Azure Portal not showing chat url for conversational agents after easy auth is enabled

### Severity

P4 - Low (Cosmetic/minor inconvenience)

### Describe the Bug with repro steps

Expected Behaviour:
- A chat url is populated on the essentials tab for the conversational agent
- Easy auth shows as configured on the essentials tab for the conversational agent

Actual Behaviour:
- Chat url is empty
- Easy auth is saying that it is not configured

Steps to reproduce:
1. Create a new conversational agent using the attached workflow.json
2. Go to the authentication tab in your logic app and add microsoft as an identity provider. Use recommended settings for everything and click add.
3. Navigate to the workflow and click "Chat (preview)". The actual behaviour is displayed.

### What type of Logic App Is this happening in?

Standard (Portal)

### Are you experiencing a regression?

Based on the images in the labs, it looks like this was working at an earlier date. https://azure.github.io/logicapps-labs/docs/logicapps-ai-course/build_conversational_agents/deploy-agents-clients

### Which operating system are you using?

Windows

### Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

### Workflow JSON

```json
{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"contentVersion": "1.0.0.0",
"actions": {
"Agent": {
"type": "Agent",
"inputs": {
"parameters": {
"deploymentId": "gpt-4.1-mini",
"messages": [
{
"role": "system",
"content": "Show me the details of the demo GitHub issue."
}
],
"agentModelType": "AzureOpenAI",
"agentModelSettings": {
"agentHistoryReductionSettings": {
"agentHistoryReductionType": "maximumTokenCountReduction",
"maximumTokenCount": 128000
},
"deploymentModelProperties": {
"name": "gpt-4.1-mini",
"format": "OpenAI",
"version": "2025-04-14"
}
}
},
"modelConfigurations": {
"model1": {
"referenceName": "agent"
}
}
},
"tools": {
"Get_GitHub_repositories": {
"actions": {
"Lists_all_repositories_for_the_authenticated_user": {
"type": "ApiConnection",
"inputs": {
"host": {
"connection": {
"referenceName": "github"
}
},
"method": "get",
"path": "/user/repos"
}
}
},
"description": "Gets my public and private GitHub respositories.\n"
}
},
"runAfter": {
"When_a_new_chat_session_starts": [
"Succeeded"
]
}
}
},
"outputs": {},
"triggers": {
"When_a_new_chat_session_starts": {
"type": "Request",
"kind": "Agent"
}
}
},
"kind": "Agent"
}
```

### Screenshots or Videos

**Easy auth settings**

### Environment

Chrome Version 144.0.7559.134 (Official Build) (64-bit)

### Additional context

I can see that easy auth is working because I'm forced to login with my Microsoft account when visiting the chat url in private mode on Microsoft Edge. When I click this link, it takes me to the chat url iframe.