fix(auth): return empty string from getAuthPassword for legacy null passwords (recaller hash_equals TypeError)

app/Models/User.php

@@ -80,6 +80,15 @@ class User extends Authenticatable implements FilamentUser
         return $this->hasMany(Post::class);
     }
 
+    /**
+     * 兼容老用户 password 为 null：remember-me 校验时 hash_equals 不接受 null，
+     * 返回空串使其校验失败并忽略 recaller，而不是抛 TypeError 造成全站 500。
+     */
+    public function getAuthPassword()
+    {
+        return $this->password ?? '';
+    }
+
     public function comments(): HasMany
     {
         return $this->hasMany(Comment::class);