Refactor site configuration and color scheme management

- Replaced static config with dynamic site info context.
- Updated color scheme handling in various components to use site info.
- Removed deprecated config file and integrated site info fetching.
- Enhanced user preference page to allow color scheme selection.
- Adjusted blog and console components to reflect new site info structure.
- Improved error handling and fallback mechanisms for site info retrieval.

internal/repo/init.go

@@ -129,6 +129,7 @@ func migrate() error {
 		&model.Label{},
 		&model.Like{},
 		&model.File{},
+		&model.KV{},
 		&model.OidcConfig{},
 		&model.Post{},
 		&model.Session{},