fix(composer): keep first focus on the expert menu when opening options

48d7526 widened the options dialog first-focus selector to inputs, so the new story graph switch above the menus took initial focus. Keyboard users no longer landed on the expert / work mode menus like the model picker. Restore the button-only target; the switch stays reachable with Tab.

src/renderer/src/Composer.tsx

@@ -333,7 +333,9 @@ export const Composer = memo(function Composer({
       }
     };
     const frame = requestAnimationFrame(() => {
-      composerOptionsRef.current?.querySelector<HTMLElement>("input:not(:disabled), button:not(:disabled)")?.focus();
+      // Keyboard users land on the same first control as the model picker
+      // (expert / work mode menus); optional switches above stay Tab-reachable.
+      composerOptionsRef.current?.querySelector<HTMLButtonElement>("button:not(:disabled)")?.focus();
     });
     document.addEventListener("pointerdown", dismissOutside);
     document.addEventListener("focusin", dismissOutside);

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

@@ -66,7 +66,8 @@ 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 })
-    await wait(`document.activeElement === document.querySelector('${toggle}')`)
+    // First focus stays on the first menu button, matching the model picker.
+    await wait('document.activeElement === document.querySelector(".composer__options button:not(:disabled)")')
   }
   const scenarios: object[] = []
   try {