fix: restore /create fallback and improve component structure

- Restore original routing: redirect to /create when no organisations remain after deletion
- Improve GeneralTab component structure with semantic divs and gap-2 spacing
- Add clarifying comments for API requirements and routing decisions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: talissoncosta

frontend/web/components/pages/organisation-settings/tabs/general-tab/index.tsx

@@ -13,11 +13,13 @@ type GeneralTabProps = {
 
 export const GeneralTab = ({ organisation }: GeneralTabProps) => {
   return (
-    <div className='col-md-8'>
-      <SettingTitle>Organisation Information</SettingTitle>
-      <JSONReference title='Organisation' json={organisation} />
-      <div className='mt-2'>
+    <div className='col-md-8 d-flex flex-column gap-2'>
+      <div>
+        <SettingTitle>Organisation Information</SettingTitle>
+        <JSONReference title='Organisation' json={organisation} />
         <OrganisationInformation organisation={organisation} />
+      </div>
+      <div>
         <SettingTitle>Admin Settings</SettingTitle>
         <Force2FASetting organisation={organisation} />
         <RestrictProjectCreationSetting organisation={organisation} />

frontend/web/components/pages/organisation-settings/tabs/general-tab/sections/DeleteOrganisation.tsx

@@ -27,7 +27,8 @@ export const DeleteOrganisation = ({
               if (nextOrgId) {
                 history.replace(`/organisation/${nextOrgId}/projects`)
               } else {
-                history.replace('/organisations')
+                // Redirect to /create when no organisations remain
+                history.replace('/create')
               }
             },
           })

frontend/web/components/pages/organisation-settings/tabs/general-tab/sections/admin-settings/Force2FASetting.tsx

@@ -15,7 +15,7 @@ export const Force2FASetting = ({ organisation }: Force2FASettingProps) => {
     await updateOrganisationWithToast(
       {
         force_2fa: !organisation.force_2fa,
-        name: organisation.name,
+        name: organisation.name, // name is required by API
       },
       organisation.id,
     )

frontend/web/components/pages/organisation-settings/tabs/general-tab/sections/admin-settings/RestrictProjectCreationSetting.tsx

@@ -21,7 +21,7 @@ export const RestrictProjectCreationSetting = ({
   const handleToggle = async () => {
     await updateOrganisationWithToast(
       {
-        name: organisation.name,
+        name: organisation.name, // name is required by API
         restrict_project_create_to_admin:
           !organisation.restrict_project_create_to_admin,
       },