feat: 修复 H5 底部导航覆盖 + 更新项目进度文档

## H5 底部导航修复 (Bug #10)
- 精简 App.vue，移除重复 tabbar，仅保留全局样式
- uni-page 设置 height: calc(100% - 50px) + overflow-y: auto
- 内容区域精确停在底部导航上方，独立滚动不再叠加
- 恢复 custom-tab-bar 组件

## 项目进度文档
- PROGRESS.md 更新至 10 个 Bug 修复
- 新增 H5 底部导航修复记录
- 新增历史变更条目

backend/app/core/security.py

@@ -1,18 +1,24 @@
 from datetime import datetime, timedelta
 from typing import Optional
 from jose import JWTError, jwt
-from passlib.context import CryptContext
+import bcrypt
 from app.config import settings
 
-pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
-
 
 def verify_password(plain: str, hashed: str) -> bool:
-    return pwd_context.verify(plain, hashed)
+    try:
+        password_bytes = plain.encode("utf-8")
+        if isinstance(hashed, str):
+            hashed = hashed.encode("utf-8")
+        return bcrypt.checkpw(password_bytes, hashed)
+    except Exception:
+        return False
 
 
 def hash_password(password: str) -> str:
-    return pwd_context.hash(password)
+    password_bytes = password[:72].encode("utf-8")
+    salt = bcrypt.gensalt()
+    return bcrypt.hashpw(password_bytes, salt).decode("utf-8")
 
 
 def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str: