feat: UI redesign with uv-ui color system and landscape imagery

- Replace all colors with uv-ui design tokens (primary #3c9cff, warning #f9ae3d, etc.)
- Hero section: Wugong Mountain landscape photo with dark overlay
- Super Player card: photo background, large typography, warning-color price/CTA, value comparison (¥198 vs ¥3800+)
- Spots section: landscape thumbnails instead of CSS gradients, warning-color prices
- Profile page: landscape hero header, CSS menu icons, floating card layout
- Card list page: landscape hero header, filter pills, empty state design
- TabBar: rename '入园码' to '旅游卡', Lucide-style PNG icons (home/card/profile)
- Typography: corrected font weights (semibold for prices, medium for labels)
- Remove broken font-loader (lxgw-wen-kai CDN 404)
- Skip wx.getPrivacySetting in devtools to avoid framework timeout
- Replace all inline SVG with CSS-only icons for mini-program compatibility
- Add design system files (styles/, components/, animations)

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

src/pages.json

@@ -78,11 +78,11 @@
     "navigationBarTextStyle": "black",
     "navigationBarTitleText": "爱上萍乡",
     "navigationBarBackgroundColor": "#FFFFFF",
-    "backgroundColor": "#F5F5F5"
+    "backgroundColor": "#FAFAFA"
   },
   "tabBar": {
     "color": "#7A7E83",
-    "selectedColor": "#4A90D9",
+    "selectedColor": "#3c9cff",
     "borderStyle": "white",
     "backgroundColor": "#ffffff",
     "list": [
@@ -94,9 +94,9 @@
       },
       {
         "pagePath": "pages/qrcode/index",
-        "text": "入园码",
-        "iconPath": "static/tabbar/qrcode.png",
-        "selectedIconPath": "static/tabbar/qrcode-active.png"
+        "text": "旅游卡",
+        "iconPath": "static/tabbar/card.png",
+        "selectedIconPath": "static/tabbar/card-active.png"
       },
       {
         "pagePath": "pages/profile/index",