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/skills_board.py

@@ -2,14 +2,16 @@
 
 from __future__ import annotations
 
+import json
 import logging
 import re
+import time
 from typing import Any, Literal
 
 import certifi
 import httpx
 
-from daily.config import env
+from daily.config import CACHE_DIR, env
 
 logger = logging.getLogger(__name__)
 
@@ -17,6 +19,81 @@ Board = Literal["trending", "hot"]
 SKILLS_SITE = "https://www.skills.sh"
 USER_AGENT = "Mozilla/5.0 (compatible; skills-hot-daily/1.0; +https://skills.sh)"
 
+FEED_URLS = [
+    "https://cdn.jsdelivr.net/gh/NeverSight/skills.sh_feed@main/data/feed.json",
+    "https://raw.githubusercontent.com/NeverSight/skills.sh_feed/main/data/feed.json",
+]
+FEED_CACHE_TTL = 600
+FEED_CACHE_FILE = CACHE_DIR / "feed.json"
+
+_feed_cache: dict[str, Any] = {"data": None, "fetched_at": 0.0}
+
+
+def format_installs(n: int | float) -> str:
+    if n >= 1_000_000:
+        return f"{n / 1_000_000:.1f}M"
+    if n >= 1_000:
+        return f"{n / 1_000:.1f}K"
+    return str(int(n))
+
+
+def _fetch_feed_json(url: str) -> dict[str, Any]:
+    headers = {"User-Agent": USER_AGENT, "Accept": "application/json"}
+    with httpx.Client(
+        timeout=httpx.Timeout(20.0, connect=10.0),
+        verify=certifi.where(),
+        follow_redirects=True,
+    ) as client:
+        resp = client.get(url, headers=headers)
+        resp.raise_for_status()
+        return resp.json()
+
+
+def _load_feed_disk_cache() -> dict[str, Any] | None:
+    if not FEED_CACHE_FILE.exists():
+        return None
+    try:
+        return json.loads(FEED_CACHE_FILE.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError) as exc:
+        logger.warning("读取 feed 本地缓存失败: %s", exc)
+        return None
+
+
+def _save_feed_disk_cache(data: dict[str, Any]) -> None:
+    FEED_CACHE_FILE.parent.mkdir(parents=True, exist_ok=True)
+    FEED_CACHE_FILE.write_text(json.dumps(data, ensure_ascii=False), encoding="utf-8")
+
+
+def load_feed(force: bool = False) -> dict[str, Any]:
+    now = time.time()
+    if not force and _feed_cache["data"] and now - _feed_cache["fetched_at"] < FEED_CACHE_TTL:
+        return _feed_cache["data"]
+
+    errors: list[str] = []
+    for url in FEED_URLS:
+        for attempt in range(3):
+            try:
+                data = _fetch_feed_json(url)
+                _feed_cache["data"] = data
+                _feed_cache["fetched_at"] = now
+                _save_feed_disk_cache(data)
+                logger.info("skills feed 已更新: %s", url)
+                return data
+            except Exception as exc:
+                msg = f"{url} (#{attempt + 1}): {exc}"
+                errors.append(msg)
+                logger.debug("拉取失败 %s", msg)
+                time.sleep(0.5 * (attempt + 1))
+
+    stale = _load_feed_disk_cache()
+    if stale:
+        logger.warning("网络不可用，回退到 feed 本地缓存")
+        _feed_cache["data"] = stale
+        _feed_cache["fetched_at"] = now
+        return stale
+
+    raise RuntimeError(f"无法获取 skills 数据。最近错误: {errors[-1] if errors else 'unknown'}")
+
 _SKILL_RE = re.compile(
     r'\{"source":"(?P<source>[^"]+)","skillId":"(?P<skill_id>[^"]+)",'
     r'"name":"(?P<name>[^"]+)","installs":(?P<installs>\d+)'