fix(ui): repair PWA install, credit footer, and boursecu copy

Make install guide and BasicButton clicks reliable, align montzar credit bar, remove calculator quick action, and use مس in about-software default text.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/components/AppCreditLink.vue

@@ -7,11 +7,16 @@
     :class="`app-credit-link--${variant}`"
   >
     <span class="app-credit-link__text">توسعه و طراحی توسط</span>
-    <img src="/logo-montzar.png" alt="montzar" class="app-credit-link__logo" />
+    <img :src="logoSrc" alt="montzar" class="app-credit-link__logo" />
   </a>
 </template>
 
 <script lang="ts" setup>
+const logoSrc = `${import.meta.env.BASE_URL || '/'}logo-montzar.png`.replace(
+  /([^:]\/)\/+/g,
+  '$1',
+)
+
 withDefaults(
   defineProps<{
     variant?: 'mobile' | 'sidebar' | 'float' | 'tv'