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/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",