fix(shortcuts): prevent accidental double-Shift palette activation (#1519)

src/ui/lib/app-keyboard-shortcuts.ts

@@ -25,3 +25,35 @@ export function dispatchCtrlW(target: EventTarget | null) {
   });
   return !target.dispatchEvent(event);
 }
+
+/** Match two consecutive Shift presses, never a typing or IME sequence. */
+export function createCommandPaletteShortcutMatcher() {
+  let lastShift: number | null = null;
+  const reset = () => {
+    lastShift = null;
+  };
+  const matches = (event: KeyboardEvent, now = Date.now()): boolean => {
+    if (
+      event.defaultPrevented ||
+      event.isComposing ||
+      event.keyCode === 229 ||
+      event.repeat ||
+      event.altKey
+    ) {
+      reset();
+      return false;
+    }
+    if (isShiftKey(event) && !event.ctrlKey && !event.metaKey) {
+      const matched = lastShift !== null && now - lastShift < 300;
+      lastShift = matched ? null : now;
+      return matched;
+    }
+    reset();
+    return (
+      (event.ctrlKey || event.metaKey) &&
+      !event.shiftKey &&
+      event.code === "KeyK"
+    );
+  };
+  return { matches, reset };
+}