Feat: Make the agent dialog window exposed to the outside world fill in the begin form #3221 (#9124)

### What problem does this PR solve?
Feat: Make the agent dialog window exposed to the outside world fill in
the begin form #3221

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/services/agent-service.ts

@@ -24,6 +24,7 @@ const {
   fetchCanvas,
   fetchAgentAvatar,
   fetchAgentLogs,
+  fetchExternalAgentInputs,
 } = api;
 
 const methods = {
@@ -107,6 +108,10 @@ const methods = {
     url: fetchAgentLogs,
     method: 'get',
   },
+  fetchExternalAgentInputs: {
+    url: fetchExternalAgentInputs,
+    method: 'get',
+  },
 } as const;
 
 const agentService = registerNextServer<keyof typeof methods>(methods);