fix(terminal): repaint parked frame after layout

src/renderer/src/components/terminal-pane/terminal-parked-viewport-frame.test.ts

@@ -78,14 +78,14 @@ describe('parked terminal viewport frames', () => {
     expect(local.serialize).not.toHaveBeenCalled()
   })
 
-  it('replays a matching-grid frame and rebuilds WebGL after parsing', async () => {
+  it('replays a matching-grid frame and repaints after reveal layout settles', async () => {
     const matching = makePane(1, 'matching')
     const stale = makePane(2, 'stale')
-    const rebuildPaneWebgl = vi.fn()
+    const scheduleRevealRepaint = vi.fn()
     const manager = {
       getPanes: () => [matching.pane, stale.pane],
-      hasWebglRenderer: () => true,
-      rebuildPaneWebgl
+      hasWebglRenderer: () => false,
+      scheduleRevealRepaint
     } as unknown as PaneManager
     const replayingPanesRef = { current: new Map<number, number>() }
 
@@ -113,7 +113,7 @@ describe('parked terminal viewport frames', () => {
     )
     expect(mocks.replayIntoTerminalAsync.mock.calls[0]?.[3].shouldReleaseRenderPause()).toBe(true)
     await Promise.resolve()
-    expect(rebuildPaneWebgl).toHaveBeenCalledWith(1)
+    expect(scheduleRevealRepaint).toHaveBeenCalledOnce()
     expect(consumeParkedTerminalViewportFrameMarker(matching.pane)).toBe(true)
     expect(consumeParkedTerminalViewportFrameMarker(matching.pane)).toBe(false)
   })

src/renderer/src/components/terminal-pane/terminal-parked-viewport-frame.ts

@@ -84,11 +84,10 @@ export function replayParkedTerminalViewportFrames(args: {
     void replay.then(() => {
       if (
         pane.container.dataset[PARKED_VIEWPORT_FRAME_DATASET_KEY] === 'true' &&
-        args.isVisible() &&
-        args.manager.hasWebglRenderer(pane.id)
+        args.isVisible()
       ) {
-        // Why: WebGL attached to the empty remount can retain a blank render model until reactivated after parsing.
-        args.manager.rebuildPaneWebgl(pane.id)
+        // Why: the immediate refresh can precede measurable layout; repaint the parsed frame after reveal settles.
+        args.manager.scheduleRevealRepaint()
       }
     })
     replayed += 1