fix: keep virtual keyboard open when tapping special keys

- Use onPointerDown with preventDefault() instead of onClick
- Add onKeepFocus callback to SpecialKeysStrip and SpecialKeysPanel
- Expose focusInput via onTerminalReady in TerminalComponent
- MobileTerminalWrapper passes focus callback to keep keyboard open

apps/web/src/components/special-keys-strip.tsx

@@ -5,6 +5,7 @@ interface SpecialKeysStripProps {
   onSend: (data: string) => void;
   isVisible: boolean;
   onMoreClick?: () => void;
+  onKeepFocus?: () => void;
 }
 
 const PRIMARY_KEYS: { key: SpecialKey; label: string }[] = [
@@ -22,16 +23,29 @@ export const SpecialKeysStrip: React.FC<SpecialKeysStripProps> = ({
   onSend,
   isVisible,
   onMoreClick,
+  onKeepFocus,
 }) => {
   const { sendKey } = useSpecialKeys({ onSend });
 
+  const handlePointerDown = (e: React.PointerEvent, key: SpecialKey) => {
+    e.preventDefault();
+    sendKey(key);
+    onKeepFocus?.();
+  };
+
+  const handleMorePointerDown = (e: React.PointerEvent) => {
+    e.preventDefault();
+    onMoreClick?.();
+    onKeepFocus?.();
+  };
+
   return (
     <div className={`special-keys-strip ${isVisible ? "visible" : "hidden"}`}>
       {PRIMARY_KEYS.map(({ key, label }) => (
         <button
           key={key}
           className="special-key-button"
-          onClick={() => sendKey(key)}
+          onPointerDown={(e) => handlePointerDown(e, key)}
           type="button"
           aria-label={`Send ${label}`}
         >
@@ -41,7 +55,7 @@ export const SpecialKeysStrip: React.FC<SpecialKeysStripProps> = ({
       {onMoreClick && (
         <button
           className="special-key-button special-key-more"
-          onClick={onMoreClick}
+          onPointerDown={handleMorePointerDown}
           type="button"
           aria-label="More special keys"
         >