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.ts

@@ -1,5 +1,5 @@
 import { create } from 'zustand';
-import { info } from '@tauri-apps/plugin-log';
+import { info } from '../utils/logger';
 import { invokeCommand as invoke } from '../ipc';
 
 import type { DownloadItem } from '../bindings/DownloadItem';