feat: display subscription quota for Codex OAuth provider cards

Codex OAuth (ChatGPT Plus/Pro) providers previously fell through to the
default UsageFooter branch and showed no quota at all, while Copilot and
official Codex providers already had a wham/usage-backed quota footer.

This wires up the same five-hour / seven-day tier badges for codex_oauth
provider cards by reusing the existing query_codex_quota function and
SubscriptionQuotaFooter rendering, parameterized to keep both the CLI
credential path ("codex") and the cc-switch managed OAuth path
("codex_oauth") working from a single source of truth.

- Parameterize services::subscription::query_codex_quota with tool_label
  and expired_message; promote SubscriptionQuota constructors to
  pub(crate). The CLI path keeps its existing "codex" label and the
  "re-login with Codex CLI" message; the new path passes "codex_oauth"
  and a cc-switch-specific re-login hint.
- Add a new get_codex_oauth_quota Tauri command in commands/codex_oauth.rs
  that resolves the ChatGPT account (explicit binding > default account
  > not_found), pulls a valid access_token from CodexOAuthManager
  (auto-refresh handled), and delegates to query_codex_quota.
- Extract SubscriptionQuotaFooter's render body into a pure
  SubscriptionQuotaView component (props: quota / loading / refetch /
  appIdForExpiredHint / inline). The existing SubscriptionQuotaFooter
  becomes a thin wrapper with identical props and behavior, so
  CopilotQuotaFooter and the official Claude/Codex/Gemini paths are
  untouched. This avoids duplicating ~280 lines of five-state rendering.
- Add CodexOauthQuotaFooter, a 38-line wrapper that calls the new
  useCodexOauthQuota hook and forwards to SubscriptionQuotaView.
- ProviderCard inserts an isCodexOauth branch between isCopilot and
  isOfficial, keyed off PROVIDER_TYPES.CODEX_OAUTH (newly added to
  config/constants.ts to centralize the previously scattered string).
- Frontend hook caches per (codex_oauth, accountId) so multiple cards
  bound to the same ChatGPT account share one fetch via react-query
  dedup; cards bound to different accounts get independent fetches.
- No new i18n keys: existing subscription.fiveHour / sevenDay / expired /
  refresh / queryFailed / expiredHint are reused.

src/lib/api/subscription.ts

@@ -4,6 +4,8 @@ import type { SubscriptionQuota } from "@/types/subscription";
 export const subscriptionApi = {
   getQuota: (tool: string): Promise<SubscriptionQuota> =>
     invoke("get_subscription_quota", { tool }),
+  getCodexOauthQuota: (accountId: string | null): Promise<SubscriptionQuota> =>
+    invoke("get_codex_oauth_quota", { accountId }),
   getCodingPlanQuota: (
     baseUrl: string,
     apiKey: string,

src/lib/query/subscription.ts

@@ -1,6 +1,9 @@
 import { useQuery } from "@tanstack/react-query";
 import { subscriptionApi } from "@/lib/api/subscription";
 import type { AppId } from "@/lib/api/types";
+import type { ProviderMeta } from "@/types";
+import { resolveManagedAccountId } from "@/lib/authBinding";
+import { PROVIDER_TYPES } from "@/config/constants";
 
 const REFETCH_INTERVAL = 5 * 60 * 1000; // 5 minutes
 
@@ -15,3 +18,28 @@ export function useSubscriptionQuota(appId: AppId, enabled: boolean) {
     retry: 1,
   });
 }
+
+/**
+ * Codex OAuth (ChatGPT Plus/Pro 反代) 订阅额度查询 hook
+ *
+ * 与 `useSubscriptionQuota` 平行：数据走 cc-switch 自管的 OAuth token，
+ * 而不是 Codex CLI 的 ~/.codex/auth.json。
+ *
+ * Query key 包含 accountId，多张卡片绑定到同一账号时会自动去重共享请求。
+ * accountId 为 null 时使用 "default" 占位，让后端 fallback 到默认账号。
+ */
+export function useCodexOauthQuota(
+  meta: ProviderMeta | undefined,
+  enabled: boolean,
+) {
+  const accountId = resolveManagedAccountId(meta, PROVIDER_TYPES.CODEX_OAUTH);
+  return useQuery({
+    queryKey: ["codex_oauth", "quota", accountId ?? "default"],
+    queryFn: () => subscriptionApi.getCodexOauthQuota(accountId),
+    enabled,
+    refetchInterval: REFETCH_INTERVAL,
+    refetchOnWindowFocus: true,
+    staleTime: REFETCH_INTERVAL,
+    retry: 1,
+  });
+}