feat: apply UI/storage/share optimizations and quota improvements

backend/auth.js

@@ -2,6 +2,8 @@ const jwt = require('jsonwebtoken');
 const crypto = require('crypto');
 const { UserDB } = require('./database');
 const { decryptSecret } = require('./utils/encryption');
+const DEFAULT_LOCAL_STORAGE_QUOTA_BYTES = 1024 * 1024 * 1024; // 1GB
+const DEFAULT_OSS_STORAGE_QUOTA_BYTES = 1024 * 1024 * 1024; // 1GB
 
 // JWT密钥（必须在环境变量中设置）
 const JWT_SECRET = process.env.JWT_SECRET || 'your-secret-key-change-in-production';
@@ -169,6 +171,11 @@ function authMiddleware(req, res, next) {
       });
     }
 
+    const rawOssQuota = Number(user.oss_storage_quota);
+    const effectiveOssQuota = Number.isFinite(rawOssQuota) && rawOssQuota > 0
+      ? rawOssQuota
+      : DEFAULT_OSS_STORAGE_QUOTA_BYTES;
+
     // 将用户信息附加到请求对象（包含所有存储相关字段）
     req.user = {
       id: user.id,
@@ -187,8 +194,10 @@ function authMiddleware(req, res, next) {
       // 存储相关字段
       storage_permission: user.storage_permission || 'oss_only',
       current_storage_type: user.current_storage_type || 'oss',
-      local_storage_quota: user.local_storage_quota || 1073741824,
+      local_storage_quota: user.local_storage_quota || DEFAULT_LOCAL_STORAGE_QUOTA_BYTES,
       local_storage_used: user.local_storage_used || 0,
+      oss_storage_quota: effectiveOssQuota,
+      storage_used: user.storage_used || 0,
       // 主题偏好
       theme_preference: user.theme_preference || null
     };