refactor: migrate templates and static files to self-contained modules

Templates Migration:
- Migrate admin templates to modules (tenancy, billing, monitoring, marketplace, etc.)
- Migrate vendor templates to modules (tenancy, billing, orders, messaging, etc.)
- Migrate storefront templates to modules (catalog, customers, orders, cart, checkout, cms)
- Migrate public templates to modules (billing, marketplace, cms)
- Keep shared templates in app/templates/ (base.html, errors/, partials/, macros/)
- Migrate letzshop partials to marketplace module

Static Files Migration:
- Migrate admin JS to modules: tenancy (23 files), core (5 files), monitoring (1 file)
- Migrate vendor JS to modules: tenancy (4 files), core (2 files)
- Migrate shared JS: vendor-selector.js to core, media-picker.js to cms
- Migrate storefront JS: storefront-layout.js to core
- Keep framework JS in static/ (api-client, utils, money, icons, log-config, lib/)
- Update all template references to use module_static paths

Naming Consistency:
- Rename static/platform/ to static/public/
- Rename app/templates/platform/ to app/templates/public/
- Update all extends and static references

Documentation:
- Update module-system.md with shared templates documentation
- Update frontend-structure.md with new module JS organization

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

app/api/v1/storefront/__init__.py

@@ -5,63 +5,48 @@ Storefront API router aggregation.
 This module aggregates all storefront-related JSON API endpoints (public facing).
 Uses vendor context from middleware - no vendor_id in URLs.
 
-Endpoints:
-- Products: Browse catalog, search products (catalog module)
-- Cart: Shopping cart operations (cart module)
-- Orders: Order history viewing (orders module)
-- Checkout: Order placement (checkout module)
-- Auth: Customer login, registration, password reset (customers module)
-- Profile/Addresses: Customer profile management (customers module)
-- Messages: Customer messaging (messaging module)
-- Content Pages: CMS pages (cms module)
+AUTO-DISCOVERED MODULE ROUTES:
+- cart: Shopping cart operations
+- catalog: Browse catalog, search products
+- checkout: Order placement
+- cms: Content pages
+- customers: Auth, profile, addresses
+- messaging: Customer messaging
+- orders: Order history viewing
 
 Authentication:
 - Products, Cart, Content Pages: No auth required
 - Orders, Profile, Messages: Requires customer authentication
 - Auth: Public (login, register)
 
-Note: Routes are now served from their respective modules.
+Note: Routes are auto-discovered from app/modules/{module}/routes/api/storefront.py
 """
 
 from fastapi import APIRouter
 
-# Import module routers
-from app.modules.cart.routes.api import storefront_router as cart_router
-from app.modules.catalog.routes.api import storefront_router as catalog_router
-from app.modules.checkout.routes.api import storefront_router as checkout_router
-from app.modules.cms.routes.api.storefront import router as cms_storefront_router
-from app.modules.customers.routes.api import storefront_router as customers_router
-from app.modules.messaging.routes.api import storefront_router as messaging_router
-from app.modules.orders.routes.api import storefront_router as orders_router
-
 # Create storefront router
 router = APIRouter()
 
 # ============================================================================
-# STOREFRONT API ROUTES (All vendor-context aware via middleware)
+# Auto-discovered Module Routes
 # ============================================================================
+# Routes from self-contained modules are auto-discovered and registered.
+# Modules include: cart, catalog, checkout, cms, customers, messaging, orders
 
-# Customer authentication and account management (customers module)
-router.include_router(customers_router, tags=["storefront-auth", "storefront-profile", "storefront-addresses"])
+from app.modules.routes import get_storefront_api_routes
 
-# Product catalog browsing (catalog module)
-router.include_router(catalog_router, tags=["storefront-products"])
-
-# Shopping cart (cart module)
-router.include_router(cart_router, tags=["storefront-cart"])
-
-# Order placement (checkout module)
-router.include_router(checkout_router, tags=["storefront-checkout"])
-
-# Order history viewing (orders module)
-router.include_router(orders_router, tags=["storefront-orders"])
-
-# Customer messaging (messaging module)
-router.include_router(messaging_router, tags=["storefront-messages"])
-
-# CMS content pages (cms module)
-router.include_router(
-    cms_storefront_router, prefix="/content-pages", tags=["storefront-content-pages"]
-)
+for route_info in get_storefront_api_routes():
+    # Only pass prefix if custom_prefix is set (router already has internal prefix)
+    if route_info.custom_prefix:
+        router.include_router(
+            route_info.router,
+            prefix=route_info.custom_prefix,
+            tags=route_info.tags,
+        )
+    else:
+        router.include_router(
+            route_info.router,
+            tags=route_info.tags,
+        )
 
 __all__ = ["router"]