feat(auth): 实现登录认证和权限控制功能

- 添加用户登录和登出功能
- 实现 Token 过期和无效的错误处理
- 添加路由权限控制，未登录用户重定向到登录页
- 优化登录失败的错误提示
- 修复搜索功能的返回数据问题

biji-houdaun/src/main/java/com/test/bijihoudaun/controller/UserController.java

@@ -13,6 +13,7 @@ import io.swagger.v3.oas.annotations.Parameters;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.authentication.BadCredentialsException;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.web.bind.annotation.*;
 
@@ -57,10 +58,14 @@ public class UserController {
     })
     @PostMapping("/login")
     public R<Map<String, String>> login(String username, String password){
-        String token = userService.login(username, password);
-        Map<String, String> tokenMap = new HashMap<>();
-        tokenMap.put("token", token);
-        return R.success(tokenMap);
+        try {
+            String token = userService.login(username, password);
+            Map<String, String> tokenMap = new HashMap<>();
+            tokenMap.put("token", token);
+            return R.success(tokenMap);
+        } catch (BadCredentialsException e) {
+            return R.fail("用户名或密码错误");
+        }
     }
 
     @Operation(summary = "删除当前登录的用户")