Replace the SHOW_CHAT_INITIALIZED command with SHOW_AUTO_CLOSING_MODAL and ensure messages end with a period

Author: robertpiosik

packages/vscode/src/views/panel/backend/message-handlers/handle-send-prompt.ts

@@ -243,11 +243,11 @@ export const handle_send_prompt = async (params: {
   }
 
   params.panel_provider.send_message({
-    command: 'SHOW_CHAT_INITIALIZED',
+    command: 'SHOW_AUTO_CLOSING_MODAL',
     title:
       resolved_preset_names.length > 1
-        ? 'Chats have been initialized in the connected browser'
-        : 'Chat has been initialized in the connected browser'
+        ? 'Chats have been initialized in the connected browser.'
+        : 'Chat has been initialized in the connected browser.'
   })
 }