fix(frontend): deduplicate Antigravity quota groups

frontend/src/i18n/messages.ts

@@ -334,6 +334,8 @@ export const messages = {
     'nav.cacheMonitoring': '缓存监控',
     'nav.moduleManagement': '模块管理',
     'nav.systemSettings': '系统设置',
+    'providers.antigravity.quota.period.weekly': '周',
+    'providers.antigravity.quota.period.fiveHours': '5小时',
     'providers.modelMapping.scope.allRequests': '所有请求',
     'providers.modelMapping.scope.sessionCompactionOnly': '仅会话压缩',
     'providers.modelMapping.scope.customOperations': '仅匹配：{operations}',
@@ -684,6 +686,8 @@ export const messages = {
     'nav.cacheMonitoring': 'Cache monitoring',
     'nav.moduleManagement': 'Modules',
     'nav.systemSettings': 'System settings',
+    'providers.antigravity.quota.period.weekly': 'Weekly',
+    'providers.antigravity.quota.period.fiveHours': '5 Hours',
     'providers.modelMapping.scope.allRequests': 'All requests',
     'providers.modelMapping.scope.sessionCompactionOnly': 'Session compaction only',
     'providers.modelMapping.scope.customOperations': 'Match only: {operations}',