refactor: query_weather bash→Rust builtin, 删除旧 skill

QWeather 天气查询从外部 bash 脚本重构为 Rust 原生 builtin 工具:
- ed25519-dalek 替代 openssl JWT 签名
- reqwest + tokio::join! 并发查询替代串行 curl
- serde_json 直接解析替代 python3 子进程
- city_id 内存缓存 (HashMap, 1h TTL)
- 支持 3/7/10/15/30d 逐日 + 24/72/168h 逐时预报
- 删除 resources/skills/query_weather/ (builtin 优先级更高)

resources/skills/query_weather/SKILL.md

@@ -1,30 +0,0 @@
-# query_weather
-
-查询天气信息（和风天气 API）。
-
-## Risk Level
-Low
-
-## Parameters
-```json
-{
-  "type": "object",
-  "properties": {
-    "location": {
-      "type": "string",
-      "description": "城市名，如 北京、上海、合肥"
-    },
-    "days": {
-      "type": "integer",
-      "description": "预报天数，默认3",
-      "default": 3
-    }
-  },
-  "required": ["location"]
-}
-```
-
-## Execute
-```bash
-scripts/weather.sh
-```

resources/skills/query_weather/scripts/weather.sh

@@ -1,56 +0,0 @@
-#!/bin/bash
-# 和风天气查询 → 输出 JSON
-read -r input
-LOCATION=$(echo "$input" | python3 -c "import sys,json; print(json.load(sys.stdin).get('location',''))" 2>/dev/null)
-DAYS=$(echo "$input" | python3 -c "import sys,json; print(json.load(sys.stdin).get('days',3))" 2>/dev/null)
-
-[ -z "$LOCATION" ] && echo '{"error":"请提供 location 参数"}' && exit 0
-
-API_HOST="${QWEATHER_API_HOST}"
-KEY_FILE="${QWEATHER_JWT_PRIVATE_KEY_FILE:-qweather/ed25519-private.pem}"
-KEY_ID="${QWEATHER_JWT_KEY_ID}"
-PROJECT_ID="${QWEATHER_JWT_PROJECT_ID}"
-TTL="${QWEATHER_JWT_TTL_SECONDS:-3600}"
-
-NOW=$(date +%s)
-HEADER=$(echo -n '{"alg":"EdDSA","kid":"'"$KEY_ID"'"}' | base64 -w0 | tr '+/' '-_' | tr -d '=')
-PAYLOAD=$(echo -n '{"sub":"'"$PROJECT_ID"'","iat":'$((NOW-30))',"exp":'$((NOW+TTL))'}' | base64 -w0 | tr '+/' '-_' | tr -d '=')
-INPUT="${HEADER}.${PAYLOAD}"
-TMP=$(mktemp) && echo -n "$INPUT" > "$TMP"
-SIG=$(openssl pkeyutl -sign -inkey "$KEY_FILE" -rawin -in "$TMP" 2>/dev/null | base64 -w0 | tr '+/' '-_' | tr -d '=')
-rm -f "$TMP"
-JWT="${INPUT}.${SIG}"
-[ -z "$JWT" ] && JWT="${QWEATHER_JWT}"
-[ -z "$JWT" ] && echo '{"error":"JWT 生成失败"}' && exit 0
-
-ENCODED=$(python3 -c "import urllib.parse; print(urllib.parse.quote('$LOCATION'))")
-CITY=$(curl -s --compressed "https://geoapi.qweather.com/v2/city/lookup?location=${ENCODED}" -H "Authorization: Bearer $JWT")
-CITY_ID=$(echo "$CITY" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d['location'][0]['id'] if d.get('location') else '')" 2>/dev/null)
-[ -z "$CITY_ID" ] && echo '{"error":"未找到城市: '"$LOCATION"'"}' && exit 0
-
-EP_DAYS=$([ "$DAYS" -le 3 ] && echo 3 || echo 7)
-NOW_RESP=$(curl -s --compressed "https://${API_HOST}/v7/weather/now?location=${CITY_ID}&lang=zh&unit=m" -H "Authorization: Bearer $JWT")
-DAILY_RESP=$(curl -s --compressed "https://${API_HOST}/v7/weather/${EP_DAYS}d?location=${CITY_ID}&lang=zh&unit=m" -H "Authorization: Bearer $JWT")
-
-export NOW_RESP DAILY_RESP LOCATION DAYS
-python3 -c "
-import os, json
-now = json.loads(os.environ['NOW_RESP'])
-daily = json.loads(os.environ['DAILY_RESP'])
-days = daily.get('daily', [])[:int(os.environ['DAYS'])]
-result = {
-    'location': os.environ['LOCATION'],
-    'now': {
-        'temp': now['now']['temp'],
-        'text': now['now']['text'],
-    },
-    'forecast': [
-        {'date': d['fxDate'], 'day': d['textDay'], 'night': d.get('textNight',''), 'tempMin': d['tempMin'], 'tempMax': d['tempMax']}
-        for d in days
-    ]
-}
-# 过滤空字段
-result['now'] = {k: v for k, v in result['now'].items() if v}
-result['forecast'] = [{k: v for k, v in f.items() if v} for f in result['forecast']]
-print(json.dumps(result, ensure_ascii=False))
-" 2>/dev/null || echo '{"error":"解析天气数据失败"}'