[US-013] Set store as 'live now' manually #33
Description
Epic: EP-02 — Store Onboarding & Link Management \nPriority: Must Have (M) \nStory Points: 3 \nSprint: Sprint 1\n\n### User Story\nAs a store admin, I want to set my store as 'live now' manually so users see I am broadcasting.\n\n### Acceptance Criteria\n- [ ] Toggle button on store admin dashboard\n- [ ] is_live field updated in DB immediately\n- [ ] Live status visible to end users in real-time (WebSocket push)\n- [ ] Live indicator shown on store card in browse/search\n- [ ] Auto-reset to offline after 12 hours if not manually turned off\n\n### Technical Notes\n- PATCH /api/stores/{id}/live-status/\n- Django Channels broadcasts to store_{id} WebSocket group\n- Redis pub/sub for real-time fan-out