refactor: consolidate blockchain explorer into single app and update backup ignore patterns

- Remove standalone explorer-web app (README, HTML, package files)
- Add /web endpoint to blockchain-explorer for web interface access
- Update .gitignore to exclude application backup archives (*.tar.gz, *.zip)
- Add backup documentation files to .gitignore (BACKUP_INDEX.md, README.md)
- Consolidate explorer functionality into main blockchain-explorer application

apps/wallet/src/app/__main__.py

@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+"""
+Wallet Daemon Entry Point
+
+This module provides the entry point for running the AITBC wallet daemon
+with multi-chain support.
+"""
+
+import uvicorn
+import logging
+from pathlib import Path
+
+from app.main import app
+from app.settings import settings
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
+)
+
+logger = logging.getLogger(__name__)
+
+def main():
+    """Main entry point for the wallet daemon"""
+    logger.info("Starting AITBC Wallet Daemon with Multi-Chain Support")
+    logger.info(f"Debug mode: {settings.debug}")
+    logger.info(f"Coordinator URL: {settings.coordinator_base_url}")
+    logger.info(f"Ledger DB Path: {settings.ledger_db_path}")
+    
+    # Create data directory if it doesn't exist
+    data_dir = settings.ledger_db_path.parent
+    data_dir.mkdir(parents=True, exist_ok=True)
+    
+    # Initialize chain manager
+    try:
+        from app.chain.manager import chain_manager
+        logger.info("Initializing chain manager...")
+        
+        # Load chains from configuration
+        chain_manager.load_chains()
+        
+        # Log chain information
+        chains = chain_manager.list_chains()
+        logger.info(f"Loaded {len(chains)} chains:")
+        for chain in chains:
+            logger.info(f"  - {chain.chain_id}: {chain.name} ({chain.status.value})")
+        
+        logger.info(f"Default chain: {chain_manager.default_chain_id}")
+        
+    except Exception as e:
+        logger.error(f"Failed to initialize chain manager: {e}")
+        logger.info("Continuing without multi-chain support...")
+    
+    # Start the server
+    logger.info(f"Starting server on {settings.host}:{settings.port}")
+    
+    uvicorn.run(
+        app,
+        host=settings.host,
+        port=settings.port,
+        reload=settings.debug,
+        log_level="info" if not settings.debug else "debug"
+    )
+
+if __name__ == "__main__":
+    main()