Revert "fix(dashboard): lazy-init useMobileKeyboard so remount has no stale render"

This reverts commit eb111f526e.

packages/dashboard/app/hooks/useMobileKeyboard.ts

@@ -110,23 +110,10 @@ interface UseMobileKeyboardOptions {
 export function useMobileKeyboard(
   { enabled = true }: UseMobileKeyboardOptions = {},
 ): { keyboardOverlap: number; viewportHeight: number | null; viewportOffsetTop: number; keyboardOpen: boolean } {
-  // Lazy initial values: read the actual visualViewport on first render
-  // so a remount (e.g. switching tabs back with the keyboard up) doesn't
-  // start with keyboardOpen=false. That stale-state render briefly hid
-  // the .chat-thread compensation and unhid the executor status bar,
-  // which then reappeared as a blank pane covering half the composer
-  // before settling.
-  const initialMetrics = (): KeyboardMetrics => {
-    if (!enabled || typeof window === "undefined" || !isMobileDevice()) {
-      return { overlap: 0, open: false, vvHeight: null, vvOffsetTop: 0 };
-    }
-    return getKeyboardMetrics();
-  };
-  const [initial] = useState(initialMetrics);
-  const [keyboardOverlap, setKeyboardOverlap] = useState(initial.overlap);
-  const [viewportHeight, setViewportHeight] = useState<number | null>(initial.vvHeight);
-  const [viewportOffsetTop, setViewportOffsetTop] = useState(initial.vvOffsetTop);
-  const [keyboardOpen, setKeyboardOpen] = useState(initial.open);
+  const [keyboardOverlap, setKeyboardOverlap] = useState(0);
+  const [viewportHeight, setViewportHeight] = useState<number | null>(null);
+  const [viewportOffsetTop, setViewportOffsetTop] = useState(0);
+  const [keyboardOpen, setKeyboardOpen] = useState(false);
 
   useEffect(() => {
     if (!enabled || !isMobileDevice()) {