feat(logging): default to paused state and prevent performance hit via frontend wrapper

- Default LOG_PAUSED to true in backend.
- Combine tauri_plugin_log filters to drop backend logs when paused.
- Create frontend logger wrapper to intercept and drop logs before IPC when paused.
- Sync LogsView state directly with logger wrapper and handle initialization races.

src/store/useDownloadStore.test.ts

@@ -8,8 +8,9 @@ vi.mock('../ipc', () => ({
 }));
 
 // Mock window.__TAURI_INTERNALS__ and log to prevent errors
-vi.mock('@tauri-apps/plugin-log', () => ({
+vi.mock('../utils/logger', () => ({
   info: vi.fn(),
+  warn: vi.fn(),
   error: vi.fn(),
 }));