docs: add consolidated dev URL reference and migrate /shop to /storefront

- Add Development URL Quick Reference section to url-routing overview
  with all login URLs, entry points, and full examples
- Replace /shop/ path segments with /storefront/ across 50 docs files
- Update file references: shop_pages.py → storefront_pages.py,
  templates/shop/ → templates/storefront/, api/v1/shop/ → api/v1/storefront/
- Preserve domain references (orion.shop) and /store/ staff dashboard paths
- Archive docs left unchanged (historical)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/architecture/frontend-detection.md

@@ -68,7 +68,7 @@ The `FrontendDetector` uses the following priority order:
 2. Path-based detection:
    - /admin/* or /api/v1/admin/*            → ADMIN
    - /store/* or /api/v1/store/*          → STORE
-   - /storefront/*, /shop/*, /stores/*     → STOREFRONT
+   - /storefront/*, /stores/*               → STOREFRONT
    - /api/v1/platform/*                     → PLATFORM
 3. Store subdomain (orion.omsflow.lu)       → STOREFRONT
 4. Store context set by middleware         → STOREFRONT
@@ -88,8 +88,8 @@ STORE_PATH_PREFIXES = ("/store/", "/api/v1/store")
 STOREFRONT_PATH_PREFIXES = (
     "/storefront",
     "/api/v1/storefront",
-    "/shop",           # Legacy support
-    "/api/v1/shop",    # Legacy support
+    "/shop",           # Legacy support (redirects to /storefront)
+    "/api/v1/shop",    # Legacy support (redirects to /api/v1/storefront)
     "/stores/",       # Path-based store access
 )