feat: 优化 AI 教练聊天和打卡功能

- 在 AI 教练聊天界面中添加会话缓存功能，支持冷启动时恢复聊天记录
- 实现轻量防抖机制，确保会话变动时及时保存缓存
- 在打卡功能中集成按月加载打卡记录，提升用户体验
- 更新 Redux 状态管理，支持打卡记录的按月加载和缓存
- 新增打卡日历页面，允许用户查看每日打卡记录
- 优化样式以适应新功能的展示和交互

services/cos.ts

@@ -1,6 +1,18 @@
-import { COS_BUCKET, COS_REGION } from '@/constants/Cos';
+import { COS_BUCKET, COS_REGION, buildPublicUrl } from '@/constants/Cos';
 import { api } from '@/services/api';
 
+type ServerCosToken = {
+  tmpSecretId: string;
+  tmpSecretKey: string;
+  sessionToken: string;
+  startTime?: number;
+  expiredTime?: number;
+  bucket?: string;
+  region?: string;
+  prefix?: string;
+  cdnDomain?: string;
+};
+
 type CosCredential = {
   credentials: {
     tmpSecretId: string;
@@ -9,6 +21,10 @@ type CosCredential = {
   };
   startTime?: number;
   expiredTime?: number;
+  bucket?: string;
+  region?: string;
+  prefix?: string;
+  cdnDomain?: string;
 };
 
 type UploadOptions = {
@@ -23,23 +39,63 @@ let CosSdk: any | null = null;
 
 async function ensureCosSdk(): Promise<any> {
   if (CosSdk) return CosSdk;
-  // 动态导入避免影响首屏
-  const mod = await import('cos-js-sdk-v5');
-  CosSdk = mod.default ?? mod;
+  // RN 兼容：SDK 在初始化时会访问 navigator.userAgent
+  const g: any = globalThis as any;
+  if (!g.navigator) g.navigator = {};
+  if (!g.navigator.userAgent) g.navigator.userAgent = 'react-native';
+  // 动态导入避免影响首屏，并加入 require 回退，兼容打包差异
+  let mod: any = null;
+  try {
+    mod = await import('cos-js-sdk-v5');
+  } catch (_) {
+    try {
+      // eslint-disable-next-line @typescript-eslint/no-var-requires
+      mod = require('cos-js-sdk-v5');
+    } catch { }
+  }
+  const Candidate = mod?.COS || mod?.default || mod;
+  if (!Candidate) {
+    throw new Error('cos-js-sdk-v5 加载失败');
+  }
+  CosSdk = Candidate;
   return CosSdk;
 }
 
 async function fetchCredential(): Promise<CosCredential> {
-  return await api.get<CosCredential>('/users/cos-token');
+  // 后端返回 { code, message, data }，api.get 会提取 data
+  const data = await api.get<ServerCosToken>('/api/users/cos/upload-token');
+  return {
+    credentials: {
+      tmpSecretId: data.tmpSecretId,
+      tmpSecretKey: data.tmpSecretKey,
+      sessionToken: data.sessionToken,
+    },
+    startTime: data.startTime,
+    expiredTime: data.expiredTime,
+    bucket: data.bucket,
+    region: data.region,
+    prefix: data.prefix,
+    cdnDomain: data.cdnDomain,
+  };
 }
 
-export async function uploadToCos(options: UploadOptions): Promise<{ key: string; etag?: string; headers?: Record<string, string> }> {
+export async function uploadToCos(options: UploadOptions): Promise<{ key: string; etag?: string; headers?: Record<string, string>; publicUrl?: string }> {
   const { key, body, contentType, onProgress, signal } = options;
-  if (!COS_BUCKET || !COS_REGION) {
-    throw new Error('未配置 COS_BUCKET / COS_REGION');
-  }
   const COS = await ensureCosSdk();
   const cred = await fetchCredential();
+  const bucket = COS_BUCKET || cred.bucket;
+  const region = COS_REGION || cred.region;
+  if (!bucket || !region) {
+    throw new Error('未配置 COS_BUCKET / COS_REGION，且服务端未返回 bucket/region');
+  }
+
+  // 确保对象键以服务端授权的前缀开头
+  const finalKey = ((): string => {
+    const prefix = (cred.prefix || '').replace(/^\/+|\/+$/g, '');
+    if (!prefix) return key.replace(/^\//, '');
+    const normalizedKey = key.replace(/^\//, '');
+    return normalizedKey.startsWith(prefix + '/') ? normalizedKey : `${prefix}/${normalizedKey}`;
+  })();
 
   const controller = new AbortController();
   if (signal) {
@@ -62,9 +118,9 @@ export async function uploadToCos(options: UploadOptions): Promise<{ key: string
 
     const task = cos.putObject(
       {
-        Bucket: COS_BUCKET,
-        Region: COS_REGION,
-        Key: key,
+        Bucket: bucket,
+        Region: region,
+        Key: finalKey,
         Body: body,
         ContentType: contentType,
         onProgress: (progressData: any) => {
@@ -76,7 +132,10 @@ export async function uploadToCos(options: UploadOptions): Promise<{ key: string
       },
       (err: any, data: any) => {
         if (err) return reject(err);
-        resolve({ key, etag: data && data.ETag, headers: data && data.headers });
+        const publicUrl = cred.cdnDomain
+          ? `${String(cred.cdnDomain).replace(/\/$/, '')}/${finalKey.replace(/^\//, '')}`
+          : buildPublicUrl(finalKey);
+        resolve({ key: finalKey, etag: data && data.ETag, headers: data && data.headers, publicUrl });
       }
     );