feat: trading bot MVP — ICT Order Block + Liquidity Sweep strategy

Full-stack trading bot with:
- FastAPI backend with ICT strategy (Order Block + Liquidity Sweep detection)
- Backtester engine with rolling window, spread simulation, and performance metrics
- Hybrid market data service (yfinance + TwelveData with rate limiting + SQLite cache)
- Simulated exchange for paper trading
- React/TypeScript frontend with TradingView lightweight-charts v5
- Live dashboard with candlestick chart, OHLC legend, trade markers
- Backtest page with configurable parameters, equity curve, and trade table
- WebSocket support for real-time updates
- Bot runner with asyncio loop for automated trading

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

backend/app/api/routes/bot.py

@@ -0,0 +1,46 @@
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+from app.core.config import settings
+
+router = APIRouter(prefix="/bot", tags=["bot"])
+
+# Instance globale du bot (initialisée dans main.py)
+_bot_runner = None
+
+
+def set_bot_runner(runner) -> None:
+    global _bot_runner
+    _bot_runner = runner
+
+
+class BotStartRequest(BaseModel):
+    instrument: str = ""
+    granularity: str = ""
+
+
+@router.get("/status")
+async def bot_status():
+    if _bot_runner is None:
+        return {"running": False, "message": "Bot non initialisé"}
+    return _bot_runner.get_status()
+
+
+@router.post("/start")
+async def start_bot(req: BotStartRequest):
+    if _bot_runner is None:
+        raise HTTPException(503, "Bot non initialisé")
+    if req.instrument:
+        _bot_runner.instrument = req.instrument
+    if req.granularity:
+        _bot_runner.granularity = req.granularity
+    await _bot_runner.start()
+    return {"message": "Bot démarré", "status": _bot_runner.get_status()}
+
+
+@router.post("/stop")
+async def stop_bot():
+    if _bot_runner is None:
+        raise HTTPException(503, "Bot non initialisé")
+    await _bot_runner.stop()
+    return {"message": "Bot arrêté"}