feat: 早报系统重构与功能增强

- 新增常驻调度器 daily/scheduler.py + run-scheduler.ps1（定时生成/推送）
- 新增 daily/bridge_manager.py：Windows 兼容的 Cursor SDK 桥接
- 新增 skills/daily-featured-pick 首推 Skill 与叙事轴/去重逻辑
- 新闻抓取窗口、GitHub 搜索、企微 delta 模式等多项改进
- 补充设计文档与 superpowers 计划/规范
- 新增对应测试（scheduler、featured_pick、github_search、news_fetch_window 等）

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

daily/board_select.py

@@ -24,20 +24,22 @@ def board_select(
         from daily.skills_group import group_skills_by_source
 
         pool = group_skills_by_source(items, limit=pool_size, pool_size=pool_size)
-
-        def key_fn(x: dict[str, Any]) -> str:
-            return skill_id(x)
     else:
         pool = items[: max(pool_size, limit)]
 
-        def key_fn(x: dict[str, Any]) -> str:
-            return str(x.get("repo") or "")
-
     out: list[dict[str, Any]] = []
     for item in pool:
-        k = key_fn(item)
-        if not k or k in recent_keys:
-            continue
+        if kind == "skill":
+            key = skill_id(item)
+            source = str(item.get("source") or "").strip()
+            if (key and key in recent_keys) or (source and source in recent_keys):
+                continue
+            if not key and not source:
+                continue
+        else:
+            key = str(item.get("repo") or "")
+            if not key or key in recent_keys:
+                continue
         out.append(item)
         if len(out) >= limit:
             break