feat: 现代化翻页组件 + 完整项目更新

- 新增 Pagination 通用组件：首页/上一页/页码/下一页/末页导航
- PickModal 和 SwapModal 集成分页功能，每页20项
- 搜索/筛选切换自动回到第1页
- 现代化CSS样式：hover浮起动效、主色高亮、移动端适配
- 新增 dashboard、admin 管理模板
- 菜系(cuisine)模型和迁移
- 构建脚本 build.py 支持 PyInstaller 打包
- 前端资源重新构建

fix_run.py

@@ -0,0 +1,21 @@
+import os
+
+FILE = r"C:\Users\12914\Desktop\school-meal\run.py"
+with open(FILE, "r", encoding="utf-8") as f:
+    content = f.read()
+
+# The setup_environment function has: sys.path.insert(0, base)
+# But base is the project root. The config module is in backend/.
+# In dev mode, we need to also add backend/ to sys.path.
+old = "    sys.path.insert(0, base)\n    os.environ.setdefault"
+new = "    sys.path.insert(0, base)\n    # In dev mode, add backend/ to path so config and meals are importable\n    backend_dir = os.path.join(base, 'backend')\n    if os.path.isdir(backend_dir) and backend_dir not in sys.path:\n        sys.path.insert(0, backend_dir)\n    os.environ.setdefault"
+
+if old in content:
+    content = content.replace(old, new, 1)
+    print("Fixed sys.path")
+else:
+    print("Pattern not found")
+
+with open(FILE, "w", encoding="utf-8") as f:
+    f.write(content)
+print("Done")