feat: 适配 Antigravity 账户余额查询与流式响应优化

1. Antigravity 账户适配:
   - 新增 GeminiBalanceProvider，支持 Antigravity 账户的额度查询（API 模式）
   - AccountBalanceService 增加 queryMode 逻辑与安全限制
   - 前端 BalanceDisplay 适配 Antigravity 配额显示

2. 流式响应增强:
   - 优化 thoughtSignature 捕获与回填，支持思维链透传
   - 修复工具调用签名校验

3. 其他:
   - 请求体大小限制提升至 100MB
   - .gitignore 更新

web/admin-spa/src/components/accounts/BalanceDisplay.vue

@@ -52,10 +52,51 @@
       </div>
 
       <!-- 配额（如适用） -->
-      <div v-if="quotaInfo" class="space-y-1">
+      <div v-if="quotaInfo && isAntigravityQuota" class="space-y-2">
         <div class="flex items-center justify-between text-xs text-gray-600 dark:text-gray-400">
-          <span>已用: {{ formatNumber(quotaInfo.used) }}</span>
-          <span>剩余: {{ formatNumber(quotaInfo.remaining) }}</span>
+          <span>剩余</span>
+          <span>{{ formatQuotaNumber(quotaInfo.remaining) }}</span>
+        </div>
+
+        <div class="space-y-1">
+          <div
+            v-for="row in antigravityRows"
+            :key="row.category"
+            class="flex items-center gap-2 rounded-md bg-gray-50 px-2 py-1.5 dark:bg-gray-700/60"
+          >
+            <span class="h-2 w-2 shrink-0 rounded-full" :class="row.dotClass"></span>
+            <span
+              class="min-w-0 flex-1 truncate text-xs font-medium text-gray-800 dark:text-gray-100"
+              :title="row.category"
+            >
+              {{ row.category }}
+            </span>
+
+            <div class="flex w-[94px] flex-col gap-0.5">
+              <div class="h-1.5 w-full rounded-full bg-gray-200 dark:bg-gray-600">
+                <div
+                  class="h-1.5 rounded-full transition-all"
+                  :class="row.barClass"
+                  :style="{ width: `${row.remainingPercent ?? 0}%` }"
+                ></div>
+              </div>
+              <div
+                class="flex items-center justify-between text-[11px] text-gray-500 dark:text-gray-300"
+              >
+                <span>{{ row.remainingText }}</span>
+                <span v-if="row.resetAt" class="text-gray-400 dark:text-gray-400">{{
+                  formatResetTime(row.resetAt)
+                }}</span>
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <div v-else-if="quotaInfo" class="space-y-1">
+        <div class="flex items-center justify-between text-xs text-gray-600 dark:text-gray-400">
+          <span>已用: {{ formatQuotaNumber(quotaInfo.used) }}</span>
+          <span>剩余: {{ formatQuotaNumber(quotaInfo.remaining) }}</span>
         </div>
         <div class="h-1.5 w-full rounded-full bg-gray-200 dark:bg-gray-700">
           <div
@@ -100,7 +141,8 @@ const props = defineProps({
   platform: { type: String, required: true },
   initialBalance: { type: Object, default: null },
   hideRefresh: { type: Boolean, default: false },
-  autoLoad: { type: Boolean, default: true }
+  autoLoad: { type: Boolean, default: true },
+  queryMode: { type: String, default: 'local' } // local | auto | api
 })
 
 const emit = defineEmits(['refreshed', 'error'])
@@ -136,6 +178,43 @@ const quotaInfo = computed(() => {
   }
 })
 
+const isAntigravityQuota = computed(() => {
+  return balanceData.value?.quota?.type === 'antigravity'
+})
+
+const antigravityRows = computed(() => {
+  if (!isAntigravityQuota.value) return []
+
+  const buckets = balanceData.value?.quota?.buckets
+  const list = Array.isArray(buckets) ? buckets : []
+  const map = new Map(list.map((b) => [b?.category, b]))
+
+  const order = ['Gemini Pro', 'Claude', 'Gemini Flash', 'Gemini Image']
+  const styles = {
+    'Gemini Pro': { dotClass: 'bg-blue-500', barClass: 'bg-blue-500 dark:bg-blue-400' },
+    Claude: { dotClass: 'bg-purple-500', barClass: 'bg-purple-500 dark:bg-purple-400' },
+    'Gemini Flash': { dotClass: 'bg-cyan-500', barClass: 'bg-cyan-500 dark:bg-cyan-400' },
+    'Gemini Image': { dotClass: 'bg-emerald-500', barClass: 'bg-emerald-500 dark:bg-emerald-400' }
+  }
+
+  return order.map((category) => {
+    const raw = map.get(category) || null
+    const remaining = raw?.remaining
+    const remainingPercent = Number.isFinite(Number(remaining))
+      ? Math.max(0, Math.min(100, Number(remaining)))
+      : null
+
+    return {
+      category,
+      remainingPercent,
+      remainingText: remainingPercent === null ? '—' : `${Math.round(remainingPercent)}%`,
+      resetAt: raw?.resetAt || null,
+      dotClass: styles[category]?.dotClass || 'bg-gray-400',
+      barClass: styles[category]?.barClass || 'bg-gray-400'
+    }
+  })
+})
+
 const quotaBarClass = computed(() => {
   const percentage = quotaInfo.value?.percentage || 0
   if (percentage >= 90) return 'bg-red-500 dark:bg-red-600'
@@ -144,7 +223,12 @@ const quotaBarClass = computed(() => {
 })
 
 const canRefresh = computed(() => {
-  // 仅在“已启用脚本且该账户配置了脚本”时允许刷新，避免误导（非脚本 Provider 多为降级策略）
+  // antigravity 配额：允许直接触发 Provider 刷新（无需脚本）
+  if (props.queryMode === 'api' || props.queryMode === 'auto') {
+    return true
+  }
+
+  // 其他平台：仅在“已启用脚本且该账户配置了脚本”时允许刷新，避免误导（非脚本 Provider 多为降级策略）
   const data = balanceData.value
   if (!data) return false
   if (data.scriptEnabled === false) return false
@@ -159,6 +243,9 @@ const refreshTitle = computed(() => {
     }
     return '请先配置余额脚本'
   }
+  if (isAntigravityQuota.value) {
+    return '刷新配额（调用 Antigravity API）'
+  }
   return '刷新余额（调用脚本配置的余额 API）'
 })
 
@@ -179,7 +266,10 @@ const load = async () => {
 
   try {
     const response = await apiClient.get(`/admin/accounts/${props.accountId}/balance`, {
-      params: { platform: props.platform, queryApi: false }
+      params: {
+        platform: props.platform,
+        queryApi: props.queryMode === 'api' ? true : props.queryMode === 'auto' ? 'auto' : false
+      }
     })
     if (response?.success) {
       balanceData.value = response.data
@@ -231,6 +321,16 @@ const formatNumber = (num) => {
   return value.toLocaleString('zh-CN', { maximumFractionDigits: 2 })
 }
 
+const formatQuotaNumber = (num) => {
+  if (num === Infinity) return '∞'
+  const value = Number(num)
+  if (!Number.isFinite(value)) return 'N/A'
+  if (isAntigravityQuota.value) {
+    return `${Math.round(value)}%`
+  }
+  return formatNumber(value)
+}
+
 const formatCurrency = (amount) => {
   const value = Number(amount)
   if (!Number.isFinite(value)) return '$0.00'

web/admin-spa/src/views/AccountsView.vue

@@ -797,11 +797,19 @@
                     :account-id="account.id"
                     :initial-balance="account.balanceInfo"
                     :platform="account.platform"
+                    :query-mode="
+                      account.platform === 'gemini' && account.oauthProvider === 'antigravity'
+                        ? 'auto'
+                        : 'local'
+                    "
                     @error="(error) => handleBalanceError(account.id, error)"
                     @refreshed="(data) => handleBalanceRefreshed(account.id, data)"
                   />
                   <div class="mt-1 text-xs">
                     <button
+                      v-if="
+                        !(account.platform === 'gemini' && account.oauthProvider === 'antigravity')
+                      "
                       class="text-blue-500 hover:underline dark:text-blue-300"
                       @click="openBalanceScriptModal(account)"
                     >
@@ -1476,11 +1484,17 @@
               :account-id="account.id"
               :initial-balance="account.balanceInfo"
               :platform="account.platform"
+              :query-mode="
+                account.platform === 'gemini' && account.oauthProvider === 'antigravity'
+                  ? 'auto'
+                  : 'local'
+              "
               @error="(error) => handleBalanceError(account.id, error)"
               @refreshed="(data) => handleBalanceRefreshed(account.id, data)"
             />
             <div class="mt-1 text-xs">
               <button
+                v-if="!(account.platform === 'gemini' && account.oauthProvider === 'antigravity')"
                 class="text-blue-500 hover:underline dark:text-blue-300"
                 @click="openBalanceScriptModal(account)"
               >