feat: 添加视觉设计语言系统并重构认证页面UI

- 新增 visual_design_language.md 设计规范文档
- 新增 auth 设计 tokens (authBackground, authCard, authInput, feedback 系列等)
- 重构登录/注册/验证码/重置密码页面为新设计系统
- 新增 AuthHeroHeader, AuthSurfaceCard, AuthSection, AuthField, PasswordField 组件
- 重构 AppBanner 和 Toast 支持多类型配置 (info/success/warning/error)
- 后端 AgentScope: 重整 schemas/prompts/tools 作用域, 新增协议文档
- 更新 AGENTS.md 集成视觉设计语言约束

backend/src/v1/friendships/repository.py

@@ -11,6 +11,7 @@ from core.db.base_repository import BaseRepository
 from core.logging import get_logger
 from models.friendships import Friendship, FriendshipStatus
 from models.inbox_messages import InboxMessage, InboxMessageStatus, InboxMessageType
+from schemas.inbox.messages import FriendshipContent
 
 if TYPE_CHECKING:
     from sqlalchemy.ext.asyncio import AsyncSession
@@ -80,7 +81,7 @@ class SQLAlchemyFriendshipRepository(BaseRepository[Friendship]):
         super().__init__(session, Friendship)
 
     async def create_request(
-        self, initiator_id: UUID, recipient_id: UUID, content: str | None = None
+        self, initiator_id: UUID, recipient_id: UUID, message: str | None = None
     ) -> tuple[Friendship, InboxMessage]:
         try:
             user_low_id = min(initiator_id, recipient_id)
@@ -99,12 +100,13 @@ class SQLAlchemyFriendshipRepository(BaseRepository[Friendship]):
             self._session.add(friendship)
             await self._session.flush()
 
+            inbox_content = FriendshipContent(type="request", message=message)
             inbox = InboxMessage(
                 recipient_id=recipient_id,
                 sender_id=initiator_id,
                 message_type=InboxMessageType.FRIEND_REQUEST,
                 friendship_id=friendship.id,
-                content=content,
+                content=inbox_content.model_dump(),
                 status=InboxMessageStatus.PENDING,
                 created_by=initiator_id,
             )
@@ -124,7 +126,7 @@ class SQLAlchemyFriendshipRepository(BaseRepository[Friendship]):
         self,
         friendship: Friendship,
         initiator_id: UUID,
-        content: str | None = None,
+        message: str | None = None,
     ) -> tuple[Friendship, InboxMessage]:
         try:
             now = datetime.now(timezone.utc)
@@ -133,6 +135,7 @@ class SQLAlchemyFriendshipRepository(BaseRepository[Friendship]):
             friendship.initiator_id = initiator_id
             friendship.updated_by = initiator_id
 
+            inbox_content = FriendshipContent(type="request", message=message)
             inbox = InboxMessage(
                 recipient_id=(
                     friendship.user_low_id
@@ -142,7 +145,7 @@ class SQLAlchemyFriendshipRepository(BaseRepository[Friendship]):
                 sender_id=initiator_id,
                 message_type=InboxMessageType.FRIEND_REQUEST,
                 friendship_id=friendship.id,
-                content=content,
+                content=inbox_content.model_dump(),
                 status=InboxMessageStatus.PENDING,
                 created_by=initiator_id,
             )

backend/src/v1/friendships/schemas.py

@@ -20,7 +20,7 @@ class FriendRequestResponse(BaseModel):
     id: UUID
     sender: UserContext
     recipient: UserContext
-    content: str | None
+    content: dict | None
     status: Literal["pending", "accepted", "rejected", "canceled"]
     created_at: datetime