refactor: complete module-driven architecture migration

This commit completes the migration to a fully module-driven architecture:

## Models Migration
- Moved all domain models from models/database/ to their respective modules:
  - tenancy: User, Admin, Vendor, Company, Platform, VendorDomain, etc.
  - cms: MediaFile, VendorTheme
  - messaging: Email, VendorEmailSettings, VendorEmailTemplate
  - core: AdminMenuConfig
- models/database/ now only contains Base and TimestampMixin (infrastructure)

## Schemas Migration
- Moved all domain schemas from models/schema/ to their respective modules:
  - tenancy: company, vendor, admin, team, vendor_domain
  - cms: media, image, vendor_theme
  - messaging: email
- models/schema/ now only contains base.py and auth.py (infrastructure)

## Routes Migration
- Moved admin routes from app/api/v1/admin/ to modules:
  - menu_config.py -> core module
  - modules.py -> tenancy module
  - module_config.py -> tenancy module
- app/api/v1/admin/ now only aggregates auto-discovered module routes

## Menu System
- Implemented module-driven menu system with MenuDiscoveryService
- Extended FrontendType enum: PLATFORM, ADMIN, VENDOR, STOREFRONT
- Added MenuItemDefinition and MenuSectionDefinition dataclasses
- Each module now defines its own menu items in definition.py
- MenuService integrates with MenuDiscoveryService for template rendering

## Documentation
- Updated docs/architecture/models-structure.md
- Updated docs/architecture/menu-management.md
- Updated architecture validation rules for new exceptions

## Architecture Validation
- Updated MOD-019 rule to allow base.py in models/schema/
- Created core module exceptions.py and schemas/ directory
- All validation errors resolved (only warnings remain)

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

app/modules/tenancy/static/admin/js/admin-user-edit.js

@@ -29,6 +29,9 @@ function adminUserEditPage() {
 
         // Initialize
         async init() {
+            // Load i18n translations
+            await I18n.loadModule('tenancy');
+
             adminUserEditLog.info('=== ADMIN USER EDIT PAGE INITIALIZING ===');
 
             // Prevent multiple initializations
@@ -52,7 +55,7 @@ function adminUserEditPage() {
                 await this.loadAllPlatforms();
             } else {
                 adminUserEditLog.error('No user ID in URL');
-                Utils.showToast('Invalid admin user URL', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.invalid_admin_user_url'), 'error');
                 setTimeout(() => window.location.href = '/admin/admin-users', 2000);
             }
 
@@ -94,7 +97,7 @@ function adminUserEditPage() {
 
             } catch (error) {
                 window.LogConfig.logError(error, 'Load Admin User');
-                Utils.showToast('Failed to load admin user', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.failed_to_load_admin_user'), 'error');
                 setTimeout(() => window.location.href = '/admin/admin-users', 2000);
             } finally {
                 this.loading = false;
@@ -137,7 +140,7 @@ function adminUserEditPage() {
 
             // Prevent self-demotion
             if (this.adminUser.id === this.currentUserId && !newStatus) {
-                Utils.showToast('You cannot demote yourself from super admin', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.you_cannot_demote_yourself_from_super_ad'), 'error');
                 return;
             }
 
@@ -180,7 +183,7 @@ function adminUserEditPage() {
 
             // Prevent self-deactivation
             if (this.adminUser.id === this.currentUserId) {
-                Utils.showToast('You cannot deactivate your own account', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.you_cannot_deactivate_your_own_account'), 'error');
                 return;
             }
 
@@ -228,7 +231,7 @@ function adminUserEditPage() {
                 // Reload admin user to get updated platforms
                 await this.loadAdminUser();
 
-                Utils.showToast('Platform assigned successfully', 'success');
+                Utils.showToast(I18n.t('tenancy.messages.platform_assigned_successfully'), 'success');
                 adminUserEditLog.info('Platform assigned successfully');
                 this.showPlatformModal = false;
                 this.selectedPlatformId = null;
@@ -245,7 +248,7 @@ function adminUserEditPage() {
         removePlatform(platformId) {
             // Validate: platform admin must have at least one platform
             if (this.adminUser.platforms.length <= 1) {
-                Utils.showToast('Platform admin must be assigned to at least one platform', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.platform_admin_must_be_assigned_to_at_le'), 'error');
                 return;
             }
 
@@ -272,7 +275,7 @@ function adminUserEditPage() {
                 // Reload admin user to get updated platforms
                 await this.loadAdminUser();
 
-                Utils.showToast('Platform removed successfully', 'success');
+                Utils.showToast(I18n.t('tenancy.messages.platform_removed_successfully'), 'success');
                 adminUserEditLog.info('Platform removed successfully');
 
             } catch (error) {
@@ -296,7 +299,7 @@ function adminUserEditPage() {
 
             // Prevent self-deletion
             if (this.adminUser.id === this.currentUserId) {
-                Utils.showToast('You cannot delete your own account', 'error');
+                Utils.showToast(I18n.t('tenancy.messages.you_cannot_delete_your_own_account'), 'error');
                 return;
             }
 
@@ -320,7 +323,7 @@ function adminUserEditPage() {
 
                 window.LogConfig.logApiCall('DELETE', url, null, 'response');
 
-                Utils.showToast('Admin user deleted successfully', 'success');
+                Utils.showToast(I18n.t('tenancy.messages.admin_user_deleted_successfully'), 'success');
                 adminUserEditLog.info('Admin user deleted successfully');
 
                 // Redirect to admin users list