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>

.gitignore

@@ -19,4 +19,8 @@ dist
 *.ntvs*
 *.njsproj
 *.sln
-*.sw?
+*.sw?
+# Dev artifacts
+.playwright-mcp/
+*.png
+!src/static/**/*.png