feat(input): add Cmd+D keyboard shortcut for dictation on web

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/app/src/components/message-input.tsx

@@ -189,6 +189,23 @@ export function MessageInput({
     enableDuration: true,
   });
 
+  // Cmd+D to toggle dictation on web
+  useEffect(() => {
+    if (!IS_WEB) return;
+    function handleKeyDown(event: KeyboardEvent) {
+      if ((event.metaKey || event.ctrlKey) && event.key === "d") {
+        event.preventDefault();
+        if (isDictating) {
+          cancelDictation();
+        } else {
+          startDictation();
+        }
+      }
+    }
+    window.addEventListener("keydown", handleKeyDown);
+    return () => window.removeEventListener("keydown", handleKeyDown);
+  }, [isDictating, cancelDictation, startDictation]);
+
   // Animate overlay
   useEffect(() => {
     const showOverlay =