创建了api目录并拆分为10个功能模块文件

建立了index.ts统一导出
精简了原api.ts文件

client/mobile/api/theme.ts

@@ -0,0 +1,39 @@
+import axios from 'axios';
+import type { 
+  ThemeSettings
+} from '../../share/types.ts';
+
+const API_BASE_URL = '/api';
+
+// Theme API 定义
+export const ThemeAPI = {
+  // 获取主题设置
+  getThemeSettings: async (): Promise<ThemeSettings> => {
+    try {
+      const response = await axios.get(`${API_BASE_URL}/theme`);
+      return response.data.data;
+    } catch (error) {
+      throw error;
+    }
+  },
+
+  // 更新主题设置
+  updateThemeSettings: async (themeData: Partial<ThemeSettings>): Promise<ThemeSettings> => {
+    try {
+      const response = await axios.put(`${API_BASE_URL}/theme`, themeData);
+      return response.data.data;
+    } catch (error) {
+      throw error;
+    }
+  },
+
+  // 重置主题设置
+  resetThemeSettings: async (): Promise<ThemeSettings> => {
+    try {
+      const response = await axios.post(`${API_BASE_URL}/theme/reset`);
+      return response.data.data;
+    } catch (error) {
+      throw error;
+    }
+  }
+};