fix: enable Gemini model_mapping UI and extend warmup to Antigravity

- Remove Gemini platform exclusion from model restriction UI in
  Create/Edit account modals (Gemini now supports model_mapping)
- Remove outdated Gemini model passthrough info cards
- Add model_mapping field to GeminiCredentials type
- Extend warmup request interception toggle to Antigravity platform
- Remove redundant try/catch in API key account creation
- Remove noisy gateway.request_completed debug log
- Reorganize Gemini model mapping sections in constants.go

backend/internal/domain/constants.go

@@ -93,14 +93,15 @@ var DefaultAntigravityModelMapping = map[string]string{
 	"gemini-3-pro-high":  "gemini-3.1-pro-high",
 	"gemini-3-pro-low":   "gemini-3.1-pro-low",
 	"gemini-3-pro-image": "gemini-3-pro-image",
-	// Gemini 3.1 透传
-	"gemini-3.1-pro-high":    "gemini-3.1-pro-high",
-	"gemini-3.1-pro-low":     "gemini-3.1-pro-low",
-	"gemini-3.1-pro-preview": "gemini-3.1-pro-high",
 	// Gemini 3 preview 映射
 	"gemini-3-flash-preview":     "gemini-3-flash",
 	"gemini-3-pro-preview":       "gemini-3.1-pro-high",
 	"gemini-3-pro-image-preview": "gemini-3-pro-image",
+	// Gemini 3.1 白名单
+	"gemini-3.1-pro-high": "gemini-3.1-pro-high",
+	"gemini-3.1-pro-low":  "gemini-3.1-pro-low",
+	// Gemini 3.1 preview 映射
+	"gemini-3.1-pro-preview": "gemini-3.1-pro-high",
 	// 其他官方模型
 	"gpt-oss-120b-medium":    "gpt-oss-120b-medium",
 	"tab_flash_lite_preview": "tab_flash_lite_preview",

backend/internal/handler/gateway_handler.go

@@ -650,11 +650,6 @@ func (h *GatewayHandler) Messages(c *gin.Context) {
 					).Error("gateway.record_usage_failed", zap.Error(err))
 				}
 			})
-			reqLog.Debug("gateway.request_completed",
-				zap.Int64("account_id", account.ID),
-				zap.Int("switch_count", fs.SwitchCount),
-				zap.Bool("fallback_used", fallbackUsed),
-			)
 			return
 		}
 		if !retryWithFallback {

frontend/src/components/account/CreateAccountModal.vue

@@ -916,8 +916,8 @@
           <p class="input-hint">{{ t('admin.accounts.gemini.tier.aiStudioHint') }}</p>
         </div>
 
-        <!-- Model Restriction Section (不适用于 Gemini，Antigravity 已在上层条件排除) -->
+        <!-- Model Restriction Section (Antigravity 已在上层条件排除) -->
-        <div v-if="form.platform !== 'gemini'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
+        <div class="border-t border-gray-200 pt-4 dark:border-dark-600">
           <label class="input-label">{{ t('admin.accounts.modelRestriction') }}</label>
 
           <div
@@ -1200,34 +1200,6 @@
           </div>
         </div>
 
-        <!-- Gemini 模型说明 -->
-        <div v-if="form.platform === 'gemini'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
-          <div class="rounded-lg bg-blue-50 p-4 dark:bg-blue-900/20">
-            <div class="flex items-start gap-3">
-              <svg
-                class="h-5 w-5 flex-shrink-0 text-blue-600 dark:text-blue-400"
-                fill="none"
-                viewBox="0 0 24 24"
-                stroke="currentColor"
-              >
-                <path
-                  stroke-linecap="round"
-                  stroke-linejoin="round"
-                  stroke-width="2"
-                  d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
-                />
-              </svg>
-              <div>
-                <p class="text-sm font-medium text-blue-800 dark:text-blue-300">
-                  {{ t('admin.accounts.gemini.modelPassthrough') }}
-                </p>
-                <p class="mt-1 text-xs text-blue-700 dark:text-blue-400">
-                  {{ t('admin.accounts.gemini.modelPassthroughDesc') }}
-                </p>
-              </div>
-            </div>
-          </div>
-        </div>
       </div>
 
       <!-- Temp Unschedulable Rules -->
@@ -1378,9 +1350,9 @@
         </div>
       </div>
 
-      <!-- Intercept Warmup Requests (Anthropic only) -->
+      <!-- Intercept Warmup Requests (Anthropic/Antigravity) -->
       <div
-        v-if="form.platform === 'anthropic'"
+        v-if="form.platform === 'anthropic' || form.platform === 'antigravity'"
         class="border-t border-gray-200 pt-4 dark:border-dark-600"
       >
         <div class="flex items-center justify-between">
@@ -2562,8 +2534,8 @@ watch(
       antigravityModelMappings.value = []
       antigravityModelRestrictionMode.value = 'mapping'
     }
-    // Reset Anthropic-specific settings when switching to other platforms
+    // Reset Anthropic/Antigravity-specific settings when switching to other platforms
-    if (newPlatform !== 'anthropic') {
+    if (newPlatform !== 'anthropic' && newPlatform !== 'antigravity') {
       interceptWarmupRequests.value = false
     }
     if (newPlatform === 'sora') {
@@ -3117,15 +3089,8 @@ const handleSubmit = async () => {
 
     applyInterceptWarmup(credentials, interceptWarmupRequests.value, 'create')
 
-    submitting.value = true
-    try {
     const extra = mixedScheduling.value ? { mixed_scheduling: true } : undefined
     await createAccountAndFinish(form.platform, 'apikey', credentials, extra)
-    } catch (error: any) {
-      appStore.showError(error.response?.data?.detail || t('admin.accounts.failedToCreate'))
-    } finally {
-      submitting.value = false
-    }
     return
   }
 

frontend/src/components/account/EditAccountModal.vue

@@ -65,8 +65,8 @@
           <p class="input-hint">{{ t('admin.accounts.leaveEmptyToKeep') }}</p>
         </div>
 
-        <!-- Model Restriction Section (不适用于 Gemini 和 Antigravity) -->
+        <!-- Model Restriction Section (不适用于 Antigravity) -->
-        <div v-if="account.platform !== 'gemini' && account.platform !== 'antigravity'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
+        <div v-if="account.platform !== 'antigravity'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
           <label class="input-label">{{ t('admin.accounts.modelRestriction') }}</label>
 
           <div
@@ -349,34 +349,6 @@
           </div>
         </div>
 
-        <!-- Gemini 模型说明 -->
-        <div v-if="account.platform === 'gemini'" class="border-t border-gray-200 pt-4 dark:border-dark-600">
-          <div class="rounded-lg bg-blue-50 p-4 dark:bg-blue-900/20">
-            <div class="flex items-start gap-3">
-              <svg
-                class="h-5 w-5 flex-shrink-0 text-blue-600 dark:text-blue-400"
-                fill="none"
-                viewBox="0 0 24 24"
-                stroke="currentColor"
-              >
-                <path
-                  stroke-linecap="round"
-                  stroke-linejoin="round"
-                  stroke-width="2"
-                  d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"
-                />
-              </svg>
-              <div>
-                <p class="text-sm font-medium text-blue-800 dark:text-blue-300">
-                  {{ t('admin.accounts.gemini.modelPassthrough') }}
-                </p>
-                <p class="mt-1 text-xs text-blue-700 dark:text-blue-400">
-                  {{ t('admin.accounts.gemini.modelPassthroughDesc') }}
-                </p>
-              </div>
-            </div>
-          </div>
-        </div>
       </div>
 
       <!-- Upstream fields (only for upstream type) -->
@@ -641,9 +613,9 @@
         </div>
       </div>
 
-      <!-- Intercept Warmup Requests (Anthropic only) -->
+      <!-- Intercept Warmup Requests (Anthropic/Antigravity) -->
       <div
-        v-if="account?.platform === 'anthropic'"
+        v-if="account?.platform === 'anthropic' || account?.platform === 'antigravity'"
         class="border-t border-gray-200 pt-4 dark:border-dark-600"
       >
         <div class="flex items-center justify-between">

frontend/src/types/index.ts

@@ -581,6 +581,7 @@ export interface GeminiCredentials {
   token_type?: string
   scope?: string
   expires_at?: string
+  model_mapping?: Record<string, string>
 }
 
 export interface TempUnschedulableRule {