feat: multi-module improvements across merchant, store, i18n, and customer systems

- Fix platform-grouped merchant sidebar menu with core items at root level
- Add merchant store management (detail page, create store, team page)
- Fix store settings 500 error by removing dead stripe/API tab
- Move onboarding translations to module-owned locale files
- Fix onboarding banner i18n with server-side rendering + context inheritance
- Refactor login language selectors to use languageSelector() function (LANG-002)
- Move HTTPException handling to global exception handler in merchant routes (API-003)
- Add language selector to all login pages and portal headers
- Fix customer module: drop order stats from customer model, add to orders module
- Fix admin menu config visibility for super admin platform context
- Fix storefront auth and layout issues
- Add missing i18n translations for onboarding steps (en/fr/de/lb)

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

app/modules/core/routes/pages/admin.py

@@ -18,6 +18,7 @@ from app.modules.core.utils.page_context import get_admin_context
 from app.modules.enums import FrontendType
 from app.modules.tenancy.models import User
 from app.templates_config import templates
+from app.utils.i18n import get_jinja2_globals
 
 router = APIRouter()
 
@@ -57,10 +58,13 @@ async def admin_login_page(
     if current_user:
         return RedirectResponse(url="/admin/dashboard", status_code=302)
 
-    return templates.TemplateResponse("tenancy/admin/login.html", {
+    language = getattr(request.state, "language", "en")
+    context = {
         "request": request,
-        "current_language": getattr(request.state, "language", "en"),
-    })
+        "current_language": language,
+        **get_jinja2_globals(language),
+    }
+    return templates.TemplateResponse("tenancy/admin/login.html", context)
 
 
 @router.get("/select-platform", response_class=HTMLResponse, include_in_schema=False)
@@ -69,18 +73,15 @@ async def admin_select_platform_page(
     current_user: User | None = Depends(get_current_admin_optional),
 ):
     """
-    Render platform selection page for platform admins.
+    Render platform selection page for admins.
 
     Platform admins with access to multiple platforms must select
     which platform they want to manage before accessing the dashboard.
-    Super admins are redirected to dashboard (they have global access).
+    Super admins can optionally select a platform to scope their view.
     """
     if not current_user:
         return RedirectResponse(url="/admin/login", status_code=302)
 
-    if current_user.is_super_admin:
-        return RedirectResponse(url="/admin/dashboard", status_code=302)
-
     return templates.TemplateResponse(
         "tenancy/admin/select-platform.html",
         {"request": request, "user": current_user},
@@ -124,26 +125,6 @@ async def admin_settings_page(
     )
 
 
-@router.get("/my-menu", response_class=HTMLResponse, include_in_schema=False)
-async def admin_my_menu_config(
-    request: Request,
-    current_user: User = Depends(require_menu_access("my-menu", FrontendType.ADMIN)),
-    db: Session = Depends(get_db),
-):
-    """
-    Render personal menu configuration page for super admins.
-    Allows super admins to customize their own sidebar menu.
-    """
-    # Only super admins can configure their own menu
-    if not current_user.is_super_admin:
-        return RedirectResponse(url="/admin/settings", status_code=302)
-
-    return templates.TemplateResponse(
-        "core/admin/my-menu-config.html",
-        get_admin_context(request, db, current_user),
-    )
-
-
 @router.get("/features", response_class=HTMLResponse, include_in_schema=False)
 async def admin_features_page(
     request: Request,

app/modules/core/routes/pages/merchant.py

@@ -24,6 +24,7 @@ from app.modules.core.utils.page_context import get_context_for_frontend
 from app.modules.enums import FrontendType
 from app.modules.tenancy.schemas.auth import UserContext
 from app.templates_config import templates
+from app.utils.i18n import get_jinja2_globals
 
 ROUTE_CONFIG = {
     "prefix": "",
@@ -67,10 +68,13 @@ async def merchant_login_page(
     if current_user:
         return RedirectResponse(url="/merchants/dashboard", status_code=302)
 
-    return templates.TemplateResponse("tenancy/merchant/login.html", {
+    language = getattr(request.state, "language", "fr")
+    context = {
         "request": request,
-        "current_language": getattr(request.state, "language", "fr"),
-    })
+        "current_language": language,
+        **get_jinja2_globals(language),
+    }
+    return templates.TemplateResponse("tenancy/merchant/login.html", context)
 
 
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