🔧 Fix root app.py with proper imports and answer extraction

Applied the same critical fixes to the root app.py that the Hugging Face Space
is actually using:
- Added proper Python path setup for module imports
- Removed redundant answer extraction that was corrupting processed results
- This should restore accuracy from 20% back to expected 90% level

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -5,6 +5,7 @@ High-performance GAIA solver with 90% accuracy integrated into a clean submissio
 """
 
 import os
+import sys
 import gradio as gr
 import requests
 import pandas as pd
@@ -14,6 +15,10 @@ import time
 from datetime import datetime
 from pathlib import Path
 
+# Add current directory to Python path to find main modules
+sys.path.insert(0, '/home/user/app')
+sys.path.insert(0, '/home/user')
+
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
@@ -92,21 +97,19 @@ class AdvancedGAIAAgent:
                     "question": question,
                     "file_name": ""
                 }
-                result = self.solver.solve_question(question_data)
-                answer = self._extract_answer(result)
+                # solve_question already returns a clean, processed answer string
+                answer = self.solver.solve_question(question_data)
             elif self.solver == "refactored":
                 # For refactored architecture
                 try:
                     from main_refactored import main as refactored_main
-                    result = refactored_main(question)
-                    answer = self._extract_answer(result)
+                    answer = refactored_main(question)
                 except Exception as e:
                     print(f"Refactored solver error: {e}")
                     answer = f"Refactored solver error: {e}"
             elif hasattr(self.solver, '__call__'):
                 # Generic callable solver
-                result = self.solver(question)
-                answer = self._extract_answer(result)
+                answer = self.solver(question)
             else:
                 # Last resort
                 answer = "Unable to process question with current solver"