Market Watch: multiplayer GARP paper trading simulator

- Game engine with multiplayer support (create games, join, leaderboard)
- GARP stock screener (S&P 500 + 400 MidCap, 900+ tickers)
- Automated trading logic for AI player (Case)
- Web portal at marketwatch.local:8889 with dark theme
- Systemd timer for Mon-Fri market hours
- Telegram alerts on trades and daily summary
- Stock analysis deep dive data (BAC, CFG, FITB, INCY)
- Expanded scan results (22 GARP candidates)
- Craigslist account setup + credentials

projects/market-watch/portfolio.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+"""Portfolio module — backward-compatible wrapper around game_engine.
+
+All operations now delegate to game_engine using the default game and 'case' player.
+"""
+
+import json
+import game_engine
+
+INITIAL_CASH = 100_000.0
+
+
+def _default():
+    """Get default game ID."""
+    return game_engine.get_default_game_id() or game_engine.ensure_default_game()
+
+
+def buy(ticker, shares, price, reason="GARP signal"):
+    return game_engine.buy(_default(), "case", ticker, shares, price, reason)
+
+
+def sell(ticker, shares=None, price=None, reason="GARP exit"):
+    return game_engine.sell(_default(), "case", ticker, shares, price, reason)
+
+
+def update_price(ticker, price):
+    game_engine.update_price(_default(), "case", ticker, price)
+
+
+def get_portfolio():
+    return game_engine.get_portfolio(_default(), "case")
+
+
+def get_history():
+    return game_engine.get_trades(_default(), "case")
+
+
+def daily_snapshot():
+    return game_engine.daily_snapshot(_default(), "case")
+
+
+def get_snapshots():
+    return game_engine.get_snapshots(_default(), "case")
+
+
+if __name__ == "__main__":
+    p = get_portfolio()
+    if p:
+        print(json.dumps(p, indent=2))
+    else:
+        print("No default game found. Run: python3 game_engine.py")