Simplify tray: static template icon, click focuses the app

The setImage-swapped progress frames lost the template treatment on macOS and
rendered black-on-dark once transfers started. Dial back per user decision:
the tray is now just the glyph (template image set once at construction, never
swapped) and clicking it activates the window — no menu, no progress effects.
Removes everything that only served the fancy version: progress frames +
generation, engine.aggregateProgress, the workspacesSync webview->bun channel
(schema, send proxy, panels effect, handlers) and the activate-tab action.

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

src/bun/index.ts

@@ -38,7 +38,6 @@ const edits = new EditManager(registry, engine, settings);
 const events = {
 	sessionClosed: (_info: { sessionId: string; reason: string }) => {},
 	connectionsChanged: () => {},
-	workspacesSync: (_sync: import("../shared/rpc").WorkspaceSyncInfo) => {},
 };
 const rpc = createAppRPC({ registry, engine, store, settings, edits, events });
 const url = await getMainViewUrl();
@@ -65,16 +64,11 @@ const win = new BrowserWindow({
 	rpc,
 });
 
-const tray = new AppTray(win, engine);
-tray.onAction = (action) => rpc.send.menuAction({ action });
+new AppTray(win);
 
-engine.onUpdate = (snapshot) => {
-	rpc.send.transferUpdate(snapshot);
-	tray.updateProgress();
-};
+engine.onUpdate = (snapshot) => rpc.send.transferUpdate(snapshot);
 events.sessionClosed = (info) => rpc.send.sessionClosed(info);
 events.connectionsChanged = () => void applyApplicationMenu(store);
-events.workspacesSync = (sync) => tray.updateTabs(sync);
 void settings.load().then((s) => engine.setConcurrency(effectiveConcurrency(s)));
 
 void applyApplicationMenu(store);