Phase 4: Group create modal E2E spec

[aasimsyed]

Subtask of #1994 (Phase 4 of E2E Create Flows epic). Depends on Phase 1 (#1995 — Create dropdown and modal page objects). Follow the same patterns as Phase 2 (#1996 — Event create) and Phase 3 (#2039 — Organization create).

Scope

Add E2E spec for the Group create modal (ModalCreateGroup): open from Create dropdown, assert modal and its two steps (Group details → Location), validation (missing name and/or organization, etc.), full flow through submit, Previous button, and modal close.

Deliverables

1. Spec file

• Add frontend/test-e2e/specs/all/create-flows/group-create-modal.spec.ts.
• beforeEach: Navigate to a page where sidebar is visible (e.g. /en or /home); use default global storage state (signed-in); open left sidebar (newSidebarLeft(page), sidebarLeft.open()); open Create dropdown and click New group (newCreateDropdown(page), createDropdown.clickNewGroup()). Use newCreateGroupModal(page) in tests as needed.

2. Test cases

• Modal opens — After Create → New group, assert modal-ModalCreateGroup visible and heading for “Create a New Group” (or i18n via getEnglishText("i18n.components.modal_create_group.create_new_group")).
• Step 1 — Group details validation — Omit required fields (e.g. name, description/tagline as required by the form, or no organization selected); click Next step; assert validation messages and modal stays open.
• Step 1 → 2 — Details filled — Fill name, description/tagline, select an organization from the combobox; click Next step; assert step 2 (Location: country, city) visible.
• Full flow — Group details (with org) → Location → Submit. Assert modal closes; optionally assert no error or success toast.
• Previous button — From step 2, click Previous; assert step 1 visible with data retained.
• Modal close — Open modal, click data-testid="modal-close-button"; assert modal hidden.

3. Notes

• Group details require a parent organization in the combobox; rely on backend/seed or fixtures (same theme as event create org combobox).
• Mirror locator and interaction style from CreateGroupModal (frontend/test-e2e/component-objects/CreateGroupModal.ts) and from event-create-modal.spec.ts / organization-create-modal.spec.ts where applicable.
• Use fixed locale (e.g. en) and getEnglishText() for heading and button assertions.

[andrewtavis]

Note: The work from #1998 could be referenced for completing this issue :)