refactor: 统一价格入口 mo_data.get_price() - 22个脚本移除自拉腾讯API

所有价格获取统一走 mo_data.get_price() / get_prices_batch():
  - 优先读 live_prices(DB) → 无/过期才调 stock_quote(API) → 自动写回DB
  - 22个脚本全部替换：branch_scanner chip_factors divergence_detector
    market_screener mo_provider mofin_collect monitor_300308 300308_monitor
    multi_timeframe refresh_macro_context stale_detector stale_push_wlin
    stock_profile strategy_evaluator strategy_lifecycle strategy_review
    strategy-staleness-check technical_analysis xiaoguo_signal_consumer
    collect_evaluation_data

scripts/mo_data.py

@@ -13,10 +13,12 @@ JSON 文件已弃用，仅保留为历史备份。
   wl = read_watchlist()   # 返回和 watchlist.json 一样的 dict 结构
 """
 
-import sqlite3, json
+import sqlite3, json, sys
 from datetime import datetime
+from pathlib import Path
 
 DB_PATH = '/home/hmo/MoFin/data/mofin.db'
+SCRIPT_DIR = Path('/home/hmo/MoFin/scripts')
 
 
 def _get_db():
@@ -147,6 +149,126 @@ def read_watchlist_json():
     return read_watchlist()
 
 
+# ── 统一价格获取（唯一入口，禁止各脚本自拉API）──
+
+def get_price(code, max_age_minutes=5, use_stale_fallback=True):
+    """获取单只股票最新价格。
+    
+    优先级: live_prices(DB) → stock_quote(API兜底)
+    - live_prices 有且不超过 max_age_minutes → 直接返回
+    - 没有或过期 → 调 stock_quote 拉，写回 live_prices
+    - 都失败 → 返回 (None, None)
+    
+    返回 (price, change_pct)，两值都是 float 或 None。
+    """
+    from mofin_db import get_price_from_db
+    from datetime import datetime, timedelta
+    
+    # 1. 先读 DB
+    try:
+        db_price, db_chg = get_price_from_db(code)
+        if db_price is not None and db_price > 0:
+            # 检查时效性
+            conn = __import__('sqlite3').connect(str(DB_PATH))
+            row = conn.execute(
+                "SELECT updated_at FROM live_prices WHERE code=?",
+                (str(code).strip(),)
+            ).fetchone()
+            conn.close()
+            if row and row[0]:
+                try:
+                    updated = datetime.strptime(row[0], "%Y-%m-%d %H:%M:%S")
+                    age = (datetime.now() - updated).total_seconds() / 60
+                    if age <= max_age_minutes:
+                        return (db_price, db_chg)
+                except:
+                    pass
+            else:
+                return (db_price, db_chg)
+    except Exception:
+        pass
+    
+    # 2. DB 没有或过期 → 调 stock_quote
+    if not use_stale_fallback:
+        return (None, None)
+    
+    try:
+        import subprocess, json
+        r = subprocess.run(
+            [sys.executable, str(SCRIPT_DIR / "stock_quote.py"), str(code)],
+            capture_output=True, text=True, timeout=15
+        )
+        if r.returncode == 0:
+            data = json.loads(r.stdout.strip())
+            price = float(data.get("price", 0))
+            chg = float(data.get("change_pct", 0))
+            if price > 0:
+                # 写回 live_prices
+                try:
+                    conn = __import__('sqlite3').connect(str(DB_PATH))
+                    conn.execute("""
+                        INSERT OR REPLACE INTO live_prices (code, price, change_pct, updated_at)
+                        VALUES (?, ?, ?, datetime('now','localtime'))
+                    """, (str(code).strip(), price, chg))
+                    conn.commit()
+                    conn.close()
+                except:
+                    pass
+                return (price, chg)
+    except Exception:
+        pass
+    
+    return (None, None)
+
+
+def get_prices_batch(codes, max_age_minutes=5):
+    """批量获取价格，返回 {code: (price, change_pct)}"""
+    from mofin_db import get_prices_batch_from_db
+    
+    result = {}
+    need_api = []
+    
+    # 1. 批量读 DB
+    try:
+        db_prices = get_prices_batch_from_db(codes)
+        for code in codes:
+            cs = str(code).strip()
+            if cs in db_prices:
+                p, c = db_prices[cs]
+                if p and p > 0:
+                    result[cs] = (p, c)
+                    continue
+            need_api.append(cs)
+    except:
+        need_api = [str(c).strip() for c in codes]
+    
+    # 2. 缺失的调 API
+    if need_api:
+        try:
+            import subprocess, json
+            r = subprocess.run(
+                [sys.executable, str(SCRIPT_DIR / "stock_quote.py")] + need_api,
+                capture_output=True, text=True, timeout=30
+            )
+            if r.returncode == 0:
+                for line in r.stdout.strip().split("\n"):
+                    if not line:
+                        continue
+                    try:
+                        data = json.loads(line)
+                        code = str(data.get("code", "")).strip()
+                        price = float(data.get("price", 0))
+                        chg = float(data.get("change_pct", 0))
+                        if code and price > 0:
+                            result[code] = (price, chg)
+                    except:
+                        pass
+        except:
+            pass
+    
+    return result
+
+
 # ── cash_log 写入 ──────────────────────────────────────────────────
 
 def write_cash_log(cash_before, cash_after, frozen_before, frozen_after,