feat: add webapp

sfm/server.py

@@ -36,13 +36,14 @@ from __future__ import annotations
 
 import logging
 import sys
+from pathlib import Path
 from typing import Optional
 
 # FastAPI / Pydantic
 try:
     from fastapi import Body, FastAPI, HTTPException, Query
     from fastapi.middleware.cors import CORSMiddleware
-    from fastapi.responses import JSONResponse
+    from fastapi.responses import FileResponse, JSONResponse
     from pydantic import BaseModel
     import uvicorn
 except ImportError:
@@ -246,6 +247,12 @@ def health() -> dict:
     return {"status": "ok", "service": "sfm", "version": "0.1.0"}
 
 
+@app.get("/", response_class=FileResponse)
+def webapp():
+    """Serve the SFM web app."""
+    return str(Path(__file__).parent / "sfm_webapp.html")
+
+
 @app.get("/device/info")
 def device_info(
     port:     Optional[str] = Query(None,          description="Serial port (e.g. COM5, /dev/ttyUSB0)"),