feat: 实现 board_select 周去重与深池补满

Co-authored-by: Cursor <cursoragent@cursor.com>

daily/board_select.py

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+"""五榜唯一列表主人：周去重 + 深池补满。"""
+
+from __future__ import annotations
+
+import logging
+from typing import Any, Literal
+
+from daily.delta import skill_id
+
+logger = logging.getLogger(__name__)
+
+
+def board_select(
+    *,
+    board: str,
+    items: list[dict[str, Any]],
+    recent_keys: set[str],
+    limit: int,
+    pool_size: int,
+    kind: Literal["skill", "github"],
+) -> list[dict[str, Any]]:
+    """从深池过滤近 N 日已展示 key，按原顺序取满 limit；不足则短榜。"""
+    if kind == "skill":
+        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
+        out.append(item)
+        if len(out) >= limit:
+            break
+    if len(out) < limit:
+        logger.info("board_short:%s:%s", board, len(out))
+    return out