fix(backup): support different config filenames in backup listing

Root cause: Backup listing pattern was hardcoded to 'mcp.json.{hostname}.*',
but different hosts use different config filenames (Gemini uses settings.json,
Codex uses config.toml). When backups were created with format
'{original_filename}.{hostname}.{timestamp}', they couldn't be found by
list_backups() method, leading to 'No backups found' error despite backups
being created successfully.

Solution: Updated backup listing pattern from hardcoded 'mcp.json.{hostname}.*'
to flexible '*.{hostname}.*' pattern that matches any config filename. Also
updated test expectations to reflect original filename preservation.

Fixes #2 of 2: Backup listing not finding settings.json backups

# Conflicts:
#	tests/test_mcp_host_config_backup.py

Author: LittleCoinCoin

hatch/mcp_host_config/backup.py

@@ -355,10 +355,12 @@ def list_backups(self, hostname: str) -> List[BackupInfo]:
 
         backups = []
 
-        # Search for both correct format and legacy incorrect format for backward compatibility
+        # Search for backups with flexible filename matching
+        # Different hosts use different config filenames (mcp.json, settings.json, config.toml)
+        # Backup format: {original_filename}.{hostname}.{timestamp}
         patterns = [
-            f"mcp.json.{hostname}.*",  # Correct format: mcp.json.gemini.*
-            f"mcp.json.MCPHostType.{hostname.upper()}.*"  # Legacy incorrect format: mcp.json.MCPHostType.GEMINI.*
+            f"*.{hostname}.*",  # Flexible: settings.json.gemini.*, mcp.json.claude-desktop.*, etc.
+            f"mcp.json.MCPHostType.{hostname.upper()}.*"  # Legacy incorrect format for backward compatibility
         ]
 
         for pattern in patterns: