✨ feat: 应用界面重构 - 从模板中心到AI内容生成平台

- 重构首页：从模板列表展示改为AI功能展示界面
- 更新底部导航：将explore改为content，index改为home
- 新增多个页面：积分、兑换、历史记录、结果展示、设置等
- 优化UI组件：新增通用按钮、分类标签、加载状态等组件
- 清理冗余文件：删除旧的认证文档和积分详情页面
- 更新主题配置：调整配色方案和视觉风格
- 修复导入路径：优化组件导入结构

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

constants/theme.ts

@@ -41,6 +41,113 @@ export const Colors = {
     imagePlaceholder: '#2C2E2F',
     error: '#ff453a',
   },
+  brand: {
+    primary: '#007AFF',
+    secondary: '#4ECDC4',
+    points: '#FF6B6B',
+    success: '#07C160',
+    danger: '#FF4444',
+    warning: '#FF9500',
+  },
+  text: {
+    primary: '#333333',
+    secondary: '#666666',
+    tertiary: '#999999',
+  },
+  background: {
+    primary: '#F5F5F5',
+    secondary: '#FFFFFF',
+    tertiary: '#FAFAFA',
+  },
+  border: '#E0E0E0',
+};
+
+export const Spacing = {
+  xs: 4,
+  sm: 8,
+  md: 16,
+  lg: 20,
+  xl: 24,
+  xxl: 32,
+};
+
+export const BorderRadius = {
+  sm: 8,
+  md: 12,
+  lg: 16,
+  xl: 20,
+  xxl: 28,
+  full: 999,
+};
+
+export const FontSize = {
+  xs: 12,
+  sm: 14,
+  md: 16,
+  lg: 18,
+  xl: 20,
+  xxl: 24,
+  title: 28,
+};
+
+export const Shadow = {
+  small: {
+    shadowColor: '#000000',
+    shadowOffset: {
+      width: 0,
+      height: 2,
+    },
+    shadowOpacity: 0.05,
+    shadowRadius: 4,
+    elevation: 2,
+  },
+  medium: {
+    shadowColor: '#000000',
+    shadowOffset: {
+      width: 0,
+      height: 4,
+    },
+    shadowOpacity: 0.1,
+    shadowRadius: 8,
+    elevation: 4,
+  },
+  large: {
+    shadowColor: '#000000',
+    shadowOffset: {
+      width: 0,
+      height: 8,
+    },
+    shadowOpacity: 0.15,
+    shadowRadius: 12,
+    elevation: 8,
+  },
+};
+
+export const Animation = {
+  scale: {
+    pressed: 0.98,
+  },
+  duration: {
+    fast: 200,
+    normal: 300,
+    slow: 500,
+  },
+};
+
+export const Layout = {
+  headerHeight: 56,
+  buttonHeight: {
+    small: 36,
+    medium: 48,
+    large: 56,
+  },
+  tabBarHeight: 60,
+  safeAreaPadding: {
+    top: 16,
+    bottom: 16,
+    left: 16,
+    right: 16,
+  },
 };
 
 export const Fonts = Platform.select({
@@ -67,3 +174,13 @@ export const Fonts = Platform.select({
     mono: "SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
   },
 });
+
+export const Theme = {
+  colors: Colors,
+  spacing: Spacing,
+  borderRadius: BorderRadius,
+  fontSize: FontSize,
+  shadow: Shadow,
+  animation: Animation,
+  layout: Layout,
+};