Fix Gradio 5.49.1 compatibility issues

- Remove css parameter from gr.Blocks() (not supported in 5.49.1)
- Fix environment variable: DEV_MODE -> DISABLE_OAUTH (matches auth.py)
- Update .env, .env.example, and README with correct variable name

.env.example

@@ -16,4 +16,4 @@ LEADERBOARD_REPO=kshitijthakkar/smoltrace-leaderboard
 # METRICS_REPO=kshitijthakkar/agent-metrics-gpt4-20251116
 
 # Development Mode (skip authentication for local testing)
-DEV_MODE=true
+DISABLE_OAUTH=true

README.md

@@ -87,8 +87,8 @@ MCP_SERVER_URL=https://kshitijthakkar-tracemind-mcp-server.hf.space/gradio_api/m
 # Dataset Configuration
 LEADERBOARD_REPO=kshitijthakkar/smoltrace-leaderboard
 
-# Development Mode (optional)
-DEV_MODE=true
+# Development Mode (optional - disables OAuth for local testing)
+DISABLE_OAUTH=true
 ```
 
 ## Data Sources
@@ -177,8 +177,8 @@ insights = mcp_client.analyze_leaderboard(
 # Install dependencies
 pip install -r requirements.txt
 
-# Set development mode
-export DEV_MODE=true
+# Set development mode (optional - disables OAuth)
+export DISABLE_OAUTH=true
 
 # Run the app
 python app.py

app.py

@@ -15,7 +15,6 @@ load_dotenv()
 from utils.auth import is_authenticated, get_user_info, create_login_button, create_user_info_display, DEV_MODE
 from utils.navigation import Navigator, Screen
 from data_loader import create_data_loader_from_env
-from styles.tracemind_theme import get_tracemind_css
 from mcp_client.sync_wrapper import get_sync_mcp_client
 
 # Initialize
@@ -87,7 +86,7 @@ def estimate_evaluation_cost(model, agent_type, num_tests):
 def build_ui():
     """Build the Gradio UI"""
 
-    with gr.Blocks(css=get_tracemind_css(), title="TraceMind-AI") as demo:
+    with gr.Blocks(title="TraceMind-AI") as demo:
         # Header
         gr.Markdown("""
         # 🔍 TraceMind-AI