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/__main__.py

@@ -5,6 +5,7 @@ from __future__ import annotations
 import sys
 
 from daily.generate import main as generate_main
+from daily.scheduler import main as schedule_main
 from daily.webhook import main as push_main
 
 
@@ -14,7 +15,14 @@ def main() -> int:
         return generate_main()
     if cmd in {"push", "send", "webhook"}:
         return push_main(sys.argv[2:])
-    print(f"未知命令: {cmd}\n用法: python -m daily [generate|push] [report_path]", file=sys.stderr)
+    if cmd in {"schedule", "scheduler", "daemon"}:
+        return schedule_main()
+    print(
+        f"未知命令: {cmd}\n"
+        "用法: python -m daily [generate|push|schedule] [report_path]\n"
+        "      python -m daily schedule [--once] [--dry-run]",
+        file=sys.stderr,
+    )
     return 1