配置全面迁移数据库：PromptConfig、TaskConfig动态调度、敏感词/清洗规则/趋势映射/平台标签/痛点模板全部可编辑

- 新增 PromptConfig 模型 + API，支持提示词在线编辑（16条默认）
- 调度器动态读取 TaskConfig.schedule，admin 可调执行时间
- 新增 KeywordDomainMap、SensitiveWord、ContentCleanRule、TrendFieldMapping 表
- DOMAINS、TREND_DOMAIN_MAP、PLATFORM_TAGS、china_pains、RSS关键词、priority_weights 全部迁移到 DB
- tasks.html 重构：卡片网格+配置/产出/历史/提示词四个Tab，折叠显示
- 清理冗余代码：DEFAULT_PROMPTS死代码、collector.py unreachable代码、compliance_checker bug
- strip_thinking_html 改用 DB 规则优先

platform/backend/app/schemas.py

@@ -458,13 +458,18 @@ class CaseResponse(CaseBase):
 
 
 class TaskLogBase(BaseModel):
+    module_id: str
     task_name: str
     topic_id: Optional[str] = None
     status: str
     message: Optional[str] = None
+    error_trace: Optional[str] = None
+    triggered_by: str = "scheduler"
+    result_data: Dict[str, Any] = {}
     started_at: Optional[datetime] = None
     finished_at: Optional[datetime] = None
     duration: Optional[int] = None
+    next_run_time: Optional[datetime] = None
 
 
 class TaskLogResponse(TaskLogBase):
@@ -473,6 +478,29 @@ class TaskLogResponse(TaskLogBase):
     model_config = ConfigDict(from_attributes=True)
 
 
+class TaskConfigBase(BaseModel):
+    module_id: str
+    enabled: bool = True
+    params: Dict[str, Any] = {}
+    schedule: Optional[str] = None
+
+
+class TaskConfigUpdate(BaseModel):
+    enabled: Optional[bool] = None
+    params: Optional[Dict[str, Any]] = None
+    schedule: Optional[str] = None
+    last_modified_by: Optional[str] = None
+
+
+class TaskConfigResponse(TaskConfigBase):
+    id: int
+    last_modified_by: Optional[str] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
 class LLMConfigBase(BaseModel):
     name: str
     system_prompt: Optional[str] = None