Fix AI chat streaming persistence when command menu closes (#14854)

Closes [#1583](https://github.com/twentyhq/core-team-issues/issues/1583)


- Removed `messageId` column from `File` table and its references in
code (unrelated to this PR)
- Updated AI chat to use React Context API with persistent provider in
`CommandMenuContainer`
- Converted all AI chat component states to regular Recoil atoms (no
instance context needed)

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

packages/twenty-front/src/modules/ai/components/internal/SendMessageButton.tsx

@@ -1,25 +1,42 @@
+import { AI_CHAT_INPUT_ID } from '@/ai/constants/AiChatInputId';
+import { useAgentChatContextOrThrow } from '@/ai/hooks/useAgentChatContextOrThrow';
+import { type ObjectRecord } from '@/object-record/types/ObjectRecord';
+import { useHotkeysOnFocusedElement } from '@/ui/utilities/hotkey/hooks/useHotkeysOnFocusedElement';
 import { t } from '@lingui/core/macro';
+import { Key } from 'ts-key-enum';
 import { Button } from 'twenty-ui/input';
 
 export const SendMessageButton = ({
-  handleSendMessage,
-  input,
-  isLoading,
+  records,
 }: {
-  agentId: string;
-  handleSendMessage: () => void;
-  input: string;
-  isLoading: boolean;
+  records?: ObjectRecord[];
 }) => {
+  const { handleSendMessage, isLoading, input } = useAgentChatContextOrThrow();
+
+  useHotkeysOnFocusedElement({
+    keys: [Key.Enter],
+    callback: (event: KeyboardEvent) => {
+      if (!event.ctrlKey && !event.metaKey) {
+        event.preventDefault();
+        handleSendMessage(records);
+      }
+    },
+    focusId: AI_CHAT_INPUT_ID,
+    dependencies: [input, isLoading],
+    options: {
+      enableOnFormTags: true,
+    },
+  });
+
   return (
     <Button
+      hotkeys={input && !isLoading ? ['⏎'] : undefined}
+      onClick={() => handleSendMessage(records)}
+      disabled={!input || isLoading}
       variant="primary"
       accent="blue"
       size="small"
-      hotkeys={input && !isLoading ? ['⏎'] : undefined}
-      disabled={!input || isLoading}
       title={t`Send`}
-      onClick={handleSendMessage}
     />
   );
 };