feat(auth): implement cookie-based token management and update user ID retrieval

Api/BaseApiController.cs

@@ -1,6 +1,9 @@
 using Microsoft.AspNetCore.Mvc;
 using Foxel.Models;
 using System.Security.Claims;
+using System.IdentityModel.Tokens.Jwt;
+using Microsoft.IdentityModel.Tokens;
+using System.Text;
 
 namespace Foxel.Controllers
 {
@@ -14,6 +17,37 @@ namespace Foxel.Controllers
             return userIdClaim != null ? int.Parse(userIdClaim) : null;
         }
 
+        protected int? GetUserIdFromCookie()
+        {
+            try
+            {
+                var token = Request.Cookies["token"];
+                if (string.IsNullOrEmpty(token))
+                {
+                    return null;
+                }
+
+                var tokenHandler = new JwtSecurityTokenHandler();
+                if (!tokenHandler.CanReadToken(token))
+                {
+                    return null;
+                }
+
+                var jwtToken = tokenHandler.ReadJwtToken(token);
+                var userIdClaim = jwtToken.Claims.FirstOrDefault(x => x.Type == ClaimTypes.NameIdentifier)?.Value;
+                if (userIdClaim != null && int.TryParse(userIdClaim, out var userId))
+                {
+                    return userId;
+                }
+            }
+            catch (Exception)
+            {
+                return null;
+            }
+
+            return null;
+        }
+
         protected ActionResult<BaseResult<T>> Success<T>(T data, string message = "操作成功", int statusCode = 200)
         {
             return Ok(new BaseResult<T>