refactor: replace JSON deep copy with deepClone helper and extract useTauriEvent hook (#3140)

* refactor: replace JSON.parse(JSON.stringify()) with structuredClone and extract useTauriEvent hook

Replace all `JSON.parse(JSON.stringify())` deep copy patterns with native
`structuredClone()` across production source (9 occurrences), tests (11
occurrences), and a hand-rolled `deepClone` utility in providerConfigUtils.ts.
Add "ES2022" to tsconfig lib for type support.

Extract a `useTauriEvent` hook to eliminate the repeated Tauri event listener
boilerplate (`useEffect` + `active/disposed` flag + async `listen`) that was
duplicated across App.tsx (3 listeners) and useUsageCacheBridge.ts. The hook
handles async registration, race-condition guards, and cleanup automatically.

* fix: add compatible deepClone helper

- Add a shared deepClone helper with a structuredClone runtime guard and fallback.
- Route clone call sites through the helper.
- Preserve universal-provider-synced listener ordering and drop the dead-directory diff.

* fix: harden Tauri event handling

- Guard WebDAV sync status events against missing payloads.
- Preserve settings query invalidation ordering before showing auto-sync errors.
- Simplify useTauriEvent subscriptions to avoid dependency-driven re-listens.

---------

Co-authored-by: zcb <zhangchongbiao@qiyuanlab.com>
Co-authored-by: Jason <farion1231@gmail.com>

src/utils/deepClone.ts

@@ -0,0 +1,21 @@
+export function deepClone<T>(value: T): T {
+  if (typeof globalThis.structuredClone === "function") {
+    return globalThis.structuredClone(value);
+  }
+
+  return deepCloneFallback(value);
+}
+
+function deepCloneFallback<T>(value: T): T {
+  if (value === null || typeof value !== "object") return value;
+  if (value instanceof Date) return new Date(value.getTime()) as T;
+  if (Array.isArray(value)) {
+    return value.map((item) => deepCloneFallback(item)) as T;
+  }
+
+  const cloned = {} as T;
+  Object.keys(value).forEach((key) => {
+    cloned[key as keyof T] = deepCloneFallback(value[key as keyof T]);
+  });
+  return cloned;
+}