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/language-i18n.md

@@ -186,7 +186,7 @@ function languageSelector(currentLang, enabledLanguages) {
 ### Rule FE-003: Language Selector Must Be In Shared JavaScript
 
 **Language selector function MUST be defined in:**
-- `static/shop/js/shop-layout.js` for storefront
+- `static/storefront/js/storefront-layout.js` for storefront
 - `static/store/js/init-alpine.js` for store dashboard
 
 ```javascript
@@ -444,7 +444,7 @@ static/locales/
             "title": "Tableau de bord"
         }
     },
-    "shop": {
+    "storefront": {
         "cart": {
             "empty": "Votre panier est vide"
         }
@@ -466,7 +466,7 @@ static/locales/
 
 ### Language Selector Implementation Checklist
 
-- [ ] Function defined in appropriate JS file (`shop-layout.js` or `init-alpine.js`)
+- [ ] Function defined in appropriate JS file (`storefront-layout.js` or `init-alpine.js`)
 - [ ] Function exported to `window.languageSelector`
 - [ ] Uses `tojson|safe` filter for language array
 - [ ] Provides default values for both parameters
@@ -492,14 +492,14 @@ static/locales/
 
 | File | Type | Notes |
 |------|------|-------|
-| `static/shop/js/shop-layout.js` | JS | `languageSelector()` for storefront |
+| `static/storefront/js/storefront-layout.js` | JS | `languageSelector()` for storefront |
 | `app/modules/core/static/store/js/init-alpine.js` | JS | `languageSelector()` for store dashboard |
 | `app/modules/core/static/admin/js/init-alpine.js` | JS | `languageSelector()` for admin |
 | `app/modules/core/static/merchant/js/init-alpine.js` | JS | `languageSelector()` for merchant |
 | `app/templates/store/partials/header.html` | Template | Store dashboard language selector |
 | `app/templates/admin/partials/header.html` | Template | Admin language selector |
 | `app/templates/merchant/partials/header.html` | Template | Merchant language selector |
-| `app/templates/shop/base.html` | Template | Storefront language selector |
+| `app/templates/storefront/base.html` | Template | Storefront language selector |
 | `app/modules/core/routes/api/platform.py` | API | Language endpoints (`/api/v1/platform/language/*`) |
 | `middleware/language.py` | Middleware | Language detection per frontend type |
 | `static/locales/*.json` | JSON | Translation files |