refactor: 移除前端 Mock API，新增共享组件，优化认证流程

- 删除 mock_api_client、mock_calendar_service、mock_history_service
- 新增 fixed_length_code_input、link_button、message_composer 共享组件
- 优化登录/注册/密码重置页面使用新组件
- 简化 injection.dart 移除 mock 分支
- 更新 env.dart 配置（BACKEND_URL 替换 API_URL）
- 后端 agentscope 工具和测试更新
- 重构 AGENTS.md 文档结构
- 新增 deploy/ 目录和 protocol 文档

apps/AGENTS.md

@@ -2,6 +2,13 @@
 
 This document defines **hard constraints** for Flutter mobile development. Treat all items as **non-negotiable** unless explicitly overridden.
 
+## 0) Scope and Precedence (MUST)
+
+- This file applies to all changes under `apps/**`.
+- It extends root routing rules in `AGENTS.md` and workspace global runtime rules.
+- If rules conflict, apply the stricter requirement.
+- Keep Flutter-specific constraints in this file; avoid duplicating them in root `AGENTS.md`.
+
 ## 1) Design Tokens (MUST)
 
 - **MUST** use design tokens from `apps/lib/core/theme/design_tokens.dart`:
@@ -32,13 +39,17 @@ This document defines **hard constraints** for Flutter mobile development. Treat
 - If persistent header/footer regions exist, **MUST** center primary content within the remaining usable region.
 - **MUST** prioritize *visual centering* over purely geometric centering when they differ.
 
-## 5) Quality Gate for Important Screens (MUST)
+## 5) Testing Strategy (MUST)
 
-For important screens:
+Follow lightweight testing strategy - prioritize value over coverage:
 
-- **MUST** add widget tests to reduce layout regression risk:
-  - Verify primary content stays centered relative to the usable viewport.
-  - Include at least one constrained scenario (e.g., small height **or** large text scale).
+**Write tests for:**
+- Model / DTO parsing (json → model)
+- Service layer logic (business rules, API call handling)
+- Complex custom widgets with rich interactions
+
+**Skip for:**
+- Simple UI pages, regular buttons, basic layouts
 
 ## 6) UI Feedback System (MUST)
 
@@ -62,9 +73,3 @@ Agent chat functionality **MUST** follow the AG-UI protocol. **Use the `ag-ui` s
 - **MUST NOT** return non-streaming responses for agent chat.
 - **MUST NOT** omit required lifecycle events.
 - **MUST NOT** use non-AG-UI event formats (except where the spec explicitly allows).
-
-## 8) Debugging Behavior (MUST)
-
-- **MUST NOT** automatically start Flutter app debugging or running.
-- After code changes, **MUST** instruct the user to run manually (user-controlled):
-  - `flutter run --dart-define=MOCK_API=true -d emulator-5554`