feat(quota): auto-balance credential priority and weight by remaining quota

src/i18n/authFileList.ts

@@ -1,5 +1,7 @@
 export const authFileListZhCN = {
   'quota.pluginCategory': '插件额度',
+  'quota.autoBalance': '按剩余额度自动均衡权重',
+  'quota.autoBalanceHint': '刷新额度时根据剩余比例自动更新凭证的 priority 与 weight',
   "authFiles.policy.title": "请求策略",
   "authFiles.policy.hint": "未设置时继承全局配置。错误规则按顺序优先生效，清空后恢复继承；正则使用 Go 语法。",
   "authFiles.operations.title": "批量管理",
@@ -43,6 +45,8 @@ export const authFileListZhCN = {
 
 export const authFileListEn: Record<keyof typeof authFileListZhCN, string> = {
   'quota.pluginCategory': 'Plugin quotas',
+  'quota.autoBalance': 'Auto-balance weights',
+  'quota.autoBalanceHint': 'Automatically update credential priority and weight based on remaining quota when refreshed',
   "authFiles.policy.title": "Request policies",
   "authFiles.policy.hint": "Unset values inherit global settings. Error rules run in order; clearing restores inheritance. Regex uses Go syntax.",
   "authFiles.operations.title": "Batch management",
@@ -86,6 +90,8 @@ export const authFileListEn: Record<keyof typeof authFileListZhCN, string> = {
 
 export const authFileListJa: Record<keyof typeof authFileListZhCN, string> = {
   'quota.pluginCategory': 'プラグイン割当量',
+  'quota.autoBalance': '残量に応じて重みを自動調整',
+  'quota.autoBalanceHint': 'クォータ更新時に残り割合に応じて認証情報の priority と weight を自動更新します',
   "authFiles.policy.title": "リクエストポリシー",
   "authFiles.policy.hint": "未設定は全体設定を継承します。ルールは順番に適用され、空にすると継承に戻ります。正規表現は Go 構文です。",
   "authFiles.operations.title": "一括管理",

src/pages/AuthFileManagementPage.tsx

@@ -3,6 +3,7 @@ import { refreshCredential } from '../services/authFileOperations';
 import { EmptyState } from '../components/EmptyState';
 import { Checkbox } from '../components/Checkbox';
 import { commitFetchedQuota } from '../services/quotaEnrichment';
+import { applyQuotaRoutingChange, subscribeQuotaRoutingChanges } from '../services/quotaAutoBalance';
 import { ChangeEvent, useCallback, useEffect, useMemo, useRef, useState } from 'react';
 import { useConfirmation } from '../components/ConfirmationDialog';
 import { QuotaActionFeedback } from '../components/QuotaActionFeedback';
@@ -137,6 +138,12 @@ export function AuthFileManagementPage({ initialProvider }: { initialProvider?:
     observedAt?: string;
   }>({ files: [], receivedAtMs: 0 });
   const { files, receivedAtMs, observedAt } = fileSnapshot;
+  useEffect(() => subscribeQuotaRoutingChanges((name, fields) => {
+    setFileSnapshot((current) => {
+      const nextFiles = applyQuotaRoutingChange(current.files, name, fields);
+      return nextFiles === current.files ? current : { ...current, files: nextFiles };
+    });
+  }), []);
   const [filter, setFilter] = useState('');
   const [page, setPage] = useState(1);
   const [pageSize, setPageSize] = useState(10);

src/pages/QuotaPage.tsx

@@ -1,7 +1,15 @@
 import { Notice } from '../components/Notice';
 import { EmptyState } from '../components/EmptyState';
 import { SegmentedControl } from '../components/SegmentedControl';
+import { Switch } from '../components/Switch';
 import { commitFetchedQuota } from '../services/quotaEnrichment';
+import {
+  applyQuotaRoutingChange,
+  restoreQuotaRoutingOriginals,
+  subscribeQuotaRoutingChanges,
+  syncCredentialQuotaRouting,
+  useQuotaAutoBalance,
+} from '../services/quotaAutoBalance';
 import { ResetCreditExpiries } from '../components/ResetCreditExpiries';
 import { MessageNotice } from '../appNotice';
 import { useCallback, useEffect, useMemo, useState } from 'react';
@@ -64,8 +72,28 @@ export function QuotaPage() {
   const [refreshing, setRefreshing] = useState(false);
   const [error, setError] = useState('');
   const [category, setCategory] = useState<'all' | QuotaDisplayProvider>('all');
+  const [autoBalance, setAutoBalance] = useQuotaAutoBalance();
   const querying = Object.values(quotas).some((quota) => quota.status === 'loading');
 
+  useEffect(() => subscribeQuotaRoutingChanges((name, fields) => {
+    setFiles((current) => applyQuotaRoutingChange(current, name, fields));
+  }), []);
+
+  const handleToggleAutoBalance = useCallback((enabled: boolean) => {
+    setAutoBalance(enabled);
+    if (!enabled) {
+      void restoreQuotaRoutingOriginals().catch((restoreError) => setError(String(restoreError)));
+      return;
+    }
+    const snapshot = getQuotaCacheSnapshot();
+    files.forEach((file) => {
+      const quota = snapshot[quotaKey(file)];
+      if (quota?.status === 'success') {
+        void syncCredentialQuotaRouting(file, quota).catch(() => {});
+      }
+    });
+  }, [files, setAutoBalance]);
+
   const loadFiles = useCallback(async () => {
     setLoading(true);
     setError('');
@@ -156,6 +184,13 @@ export function QuotaPage() {
         icon={<Gauge size={18} />}
         summary={t(files.length === 1 ? 'quota.queryableCredentials.one' : 'quota.queryableCredentials.other', { count: files.length })}
       >
+        <Switch
+          size="sm"
+          checked={autoBalance}
+          onChange={(event) => handleToggleAutoBalance(event.currentTarget.checked)}
+          label={t('quota.autoBalance')}
+          title={t('quota.autoBalanceHint')}
+        />
         <button type="button" className="secondary-button compact-button" onClick={() => void loadFiles()} disabled={loading || refreshing || querying}>
           {loading ? <RefreshCw size={16} className="spin" /> : <ListRestart size={16} />}{t('quota.readList')}
         </button>