feat(tui): add /history command — M1-007 (#297)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/cli/src/tui/app.tsx

@@ -13,7 +13,8 @@ import { useViewport } from './hooks/use-viewport.js';
 import { useAppMode } from './hooks/use-app-mode.js';
 import { useConversations } from './hooks/use-conversations.js';
 import { useSearch } from './hooks/use-search.js';
-import { executeHelp, executeStatus, commandRegistry } from './commands/index.js';
+import { executeHelp, executeStatus, executeHistory, commandRegistry } from './commands/index.js';
+import { fetchConversationMessages } from './gateway-api.js';
 
 export interface TuiAppProps {
   gatewayUrl: string;
@@ -133,6 +134,23 @@ export function TuiApp({
           );
           break;
         }
+        case 'history':
+        case 'hist': {
+          void executeHistory({
+            conversationId: socket.conversationId,
+            gatewayUrl,
+            sessionCookie,
+            fetchMessages: fetchConversationMessages,
+          })
+            .then((result) => {
+              socket.addSystemMessage(result);
+            })
+            .catch((err: unknown) => {
+              const msg = err instanceof Error ? err.message : String(err);
+              socket.addSystemMessage(`Failed to fetch history: ${msg}`);
+            });
+          break;
+        }
         default:
           socket.addSystemMessage(`Local command not implemented: /${parsed.command}`);
       }