feat: 新增 Kiro 适配器、OAuth 改进与多项功能增强

- 新增 Kiro provider 适配器（EventStream 协议解析、令牌管理、用量追踪）
- 重构 OAuth 账户管理与统一配额机制
- 重构 Handler 基类（CLI adapter/handler、请求构建器、流处理器）
- 增强缓存监控后端 API 与前端可视化
- 改进 Gemini 格式标准化器与请求头处理
- Antigravity/Codex 适配器更新，移除旧 metadata_collector
- 新增数据库迁移：proxy provider API keys
- 前端 UI 多项优化

Co-Authored-By: AAEE86 <ppk0227@hotmail.com>

frontend/src/views/public/guide/AdvancedGuide.vue

@@ -3,7 +3,7 @@ import { RouterLink } from 'vue-router'
 import { ArrowRight, Shuffle, FileCode, Globe, Shield, Check, Info, AlertTriangle, Settings } from 'lucide-vue-next'
 import { panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),

frontend/src/views/public/guide/GuideFaq.vue

@@ -3,7 +3,7 @@ import { ref, computed } from 'vue'
 import { Search, ChevronDown, ExternalLink, HelpCircle } from 'lucide-vue-next'
 import { faqItems, panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),
@@ -18,12 +18,6 @@ const searchQuery = ref('')
 // 展开的 FAQ
 const expandedIds = ref<Set<string>>(new Set())
 
-// 分类列表
-const categories = computed(() => {
-  const cats = new Set(faqItems.map(item => item.category))
-  return Array.from(cats)
-})
-
 // 过滤后的 FAQ
 const filteredFaqs = computed(() => {
   if (!searchQuery.value.trim()) {

frontend/src/views/public/guide/ModelGuide.vue

@@ -3,7 +3,7 @@ import { RouterLink } from 'vue-router'
 import { ArrowRight, Layers, Check, Info, Shuffle, TrendingUp, Gauge, Clock } from 'lucide-vue-next'
 import { loadBalanceModes, panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),

frontend/src/views/public/guide/Overview.vue

@@ -3,7 +3,7 @@ import { RouterLink } from 'vue-router'
 import { ArrowRight, Server, Layers, Key, Box, ChevronRight } from 'lucide-vue-next'
 import { coreConcepts, apiFormats, configSteps, panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),

frontend/src/views/public/guide/ProviderGuide.vue

@@ -1,9 +1,9 @@
 <script setup lang="ts">
 import { RouterLink } from 'vue-router'
-import { ArrowRight, Server, Plus, Settings, Check, AlertTriangle, Info } from 'lucide-vue-next'
+import { ArrowRight, Server, Settings, Check, AlertTriangle, Info } from 'lucide-vue-next'
 import { apiFormats, panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),

frontend/src/views/public/guide/UserKeyGuide.vue

@@ -3,7 +3,7 @@ import { RouterLink } from 'vue-router'
 import { ArrowRight, Users, Key, Shield, Check, Info, AlertTriangle, Clock } from 'lucide-vue-next'
 import { panelClasses } from './guide-config'
 
-const props = withDefaults(
+withDefaults(
   defineProps<{
     baseUrl?: string
   }>(),
@@ -12,14 +12,6 @@ const props = withDefaults(
   }
 )
 
-// 用户字段说明
-const userFields = [
-  { name: '用户名/邮箱', description: '用户的登录凭证', required: true },
-  { name: '角色', description: '普通用户或管理员', required: true },
-  { name: '状态', description: '启用/禁用用户', required: false },
-  { name: '默认配额', description: '该用户创建的 Key 默认继承的配额设置', required: false }
-]
-
 // API Key 字段说明
 const keyFields = [
   { name: '名称', description: 'Key 的描述性名称，方便识别', required: true },