release: v2.0.6

Redesign the desktop workspace with task sidebars, live filters, clearer settings, and an accessible update dialog.

Harden encrypted backup imports, configuration persistence, history retention, queue snapshots, shutdown recovery, and update installation ordering.

Publish verified Windows artifacts and refreshed English documentation.

lib/log-rotation.js

@@ -0,0 +1,52 @@
+// Generic numbered-backup log rotation. Used by the upload log + can be
+// reused by other long-lived log files (debug log, account-rotation log).
+//
+// Behaviour:
+// - File missing → no-op, returns false.
+// - File ≤ maxBytes → no-op, returns false.
+// - File > maxBytes → drop oldest .N backup, shift .K → .K+1, rename live
+//   file to .1, return true. Caller (or the next append) creates a fresh
+//   primary on demand.
+//
+// Errors are reported via `log` (e.g. debugLog) but never thrown — rotation
+// is best-effort; the caller's append happens anyway.
+
+const fs = require('fs');
+const path = require('path');
+
+function maybeRotateLogFile(filePath, maxBytes, maxBackups = 3, log = () => {}) {
+  if (!filePath || !Number.isFinite(maxBytes) || maxBytes <= 0) return false;
+  let size = 0;
+  try {
+    const st = fs.statSync(filePath);
+    size = st.size;
+  } catch (err) {
+    // ENOENT is normal — nothing to rotate yet.
+    if (err && err.code !== 'ENOENT') {
+      log(`logRotation: stat ${filePath} failed: ${err.message}`);
+    }
+    return false;
+  }
+  if (size <= maxBytes) return false;
+
+  const ext = path.extname(filePath);
+  const base = filePath.slice(0, filePath.length - ext.length);
+
+  // Drop the oldest backup if it exists, then shift each numbered backup up
+  // one slot. Errors are ignored: missing intermediate backups are normal,
+  // failed renames just mean we'll rotate again next time.
+  try { fs.unlinkSync(`${base}.${maxBackups}${ext}`); } catch {}
+  for (let i = maxBackups - 1; i >= 1; i--) {
+    try { fs.renameSync(`${base}.${i}${ext}`, `${base}.${i + 1}${ext}`); } catch {}
+  }
+  try {
+    fs.renameSync(filePath, `${base}.1${ext}`);
+    log(`logRotation: rotated ${filePath} (${(size / 1024 / 1024).toFixed(1)} MB) → ${base}.1${ext}`);
+    return true;
+  } catch (err) {
+    log(`logRotation: rename ${filePath} → ${base}.1${ext} failed: ${err.message}`);
+    return false;
+  }
+}
+
+module.exports = { maybeRotateLogFile };