docs: add bug fix design for TRIGGER-001 and TOKEN-001

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# Bug Fix Design: TRIGGER-001 & TOKEN-001
**Date:** 2026-03-02
**Author:** AI Assistant
**Status:** Approved
## Overview
解决 `docs/bugs/backlog.md` 中的两个 bug
1. TRIGGER-001: user_agents 自动创建
2. TOKEN-001: Flutter 硬编码颜色迁移
## TRIGGER-001: user_agents 自动创建
### Problem
新用户注册时,`user_agents` 表未自动创建默认 Agent 配置记录,导致首次使用 Agent Chat 功能失败。
### Solution
创建配置驱动的自动初始化机制:
- YAML 配置文件定义默认 agent 配置
- 数据库 catalog 表存储配置(持久化)
- Trigger 从 catalog 表读取并批量插入
- 应用启动时自动同步 YAML → catalog 表
### Architecture
```
user_agent_catalog.yaml
↓ (应用启动时)
initialize_user_agent_catalog()
↓ (upsert)
user_agent_catalog 表
↓ (Trigger 查询)
新用户注册 → create_profile_for_new_user()
├─→ 插入 profiles
└─→ 批量插入 user_agents (3条)
```
### Data Model
#### 1. user_agent_catalog.yaml
```yaml
agents:
- agent_type: INTENT_RECOGNITION
llm_model_code: qwen3.5-flash
status: active
config:
temperature: 0.7
- agent_type: TASK_EXECUTION
llm_model_code: deepseek-v3.2
status: active
config:
temperature: 0.7
- agent_type: RESULT_REPORTING
llm_model_code: deepseek-v3.2
status: active
config:
temperature: 0.7
```
#### 2. user_agent_catalog 表
```sql
CREATE TABLE user_agent_catalog (
agent_type VARCHAR(20) PRIMARY KEY,
llm_id UUID NOT NULL REFERENCES llms(id) ON DELETE RESTRICT,
status VARCHAR(20) NOT NULL DEFAULT 'active',
config JSONB NOT NULL DEFAULT '{}',
created_at TIMESTAMPTZ DEFAULT now(),
updated_at TIMESTAMPTZ DEFAULT now(),
CONSTRAINT chk_status CHECK (status IN ('active', 'paused', 'migrating'))
);
```
**字段说明:**
- `agent_type`: 主键,agent 类型(INTENT_RECOGNITION / TASK_EXECUTION / RESULT_REPORTING
- `llm_id`: 外键,关联 llms 表
- `status`: 默认状态(active / paused / migrating
- `config`: 默认配置(JSONB,包含 temperature 等)
#### 3. Trigger 函数
```sql
CREATE OR REPLACE FUNCTION create_profile_for_new_user()
RETURNS trigger AS $$
BEGIN
-- 插入 profile(现有逻辑)
INSERT INTO profiles (id, username, avatar_url, bio, settings, created_at, updated_at)
VALUES (
NEW.id,
COALESCE(
NEW.raw_user_meta_data ->> 'username',
split_part(NEW.email, '@', 1),
'user_' || substring(NEW.id::text, 1, 8)
),
NULL, NULL, '{}'::jsonb, now(), now()
)
ON CONFLICT (id) DO NOTHING;
-- 从 user_agent_catalog 批量插入 user_agents
INSERT INTO user_agents (id, user_id, llm_id, agent_type, config, status, created_by, updated_by)
SELECT
gen_random_uuid(),
NEW.id,
uac.llm_id,
uac.agent_type,
uac.config,
uac.status,
NEW.id,
NEW.id
FROM user_agent_catalog uac;
RETURN NEW;
END;
$$ LANGUAGE plpgsql SECURITY DEFINER SET search_path = public;
```
### Implementation Components
#### 1. Python Model
```python
# backend/src/models/user_agent_catalog.py
class UserAgentCatalog(TimestampMixin, Base):
__tablename__ = "user_agent_catalog"
agent_type: Mapped[str] = mapped_column(String(20), primary_key=True)
llm_id: Mapped[uuid.UUID] = mapped_column(UUID, ForeignKey("llms.id"), nullable=False)
status: Mapped[str] = mapped_column(String(20), nullable=False)
config: Mapped[dict] = mapped_column(JSONB, nullable=False, server_default="{}")
```
#### 2. 初始化函数
```python
# backend/src/core/config/initial/init_data.py
class UserAgentCatalogSeed(BaseModel):
agent_type: str
llm_model_code: str
status: str
config: dict[str, Any]
def load_user_agent_catalog(catalog_path: Path | None = None) -> dict[str, Any]:
path = catalog_path or _default_user_agent_catalog_path()
with path.open("r", encoding="utf-8") as file:
loaded = yaml.safe_load(file) or {}
# ... validation logic
return parsed.model_dump()
async def initialize_user_agent_catalog() -> None:
catalog = load_user_agent_catalog()
async with AsyncSessionLocal() as session:
async with session.begin():
for agent in catalog["agents"]:
# 查找 llm_id
llm = await session.execute(
select(Llm).where(Llm.model_code == agent["llm_model_code"])
)
llm_id = llm.scalar_one().id
# Upsert
existing = await session.execute(
select(UserAgentCatalog).where(
UserAgentCatalog.agent_type == agent["agent_type"]
)
)
catalog_entry = existing.scalar_one_or_none()
if catalog_entry:
catalog_entry.llm_id = llm_id
catalog_entry.status = agent["status"]
catalog_entry.config = agent["config"]
else:
session.add(UserAgentCatalog(
agent_type=agent["agent_type"],
llm_id=llm_id,
status=agent["status"],
config=agent["config"]
))
logger.info("Initialized user agent catalog")
async def initialize_data() -> bool:
await initialize_llm_catalog()
await initialize_user_agent_catalog() # 新增
return True
```
### Migration Strategy
#### 1. Alembic 迁移
```python
# backend/alembic/versions/20260302_add_user_agent_catalog.py
def upgrade() -> None:
# 创建表
op.create_table(
"user_agent_catalog",
sa.Column("agent_type", sa.String(20), nullable=False),
sa.Column("llm_id", sa.UUID(), nullable=False),
sa.Column("status", sa.String(20), nullable=False),
sa.Column("config", postgresql.JSONB(), nullable=False, server_default="{}"),
sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.text("now()")),
sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.text("now()")),
sa.PrimaryKeyConstraint("agent_type"),
sa.ForeignKeyConstraint(["llm_id"], ["llms.id"], ondelete="RESTRICT"),
)
op.execute(
"ALTER TABLE user_agent_catalog "
"ADD CONSTRAINT chk_status CHECK (status IN ('active', 'paused', 'migrating'))"
)
# 替换 trigger 函数
op.execute("""
CREATE OR REPLACE FUNCTION public.create_profile_for_new_user()
-- ... 新的 trigger 代码
""")
# 为已存在用户补充 user_agents
op.execute("""
INSERT INTO user_agents (id, user_id, llm_id, agent_type, config, status, created_by, updated_by)
SELECT
gen_random_uuid(),
p.id,
uac.llm_id,
uac.agent_type,
uac.config,
uac.status,
p.id,
p.id
FROM profiles p
CROSS JOIN user_agent_catalog uac
WHERE NOT EXISTS (
SELECT 1 FROM user_agents ua WHERE ua.user_id = p.id
);
""")
_enable_rls("user_agent_catalog")
def downgrade() -> None:
# 恢复旧 trigger
op.execute("""
CREATE OR REPLACE FUNCTION public.create_profile_for_new_user()
-- ... 旧的 trigger 代码(只有 profile
""")
_drop_rls("user_agent_catalog")
op.drop_table("user_agent_catalog")
```
### Configuration Update Flow
**用户修改配置的步骤:**
1. 编辑 `backend/src/core/config/static/database/user_agent_catalog.yaml`
2. 重启应用(或调用 `uv run python -m core.runtime.cli bootstrap`
3. `initialize_user_agent_catalog()` 自动执行
4. user_agent_catalog 表更新(upsert
5. 新用户注册时使用新配置
**示例:**
```yaml
# 修改 temperature
agents:
- agent_type: INTENT_RECOGNITION
llm_model_code: qwen3.5-flash
status: active
config:
temperature: 0.5 # 从 0.7 改为 0.5
```
重启应用后,新注册的用户 INTENT_RECOGNITION agent 会使用 temperature=0.5。
### Testing Strategy
1. **单元测试:** `load_user_agent_catalog()` 函数
2. **集成测试:** `initialize_user_agent_catalog()` upsert 逻辑
3. **E2E 测试:** 新用户注册后自动创建 3 个 user_agents 记录
4. **回归测试:** 已存在用户不受影响
### File Changes
```
backend/src/core/config/static/database/user_agent_catalog.yaml (填充)
backend/src/models/user_agent_catalog.py (新建)
backend/src/core/config/initial/init_data.py (扩展)
backend/alembic/versions/20260302_add_user_agent_catalog.py (新建)
backend/tests/unit/core/test_agent_init_data.py (扩展)
```
---
## TOKEN-001: Flutter 硬编码颜色迁移
### Problem
109 处硬编码 `Color(0xFF...)` 违反 `apps/AGENTS.md` 规则:"NEVER hardcode colors, sizes, or spacing values"。
分散在 11 个页面文件:
- register_screen.dart, register_verification_screen.dart
- settings_screen.dart, account_screen.dart
- contacts_screen.dart, calendar_event_detail_screen.dart
- add_contact_screen.dart, features_screen.dart
- memory_screen.dart, home_screen.dart
- todo_detail_screen.dart
### Solution
**渐进式迁移:**
1. 扫描所有硬编码颜色,统计频率
2. 将高频颜色添加到 `design_tokens.dart``AppColors`
3. 逐页面替换硬编码为 `AppColors.xxx`
4. 保留合理的动态颜色场景
### Migration Steps
#### Phase 1: 扫描和统计
```bash
# 扫描所有硬编码颜色
grep -r "Color(0x" apps/lib --include="*.dart" | \
sed 's/.*Color(0x\([0-9A-Fa-f]*\)).*/\1/' | \
sort | uniq -c | sort -rn
```
**预期输出:**
```
45 2196F3 # 蓝色(链接/主色)
23 D32F2F # 红色(错误)
18 4CAF50 # 绿色(成功)
...
```
#### Phase 2: 扩展 AppColors
```dart
// apps/lib/core/theme/design_tokens.dart
class AppColors {
// 现有颜色...
// 从硬编码迁移的颜色
static const Color linkBlue = Color(0xFF2196F3);
static const Color errorRed = Color(0xFFD32F2F);
static const Color successGreen = Color(0xFF4CAF50);
// ... 根据扫描结果添加
}
```
#### Phase 3: 逐页面迁移
```dart
// Before
Container(
color: Color(0xFF2196F3),
child: Text('Link'),
)
// After
Container(
color: AppColors.linkBlue,
child: Text('Link'),
)
```
**迁移顺序(按频率):**
1. register_screen.dart (最高频)
2. register_verification_screen.dart
3. settings_screen.dart
4. ... (其他页面)
#### Phase 4: 测试和验证
1. **视觉测试:** 逐页面检查 UI 是否正常
2. **Widget 测试:** 更新测试使用 AppColors
3. **设计审查:** 确认颜色一致性
### Allowed Exceptions
以下场景可以保留硬编码(需在 AGENTS.md 中明确):
- 动态计算的渐变色
- 图片处理相关的颜色
- 第三方库要求的颜色格式
### Testing Strategy
1. **Widget 测试:** 确保组件仍然正常渲染
2. **视觉回归测试:** 对比迁移前后的截图
3. **代码审查:** 确保没有遗漏的硬编码
### File Changes
```
apps/lib/core/theme/design_tokens.dart (扩展)
apps/lib/features/*/ui/screens/*.dart (迁移)
apps/AGENTS.md (明确允许的场景)
```
---
## Implementation Order
1. **TRIGGER-001** (优先级更高,影响功能)
- 创建 catalog YAML
- 创建 model 和迁移
- 扩展初始化逻辑
- 修改 trigger
- 测试
2. **TOKEN-001** (次要,不影响功能)
- 扫描硬编码
- 扩展 AppColors
- 逐页面迁移
- 测试
## Success Criteria
### TRIGGER-001
- [ ] 新用户注册后自动创建 3 个 user_agents 记录
- [ ] 已存在用户不受影响
- [ ] 配置可通过 YAML + 重启更新
- [ ] 所有测试通过
### TOKEN-001
- [ ] 硬编码颜色数量从 109 减少到 < 10
- [ ] UI 视觉无回归
- [ ] 所有测试通过
## Risks and Mitigations
### TRIGGER-001
- **风险:** llms 表中缺少对应的 model_code
- **缓解:** 初始化前检查 llms 表是否存在,提供清晰的错误信息
- **风险:** Trigger 性能影响
- **缓解:** catalog 表只有 3 行,查询性能可忽略
### TOKEN-001
- **风险:** 迁移后颜色不一致
- **缓解:** 视觉回归测试 + 设计审查
- **风险:** 遗漏某些硬编码
- **缓解:** 自动化扫描 + 代码审查
## Related Documents
- `docs/bugs/backlog.md` - Bug 列表
- `backend/AGENTS.md` - Backend 开发规则
- `apps/AGENTS.md` - Flutter 开发规则
- `backend/src/core/config/initial/init_data.py` - 现有初始化逻辑
- `backend/alembic/versions/20260227_0006_invite_codes_and_profile_referral.py` - Trigger 修改参考