fix tests

Author: jahooma

backend/src/__tests__/run-agent-step-tools.test.ts

@@ -410,7 +410,7 @@ describe('runAgentStep - set_output tool', () => {
         content: expect.stringContaining('Test instructions prompt'),
       },
       {
-        role: 'user',
+        role: 'assistant',
         content: expect.stringContaining('read_files'),
       },
       {

backend/src/__tests__/run-programmatic-step.test.ts

@@ -755,9 +755,9 @@ describe('runProgrammaticStep', () => {
       expect(result.agentState.messageHistory).toEqual([
         ...mockAgentState.messageHistory,
         {
-          role: 'user',
+          role: 'assistant',
           content:
-            '<user_message><codebuff_tool_call>\n{\n  "cb_tool_name": "end_turn",\n  "cb_easp": true\n}\n</codebuff_tool_call></user_message>',
+            '<codebuff_tool_call>\n{\n  "cb_tool_name": "end_turn",\n  "cb_easp": true\n}\n</codebuff_tool_call>',
         },
       ])
     })

backend/src/run-programmatic-step.ts

@@ -2,7 +2,6 @@ import { getToolCallString } from '@codebuff/common/tools/utils'
 
 import { executeToolCall } from './tools/tool-executor'
 import { logger } from './util/logger'
-import { asUserMessage } from './util/messages'
 import { SandboxManager } from './util/quickjs-sandbox'
 import { getRequestContext } from './websockets/request-context'
 import { sendAction } from './websockets/websocket-action'