fix(bot): issue #128 — empty category menus, duplicate country lists, DB typo+desync migration

- getCategoriesWithProductsByLocationId: filter districts to categories with real in-stock/mono products; empty → no_categories message + back button + answerCallbackQuery
- Main-menu debounce (1200ms) in routes.js for products/profile/wallets/purchases — no duplicate Select-your-country on rapid taps
- Migration 012: fix typos (Centr→Center, Chiken→Chicken, Brusel→Brussels, Sever→North) + re-enable locations that have in-stock products (desync fix)
- Tests updated (48 pass); bump v1.2.3

src/admin/views/partials/app-sidebar.ejs

@@ -28,7 +28,7 @@
             <svg class="sa-icon sa-thin">
                 <use href="/icons/sprite.svg#tag"></use>
             </svg>
-            <span class="fs-xs opacity-70">v1.2.2</span>
+            <span class="fs-xs opacity-70">v1.2.3</span>
         </div>
     </div>
 </aside>
@@ -43,10 +43,10 @@
             </div>
             <div class="modal-body">
                 <div class="alert alert-info mb-3">
-                    <strong>Current:</strong> v1.2.2 &middot; 2026-08-04
+                    <strong>Current:</strong> v1.2.3 &middot; 2026-08-04
                 </div>
 
-                <h6 class="fw-bold mb-2">v1.2.2 <span class="text-muted fs-sm">&mdash; 2026-08-04</span></h6>
+                <h6 class="fw-bold mb-2">v1.2.3 <span class="text-muted fs-sm">&mdash; 2026-08-04</span></h6>
                 <ul class="small mb-3">
                     <li><span class="badge bg-info">refactor</span> Removed deposit amount-selection step; deposit_wallet_ now goes directly to Mercuryo instructions</li>
                     <li><span class="badge bg-primary">feat</span> Updated Mercuryo button text to include VISA/Mastercard branding in all locales</li>