feat: 审核体系全面改造 — 多维度评分 + 卖点优先级 + AI 语义匹配 + 品牌方 AI 状态通知

后端:
- 审核结果拆分为 4 个独立维度 (法规合规/平台规则/品牌安全/Brief匹配度)
- 卖点优先级从 required:bool 改为三级 (core/recommended/reference)
- AI 语义匹配卖点覆盖 + AI 整体 Brief 匹配度分析
- BriefMatchDetail 评分详情 (覆盖率+亮点+问题点)
- min_selling_points 代理商可配置最少卖点数 + Alembic 迁移
- AI 语境复核过滤误报
- Brief AI 解析 + 规则 AI 解析
- AI 未配置/异常时通知品牌方
- 种子数据更新 (新格式审核结果+brief_match_detail)

前端:
- 三端审核页面展示四维度评分卡片
- 卖点编辑改为三级优先级选择器
- BriefMatchDetail 展示 (覆盖率进度条+亮点+问题)
- min_selling_points 配置 UI
- AI 配置页未配置时静默处理
- 文件预览/下载/签名 URL 优化

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/components/navigation/Sidebar.tsx

@@ -1,5 +1,6 @@
 'use client'
 
+import { useState, useEffect, useCallback } from 'react'
 import Link from 'next/link'
 import { usePathname } from 'next/navigation'
 import {
@@ -20,6 +21,8 @@ import {
   MessageSquare
 } from 'lucide-react'
 import { cn } from '@/lib/utils'
+import { api } from '@/lib/api'
+import { USE_MOCK } from '@/contexts/AuthContext'
 
 interface NavItem {
   icon: React.ElementType
@@ -40,7 +43,7 @@ const agencyNavItems: NavItem[] = [
   { icon: LayoutDashboard, label: '工作台', href: '/agency' },
   { icon: Scan, label: '审核台', href: '/agency/review' },
   { icon: MessageSquare, label: '申诉处理', href: '/agency/appeals' },
-  { icon: FileText, label: 'Brief 配置', href: '/agency/briefs' },
+  { icon: FileText, label: '任务配置', href: '/agency/briefs' },
   { icon: Users, label: '达人管理', href: '/agency/creators' },
   { icon: BarChart3, label: '数据报表', href: '/agency/reports' },
   { icon: Bell, label: '消息中心', href: '/agency/messages' },
@@ -66,22 +69,47 @@ interface SidebarProps {
 
 export function Sidebar({ role = 'creator', aiServiceError = false }: SidebarProps) {
   const pathname = usePathname() || ''
+  const [unreadCount, setUnreadCount] = useState(0)
 
-  // 根据 aiServiceError 动态设置 AI 配置的徽章
-  const getBrandNavItems = (): NavItem[] => {
-    return brandNavItems.map(item => {
+  const fetchUnreadCount = useCallback(async () => {
+    if (USE_MOCK) return
+    try {
+      const res = await api.getUnreadCount()
+      setUnreadCount(res.count)
+    } catch {
+      // 忽略错误（未登录等）
+    }
+  }, [])
+
+  useEffect(() => {
+    fetchUnreadCount()
+    const timer = setInterval(fetchUnreadCount, 30000) // 每 30 秒轮询
+    return () => clearInterval(timer)
+  }, [fetchUnreadCount])
+
+  // 消息中心路径
+  const messagesHref = `/${role}/messages`
+
+  // 根据 aiServiceError 和 unreadCount 动态设置徽章
+  const applyBadges = (items: NavItem[]): NavItem[] => {
+    return items.map(item => {
       if (item.href === '/brand/ai-config' && aiServiceError) {
         return { ...item, badge: 'warning' as const }
       }
+      if (item.href === messagesHref && unreadCount > 0) {
+        return { ...item, badge: 'dot' as const }
+      }
       return item
     })
   }
 
-  const navItems = role === 'creator'
+  const baseItems = role === 'creator'
     ? creatorNavItems
     : role === 'agency'
       ? agencyNavItems
-      : getBrandNavItems()
+      : brandNavItems
+
+  const navItems = applyBadges(baseItems)
 
   const isActive = (href: string) => {
     if (href === `/${role}`) {