fix(agent-loop): preserve unified send contracts

packages/core/agent-loop/tests/cancel.spec.ts

@@ -71,7 +71,7 @@ describe('Agent.cancel()', () => {
     })
 
     send(agent, 'drop me')
-    agent.cancel()
+    agent.cancel({ kind: 'user' })
     await new Promise(resolve => setTimeout(resolve, 30))
     agent.cancel({ kind: 'parent' })
 
@@ -403,7 +403,7 @@ describe('Agent.cancel()', () => {
 
     send(agent, 'go')
     await new Promise(r => setTimeout(r, 30))
-    agent.cancel()
+    agent.cancel({ kind: 'user' })
     await waitForIdle(ctx, agent)
 
     expect(reasons).toEqual([{ kind: 'aborted' }])

packages/core/agent-loop/tests/loop.spec.ts

@@ -3,7 +3,7 @@ import { Context } from 'cordis'
 import LlmService, { CallId, StreamChunk } from '@deepseek-ai/dsh-llm'
 import SessionStore, { SessionId, TurnEndReason } from '@deepseek-ai/dsh-session'
 import SystemPrompt from '@deepseek-ai/dsh-system-prompt'
-import ToolRegistry, { defineTool } from '@deepseek-ai/dsh-tools'
+import ToolRegistry, { defineContentToolFixture, defineTool } from '@deepseek-ai/dsh-tools'
 import AgentRegistry, { type Agent } from '@deepseek-ai/dsh-agent'
 
 import AgentLoop from '@deepseek-ai/dsh-agent-loop'