feat: 小程序UI重构为Apple设计系统并添加tabBar

- 全局样式重构为Apple Design System风格
- 添加底部tabBar导航(首页/发布/历史/私信/我的)
- 更紧凑的spacing和更小的字体尺寸
- pill圆角按钮和状态标签
- Action Blue (#0066cc) 单一accent色
- 添加tabBar图标资源

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

miniprogram/app.json

@@ -1,13 +1,13 @@
 {
   "pages": [
-    "pages/login/index",
-    "pages/register/index",
     "pages/home/index",
     "pages/detect/index",
-    "pages/batch/index",
     "pages/history/index",
     "pages/inbox/index",
     "pages/profile/index",
+    "pages/login/index",
+    "pages/register/index",
+    "pages/batch/index",
     "pages/admin-dashboard/index",
     "pages/admin-review/index",
     "pages/admin-users/index",
@@ -15,11 +15,49 @@
   ],
   "window": {
     "navigationBarTitleText": "内容风控平台",
-    "navigationBarBackgroundColor": "#0A1A2D",
-    "navigationBarTextStyle": "white",
-    "backgroundTextStyle": "light",
-    "backgroundColor": "#EEF3F8"
+    "navigationBarBackgroundColor": "#ffffff",
+    "navigationBarTextStyle": "black",
+    "backgroundTextStyle": "dark",
+    "backgroundColor": "#f5f5f7"
+  },
+  "tabBar": {
+    "color": "#86868b",
+    "selectedColor": "#0066cc",
+    "backgroundColor": "#ffffff",
+    "borderStyle": "white",
+    "list": [
+      {
+        "pagePath": "pages/home/index",
+        "text": "首页",
+        "iconPath": "assets/icons/home.png",
+        "selectedIconPath": "assets/icons/home-active.png"
+      },
+      {
+        "pagePath": "pages/detect/index",
+        "text": "发布",
+        "iconPath": "assets/icons/publish.png",
+        "selectedIconPath": "assets/icons/publish-active.png"
+      },
+      {
+        "pagePath": "pages/history/index",
+        "text": "历史",
+        "iconPath": "assets/icons/history.png",
+        "selectedIconPath": "assets/icons/history-active.png"
+      },
+      {
+        "pagePath": "pages/inbox/index",
+        "text": "私信",
+        "iconPath": "assets/icons/inbox.png",
+        "selectedIconPath": "assets/icons/inbox-active.png"
+      },
+      {
+        "pagePath": "pages/profile/index",
+        "text": "我的",
+        "iconPath": "assets/icons/profile.png",
+        "selectedIconPath": "assets/icons/profile-active.png"
+      }
+    ]
   },
   "style": "v2",
   "sitemapLocation": "sitemap.json"
-}
+}