feat(app): Enter key confirms and sends dictation

When dictating and focused on an agent, pressing Enter now confirms
the dictation and sends the message, matching the behavior of clicking
the submit button.

packages/app/src/components/agent-input-area.tsx

@@ -74,6 +74,8 @@ interface AgentInputAreaProps {
   autoFocus?: boolean;
   /** Callback to expose the addImages function to parent components */
   onAddImages?: (addImages: (images: ImageAttachment[]) => void) => void;
+  /** Callback to expose a focus function to parent components (desktop only). */
+  onFocusInput?: (focus: () => void) => void;
   /** Optional draft context for listing commands before an agent exists. */
   commandDraftConfig?: DraftCommandConfig;
   /** Called when a message is about to be sent (any path: keyboard, dictation, queued). */
@@ -103,6 +105,7 @@ export function AgentInputArea({
   clearDraft,
   autoFocus = false,
   onAddImages,
+  onFocusInput,
   commandDraftConfig,
   onMessageSent,
   onComposerHeightChange,
@@ -208,6 +211,15 @@ export function AgentInputArea({
     onAddImages?.(addImages);
   }, [addImages, onAddImages]);
 
+  const focusInput = useCallback(() => {
+    if (Platform.OS !== "web") return;
+    messageInputRef.current?.focus();
+  }, []);
+
+  useEffect(() => {
+    onFocusInput?.(focusInput);
+  }, [focusInput, onFocusInput]);
+
   const submitMessage = useCallback(
     async (text: string, images?: ImageAttachment[]) => {
       onMessageSent?.();
@@ -402,6 +414,10 @@ export function AgentInputArea({
       }
 
       switch (action.id) {
+        case "message-input.send":
+          return messageInputRef.current?.runKeyboardAction("send") ?? false;
+        case "message-input.dictation-confirm":
+          return messageInputRef.current?.runKeyboardAction("dictation-confirm") ?? false;
         case "message-input.focus":
           if (Platform.OS !== "web") {
             messageInputRef.current?.focus();
@@ -440,8 +456,10 @@ export function AgentInputArea({
     handlerId: keyboardHandlerIdRef.current,
     actions: [
       "message-input.focus",
+      "message-input.send",
       "message-input.dictation-toggle",
       "message-input.dictation-cancel",
+      "message-input.dictation-confirm",
       "message-input.voice-toggle",
       "message-input.voice-mute-toggle",
     ],

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

@@ -100,7 +100,7 @@ export interface MessageInputProps {
 export interface MessageInputRef {
   focus: () => void;
   blur: () => void;
-  runKeyboardAction: (action: MessageInputKeyboardActionKind) => void;
+  runKeyboardAction: (action: MessageInputKeyboardActionKind) => boolean;
   /**
    * Web-only: return the underlying DOM element for focus assertions/retries.
    * May return null if not mounted or on native.
@@ -242,26 +242,35 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
     runKeyboardAction: (action) => {
       if (action === "focus") {
         textInputRef.current?.focus();
-        return;
+        return true;
+      }
+
+      if (action === "send" || action === "dictation-confirm") {
+        if (isDictatingRef.current) {
+          sendAfterTranscriptRef.current = true;
+          confirmDictation();
+          return true;
+        }
+        return false;
       }
 
       if (action === "voice-toggle") {
         handleToggleRealtimeVoiceShortcut();
-        return;
+        return true;
       }
 
       if (action === "voice-mute-toggle") {
         if (isRealtimeVoiceForCurrentAgent) {
           voice?.toggleMute();
         }
-        return;
+        return true;
       }
 
       if (action === "dictation-cancel") {
         if (isDictatingRef.current) {
           cancelDictation();
         }
-        return;
+        return true;
       }
 
       if (action === "dictation-toggle") {
@@ -271,7 +280,10 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(funct
         } else {
           void startDictationIfAvailable();
         }
+        return true;
       }
+
+      return false;
     },
     getNativeElement: () => {
       if (!IS_WEB) return null;

packages/app/src/hooks/use-keyboard-shortcuts.ts

@@ -129,6 +129,11 @@ export function useKeyboardShortcuts({
             id: "message-input.focus",
             scope: "message-input",
           });
+        case "send":
+          return keyboardActionDispatcher.dispatch({
+            id: "message-input.send",
+            scope: "message-input",
+          });
         case "dictation-toggle":
           return keyboardActionDispatcher.dispatch({
             id: "message-input.dictation-toggle",
@@ -139,6 +144,11 @@ export function useKeyboardShortcuts({
             id: "message-input.dictation-cancel",
             scope: "message-input",
           });
+        case "dictation-confirm":
+          return keyboardActionDispatcher.dispatch({
+            id: "message-input.dictation-confirm",
+            scope: "message-input",
+          });
         case "voice-toggle":
           return keyboardActionDispatcher.dispatch({
             id: "message-input.voice-toggle",

packages/app/src/keyboard/actions.ts

@@ -11,6 +11,7 @@ export type MessageInputKeyboardActionKind =
   | "queue"
   | "dictation-toggle"
   | "dictation-cancel"
+  | "dictation-confirm"
   | "voice-toggle"
   | "voice-mute-toggle";
 

packages/app/src/keyboard/keyboard-action-dispatcher.ts

@@ -2,8 +2,10 @@ export type KeyboardActionScope = "global" | "message-input" | "sidebar" | "work
 
 export type KeyboardActionId =
   | "message-input.focus"
+  | "message-input.send"
   | "message-input.dictation-toggle"
   | "message-input.dictation-cancel"
+  | "message-input.dictation-confirm"
   | "message-input.voice-toggle"
   | "message-input.voice-mute-toggle"
   | "workspace.tab.new"
@@ -27,8 +29,10 @@ export type KeyboardActionId =
 
 export type KeyboardActionDefinition =
   | { id: "message-input.focus"; scope: KeyboardActionScope }
+  | { id: "message-input.send"; scope: KeyboardActionScope }
   | { id: "message-input.dictation-toggle"; scope: KeyboardActionScope }
   | { id: "message-input.dictation-cancel"; scope: KeyboardActionScope }
+  | { id: "message-input.dictation-confirm"; scope: KeyboardActionScope }
   | { id: "message-input.voice-toggle"; scope: KeyboardActionScope }
   | { id: "message-input.voice-mute-toggle"; scope: KeyboardActionScope }
   | { id: "workspace.tab.new"; scope: KeyboardActionScope }

packages/app/src/keyboard/keyboard-shortcuts.ts

@@ -860,6 +860,14 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     },
   },
 
+  {
+    id: "message-input-dictation-confirm-enter",
+    action: "message-input.action",
+    combo: "Enter",
+    when: { commandCenter: false, terminal: false },
+    payload: { type: "message-input", kind: "dictation-confirm" },
+  },
+
   {
     id: "message-input-voice-mute-toggle",
     action: "message-input.action",