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-macd-signal.py

@@ -0,0 +1,91 @@
+#!/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 ema(values: list[float], period: int) -> list[float]:
+    if not values:
+        return []
+    k = 2 / (period + 1)
+    out = [values[0]]
+    for v in values[1:]:
+        out.append(v * k + out[-1] * (1 - k))
+    return out
+
+
+def macd(closes: list[float]) -> tuple[list[float], list[float], list[float]]:
+    ema12 = ema(closes, 12)
+    ema26 = ema(closes, 26)
+    dif = [a - b for a, b in zip(ema12, ema26)]
+    dea = ema(dif, 9)
+    hist = [d - s for d, s in zip(dif, dea)]
+    return dif, dea, hist
+
+
+def main() -> None:
+    symbol = sys.argv[1] if len(sys.argv) > 1 else "00922.TW"
+    closes = fetch_closes(symbol)
+
+    if len(closes) < 35:
+        print(f"{symbol} 資料不足，無法判斷 MACD（至少 35 筆，當前 {len(closes)}）")
+        return
+
+    dif, dea, hist = macd(closes)
+
+    d0, d1 = dif[-1], dif[-2]
+    s0, s1 = dea[-1], dea[-2]
+    h0, h1 = hist[-1], hist[-2]
+
+    golden_cross = d1 <= s1 and d0 > s0
+    death_cross = d1 >= s1 and d0 < s0
+    low_zone = d0 < 0 and s0 < 0
+
+    if golden_cross and low_zone:
+        signal = "✅ 低位金叉：偏多訊號"
+    elif golden_cross:
+        signal = "✅ 金叉：短線轉強"
+    elif death_cross:
+        signal = "⚠️ 死叉：短線轉弱"
+    elif h0 > h1 and h0 > 0:
+        signal = "📈 多頭延續（柱體擴大）"
+    elif h0 < h1 and h0 < 0:
+        signal = "📉 空頭延續（柱體擴大）"
+    else:
+        signal = "👀 MACD 震盪中，先觀察"
+
+    print(f"{symbol} MACD 摘要")
+    print(f"- DIF：{d0:.4f}")
+    print(f"- DEA：{s0:.4f}")
+    print(f"- HIST：{h0:.4f}")
+    print(f"- 訊號：{signal}")
+
+
+if __name__ == "__main__":
+    main()