📦 添加虚拟环境和启动脚本

新增:
- backend/venv/ - Python 虚拟环境
- backend/start.sh - 启动脚本（使用虚拟环境）
- backend/requirements.txt - 依赖列表
- .gitignore - 忽略虚拟环境和缓存文件

说明:
- 每个项目使用独立虚拟环境
- 避免依赖冲突
- 启动脚本自动创建和激活虚拟环境

frontend/node_modules/tailwindcss/resolveConfig.d.ts

@@ -0,0 +1,31 @@
+import { Config, ResolvableTo, ThemeConfig } from './types/config'
+import { DefaultTheme } from './types/generated/default-theme'
+import { DefaultColors } from './types/generated/colors'
+
+type ResolvedConfig<T extends Config> = Omit<T, 'theme'> & {
+  theme: MergeThemes<
+    UnwrapResolvables<Omit<T['theme'], 'extend'>>,
+    T['theme'] extends { extend: infer TExtend } ? UnwrapResolvables<TExtend> : {}
+  >
+}
+
+type UnwrapResolvables<T> = {
+  [K in keyof T]: T[K] extends ResolvableTo<infer R> ? R : T[K]
+}
+
+type ThemeConfigResolved = UnwrapResolvables<ThemeConfig>
+type DefaultThemeFull = DefaultTheme & { colors: DefaultColors }
+
+type MergeThemes<Overrides extends object, Extensions extends object> = {
+  [K in keyof ThemeConfigResolved | keyof Overrides]: (K extends keyof Overrides
+    ? Overrides[K]
+    : K extends keyof DefaultThemeFull
+    ? DefaultThemeFull[K]
+    : K extends keyof ThemeConfigResolved
+    ? ThemeConfigResolved[K]
+    : never) &
+    (K extends keyof Extensions ? Extensions[K] : {})
+}
+
+declare function resolveConfig<T extends Config>(config: T): ResolvedConfig<T>
+export = resolveConfig