refactor: complete JS i18n migration for confirm dialogs and toast messages

Migrate 34 hardcoded user-facing strings to use I18n.t() for translation:

- CMS: media file operations (5 strings)
- Marketplace: Letzshop integration (16 strings)
- Messaging: notifications, messages, email templates (5 strings)
- Tenancy: platform modules, menu config, theme (5 strings)
- Core: menu config, settings, storefront cart (5 strings)
- Catalog: product creation (3 strings)
- Utils: clipboard operations (2 strings)

Added confirmations and messages keys to module locale files.
Added I18n.loadModule() calls to JS files that were missing them.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/tenancy/locales/en.json

@@ -0,0 +1,88 @@
+{
+  "team": {
+    "title": "Team",
+    "members": "Members",
+    "add_member": "Add Member",
+    "invite_member": "Invite Member",
+    "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"
+  },
+  "messages": {
+    "business_info_saved": "Business info saved",
+    "marketplace_settings_saved": "Marketplace settings saved",
+    "please_enter_a_url_first": "Please enter a URL first",
+    "could_not_validate_url_it_may_still_work": "Could not validate URL - it may still work",
+    "localization_settings_saved": "Localization settings saved",
+    "failed_to_load_email_settings": "Failed to load email settings",
+    "from_email_and_from_name_are_required": "From Email and From Name are required",
+    "email_settings_saved": "Email settings saved",
+    "please_enter_a_test_email_address": "Please enter a test email address",
+    "please_save_your_email_settings_first": "Please save your email settings first",
+    "test_email_sent_check_your_inbox": "Test email sent! Check your inbox.",
+    "please_fix_the_errors_before_saving": "Please fix the errors before saving",
+    "profile_updated_successfully": "Profile updated successfully",
+    "email_is_required": "Email is required",
+    "invitation_sent_successfully": "Invitation sent successfully",
+    "team_member_updated": "Team member updated",
+    "team_member_removed": "Team member removed",
+    "invalid_company_url": "Invalid company URL",
+    "failed_to_load_company_details": "Failed to load company details",
+    "company_deleted_successfully": "Company deleted successfully",
+    "company_details_refreshed": "Company details refreshed",
+    "invalid_admin_user_url": "Invalid admin user URL",
+    "failed_to_load_admin_user_details": "Failed to load admin user details",
+    "you_cannot_deactivate_your_own_account": "You cannot deactivate your own account",
+    "you_cannot_delete_your_own_account": "You cannot delete your own account",
+    "admin_user_deleted_successfully": "Admin user deleted successfully",
+    "admin_user_details_refreshed": "Admin user details refreshed",
+    "failed_to_initialize_page": "Failed to initialize page",
+    "failed_to_load_company": "Failed to load company",
+    "company_updated_successfully": "Company updated successfully",
+    "ownership_transferred_successfully": "Ownership transferred successfully",
+    "theme_saved_successfully": "Theme saved successfully",
+    "failed_to_apply_preset": "Failed to apply preset",
+    "theme_reset_to_default": "Theme reset to default",
+    "failed_to_reset_theme": "Failed to reset theme",
+    "failed_to_load_vendors": "Failed to load vendors",
+    "vendor_deleted_successfully": "Vendor deleted successfully",
+    "vendors_list_refreshed": "Vendors list refreshed",
+    "invalid_user_url": "Invalid user URL",
+    "failed_to_load_user_details": "Failed to load user details",
+    "user_deleted_successfully": "User deleted successfully",
+    "user_details_refreshed": "User details refreshed",
+    "invalid_vendor_url": "Invalid vendor URL",
+    "failed_to_load_vendor_details": "Failed to load vendor details",
+    "no_vendor_loaded": "No vendor loaded",
+    "subscription_created_successfully": "Subscription created successfully",
+    "vendor_details_refreshed": "Vendor details refreshed",
+    "failed_to_load_users": "Failed to load users",
+    "failed_to_delete_user": "Failed to delete user",
+    "failed_to_load_admin_users": "Failed to load admin users",
+    "failed_to_load_admin_user": "Failed to load admin user",
+    "you_cannot_demote_yourself_from_super_ad": "You cannot demote yourself from super admin",
+    "platform_assigned_successfully": "Platform assigned successfully",
+    "platform_admin_must_be_assigned_to_at_le": "Platform admin must be assigned to at least one platform",
+    "platform_removed_successfully": "Platform removed successfully",
+    "please_fix_the_errors_before_submitting": "Please fix the errors before submitting",
+    "failed_to_load_vendor": "Failed to load vendor",
+    "vendor_updated_successfully": "Vendor updated successfully",
+    "all_contact_fields_reset_to_company_defa": "All contact fields reset to company defaults",
+    "failed_to_load_user": "Failed to load user",
+    "user_updated_successfully": "User updated successfully"
+  },
+  "confirmations": {
+    "enable_all_modules": "This will enable all modules. Continue?",
+    "disable_optional_modules": "This will disable all optional modules, keeping only core modules. Continue?",
+    "reset_theme": "Reset theme to default? This cannot be undone.",
+    "show_all_menu_items": "This will show all menu items. Continue?",
+    "hide_all_menu_items": "This will hide all menu items (except mandatory ones). You can then enable the ones you want. Continue?"
+  }
+}