feat: auto-update pouch and catalog sources during normal use

Add taste-skill to catalog.yaml, and refresh pouch plus cloned catalog
or custom Git sources on a 24h interval so users do not need a
separate update command.

pouch/config.py

@@ -0,0 +1,87 @@
+"""用户级 pouch 配置（~/.config/pouch/config.yaml）。"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+from typing import Any
+
+from pouch import yaml_io
+from pouch.paths import CONFIG_FILE
+
+DEFAULT_AUTO_UPDATE_INTERVAL = "24h"
+_INTERVAL_UNITS = {
+    "s": 1,
+    "m": 60,
+    "h": 3600,
+    "d": 86400,
+}
+
+
+@dataclass(frozen=True)
+class AutoUpdateSettings:
+    enabled: bool = True
+    interval_seconds: int = 24 * 3600
+
+
+def load_user_config(path: Path | None = None) -> dict[str, Any]:
+    path = path or CONFIG_FILE
+    if not path.is_file():
+        return {}
+    data = yaml_io.safe_load(path.read_text(encoding="utf-8")) or {}
+    if not isinstance(data, dict):
+        raise SystemExit(f"pouch 配置格式错误: {path}")
+    return data
+
+
+def save_user_config(data: dict[str, Any], path: Path | None = None) -> None:
+    path = path or CONFIG_FILE
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(
+        yaml_io.safe_dump(data, allow_unicode=True, sort_keys=False),
+        encoding="utf-8",
+    )
+
+
+def parse_interval(value: Any) -> int:
+    if value is None or value is True:
+        return AutoUpdateSettings().interval_seconds
+    if isinstance(value, bool):
+        raise ValueError(f"无效的自动更新间隔: {value!r}")
+    if isinstance(value, int):
+        if value < 0:
+            raise ValueError(f"无效的自动更新间隔: {value!r}")
+        return value
+    text = str(value).strip().lower()
+    if not text:
+        return AutoUpdateSettings().interval_seconds
+    if text.isdigit():
+        return int(text)
+    unit = text[-1]
+    amount = text[:-1]
+    if unit in _INTERVAL_UNITS and amount.isdigit():
+        return int(amount) * _INTERVAL_UNITS[unit]
+    raise ValueError(f"无效的自动更新间隔: {value!r}（例如 24h、1d、60m、3600）")
+
+
+def load_auto_update_settings(
+    config: dict[str, Any] | None = None,
+    path: Path | None = None,
+) -> AutoUpdateSettings:
+    if config is None:
+        config = load_user_config(path)
+    raw = config.get("auto_update", True)
+    if raw is False:
+        return AutoUpdateSettings(enabled=False)
+    if raw is True or raw is None:
+        return AutoUpdateSettings()
+    if not isinstance(raw, dict):
+        return AutoUpdateSettings()
+    enabled = raw.get("enabled", True)
+    if enabled is False:
+        return AutoUpdateSettings(enabled=False)
+    try:
+        interval = parse_interval(raw.get("interval", DEFAULT_AUTO_UPDATE_INTERVAL))
+    except ValueError as exc:
+        raise SystemExit(str(exc)) from exc
+    return AutoUpdateSettings(enabled=bool(enabled), interval_seconds=interval)