fix(i18n): complete translations for production launch and fix CMS store context

- Replace CMS custom get_store_context() with core utility (same fix as loyalty)
- Add 85 missing translation keys across fr/de/lb for core, tenancy, messaging,
  customers, and loyalty modules
- Convert 21 client-side $t() calls to server-side _() in 9 loyalty templates
- Fix 3 broken translation keys in store/cards.html

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

app/modules/loyalty/templates/loyalty/shared/program-form.html

@@ -305,7 +305,7 @@
         <button type="submit" :disabled="saving"
                 class="flex items-center px-6 py-2 text-sm font-medium text-white bg-purple-600 rounded-lg hover:bg-purple-700 disabled:opacity-50">
             <span x-show="saving" x-html="$icon('spinner', 'w-4 h-4 mr-2 animate-spin')"></span>
-            <span x-text="saving ? $t('loyalty.common.saving') : (isNewProgram ? $t('loyalty.shared.program_form.create_program') : $t('loyalty.shared.program_form.save_changes'))"></span>
+            <span x-text="saving ? '{{ _('loyalty.common.saving')|replace("'", "\\'") }}' : (isNewProgram ? '{{ _('loyalty.shared.program_form.create_program')|replace("'", "\\'") }}' : '{{ _('loyalty.shared.program_form.save_changes')|replace("'", "\\'") }}')"></span>
         </button>
     </div>
 </div>

app/modules/loyalty/templates/loyalty/shared/program-view.html

@@ -163,7 +163,7 @@
                 <p class="text-xs text-gray-500 dark:text-gray-400 mb-1">{{ _('loyalty.shared.program_view.staff_pin_required') }}</p>
                 <span class="inline-flex items-center px-2 py-1 text-xs font-semibold leading-tight rounded-full"
                       :class="program?.require_staff_pin ? 'text-green-700 bg-green-100 dark:bg-green-700 dark:text-green-100' : 'text-gray-700 bg-gray-100 dark:bg-gray-700 dark:text-gray-100'">
-                    <span x-text="program?.require_staff_pin ? $t('loyalty.common.yes') : $t('loyalty.common.no')"></span>
+                    <span x-text="program?.require_staff_pin ? '{{ _('loyalty.common.yes')|replace("'", "\\'") }}' : '{{ _('loyalty.common.no')|replace("'", "\\'") }}'"></span>
                 </span>
             </div>
         </div>