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/utils/api.ts

@@ -1,4 +1,5 @@
 let api_host = `/v1`;
+const ExternalApi = `/api`;
 
 export { api_host };
 
@@ -155,6 +156,8 @@ export default {
   uploadAgentFile: (id?: string) => `${api_host}/canvas/upload/${id}`,
   fetchAgentLogs: (canvasId: string) =>
     `${api_host}/canvas/${canvasId}/sessions`,
+  fetchExternalAgentInputs: (canvasId: string) =>
+    `${ExternalApi}${api_host}/agentbots/${canvasId}/inputs`,
 
   // mcp server
   listMcpServer: `${api_host}/mcp_server/list`,