restore and rebuild all stock query scripts

Recover 7 existing scripts from remote repo and rebuild 5 missing ones:
- twse-margin-trading.py (融資融券)
- twse-day-trading.py (當沖交易)
- twse-foreign-holdings.py (外資持股)
- yahoo-dividend-browserless.py (股利資訊)
- yahoo-broker-trading-browserless.py (主力券商進出)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/yahoo-ma-signal.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from __future__ import annotations
+
+import json
+import sys
+import urllib.parse
+import urllib.request
+
+
+def fetch_closes(symbol: str, range_: str = "6mo", interval: str = "1d") -> list[float]:
+    base = f"https://query1.finance.yahoo.com/v8/finance/chart/{symbol}"
+    params = {"range": range_, "interval": interval}
+    url = f"{base}?{urllib.parse.urlencode(params)}"
+
+    req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
+    with urllib.request.urlopen(req, timeout=30) as resp:
+        data = json.loads(resp.read().decode("utf-8", errors="replace"))
+
+    result = data.get("chart", {}).get("result", [])
+    if not result:
+        return []
+
+    quote = result[0].get("indicators", {}).get("quote", [])
+    if not quote:
+        return []
+
+    closes = quote[0].get("close", [])
+    return [float(x) for x in closes if x is not None]
+
+
+def sma(values: list[float], window: int) -> float:
+    return sum(values[-window:]) / window
+
+
+def main() -> None:
+    symbol = sys.argv[1] if len(sys.argv) > 1 else "00922.TW"
+    closes = fetch_closes(symbol)
+
+    if len(closes) < 60:
+        print(f"{symbol} 資料不足：至少需要 60 筆日收盤，當前 {len(closes)}")
+        return
+
+    price = closes[-1]
+    ma5 = sma(closes, 5)
+    ma10 = sma(closes, 10)
+    ma20 = sma(closes, 20)
+    ma60 = sma(closes, 60)
+
+    bias20 = ((price - ma20) / ma20) * 100
+
+    print(f"{symbol} 均線摘要")
+    print(f"- 收盤：{price:.2f}")
+    print(f"- MA5 ：{ma5:.2f}")
+    print(f"- MA10：{ma10:.2f}")
+    print(f"- MA20：{ma20:.2f}")
+    print(f"- MA60：{ma60:.2f}")
+    print(f"- 20日乖離：{bias20:.2f}%")
+
+    # 簡單判讀
+    trend = []
+    if price > ma20:
+        trend.append("站上月線")
+    else:
+        trend.append("跌破月線")
+
+    if ma20 > ma60:
+        trend.append("中期偏多")
+    else:
+        trend.append("中期偏弱")
+
+    if ma5 > ma20:
+        trend.append("短線強於月線")
+    else:
+        trend.append("短線弱於月線")
+
+    print(f"- 判讀：{'／'.join(trend)}")
+
+
+if __name__ == "__main__":
+    main()