chore: support redirect query params on signup (supabase#37272)

Author: ignaciodob

apps/studio/components/interfaces/SignIn/SignUpForm.tsx

@@ -4,10 +4,12 @@ import { parseAsString, useQueryStates } from 'nuqs'
 import { useRef, useState } from 'react'
 import { toast } from 'sonner'
 import * as yup from 'yup'
+import { useRouter } from 'next/router'
 
 import { useSignUpMutation } from 'data/misc/signup-mutation'
 import { BASE_PATH } from 'lib/constants'
 import { passwordSchema } from 'lib/schemas'
+import { buildPathWithParams } from 'lib/gotrue'
 import {
   AlertDescription_Shadcn_,
   AlertTitle_Shadcn_,
@@ -28,6 +30,7 @@ const SignUpForm = () => {
   const [isSubmitted, setIsSubmitted] = useState(false)
   const [passwordHidden, setPasswordHidden] = useState(true)
   const [captchaToken, setCaptchaToken] = useState<string | null>(null)
+  const router = useRouter()
 
   const [searchParams] = useQueryStates({
     auth_id: parseAsString.withDefault(''),
@@ -59,9 +62,19 @@ const SignUpForm = () => {
         ? location.origin
         : process.env.NEXT_PUBLIC_SITE_URL
     }${BASE_PATH}`
-    const redirectTo = isInsideOAuthFlow
-      ? `${redirectUrlBase}/authorize?auth_id=${searchParams.auth_id}${searchParams.token && `&token=${searchParams.token}`}`
-      : `${redirectUrlBase}/sign-in`
+
+    let redirectTo: string
+
+    if (isInsideOAuthFlow) {
+      redirectTo = `${redirectUrlBase}/authorize?auth_id=${searchParams.auth_id}${searchParams.token && `&token=${searchParams.token}`}`
+    } else {
+      // Use getRedirectToPath to handle redirect_to parameter and other query params
+      const { returnTo } = router.query
+      const basePath = returnTo || '/sign-in'
+      const fullPath = buildPathWithParams(basePath as string)
+      const fullRedirectUrl = `${redirectUrlBase}${fullPath}`
+      redirectTo = fullRedirectUrl
+    }
 
     signup({
       email,