) {
+      if (typeof p === 'string' && p.startsWith('/test/')) return fakeSize(p);
+      return origStat.call(this, p);
+    };
 
     UploadManager = require('../lib/upload-manager');
   });

tests/ui-smoke.js

@@ -48,20 +48,26 @@ setTimeout(async () => {
     console.log('\\n=== Upload View ===');
 
     const tabCount = await wc.executeJavaScript('document.querySelectorAll(".tab").length');
-    check('3 tabs exist', tabCount === 3);
+    check('4 tabs exist', tabCount === 4);
+
+    const tabLabels = await wc.executeJavaScript('[...document.querySelectorAll(".tab")].map(el => el.textContent.trim()).join("|")');
+    check('Current tab labels present', tabLabels === 'Upload|Accounts|Einstellungen|Verlauf');
+
+    const tabSemantics = await wc.executeJavaScript('document.querySelector(".tab-bar")?.getAttribute("role") + "|" + document.querySelector(".tab.active")?.getAttribute("aria-selected")');
+    check('Tab navigation exposes active state', tabSemantics === 'tablist|true');
 
     const activeTab = await wc.executeJavaScript('document.querySelector(".tab.active")?.textContent?.trim()');
     check('Upload tab active by default', activeTab === 'Upload');
 
+    const tabStops = await wc.executeJavaScript('[...document.querySelectorAll(".tab")].map(el => el.tabIndex).join("|")');
+    check('Tab navigation exposes one keyboard stop', tabStops === '0|-1|-1|-1');
+
     const dropVisible = await wc.executeJavaScript('document.getElementById("dropZone")?.style.display !== "none"');
     check('Drop zone visible (no files)', dropVisible);
 
-    const queueHidden = await wc.executeJavaScript('document.getElementById("queueContainer")?.style.display');
+    const queueHidden = await wc.executeJavaScript('document.getElementById("queueShell")?.style.display');
     check('Queue hidden (no files)', queueHidden === 'none');
 
-    const chips = await wc.executeJavaScript('document.querySelectorAll(".hoster-chip").length');
-    check('4 hoster chips', chips === 4);
-
     const startDisabled = await wc.executeJavaScript('document.getElementById("startUploadBtn")?.disabled');
     check('Start button disabled initially', startDisabled === true);
 
@@ -71,9 +77,90 @@ setTimeout(async () => {
     const version = await wc.executeJavaScript('document.getElementById("versionLabel")?.textContent');
     check('Version label present', version && version.startsWith('v'));
 
+    const localizedQueueHeaders = await wc.executeJavaScript('[...document.querySelectorAll("#queueTable thead th")].map(el => el.childNodes[0]?.textContent.trim()).join("|")');
+    check('Upload table labels are consistently German', localizedQueueHeaders === 'Dateiname|Hochgeladen / Größe|Hoster|Status|Zeit|Rest|Geschwindigkeit|Fortschritt');
+
+    const localizedRecentTabs = await wc.executeJavaScript('[...document.querySelectorAll(".recent-tab")].map(el => el.textContent.trim()).join("|")');
+    check('Recent panel labels are consistently German', localizedRecentTabs === 'Dateien|Statistik');
+
+    const localizedStatusbar = await wc.executeJavaScript('["sbConnections", "sbQueueCount", "sbRemainingCount", "sbInProgressCount", "sbDoneCount", "sbErrorCount"].map(id => document.getElementById(id)?.textContent).join("|")');
+    check('Statusbar labels are consistently German', localizedStatusbar === 'Verbindungen 0|Gesamt 0|Verbleibend 0|Läuft 0|Fertig 0|Fehler 0');
+
+    const toolbarLabels = await wc.executeJavaScript('[...document.querySelectorAll("#queueCommandBar .toolbar-btn")].map(el => el.getAttribute("aria-label")).join("|")');
+    check('Upload toolbar actions have German accessible names', toolbarLabels === 'Alle Uploads starten|Ausgewählte Uploads starten|Ausgewählte Datei erneut hochladen|Ausgewählten Upload abbrechen|Aktive Uploads beenden und stoppen|Alle Uploads abbrechen|Ganz nach oben|Nach oben|Nach unten|Ganz nach unten');
+
+    const keyboardTab = await wc.executeJavaScript('document.getElementById("upload-tab").focus(); document.getElementById("upload-tab").dispatchEvent(new KeyboardEvent("keydown", { key: "ArrowRight", bubbles: true })); document.querySelector(".tab.active")?.textContent?.trim() + "|" + document.activeElement?.id');
+    check('Arrow keys move and activate main tabs', keyboardTab === 'Accounts|accounts-tab');
+
     const ctxHidden = await wc.executeJavaScript('document.getElementById("contextMenu")?.style.display');
     check('Context menu hidden', ctxHidden === 'none');
 
+    console.log('\\n=== Accounts View ===');
+
+    await wc.executeJavaScript('document.querySelector(".tab[data-view=\\'accounts\\']").click()');
+    await new Promise(r => setTimeout(r, 300));
+
+    const accountsActive = await wc.executeJavaScript('document.getElementById("accounts-view")?.classList.contains("active")');
+    check('Accounts tab active', accountsActive);
+
+    const accountListValid = await wc.executeJavaScript('Boolean(document.querySelector("#accountsList .accounts-empty") || document.querySelectorAll("#accountsList .account-hoster-group").length)');
+    check('Account manager list structure rendered', accountListValid);
+
+    const addAccountEnabled = await wc.executeJavaScript('document.getElementById("addAccountBtn")?.disabled === false');
+    check('Add account button enabled', addAccountEnabled);
+
+    const emptyAccountAction = await wc.executeJavaScript('document.querySelector("[data-account-empty-add]")?.textContent?.trim()');
+    check('Empty account state offers direct action', emptyAccountAction === 'Ersten Account hinzufügen');
+
+    await wc.executeJavaScript('document.querySelector("[data-account-empty-add]").focus(); document.querySelector("[data-account-empty-add]").click()');
+    await new Promise(r => setTimeout(r, 200));
+
+    const accountModalVisible = await wc.executeJavaScript('document.getElementById("accountModal")?.style.display');
+    check('Account modal opens', accountModalVisible === 'flex');
+
+    const accountModalTitle = await wc.executeJavaScript('document.getElementById("accountModalTitle")?.textContent');
+    check('Account modal is in add mode', accountModalTitle === 'Account hinzufügen');
+
+    const accountModalSemantics = await wc.executeJavaScript('document.querySelector("#accountModal .modal-card")?.getAttribute("role") + "|" + document.querySelector("#accountModal .modal-card")?.getAttribute("aria-modal")');
+    check('Account modal exposes dialog semantics', accountModalSemantics === 'dialog|true');
+
+    const accountFormLabels = await wc.executeJavaScript('["accountHosterSelect", "accField_label", "accField_username", "accField_password"].every(id => document.getElementById(id)?.labels?.length === 1)');
+    check('Account form controls have linked labels', accountFormLabels);
+
+    const accountStatusLive = await wc.executeJavaScript('document.getElementById("accountModalStatus")?.getAttribute("aria-live")');
+    check('Account validation status is announced', accountStatusLive === 'polite');
+
+    const initialAccountFocus = await wc.executeJavaScript('document.activeElement?.id');
+    check('Account modal focuses first control', initialAccountFocus === 'accountHosterSelect');
+
+    const trappedAccountFocus = await wc.executeJavaScript('document.getElementById("saveAccountBtn").focus(); document.dispatchEvent(new KeyboardEvent("keydown", { key: "Tab", bubbles: true })); document.activeElement?.id');
+    check('Account modal keeps keyboard focus inside', trappedAccountFocus === 'closeAccountModalBtn');
+
+    const authOptionCount = await wc.executeJavaScript('document.querySelectorAll("#accountHosterSelect option").length');
+    check('7 hoster authentication options exist', authOptionCount === 7);
+
+    const hosterCount = await wc.executeJavaScript('[...new Set([...document.querySelectorAll("#accountHosterSelect option")].map(el => el.value.split(":")[0]))].length');
+    check('5 hosters exist', hosterCount === 5);
+
+    const accountSubmitLabel = await wc.executeJavaScript('document.getElementById("saveAccountBtn")?.textContent');
+    check('Account submit label is Prüfen und anlegen', accountSubmitLabel === 'Prüfen und anlegen');
+
+    const credentialInputs = await wc.executeJavaScript('document.querySelectorAll("#accountCredsFields .key-input").length');
+    check('Credential inputs rendered', credentialInputs === 2);
+
+    const passwordToggleState = await wc.executeJavaScript('document.querySelector("#accountCredsFields .toggle-vis").click(); document.querySelector("#accountCredsFields .toggle-vis").getAttribute("aria-label") + "|" + document.querySelector("#accountCredsFields .toggle-vis").getAttribute("aria-pressed")');
+    check('Password visibility action exposes its state', passwordToggleState === 'Passwort verbergen|true');
+
+    await wc.executeJavaScript('document.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true }))');
+    const accountModalHidden = await wc.executeJavaScript('document.getElementById("accountModal")?.style.display');
+    check('Escape closes account modal', accountModalHidden === 'none');
+
+    const restoredAccountFocus = await wc.executeJavaScript('document.activeElement?.hasAttribute("data-account-empty-add")');
+    check('Account modal restores trigger focus', restoredAccountFocus === true);
+
+    const fallbackAccountFocus = await wc.executeJavaScript('document.querySelector("[data-account-empty-add]").focus(); document.querySelector("[data-account-empty-add]").click(); document.querySelector("[data-account-empty-add]").remove(); document.dispatchEvent(new KeyboardEvent("keydown", { key: "Escape", bubbles: true })); document.activeElement?.id');
+    check('Account modal restores stable focus after list rerender', fallbackAccountFocus === 'addAccountBtn');
+
     console.log('\\n=== Settings View ===');
 
     await wc.executeJavaScript('document.querySelector(".tab[data-view=\\'settings\\']").click()');
@@ -82,23 +169,14 @@ setTimeout(async () => {
     const settingsActive = await wc.executeJavaScript('document.getElementById("settings-view")?.classList.contains("active")');
     check('Settings tab active', settingsActive);
 
-    const panels = await wc.executeJavaScript('document.querySelectorAll(".hoster-settings-panel").length');
-    check('4 hoster panels', panels === 4);
+    const settingsSubtabs = await wc.executeJavaScript('document.querySelectorAll(".settings-subtab").length');
+    check('6 settings subtabs exist', settingsSubtabs === 6);
 
-    const hsInputCount = await wc.executeJavaScript('document.querySelectorAll(".hs-input").length');
-    check('24 per-hoster inputs (6x4)', hsInputCount === 24);
+    const accountSettingsPointer = await wc.executeJavaScript('document.querySelector(".settings-hoster-pointer")?.textContent');
+    check('Hoster settings point to Accounts tab', accountSettingsPointer && accountSettingsPointer.includes('Accounts'));
 
-    await wc.executeJavaScript('document.querySelector(".hoster-panel-header").click()');
-    await new Promise(r => setTimeout(r, 200));
-
-    const panelBody = await wc.executeJavaScript('document.querySelector(".hoster-panel-body").style.display');
-    check('Panel expands on click', panelBody !== 'none');
-
-    const retries = await wc.executeJavaScript('document.querySelector(".hs-input[data-hs=\\'retries\\']")?.value');
-    check('Retries default 3', retries === '3');
-
-    const parallel = await wc.executeJavaScript('document.querySelector(".hs-input[data-hs=\\'parallelCount\\']")?.value');
-    check('ParallelCount default 2', parallel === '2');
+    const parallel = await wc.executeJavaScript('document.getElementById("parallelUploadCountInput")?.value');
+    check('Global parallel uploads default 0', parallel === '0');
 
     // Test save
     await wc.executeJavaScript('document.getElementById("saveSettingsBtn").click()');
@@ -137,8 +215,7 @@ setTimeout(async () => {
   results.forEach(r => console.log(r));
   console.log('\\nTotal: ' + (passed + failed) + ' | Passed: ' + passed + ' | Failed: ' + failed);
 
-  if (failed > 0) process.exitCode = 1;
-  app.quit();
+  app.exit(failed > 0 ? 1 : 0);
 }, 5000);
 `;
 
@@ -166,9 +243,7 @@ try {
       .join('\n');
     if (filtered.trim()) console.error(filtered);
   }
-  if (err.status && err.status !== 0 && !err.killed) {
-    process.exit(err.status);
-  }
+  process.exitCode = Number.isInteger(err.status) && err.status !== 0 ? err.status : 1;
 } finally {
   try { fs.unlinkSync(injectPath); } catch {}
 }

tests/updater-version.test.js

@@ -0,0 +1,98 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+const path = require('node:path');
+const { spawnSync } = require('node:child_process');
+const { pathToFileURL } = require('node:url');
+
+const { isNewer, resolveReleaseVersion } = require('../lib/updater');
+
+test('bridge title resolves product version instead of transport tag', () => {
+  assert.equal(resolveReleaseVersion({ name: 'Multi-Hoster-Upload v2.0.1', tag_name: 'v3.3.109' }), '2.0.1');
+  assert.equal(isNewer('2.0.1', '2.0.1'), false);
+  assert.equal(isNewer('2.0.2', '2.0.1'), true);
+});
+
+test('release CLI rejects a malformed transport tag before release work', () => {
+  const script = path.resolve(__dirname, '../scripts/release_gitea.mjs');
+  const result = spawnSync(process.execPath, [script, '2.0.1', '--transport-tag', '3.3.109', 'Bridge', '--dry-run'], {
+    cwd: path.resolve(__dirname, '..'),
+    encoding: 'utf8'
+  });
+
+  assert.equal(result.status, 1);
+  assert.match(result.stderr, /--transport-tag must match vX\.Y\.Z/);
+  assert.doesNotMatch(result.stdout, /npm run release:win/);
+});
+
+test('release plan keeps product artifacts separate from the transport tag', () => {
+  const script = path.resolve(__dirname, '../scripts/release_gitea.mjs');
+  const moduleUrl = pathToFileURL(script).href;
+  const source = `
+    import { createReleasePlan, parseReleaseArgs, renderLatestYml } from ${JSON.stringify(moduleUrl)};
+    const plan = createReleasePlan(parseReleaseArgs(['2.0.1', '--transport-tag', 'v3.3.109', 'Bridge', 'notes']));
+    const latestYml = renderLatestYml(plan, 'abc123', 456, '2026-08-07T12:00:00.000Z');
+    process.stdout.write(JSON.stringify({
+      version: plan.version,
+      transportTag: plan.transportTag,
+      releaseTitle: plan.releaseTitle,
+      releaseBody: plan.releaseBody,
+      expectedArtifacts: plan.expectedArtifacts,
+      latestYml
+    }));
+  `;
+  const result = spawnSync(process.execPath, ['--input-type=module', '--eval', source], {
+    cwd: path.resolve(__dirname, '..'),
+    encoding: 'utf8'
+  });
+
+  assert.equal(result.status, 0, result.stderr);
+  assert.deepEqual(JSON.parse(result.stdout), {
+    version: '2.0.1',
+    transportTag: 'v3.3.109',
+    releaseTitle: 'Multi-Hoster-Upload v2.0.1',
+    releaseBody: 'Bridge notes',
+    expectedArtifacts: [
+      'Multi-Hoster-Upload Setup 2.0.1.exe',
+      'Multi-Hoster-Upload 2.0.1.exe',
+      'latest.yml'
+    ],
+    latestYml: "version: 2.0.1\nfiles:\n  - url: Multi-Hoster-Upload Setup 2.0.1.exe\n    sha512: abc123\n    size: 456\npath: Multi-Hoster-Upload Setup 2.0.1.exe\nsha512: abc123\nreleaseDate: '2026-08-07T12:00:00.000Z'\n"
+  });
+});
+
+test('compatible existing release preserves the recovery id', async () => {
+  const moduleUrl = pathToFileURL(path.resolve(__dirname, '../scripts/release_gitea.mjs')).href;
+  const { createReleasePlan, parseReleaseArgs, resolveExistingReleaseId } = await import(moduleUrl);
+  const plan = createReleasePlan(parseReleaseArgs(['2.0.1', '--transport-tag', 'v3.3.109', 'Bridge notes']));
+  const release = {
+    id: 81,
+    tag_name: 'v3.3.109',
+    name: 'Multi-Hoster-Upload v2.0.1',
+    body: 'Bridge notes',
+    draft: false,
+    prerelease: false,
+    assets: []
+  };
+
+  assert.equal(resolveExistingReleaseId(plan, release), 81);
+});
+
+test('incompatible existing release title fails closed', async () => {
+  const moduleUrl = pathToFileURL(path.resolve(__dirname, '../scripts/release_gitea.mjs')).href;
+  const { createReleasePlan, parseReleaseArgs, resolveExistingReleaseId } = await import(moduleUrl);
+  const plan = createReleasePlan(parseReleaseArgs(['2.0.1', '--transport-tag', 'v3.3.109', 'Bridge notes']));
+  const release = {
+    id: 81,
+    tag_name: 'v3.3.109',
+    name: 'Multi-Hoster-Upload v3.3.109',
+    body: 'Old transport release',
+    draft: false,
+    prerelease: false,
+    assets: []
+  };
+
+  assert.throws(
+    () => resolveExistingReleaseId(plan, release),
+    /Refusing recovery for v3\.3\.109: existing release title "Multi-Hoster-Upload v3\.3\.109" does not match "Multi-Hoster-Upload v2\.0\.1"/
+  );
+});

tests/upload-manager.test.js

@@ -33,7 +33,7 @@ describe('UploadManager', () => {
     hosters.uploadFile = mockUploadFile;
     hosters.prefetchBaseline = async () => null;
 
-    // Mock fs.statSync for test file paths
+    // Mock fs.statSync + fs.promises.stat for test file paths
     const fs = require('fs');
     const origStatSync = fs.statSync;
     fs.statSync = function(p) {
@@ -42,6 +42,13 @@ describe('UploadManager', () => {
       }
       return origStatSync.call(this, p);
     };
+    const origStat = fs.promises.stat;
+    fs.promises.stat = async function(p) {
+      if (typeof p === 'string' && p.startsWith('/test/')) {
+        return { size: fakeFileSize };
+      }
+      return origStat.call(this, p);
+    };
 
     UploadManager = require('../lib/upload-manager');
   });
@@ -331,10 +338,10 @@ describe('UploadManager', () => {
   });
 
   it('file not found produces descriptive error', async () => {
-    // Override fs.statSync to throw ENOENT for a specific path
+    // Override fs.promises.stat to throw ENOENT for a specific path
     const fs = require('fs');
-    const origStat = fs.statSync;
-    fs.statSync = function(p) {
+    const origStat = fs.promises.stat;
+    fs.promises.stat = async function(p) {
       if (p === '/test/deleted.mp4') throw Object.assign(new Error('ENOENT'), { code: 'ENOENT' });
       return origStat.call(this, p);
     };
@@ -347,7 +354,7 @@ describe('UploadManager', () => {
       { file: '/test/deleted.mp4', hoster: 'doodstream.com', apiKey: 'key1' }
     ]);
 
-    fs.statSync = origStat;
+    fs.promises.stat = origStat;
     assert.ok(errors.some(e => e.includes('nicht gefunden')), `expected "nicht gefunden" error, got: ${errors.join(', ')}`);
   });
 

tests/validate-credentials.test.js

@@ -1,195 +1,208 @@
-// Pure unit tests for the validate-credentials shape contract — does NOT spin
-// up Electron or the real per-hoster checkers. Those need network. We verify
-// the SHAPE the ephemeral hosterConfig is built into (which the per-hoster
-// checkers consume) plus the snapshot-key/invalidation invariants that the
-// renderer relies on to enforce "validated creds only".
-//
-// The three assertions the advisor called out as the regression guard for the
-// user's "mehrfach angelegt" complaint:
-//   (a) failed validation persists nothing to config.hosters
-//   (b) a second "Anlegen" click with the guard set persists exactly one entry
-//   (c) OTP-required path persists nothing
-// are exercised at the state-machine level by simulating the renderer's logic
-// (re-implemented here as pure functions for testability — the real ones live
-// in renderer/app.js which can't run under node:test).
-
 const { test } = require('node:test');
-const assert = require('node:assert');
+const assert = require('node:assert/strict');
+const {
+  createAccountSubmitter,
+  getAccountSubmitLabel,
+  submitValidatedAccount
+} = require('../renderer/account-submit');
 
-// ---- Re-implementations of the renderer's pure helpers ----
-// These mirror the production code exactly so the tests serve as both a guard
-// and executable spec for what saveAccount() must do.
-
-function credsSnapshotKey(authType, creds) {
-  if (authType === 'login') return `login:${creds.username || ''}:${creds.password || ''}`;
-  return `api:${creds.apiKey || ''}`;
-}
-
-function buildEphemeralHosterConfig(payload) {
-  return {
-    username: payload.username || '',
-    password: payload.password || '',
-    apiKey: payload.apiKey || '',
-    enabled: true
-  };
-}
-
-// State-machine simulator that mirrors saveAccount() WITHOUT DOM/IPC.
-function makeStateMachine({ validateImpl, persistImpl }) {
-  let busy = false;
-  let validated = null; // { hosterName, authType, snapshot, status }
-  const log = []; // log of every persist call, for assertions
-
-  async function click(ctx, creds, otp = '') {
-    if (busy) { log.push({ type: 'click-ignored-busy' }); return; }
-    const snapshot = credsSnapshotKey(ctx.authType, creds);
-
-    // STEP 2: commit if validated matches.
-    if (validated &&
-        validated.hosterName === ctx.hosterName &&
-        validated.authType === ctx.authType &&
-        validated.snapshot === snapshot) {
-      busy = true;
-      try {
-        await persistImpl(ctx, creds);
-        log.push({ type: 'persisted', accountId: ctx.accountId || `${ctx.hosterName}-NEW` });
-      } finally { busy = false; }
-      return;
-    }
-
-    // STEP 1: ephemeral validate.
-    busy = true;
-    let row;
-    try {
-      row = await validateImpl({ hoster: ctx.hosterName, authType: ctx.authType, ...creds, otp });
-    } finally { busy = false; }
-    if (row && (row.status === 'ok' || row.status === 'warn')) {
-      validated = { hosterName: ctx.hosterName, authType: ctx.authType, snapshot, status: row.status };
-      log.push({ type: 'validated', status: row.status });
-      return;
-    }
-    if (row && row.status === 'otp_required') {
-      log.push({ type: 'otp-required' });
-      return;
-    }
-    log.push({ type: 'validation-failed', message: row && row.message });
-  }
-
-  function editField() { validated = null; log.push({ type: 'invalidated-by-edit' }); }
-  return { click, editField, log: () => log.slice(), getValidated: () => validated };
-}
-
-// ---- Tests ----
-
-test('regression (a): failed validation persists NOTHING to config.hosters', async () => {
-  const persistCalls = [];
-  const sm = makeStateMachine({
-    validateImpl: async () => ({ status: 'error', message: 'Falsches Passwort' }),
-    persistImpl: async (ctx, creds) => persistCalls.push({ ctx, creds })
-  });
-  await sm.click({ hosterName: 'doodstream.com', authType: 'login', isEdit: false }, { username: 'u', password: 'wrong' });
-  assert.equal(persistCalls.length, 0, 'no persist should happen on failed validation');
-  assert.equal(sm.getValidated(), null);
-  assert.deepEqual(sm.log().map(e => e.type), ['validation-failed']);
+test('account submit labels stay exact for add, edit, and OTP retries', () => {
+  assert.equal(getAccountSubmitLabel({ isEdit: false, hasOtp: false }), 'Prüfen und anlegen');
+  assert.equal(getAccountSubmitLabel({ isEdit: true, hasOtp: false }), 'Prüfen und speichern');
+  assert.equal(getAccountSubmitLabel({ isEdit: false, hasOtp: true }), 'Prüfen und anlegen');
+  assert.equal(getAccountSubmitLabel({ isEdit: true, hasOtp: true }), 'Prüfen und speichern');
 });
 
-test('regression (b): second click with guard set persists exactly ONE entry — no duplication', async () => {
-  const persistCalls = [];
-  let validateCount = 0;
-  const sm = makeStateMachine({
-    validateImpl: async () => { validateCount++; return { status: 'ok' }; },
-    persistImpl: async (ctx, creds) => persistCalls.push({ ctx, creds })
-  });
-  const ctx = { hosterName: 'doodstream.com', authType: 'login', isEdit: false };
-  const creds = { username: 'u', password: 'p' };
-  // Click 1 = validate → green.
-  await sm.click(ctx, creds);
-  // Click 2 = commit (same creds, validated snapshot matches).
-  await sm.click(ctx, creds);
-  // Click 3 = guard prevents a second commit because after persistImpl the
-  // state-machine in real code closes the modal. In this simulator the
-  // validated snapshot is still set — but a real double-click WHILE persistImpl
-  // is in flight would be caught by busy. Simulate that:
-  const sm2 = makeStateMachine({
-    validateImpl: async () => ({ status: 'ok' }),
-    persistImpl: () => new Promise(r => setTimeout(() => { persistCalls.push('slow'); r(); }, 30))
-  });
-  await sm2.click(ctx, creds); // validate
-  const p1 = sm2.click(ctx, creds); // start commit
-  const p2 = sm2.click(ctx, creds); // racing click — must be ignored
-  await Promise.all([p1, p2]);
-
-  assert.equal(persistCalls.length, 2, 'one persist from the deliberate two-step flow + one from sm2; racing click ignored');
-  assert.equal(validateCount, 1, 'second click reused the validated snapshot — no re-validate');
-  // The racing click MUST have been ignored by the busy guard.
-  assert.ok(sm2.log().some(e => e.type === 'click-ignored-busy'), 'busy guard fired on racing click');
-});
-
-test('regression (c): OTP-required persists NOTHING — and a follow-up click with OTP re-validates ephemerally', async () => {
-  const persistCalls = [];
-  let calls = 0;
-  const sm = makeStateMachine({
-    validateImpl: async (payload) => {
-      calls++;
-      if (!payload.otp) return { status: 'otp_required', message: 'OTP sent' };
-      if (payload.otp === '123456') return { status: 'ok' };
-      return { status: 'error', message: 'Bad OTP' };
+test('close and reopen cannot start a second save while the first save is pending', async () => {
+  const submitter = createAccountSubmitter();
+  let current = true;
+  let commits = 0;
+  let applies = 0;
+  let saveStarted;
+  let finishSave;
+  const started = new Promise(resolve => { saveStarted = resolve; });
+  const saving = new Promise(resolve => { finishSave = resolve; });
+  const first = submitter.submit({
+    validate: async () => ({ status: 'ok' }),
+    commit: async () => {
+      commits++;
+      saveStarted();
+      await saving;
+      return { accountId: 'first' };
     },
-    persistImpl: async (ctx, creds) => persistCalls.push({ ctx, creds })
+    afterCommit: async () => {
+      applies++;
+    },
+    isCurrent: () => current
   });
-  const ctx = { hosterName: 'doodstream.com', authType: 'login', isEdit: false };
-  const creds = { username: 'u', password: 'p' };
-  await sm.click(ctx, creds, '');         // first click → otp_required
-  await sm.click(ctx, creds, '123456');   // retry with otp → ok
-  await sm.click(ctx, creds);             // final click → commit
-  assert.equal(persistCalls.length, 1, 'exactly one persist after OTP confirmed');
-  assert.equal(calls, 2, 'validate ran twice (initial + OTP) before commit');
-  assert.deepEqual(
-    sm.log().map(e => e.type),
-    ['otp-required', 'validated', 'persisted']
-  );
-});
 
-test('field edit after green check invalidates the snapshot — next click is a re-Prüfen, not a commit', async () => {
-  const persistCalls = [];
-  let validateCount = 0;
-  const sm = makeStateMachine({
-    validateImpl: async () => { validateCount++; return { status: 'ok' }; },
-    persistImpl: async (ctx, creds) => persistCalls.push({ ctx, creds })
+  await started;
+  current = false;
+  const second = submitter.submit({
+    validate: async () => ({ status: 'ok' }),
+    commit: async () => {
+      commits++;
+    },
+    isCurrent: () => true
   });
-  const ctx = { hosterName: 'doodstream.com', authType: 'login', isEdit: false };
-  await sm.click(ctx, { username: 'u', password: 'p' });   // validate → green
-  sm.editField();                                           // user edits cred field → snapshot dropped
-  await sm.click(ctx, { username: 'u', password: 'newpw' }); // creds differ → re-validate
-  await sm.click(ctx, { username: 'u', password: 'newpw' }); // now commit the NEW creds
-  assert.equal(persistCalls.length, 1, 'one persist of the new (re-validated) creds');
-  assert.equal(persistCalls[0].creds.password, 'newpw', 'persisted creds match the re-validated set');
-  assert.equal(validateCount, 2, 'second validate was forced by the edit-induced invalidation');
+
+  assert.equal(second, null);
+  assert.equal(submitter.isBusy(), true);
+  finishSave();
+  const result = await first;
+
+  assert.equal(result.status, 'stale');
+  assert.equal(result.committed, true);
+  assert.equal(commits, 1);
+  assert.equal(applies, 1);
+  assert.equal(submitter.isBusy(), false);
 });
 
-test('snapshot key is identical for same creds and DIFFERENT for any cred change (excluding label)', () => {
-  // Label changes must NOT invalidate validation — label is metadata, not a credential.
-  assert.equal(credsSnapshotKey('login', { username: 'u', password: 'p' }),
-               credsSnapshotKey('login', { username: 'u', password: 'p', label: 'XYZ' }));
-  assert.notEqual(credsSnapshotKey('login', { username: 'u', password: 'p' }),
-                  credsSnapshotKey('login', { username: 'u', password: 'P' })); // password char-case
-  assert.notEqual(credsSnapshotKey('login', { username: 'u', password: 'p' }),
-                  credsSnapshotKey('login', { username: 'U', password: 'p' })); // username diff
-  assert.equal(credsSnapshotKey('api', { apiKey: 'KEY' }),
-               credsSnapshotKey('api', { apiKey: 'KEY', label: 'mein key' }));
-  assert.notEqual(credsSnapshotKey('api', { apiKey: 'KEY' }),
-                  credsSnapshotKey('api', { apiKey: 'KEY2' }));
+test('post-save apply failure remains committed and cannot invite a duplicate retry', async () => {
+  const expected = new Error('render failed');
+  let saves = 0;
+  let applies = 0;
+  const result = await submitValidatedAccount({
+    validate: async () => ({ status: 'ok' }),
+    commit: async () => {
+      saves++;
+      return { accountId: 'saved-account' };
+    },
+    afterCommit: async () => {
+      applies++;
+      throw expected;
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'committed');
+  assert.equal(result.value.accountId, 'saved-account');
+  assert.equal(result.postCommitError, expected);
+  assert.equal(saves, 1);
+  assert.equal(applies, 1);
 });
 
-test('ephemeral hosterConfig shape matches what per-hoster checkers expect', () => {
-  // The per-hoster checkers in main.js read .username/.password/.apiKey directly.
-  // This guards the validate-credentials IPC contract from drifting.
-  const cfg = buildEphemeralHosterConfig({ hoster: 'doodstream.com', username: 'u', password: 'p' });
-  assert.equal(cfg.username, 'u');
-  assert.equal(cfg.password, 'p');
-  assert.equal(cfg.apiKey, '');
-  assert.equal(cfg.enabled, true);
-  const cfg2 = buildEphemeralHosterConfig({ hoster: 'byse.sx', apiKey: 'K' });
-  assert.equal(cfg2.apiKey, 'K');
-  assert.equal(cfg2.username, '');
+test('ok validates and commits exactly once in one submission', async () => {
+  let validations = 0;
+  let commits = 0;
+  const result = await submitValidatedAccount({
+    validate: async () => {
+      validations++;
+      return { status: 'ok', message: 'Login erfolgreich' };
+    },
+    commit: async () => {
+      commits++;
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'committed');
+  assert.equal(validations, 1);
+  assert.equal(commits, 1);
+});
+
+test('warn validates and commits exactly once in one submission', async () => {
+  let commits = 0;
+  const validation = { status: 'warn', message: 'Login mit Warnung' };
+  const result = await submitValidatedAccount({
+    validate: async () => validation,
+    commit: async (received) => {
+      commits++;
+      assert.equal(received, validation);
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'committed');
+  assert.equal(result.validation, validation);
+  assert.equal(commits, 1);
+});
+
+for (const status of ['error', 'skipped']) {
+  test(`${status} rejects without committing`, async () => {
+    let commits = 0;
+    const validation = { status, message: `${status} result` };
+    const result = await submitValidatedAccount({
+      validate: async () => validation,
+      commit: async () => {
+        commits++;
+      },
+      isCurrent: () => true
+    });
+
+    assert.equal(result.status, 'rejected');
+    assert.equal(result.validation, validation);
+    assert.equal(commits, 0);
+  });
+}
+
+test('validate throw returns error without committing', async () => {
+  const expected = new Error('validation failed');
+  let commits = 0;
+  const result = await submitValidatedAccount({
+    validate: async () => {
+      throw expected;
+    },
+    commit: async () => {
+      commits++;
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'error');
+  assert.equal(result.error, expected);
+  assert.equal(commits, 0);
+});
+
+test('otp_required returns challenge without committing', async () => {
+  let commits = 0;
+  const validation = { status: 'otp_required', message: 'OTP gesendet' };
+  const result = await submitValidatedAccount({
+    validate: async () => validation,
+    commit: async () => {
+      commits++;
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'otp_required');
+  assert.equal(result.validation, validation);
+  assert.equal(commits, 0);
+});
+
+test('stale submission is rejected immediately before commit', async () => {
+  let current = true;
+  let commits = 0;
+  const validation = { status: 'ok' };
+  const result = await submitValidatedAccount({
+    validate: async () => {
+      current = false;
+      return validation;
+    },
+    commit: async () => {
+      commits++;
+    },
+    isCurrent: () => current
+  });
+
+  assert.equal(result.status, 'stale');
+  assert.equal(result.validation, validation);
+  assert.equal(commits, 0);
+});
+
+test('save failure returns error after one commit attempt', async () => {
+  const expected = new Error('save failed');
+  let commits = 0;
+  const result = await submitValidatedAccount({
+    validate: async () => ({ status: 'ok' }),
+    commit: async () => {
+      commits++;
+      throw expected;
+    },
+    isCurrent: () => true
+  });
+
+  assert.equal(result.status, 'error');
+  assert.equal(result.error, expected);
+  assert.equal(commits, 1);
 });