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/core/config/initial/init_data.py

@@ -9,7 +9,7 @@ from pydantic import BaseModel, ValidationError
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from core.agentscope.schemas.system_agent_config import SystemAgentLLMConfig
+from schemas.agent.system_agent import SystemAgentLLMConfig
 from core.db.session import AsyncSessionLocal
 from core.logging import get_logger
 from models.llm import Llm

backend/src/core/config/static/database/system_agents.yaml

@@ -1,14 +1,16 @@
 agents:
-  - agent_type: INTENT_RECOGNITION
-    llm_model_code: qwen3.5-flash
-    status: active
-    config:
-      temperature: 0.7
-      max_tokens: null
+    - agent_type: router
+      llm_model_code: qwen3.5-flash
+      status: active
+      config:
+          temperature: 0.7
+          max_tokens: null
+          timeout_seconds: 30
 
-  - agent_type: TASK_EXECUTION
-    llm_model_code: deepseek-chat
-    status: active
-    config:
-      temperature: 0.7
-      max_tokens: null
+    - agent_type: worker
+      llm_model_code: deepseek-chat
+      status: active
+      config:
+          temperature: 0.7
+          max_tokens: null
+          timeout_seconds: 30