fix(logs): make log storage location safe and configurable

Adds an AppData/Desktop log storage selector with controlled migration of known log files only. Keeps runtime data and credentials in AppData, consolidates desktop rename logs into the chosen directory, and exposes the active log folder through the desktop UI.\n\nFlushes early recovery diagnostics into the runtime log before a location migration, preserves the active trace configuration as valid JSON during moves, and prevents backup imports from failing when the requested log location is unavailable. Adds regression coverage for desktop paths, legacy log migration, secret exclusion, and trace-config replacement.

src/renderer/App.tsx

@@ -821,7 +821,7 @@ const emptySnapshot = (): UiSnapshot => ({
     autoReconnect: false, reconnectWaitSeconds: 45, completedCleanupPolicy: "never",
     maxParallel: 4, maxParallelExtract: 2, extractCpuPriority: "high", retryLimit: 0, speedLimitEnabled: false, speedLimitKbps: 0, speedLimitMode: "global",
     updateRepo: "", autoUpdateCheck: true, clipboardWatch: false, minimizeToTray: false,
-    theme: "dark", collapseNewPackages: true, historyRetentionMode: "permanent", historyMaxEntries: 500, historyMaxAgeDays: 0, autoSortPackagesByProgress: false, autoSkipExtracted: false, hideExtractedItems: true, confirmDeleteSelection: true, backupIncludeDownloads: false, backupIncludeRemoteDiagnostics: false,
+    theme: "dark", logStorageLocation: "appdata", collapseNewPackages: true, historyRetentionMode: "permanent", historyMaxEntries: 500, historyMaxAgeDays: 0, autoSortPackagesByProgress: false, autoSkipExtracted: false, hideExtractedItems: true, confirmDeleteSelection: true, backupIncludeDownloads: false, backupIncludeRemoteDiagnostics: false,
     notifyMention: "", notifyOnPackageCompleted: false, notifyOnPackageFailed: false, notifyOnRunFinished: false,
     accountListShowDetailedDebridLinkKeys: false,
     bandwidthSchedules: [], totalDownloadedAllTime: 0, totalCompletedFilesAllTime: 0, totalRuntimeAllTimeMs: 0,
@@ -5075,6 +5075,12 @@ export function App(): ReactElement {
         });
         return;
       }
+      if (fieldId === "logStorageDirectory") {
+        void performQuickAction(async () => {
+          await window.rd.openLogDirectory();
+        });
+        return;
+      }
       const targetKey = fieldId === "outputDir" ? "outputDir" : fieldId === "extractDir" ? "extractDir" : fieldId === "mkvLibraryDir" ? "mkvLibraryDir" : null;
       if (targetKey) {
         void performQuickAction(async () => {
@@ -5467,6 +5473,7 @@ export function App(): ReactElement {
                   className={`menu-submenu-dropdown${openSubmenu === "hilfe-log" ? " is-open" : ""}`}
                 >
                     <button className="menu-dropdown-item" onClick={() => { closeMenus(); void window.rd.openLog().catch(() => {}); }}><span>Haupt-Log</span></button>
+                    <button className="menu-dropdown-item" onClick={() => { closeMenus(); void window.rd.openLogDirectory().catch(() => {}); }}><span>Log-Ordner öffnen</span></button>
                     <button className="menu-dropdown-item" onClick={() => { closeMenus(); void window.rd.openAuditLog().catch(() => {}); }}><span>Audit-Log</span></button>
                     <button className="menu-dropdown-item" onClick={() => { closeMenus(); void window.rd.openRenameLog().catch(() => {}); }}><span>Rename-Log</span></button>
                     <button className="menu-dropdown-item" onClick={() => { closeMenus(); void window.rd.openSessionLog().catch(() => {}); }}><span>Session-Log</span></button>

src/renderer/views/settings/settings-model.ts

@@ -466,7 +466,19 @@ export function buildSettingsFormViewModel({
         title: "Speicherort",
         fields: [
           { id: "outputDir", kind: "path", label: "Download-Ordner", value: settings.outputDir, actionLabel: "Wählen", help: "Zielordner für heruntergeladene Dateien." },
-          { id: "packageName", kind: "text", label: "Paketname (optional)", value: settings.packageName }
+          { id: "packageName", kind: "text", label: "Paketname (optional)", value: settings.packageName },
+          {
+            id: "logStorageLocation",
+            kind: "select",
+            label: "Log-Speicherort",
+            value: settings.logStorageLocation,
+            options: [
+              { value: "appdata", label: "AppData (empfohlen)" },
+              { value: "desktop", label: "Desktop / Downloader Log" }
+            ],
+            help: "Beim Wechsel werden vorhandene Log-Dateien übernommen. Zugangsdaten und App-Konfiguration bleiben in AppData."
+          },
+          { id: "logStorageDirectory", kind: "action", label: "Log-Ordner", actionLabel: "Ordner öffnen" }
         ]
       },
       {