feat(tray): show cached provider usage in the system tray menu (#2184)

* feat: add Rust-side write-through usage cache

Introduce an in-memory UsageCache on AppState that the existing usage
query commands populate on success. The cache is read-only to the rest
of the app today; the next commit consumes it from the tray menu.

- New services::usage_cache module with split maps: subscription keyed
  by AppType, script keyed by (AppType, provider_id).
- AppType gains Eq + Hash so it can be used as a HashMap key.
- commands::subscription::get_subscription_quota now takes State<AppState>
  and writes through on success (signature change is invisible to the
  frontend — Tauri injects State automatically).
- commands::provider::queryProviderUsage body extracted into an inner
  async fn; the public command wraps it with write-through, covering
  Copilot, coding-plan, balance, and generic script paths uniformly.

Cache is in-memory only; auto-query interval and the upcoming tray
refresh action rebuild it after restarts.

* feat(tray): surface cached usage in the system tray menu

Read UsageCache populated by the previous commit and render it in three
places, scoped to whatever TRAY_SECTIONS covers (Claude/Codex/Gemini):

1. Inline suffix on each provider submenu item
   "AnyProvider  · 🟢 5h 18% / 7d 23%"
2. Disabled summary row per visible app under "Show Main"
   "Claude · Anthropic Official · 🟢 5h 18% / 7d 23%"
3. "Refresh all usage" menu item that triggers get_subscription_quota +
   queryProviderUsage for every applicable provider, then rebuilds the
   tray menu via the existing refresh_tray_menu path.

Color encoding uses emoji (🟢 <70% / 🟠 70-89% / 🔴 ≥90%) since Tauri 2
tray labels are plain text. Missing cache entry leaves the label
unchanged — tray never issues network requests when opened. Three new
i18n-ready strings live in TrayTexts (en/zh/ja), following the existing
pattern for tray text.

Closes #2178.

* feat(usage): bridge tray UsageCache writes to frontend React Query

Why: tray hover triggers backend-only refresh that wrote to UsageCache but
never notified the frontend, leaving main UI stale while tray showed fresh
numbers. Emit a payload-carrying event after each cache write so React Query
can setQueryData directly, keeping both views in sync without duplicate fetches.

* fix(tray): skip hidden apps on hover refresh and drop stale disabled-script cache

Address P2 findings from automated review on #2184:

1. refresh_all_usage_in_tray now filters TRAY_SECTIONS by settings.visible_apps
   before scheduling subscription/script queries, matching create_tray_menu and
   preventing wasted external API calls (and rate-limit/auth-error log noise)
   for apps the user has hidden.

2. format_usage_suffix only trusts the script cache when provider.meta.usage_script
   is still enabled; when a script is disabled/removed the cached suffix is now
   invalidated so the tray label no longer shows stale data indefinitely.

* refactor: consolidate codex provider helpers and fix test semantics

- Add Provider::is_codex_oauth() and Provider::codex_fast_mode_enabled()
  to eliminate duplicated meta extraction in claude.rs and stream_check.rs
- Fix non-codex-oauth tests to pass codex_fast_mode=false (was true, harmless
  but semantically misleading)
- Remove redundant is_dir() guard after resolve_skill_source_dir already
  guarantees the returned path is a directory

* style: apply cargo fmt

* fix(tray): reflect failed refreshes in cache and support Gemini flash-lite

Follow-up to the tray usage-display feature addressing review feedback:

- Write snapshots for both Ok(success:false) and Err paths in
  queryProviderUsage / get_subscription_quota so stale success data
  no longer persists across failed refreshes; the original Err is
  still returned to the frontend onError handler.
- Include gemini_flash_lite tier in the tray summary with label "l".
  Matches the frontend SubscriptionQuotaFooter and keeps the worst
  emoji correct when lite is the highest utilization.
- Add TIER_GEMINI_PRO / _FLASH / _FLASH_LITE constants in
  services/subscription.rs and reuse them in classify_gemini_model
  and sort_order.
- Extract Provider::has_usage_script_enabled() to remove the
  duplicated meta.usage_script chain at two call sites.
- Use db.get_provider_by_id in refresh_all_usage_in_tray instead of
  materialising the full provider map, and parallelise subscription
  and script futures via futures::future::join.
- Narrow refresh_all_usage_in_tray to each section's effective
  current provider (script if enabled, else subscription when the
  provider is official). Hover refreshes now issue at most
  TRAY_SECTIONS.len() outbound requests.
- Add 10 unit tests in tray::tests covering Claude/Codex h/w dispatch,
  Gemini p/f/l dispatch (including lite-only and lite-worst cases),
  and success/failure guards.

---------

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

src-tauri/tests/deeplink_import.rs

@@ -1,8 +1,6 @@
 use std::sync::Arc;
 
-use cc_switch_lib::{
-    import_provider_from_deeplink, parse_deeplink_url, AppState, Database, ProxyService,
-};
+use cc_switch_lib::{import_provider_from_deeplink, parse_deeplink_url, AppState, Database};
 
 #[path = "support.rs"]
 mod support;
@@ -18,11 +16,7 @@ fn deeplink_import_claude_provider_persists_to_db() {
     let request = parse_deeplink_url(url).expect("parse deeplink url");
 
     let db = Arc::new(Database::memory().expect("create memory db"));
-    let proxy_service = ProxyService::new(db.clone());
-    let state = AppState {
-        db: db.clone(),
-        proxy_service,
-    };
+    let state = AppState::new(db.clone());
 
     let provider_id = import_provider_from_deeplink(&state, request.clone())
         .expect("import provider from deeplink");
@@ -58,11 +52,7 @@ fn deeplink_import_codex_provider_builds_auth_and_config() {
     let request = parse_deeplink_url(url).expect("parse deeplink url");
 
     let db = Arc::new(Database::memory().expect("create memory db"));
-    let proxy_service = ProxyService::new(db.clone());
-    let state = AppState {
-        db: db.clone(),
-        proxy_service,
-    };
+    let state = AppState::new(db.clone());
 
     let provider_id = import_provider_from_deeplink(&state, request.clone())
         .expect("import provider from deeplink");

src-tauri/tests/support.rs

@@ -1,9 +1,7 @@
 use std::path::{Path, PathBuf};
 use std::sync::{Arc, Mutex, OnceLock};
 
-use cc_switch_lib::{
-    update_settings, AppSettings, AppState, Database, MultiAppConfig, ProxyService,
-};
+use cc_switch_lib::{update_settings, AppSettings, AppState, Database, MultiAppConfig};
 
 /// 为测试设置隔离的 HOME 目录，避免污染真实用户数据。
 pub fn ensure_test_home() -> &'static Path {
@@ -62,8 +60,7 @@ pub fn test_mutex() -> &'static Mutex<()> {
 #[allow(dead_code)]
 pub fn create_test_state() -> Result<AppState, Box<dyn std::error::Error>> {
     let db = Arc::new(Database::init()?);
-    let proxy_service = ProxyService::new(db.clone());
-    Ok(AppState { db, proxy_service })
+    Ok(AppState::new(db))
 }
 
 /// 创建测试用的 AppState，并从 MultiAppConfig 迁移数据
@@ -73,6 +70,5 @@ pub fn create_test_state_with_config(
 ) -> Result<AppState, Box<dyn std::error::Error>> {
     let db = Arc::new(Database::init()?);
     db.migrate_from_json(config)?;
-    let proxy_service = ProxyService::new(db.clone());
-    Ok(AppState { db, proxy_service })
+    Ok(AppState::new(db))
 }