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

scripts/topic_selector.py

@@ -22,7 +22,7 @@ TODAY = __import__('datetime').datetime.now().strftime("%Y-%m-%d")
 
 logger = logging.getLogger(__name__)
 
-TREND_DOMAIN_MAP = {
+DEFAULT_TREND_DOMAIN_MAP = {
     "远程工作": "未来工作方式",
     "AI工具": "AI与效率",
     "可持续生活": "可持续生活系统",
@@ -37,11 +37,38 @@ TREND_DOMAIN_MAP = {
     "家庭教育": "科技人文交叉",
 }
 
+_cached_trend_domain_map = None
+
+def _load_trend_domain_map():
+    global _cached_trend_domain_map
+    if _cached_trend_domain_map is not None:
+        return _cached_trend_domain_map
+    try:
+        from app.core.prompt_loader import _get_session
+        from app.models import TrendFieldMapping
+        session = _get_session()
+        try:
+            rows = session.query(TrendFieldMapping).filter(TrendFieldMapping.is_active == True).order_by(TrendFieldMapping.sort_order).all()
+            if rows:
+                _cached_trend_domain_map = {r.trend_keyword: r.field_name for r in rows}
+                logger.info(f"从DB加载 {len(_cached_trend_domain_map)} 条 trend_domain_map")
+                return _cached_trend_domain_map
+        finally:
+            session.close()
+    except Exception as e:
+        logger.warning(f"从DB加载 trend_domain_map 失败: {e}")
+    _cached_trend_domain_map = DEFAULT_TREND_DOMAIN_MAP
+    return _cached_trend_domain_map
+
+def get_trend_domain_map():
+    return _load_trend_domain_map()
+
 def _topic_trend_score(topic: Dict, trend: Dict) -> float:
     field = (topic.get("field") or "").lower()
     title = (topic.get("title") or "").lower()
     core = (topic.get("core_concept") or "").lower()
-    trend_domain = TREND_DOMAIN_MAP.get(trend.get("domain", ""), "")
+    trend_domain_map = get_trend_domain_map()
+    trend_domain = trend_domain_map.get(trend.get("domain", ""), "")
     keywords = [trend.get("topic", "")] + trend.get("hot_keywords", [])
     score = 0.0
     if trend_domain and trend_domain in field: