feat(tenancy): add merchant team CRUD with multi-store hub view

The merchant team page was read-only. Now merchant owners can invite,
edit roles, and remove team members across all their stores from a
single hub view.

Architecture: No new models — delegates to existing store_team_service.
Members are deduplicated across stores with per-store role badges.

New:
- 5 API endpoints: GET team (member-centric), GET store roles, POST
  invite (multi-store), PUT update role, DELETE remove member
- merchant-team.js Alpine component with invite/edit/remove modals
- Full CRUD template with stats cards, store filter, member table
- 7 Pydantic schemas for merchant team request/response
- 2 service methods: validate_store_ownership, get_merchant_team_members
- 25 new i18n keys across 4 tenancy locales + 1 core common key

Tests: 434 tenancy tests passing, arch-check green.

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

app/modules/tenancy/locales/de.json

@@ -12,20 +12,45 @@
         "team": "Team"
     },
     "team": {
-        "title": "Team",
-        "members": "Mitglieder",
+        "actions": "Aktionen",
+        "active": "Aktiv",
         "add_member": "Mitglied hinzufügen",
+        "all_stores": "Alle Filialen",
+        "edit_member": "Mitglied bearbeiten",
+        "editor": "Bearbeiter",
+        "email": "E-Mail",
+        "email_placeholder": "E-Mail-Adresse eingeben",
+        "error_title": "Fehler beim Laden des Teams",
+        "first_name": "Vorname",
+        "invite_first_member": "Laden Sie Ihr erstes Teammitglied ein",
         "invite_member": "Mitglied einladen",
+        "invitation_accepted": "Einladung angenommen",
+        "invitation_sent": "Einladung gesendet",
+        "last_name": "Nachname",
+        "loading_team": "Team wird geladen...",
+        "manage_members_description": "Teammitglieder über alle Filialen verwalten",
+        "manager": "Manager",
+        "member": "Mitglied",
+        "member_stores": "Filialen des Mitglieds",
+        "members": "Mitglieder",
+        "no_members_description": "Laden Sie Teammitglieder ein um Ihre Filialen zu verwalten",
+        "no_members_title": "Noch keine Teammitglieder",
+        "no_role": "Keine Rolle",
+        "owner": "Inhaber",
+        "pending_invitations": "Ausstehende Einladungen",
+        "permissions": "Berechtigungen",
+        "remove_confirmation": "Sind Sie sicher, dass Sie entfernen möchten",
+        "remove_from_all_stores": "Aus allen Filialen entfernen",
         "remove_member": "Mitglied entfernen",
         "role": "Rolle",
-        "owner": "Inhaber",
-        "manager": "Manager",
-        "editor": "Bearbeiter",
-        "viewer": "Betrachter",
-        "permissions": "Berechtigungen",
-        "pending_invitations": "Ausstehende Einladungen",
-        "invitation_sent": "Einladung gesendet",
-        "invitation_accepted": "Einladung angenommen"
+        "select_stores": "Filialen auswählen",
+        "send_invitation": "Einladung senden",
+        "status": "Status",
+        "store_roles": "Filialrollen",
+        "stores_and_roles": "Filialen & Rollen",
+        "title": "Team",
+        "total_members": "Mitglieder gesamt",
+        "viewer": "Betrachter"
     },
     "messages": {
         "business_info_saved": "Business info saved",

app/modules/tenancy/locales/en.json

@@ -12,20 +12,45 @@
         "team": "Team"
     },
     "team": {
-        "title": "Team",
-        "members": "Members",
+        "actions": "Actions",
+        "active": "Active",
         "add_member": "Add Member",
+        "all_stores": "All Stores",
+        "edit_member": "Edit Member",
+        "editor": "Editor",
+        "email": "Email",
+        "email_placeholder": "Enter email address",
+        "error_title": "Error loading team",
+        "first_name": "First Name",
+        "invite_first_member": "Invite your first team member",
         "invite_member": "Invite Member",
+        "invitation_accepted": "Invitation Accepted",
+        "invitation_sent": "Invitation Sent",
+        "last_name": "Last Name",
+        "loading_team": "Loading team...",
+        "manage_members_description": "Manage team members across all your stores",
+        "manager": "Manager",
+        "member": "Member",
+        "member_stores": "Member's stores",
+        "members": "Members",
+        "no_members_description": "Invite team members to help manage your stores",
+        "no_members_title": "No team members yet",
+        "no_role": "No role",
+        "owner": "Owner",
+        "pending_invitations": "Pending Invitations",
+        "permissions": "Permissions",
+        "remove_confirmation": "Are you sure you want to remove",
+        "remove_from_all_stores": "Remove from all stores",
         "remove_member": "Remove Member",
         "role": "Role",
-        "owner": "Owner",
-        "manager": "Manager",
-        "editor": "Editor",
-        "viewer": "Viewer",
-        "permissions": "Permissions",
-        "pending_invitations": "Pending Invitations",
-        "invitation_sent": "Invitation Sent",
-        "invitation_accepted": "Invitation Accepted"
+        "select_stores": "Select Stores",
+        "send_invitation": "Send Invitation",
+        "status": "Status",
+        "store_roles": "Store Roles",
+        "stores_and_roles": "Stores & Roles",
+        "title": "Team",
+        "total_members": "Total Members",
+        "viewer": "Viewer"
     },
     "messages": {
         "business_info_saved": "Business info saved",

app/modules/tenancy/locales/fr.json

@@ -12,20 +12,45 @@
         "team": "Équipe"
     },
     "team": {
-        "title": "Équipe",
-        "members": "Membres",
+        "actions": "Actions",
+        "active": "Actifs",
         "add_member": "Ajouter un membre",
+        "all_stores": "Tous les magasins",
+        "edit_member": "Modifier le membre",
+        "editor": "Éditeur",
+        "email": "E-mail",
+        "email_placeholder": "Saisir l'adresse e-mail",
+        "error_title": "Erreur lors du chargement",
+        "first_name": "Prénom",
+        "invite_first_member": "Invitez votre premier membre",
         "invite_member": "Inviter un membre",
+        "invitation_accepted": "Invitation acceptée",
+        "invitation_sent": "Invitation envoyée",
+        "last_name": "Nom de famille",
+        "loading_team": "Chargement de l'équipe...",
+        "manage_members_description": "Gérer les membres de l'équipe sur tous vos magasins",
+        "manager": "Gestionnaire",
+        "member": "Membre",
+        "member_stores": "Magasins du membre",
+        "members": "Membres",
+        "no_members_description": "Invitez des membres pour gérer vos magasins",
+        "no_members_title": "Aucun membre encore",
+        "no_role": "Aucun rôle",
+        "owner": "Propriétaire",
+        "pending_invitations": "Invitations en attente",
+        "permissions": "Permissions",
+        "remove_confirmation": "Êtes-vous sûr de vouloir supprimer",
+        "remove_from_all_stores": "Supprimer de tous les magasins",
         "remove_member": "Retirer un membre",
         "role": "Rôle",
-        "owner": "Propriétaire",
-        "manager": "Gestionnaire",
-        "editor": "Éditeur",
-        "viewer": "Lecteur",
-        "permissions": "Permissions",
-        "pending_invitations": "Invitations en attente",
-        "invitation_sent": "Invitation envoyée",
-        "invitation_accepted": "Invitation acceptée"
+        "select_stores": "Sélectionner les magasins",
+        "send_invitation": "Envoyer l'invitation",
+        "status": "Statut",
+        "store_roles": "Rôles par magasin",
+        "stores_and_roles": "Magasins et rôles",
+        "title": "Équipe",
+        "total_members": "Membres totaux",
+        "viewer": "Lecteur"
     },
     "messages": {
         "business_info_saved": "Business info saved",

app/modules/tenancy/locales/lb.json

@@ -12,20 +12,45 @@
         "team": "Team"
     },
     "team": {
-        "title": "Team",
-        "members": "Memberen",
+        "actions": "Aktiounen",
+        "active": "Aktiv",
         "add_member": "Member derbäisetzen",
+        "all_stores": "All Geschäfter",
+        "edit_member": "Member änneren",
+        "editor": "Editeur",
+        "email": "E-Mail",
+        "email_placeholder": "E-Mail-Adress aginn",
+        "error_title": "Feeler beim Lueden vum Team",
+        "first_name": "Virnumm",
+        "invite_first_member": "Invitéiert Äert éischt Teammember",
         "invite_member": "Member invitéieren",
+        "invitation_accepted": "Invitatioun ugeholl",
+        "invitation_sent": "Invitatioun geschéckt",
+        "last_name": "Nonumm",
+        "loading_team": "Team gëtt gelueden...",
+        "manage_members_description": "Teammemberen iwwer all Geschäfter verwalten",
+        "manager": "Manager",
+        "member": "Member",
+        "member_stores": "Geschäfter vum Member",
+        "members": "Memberen",
+        "no_members_description": "Invitéiert Teammemberen fir Är Geschäfter ze verwalten",
+        "no_members_title": "Nach keng Teammemberen",
+        "no_role": "Keng Roll",
+        "owner": "Proprietär",
+        "pending_invitations": "Aussteesend Invitatiounen",
+        "permissions": "Rechter",
+        "remove_confirmation": "Sidd Dir sécher, datt Dir ewechhuele wëllt",
+        "remove_from_all_stores": "Vun all Geschäfter ewechhuelen",
         "remove_member": "Member ewechhuelen",
         "role": "Roll",
-        "owner": "Proprietär",
-        "manager": "Manager",
-        "editor": "Editeur",
-        "viewer": "Betruechter",
-        "permissions": "Rechter",
-        "pending_invitations": "Aussteesend Invitatiounen",
-        "invitation_sent": "Invitatioun geschéckt",
-        "invitation_accepted": "Invitatioun ugeholl"
+        "select_stores": "Geschäfter wielen",
+        "send_invitation": "Invitatioun schécken",
+        "status": "Status",
+        "store_roles": "Geschäftsrollen",
+        "stores_and_roles": "Geschäfter & Rollen",
+        "title": "Team",
+        "total_members": "Memberen total",
+        "viewer": "Betruechter"
     },
     "messages": {
         "business_info_saved": "Business info saved",