fix: template query param stripped during login views (#6677)

Fixes issue where query params from
https://github.com/Comfy-Org/ComfyUI_frontend/pull/6593 are stripped
during the login/signup views/flow by storing initial params in session
storage via router plugin.



https://github.com/user-attachments/assets/51642e8c-af5c-43ef-ab7d-133bc7e511aa




┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6677-fix-template-query-param-stripped-during-login-views-2aa6d73d365081a1bdc7d22b35f72a77)
by [Unito](https://www.unito.io)

src/platform/workflow/templates/composables/useTemplateUrlLoader.ts

@@ -2,6 +2,9 @@ import { useToast } from 'primevue/usetoast'
 import { useI18n } from 'vue-i18n'
 import { useRoute, useRouter } from 'vue-router'
 
+import { clearPreservedQuery } from '@/platform/navigation/preservedQueryManager'
+import { PRESERVED_QUERY_NAMESPACES } from '@/platform/navigation/preservedQueryNamespaces'
+
 import { useTemplateWorkflows } from './useTemplateWorkflows'
 
 /**
@@ -21,6 +24,7 @@ export function useTemplateUrlLoader() {
   const { t } = useI18n()
   const toast = useToast()
   const templateWorkflows = useTemplateWorkflows()
+  const TEMPLATE_NAMESPACE = PRESERVED_QUERY_NAMESPACES.TEMPLATE
 
   /**
    * Validates parameter format to prevent path traversal and injection attacks
@@ -97,6 +101,7 @@ export function useTemplateUrlLoader() {
       })
     } finally {
       cleanupUrlParams()
+      clearPreservedQuery(TEMPLATE_NAMESPACE)
     }
   }