fix: add GET / route serving opax.html from static/

agents/core-logic/app.py

@@ -5,9 +5,10 @@ import os
 import sys
 import logging
 from contextlib import asynccontextmanager
+from pathlib import Path
 
 from fastapi import FastAPI, HTTPException, Request
-from fastapi.responses import JSONResponse
+from fastapi.responses import JSONResponse, FileResponse
 from pydantic import BaseModel
 
 logging.basicConfig(level=logging.INFO)
@@ -31,12 +32,16 @@ PROJECT_ID         = os.environ.get("GOOGLE_CLOUD_PROJECT", "propane-will-491900
 BQ_BILLING_DATASET = os.environ.get("BQ_BILLING_DATASET", "billing_data")
 CLOUD_BUILD_TRIGGER_ID = os.environ.get("CLOUD_BUILD_TRIGGER_ID", "")
 
+# Static folder: /app/static/ (two levels up from agents/core-logic)
+STATIC_DIR = Path(__file__).parent.parent.parent / "static"
+
 _budget_store: dict = {}
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     logger.info(f"OSVauco agent '{APP_NAME}' starting up")
+    logger.info(f"Static dir: {STATIC_DIR} (exists={STATIC_DIR.exists()})")
     yield
     logger.info(f"OSVauco agent '{APP_NAME}' shutting down")
 
@@ -80,6 +85,25 @@ async def _ensure_session(user_id: str, session_id: str):
     return session
 
 
+# ── root — serve opax.html ────────────────────────────────────────────────────
+@app.get("/")
+async def root():
+    index = STATIC_DIR / "opax.html"
+    if not index.exists():
+        logger.error(f"opax.html not found at {index}")
+        raise HTTPException(status_code=404, detail=f"opax.html not found at {index}")
+    return FileResponse(str(index), media_type="text/html")
+
+
+# ── static files ──────────────────────────────────────────────────────────────
+@app.get("/static/{filename}")
+async def static_file(filename: str):
+    filepath = STATIC_DIR / filename
+    if not filepath.exists():
+        raise HTTPException(status_code=404, detail=f"{filename} not found")
+    return FileResponse(str(filepath))
+
+
 # ── helse ────────────────────────────────────────────────────────────────────
 @app.get("/health")
 async def health():
@@ -225,7 +249,6 @@ async def tokens_estimate(complexity: str = "medium"):
             return JSONResponse({"complexity": complexity, "factor": factor, "estimated_usd": None, "warning": "Ingen data ennå (OQ-15)"})
         row = result[0]
         avg_cost = float(row.avg_cost_per_call or 0)
-        # Estimat: 1 oppdrag = 20 kall snitt × faktor
         CALLS_PER_TASK = 20
         estimated = round(avg_cost * CALLS_PER_TASK * factor, 4)
         return JSONResponse({