feat: AI agent, signal engine, surge detector, portfolio simulator

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

engine/surge.py

@@ -0,0 +1,20 @@
+import logging
+
+logger = logging.getLogger(__name__)
+
+class SurgeDetector:
+    def __init__(self, multiplier: float = 3.0):
+        self.multiplier = multiplier
+
+    def detect(self, tickers: list[dict], avg_volumes: dict[str, float]) -> list[str]:
+        surged = []
+        for t in tickers:
+            symbol = t["symbol"]
+            if not symbol.endswith("USDT"):
+                continue
+            current_vol = float(t.get("quoteVolume", 0))
+            avg_vol = avg_volumes.get(symbol, 0)
+            if avg_vol > 0 and current_vol >= avg_vol * self.multiplier:
+                logger.info(f"Surge detected: {symbol} volume {current_vol:.0f} vs avg {avg_vol:.0f}")
+                surged.append(symbol)
+        return surged