Mainification: Bring Onboarding in from rh-test (#6564)

## Summary

Migrate the onboarding / login / sign-up / survey pieces from `rh-test`
to `main`.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6564-WIP-Bring-Onboarding-in-from-rh-test-2a16d73d365081318483f993e3ca0f89)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Jin Yi <jin12cc@gmail.com>
Co-authored-by: GitHub Action <action@github.com>

src/scripts/api.ts

@@ -326,14 +326,9 @@ export class ComfyApi extends EventTarget {
     super()
     this.user = ''
     this.api_host = location.host
-    const pathname = location.pathname
-    const isCloudSpaRoute = isCloud && pathname.startsWith('/cloud/')
-    if (isCloudSpaRoute) {
-      this.api_base = ''
-    } else {
-      this.api_base = pathname.split('/').slice(0, -1).join('/')
-    }
-    console.log('Running on', this.api_host)
+    this.api_base = isCloud
+      ? ''
+      : location.pathname.split('/').slice(0, -1).join('/')
     this.initialClientId = sessionStorage.getItem('clientId')
   }