Update app.py

app.py

@@ -1,13 +1,15 @@
 from fastapi import FastAPI, Request, Form
 from fastapi.responses import HTMLResponse
+from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
 import sys
 import io
+import json
 
 app = FastAPI()
+app.mount("/static", StaticFiles(directory="static"), name="static")
 templates = Jinja2Templates(directory="templates")
 
-# --- Core tracer logic ---
 def run_code_with_trace(code: str):
     trace_data = []
     stdout_capture = io.StringIO()
@@ -22,7 +24,7 @@ def run_code_with_trace(code: str):
 
     sys.settrace(tracer)
     try:
-        exec(code, {}, {})
+        exec(code, {})
     except Exception as e:
         trace_data.append({"error": str(e)})
     finally:
@@ -30,15 +32,12 @@ def run_code_with_trace(code: str):
 
     output = stdout_capture.getvalue()
     stdout_capture.close()
-
     return trace_data, output
 
-
 @app.get("/", response_class=HTMLResponse)
 async def index(request: Request):
     return templates.TemplateResponse("index.html", {"request": request})
 
-
 @app.post("/run", response_class=HTMLResponse)
 async def run_code(request: Request, code: str = Form(...)):
     trace, output = run_code_with_trace(code)
@@ -46,7 +45,7 @@ async def run_code(request: Request, code: str = Form(...)):
         "index.html",
         {
             "request": request,
-            "trace": trace,
+            "trace_json": json.dumps(trace),
             "output": output,
             "code": code
         }