fix: harden account rotation and active download recovery

Apply account enablement changes optimistically and persist rapid toggles sequentially without losing clicks.

Refresh Mega-Debrid API and Web account pools during active downloads, isolate per-account cancellation budgets, rotate within the same conversion attempt, and keep pause, stop, resume, reset, and no-account gates consistent.

Use the native Electron clipboard under Remote Desktop and make support bundle export bounded, redacted, responsive, guarded, visible, and atomic.

Add end-to-end regressions for live account switching, persisted partial recovery, support export, native copy, availability preservation, and the 500 ms telemetry cadence.

src/shared/ipc.ts

@@ -33,8 +33,9 @@ export const IPC_CHANNELS = {
   PICK_FOLDER: "dialog:pick-folder",
   PICK_CONTAINERS: "dialog:pick-containers",
   STATE_UPDATE: "state:update",
-  CLIPBOARD_DETECTED: "clipboard:detected",
-  TOGGLE_CLIPBOARD: "clipboard:toggle",
+  CLIPBOARD_DETECTED: "clipboard:detected",
+  TOGGLE_CLIPBOARD: "clipboard:toggle",
+  WRITE_CLIPBOARD_TEXT: "clipboard:write-text",
   GET_SESSION_STATS: "stats:get-session-stats",
   RESET_SESSION_STATS: "stats:reset-session",
   RESET_DOWNLOAD_STATS: "stats:reset-download",