fix: restore composer overlay integration

tests/support/story-graph-switch-main.ts

@@ -66,8 +66,9 @@ app.whenReady().then(async () => {
     const point = await js<{ x: number; y: number }>(`(() => { const r = document.querySelector('.composer__options-trigger').getBoundingClientRect(); return { x: Math.round(r.x+r.width/2), y: Math.round(r.y+r.height/2) }; })()`)
     win.webContents.sendInputEvent({ type: 'mouseDown', ...point, button: 'left', clickCount: 1 })
     win.webContents.sendInputEvent({ type: 'mouseUp', ...point, button: 'left', clickCount: 1 })
-    // First focus stays on the first menu button, matching the model picker.
-    await wait('document.activeElement === document.querySelector(".composer__options button:not(:disabled)")')
+    // Focus the first enabled context control, which is the story-graph
+    // switch when no knowledge libraries are available.
+    await wait('document.activeElement === document.querySelector(".composer__options button:not(:disabled), .composer__options input:not(:disabled)")')
   }
   const scenarios: object[] = []
   try {