feat(tenancy): add delete button on table + add-to-store in edit modal

Table actions now show view + edit + delete (trash icon) for non-owner
members. Delete opens the existing remove-from-all-stores modal.

Edit modal enhanced with "Add to another store" section:
- Shows a dashed-border card with store dropdown + role dropdown + add button
- Only appears when the member is not yet in all merchant stores
- Uses the existing invite API to add the member to the selected store

i18n: 2 new keys (add_to_store, select_store) in 4 locales.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/tenancy/locales/lb.json

@@ -53,6 +53,8 @@
         "personal_info": "Perséinlech Informatiounen",
         "resend_invitation": "Aluedung nei schécken",
         "save_profile": "Profil späicheren",
+        "add_to_store": "Zu engem anere Shop derbäisetzen",
+        "select_store": "Shop auswielen...",
         "multiple_roles": "Méi Rollen",
         "view_member": "Member kucken",
         "account_information": "Konto Informatiounen",