macOS application menu

Standard menus (App: hide/quit; Edit: clipboard roles enabling Cmd+C/V/X/Z;
View: Refresh Cmd+R + fullscreen; Window: minimize/zoom/cycle) plus File with
New/Close Tab (Cmd+T/W), New Folder/File, and a Connect submenu built from
saved connections (folders as nested submenus, Connection Manager entry).
Custom actions forward to the webview as menuAction messages; the menu rebuilds
whenever connections change. macOS-only per electrobun support.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/bun/rpc-handlers.ts

@@ -18,7 +18,10 @@ export interface AppDeps {
 	store: ConnectionStore;
 	settings: SettingsStore;
 	/** Assigned after the rpc object exists (it needs rpc.send). */
-	events: { sessionClosed: (info: { sessionId: string; reason: string }) => void };
+	events: {
+		sessionClosed: (info: { sessionId: string; reason: string }) => void;
+		connectionsChanged: () => void;
+	};
 }
 
 async function wrap<T extends object>(fn: () => Promise<T> | T): Promise<Result<T>> {
@@ -121,20 +124,30 @@ export function createAppRPC({ registry, engine, store, settings, events }: AppD
 				getConnections: () => wrap(async () => ({ store: await store.load() })),
 
 				upsertConnection: ({ connection }) =>
-					wrap(async () => ({ id: await store.upsertConnection(connection) })),
+					wrap(async () => {
+						const id = await store.upsertConnection(connection);
+						events.connectionsChanged();
+						return { id };
+					}),
 
 				deleteConnection: ({ id }) =>
 					wrap(async () => {
 						await store.deleteConnection(id);
+						events.connectionsChanged();
 						return {};
 					}),
 
 				upsertFolder: ({ folder }) =>
-					wrap(async () => ({ id: await store.upsertFolder(folder) })),
+					wrap(async () => {
+						const id = await store.upsertFolder(folder);
+						events.connectionsChanged();
+						return { id };
+					}),
 
 				deleteFolder: ({ id }) =>
 					wrap(async () => {
 						await store.deleteFolder(id);
+						events.connectionsChanged();
 						return {};
 					}),