Fix node loading hang when invoke URL ends with /app

[Copilot]

Summary

When navigating to the Workflow Editor with a URL like http://localhost:9090/app, the OpenAPI schema fetch was constructed using window.location.href, producing http://localhost:9090/app/openapi.json — a path that doesn't exist. The request hung silently, preventing node templates from ever loading.

Fix: Replace window.location.href.replace(/\/$/, '') with window.location.origin so the schema is always fetched from the server root regardless of the current URL path.

// Before — breaks when URL path is non-root (e.g. /app)
query: () => `${window.location.href.replace(/\/$/, '')}/openapi.json`,

// After — always resolves to http(s)://host:port/openapi.json
query: () => `${window.location.origin}/openapi.json`,

Related Issues / Discussions

QA Instructions

1. Start InvokeAI and navigate directly to http://localhost:9090/app
2. Open the Workflow Editor — nodes should load without hanging

Merge Plan

Checklist

• The PR has a short but descriptive title, suitable for a changelog
• Tests added / updated (if applicable)
• ❗Changes to a redux slice have a corresponding migration
• Documentation added / updated (if applicable)
• Updated What's New copy (if doing a release after this PR)

Original prompt

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This section details on the original issue you should resolve

<issue_title>[bug]: Node loading hangs when invoke URL ends with /app</issue_title>
<issue_description>### Is there an existing issue for this problem?

• I have searched the existing issues

Install method

Invoke's Launcher

Operating system

Linux

GPU vendor

Nvidia (CUDA)

GPU model

No response

GPU VRAM

No response

Version number

feature/multiuser branch

Browser

No response

System Information

No response

What happened

In multiuser mode, I logged in and went to the Workflow Editor tab. A message came up saying Loading nodes... and then hung. The workflow editor UI did not appear and I was unable to load, edit, or run workflows.

This only happens after login when the URL is http://localhost:9090/app. If I manually change the URL to http://localhost:9090/ the nodes load and the workflow editor works as expected.

What you expected to happen

I expect nodes to load correctly without my having to change the URL.

How to reproduce the problem

No response

Additional context

No response

Discord username

No response</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [bug]: Node loading hangs when invoke URL ends with /app #66

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[lstein]

works as advertised