fix: escape markdown preview HTML (#52)

src/main.py

@@ -1,5 +1,6 @@
 import asyncio
 import math
+from pathlib import Path
 
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
@@ -13,6 +14,7 @@ from src.views import router as frontend_router
 
 app = FastAPI(title="Stackchain Dashboard")
 CONTEXT_TIMEOUT_SECONDS = 5.0
+FRONTEND_DIR = Path(__file__).resolve().parent.parent / "frontend"
 
 app.add_middleware(
     CORSMiddleware,
@@ -22,6 +24,7 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
+app.mount("/static", StaticFiles(directory=FRONTEND_DIR), name="static")
 app.include_router(frontend_router)