Integrate document-format storage into the editor (#4265)

* Integrate document-format storage into the editor

* Address review feedback: drop redundant clones and dedupe metadata traversal

* Extract DocumentHistory and move storage-metadata tests to their own file

* Extract storage diffing/IO, gate validation and .gdd save behind preferences, restructure tests

* Address PR review: save-format/path consistency, autosave persistence, and view-settings/diff fixes

* Skip storage remount on .gdd open and split value/timestamp drift in attribute diff

* Rename storage tests module and surface .gdd open failures with per-resource diff detail

* Add debug-menu toggle to hide the storage preferences section

* Hopefully fix async tests

* Shorten comments

* Fix tests

* Review

* Review

* Review

* Block on future mesages in tests

* Review

* Shorten comments

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Co-authored-by: Timon <me@timon.zip>

desktop/wrapper/src/intercept_frontend_message.rs

@@ -37,13 +37,14 @@ pub(super) fn intercept_frontend_message(dispatcher: &mut DesktopWrapperMessageD
 			if let Some(path) = path {
 				dispatcher.respond(DesktopFrontendMessage::WriteFile { path, content });
 			} else {
+				let extension = std::path::Path::new(&name).extension().and_then(|extension| extension.to_str()).unwrap_or("*").to_string();
 				dispatcher.respond(DesktopFrontendMessage::SaveFileDialog {
 					title: "Save Document".to_string(),
 					default_filename: name,
 					default_folder: folder,
 					filters: vec![FileFilter {
-						name: "Graphite".to_string(),
-						extensions: vec!["graphite".to_string()],
+						name: "Graphite Document".to_string(),
+						extensions: vec![extension],
 					}],
 					context: SaveFileDialogContext::Document { document_id, content },
 				});