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/modules/pwa/pwaInstall.ts

@@ -96,6 +96,11 @@ export function initPwaInstallPromptListener() {
   if (installListenerInitialized || typeof window === 'undefined') return
   installListenerInitialized = true
 
+  window.addEventListener('beforeinstallprompt', (e) => {
+    e.preventDefault()
+    deferredInstallPrompt = e as BeforeInstallPromptEvent
+  })
+
   window.addEventListener(PWA_MANIFEST_READY_EVENT, (event) => {
     const installEvent = (event as CustomEvent<{ installEvent?: Event | null }>).detail?.installEvent
 
@@ -103,6 +108,10 @@ export function initPwaInstallPromptListener() {
       deferredInstallPrompt = installEvent as BeforeInstallPromptEvent
     }
   })
+
+  window.addEventListener('appinstalled', () => {
+    deferredInstallPrompt = null
+  })
 }
 
 export async function triggerNativePwaInstall() {