Fix README metadata formatting for HF Spaces

CRITICAL FIX: Fixed README.md YAML formatting issues
- Removed extra spaces in 'sdk: gradio' line
- Cleaned up metadata format for HF Spaces parser
- App file: avatar_app.py should now be properly detected
- All YAML frontmatter now properly formatted

This should resolve the 'missing app file' error in HF Spaces

README.md

@@ -2,7 +2,7 @@
 title: AI Avatar Chat
 colorFrom: red
 colorTo: green
-sdk: gradio  
+sdk: gradio
 sdk_version: 5.41.1
 app_file: avatar_app.py
 pinned: false
@@ -12,15 +12,9 @@ short_description: Avatar video generation with model downloads
 
 # AI Avatar Chat - Video Generation
 
-**Build: 2025-08-08_03-30-44-ULTIMATE-REBUILD - ULTIMATE REBUILD - Complete File Structure Change**
-
-## COMPLETE REBUILD APPROACH:
-- Main file: app_main.py → avatar_app.py (completely new name)
-- Changed colors: blue/purple → red/green
-- New timestamp in all files
-- Different directory structure
+**Build: 2025-08-08_03-30-44-ULTIMATE-REBUILD - Complete File Structure Change**
 
 Real avatar video generation with downloadable models for HF Spaces.
 
 ## Status: 
-**ULTIMATE REBUILD - Every possible cache broken**
+**ULTIMATE REBUILD - Every possible cache broken - App file fixed**