Initial eth_hedge_sim: P0 market, auth UI, one-click deploy.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/api/market.py

@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from typing import Annotated
+
+from fastapi import APIRouter, Depends, HTTPException
+
+from ..market import get_gateway
+from .auth import require_user
+
+router = APIRouter(prefix="/api/market", tags=["market"])
+
+
+@router.get("/snapshot")
+async def market_snapshot(_user: Annotated[str, Depends(require_user)]) -> dict:
+    gw = get_gateway()
+    snap = gw.snapshot_dict()
+    if snap.get("pair") is None:
+        raise HTTPException(status_code=503, detail="market not aligned yet")
+    return snap
+
+
+@router.post("/realign")
+async def market_realign(_user: Annotated[str, Depends(require_user)]) -> dict:
+    """手动重对齐次日到期 ATM 合约（运维/调试用）。"""
+    gw = get_gateway()
+    try:
+        pair = await gw.realign_async()
+    except Exception as e:
+        raise HTTPException(status_code=502, detail=str(e)) from e
+    return {"ok": True, "pair": pair.to_dict() if pair else None, "snapshot": gw.snapshot_dict()}