Port modular features into boursecu and fix desktop login UX.

Add support chat, piggy funds, PWA banner, notification/SSE sync, and messenger legacy guards while keeping boursecu theme; also balance login panels and unblock login navigation.

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

src/components/pwa/PwaInstallBanner.vue

@@ -0,0 +1,70 @@
+<script setup lang="ts">
+defineProps<{
+  visible: boolean
+}>()
+
+const emit = defineEmits<{
+  install: []
+  dismiss: []
+}>()
+</script>
+
+<template>
+  <Transition name="pwa-install-banner">
+    <button
+      v-if="visible"
+      type="button"
+      class="pwa-install-banner"
+      @click="emit('install')"
+    >
+      نصب وب اپلیکیشن
+    </button>
+  </Transition>
+</template>
+
+<style scoped lang="less">
+.pwa-install-banner {
+  position: fixed;
+  left: 50%;
+  z-index: 5095;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: fit-content;
+  max-width: calc(100% - 24px);
+  padding: 10px 18px;
+  border-radius: 999px;
+  background: #fff;
+  border: 1px solid rgba(15, 23, 42, 0.08);
+  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.12);
+  font-size: 13px;
+  font-weight: 700;
+  color: @App-primary-color;
+  white-space: nowrap;
+  cursor: pointer;
+  transform: translateX(-50%);
+  bottom: calc(var(--app-bottom-chrome-height, 108px) + 8px);
+}
+
+@media screen and (min-width: 768px) {
+  .pwa-install-banner {
+    /* بالاتر از متن نسخه در پنل برند لاگین */
+    bottom: 64px;
+  }
+
+  html.app-layout--desktop:not(.app-layout--desktop-no-sidebar) .pwa-install-banner {
+    left: calc(50% - var(--app-desktop-sidebar-width, 260px) / 2);
+  }
+}
+
+.pwa-install-banner-enter-active,
+.pwa-install-banner-leave-active {
+  transition: opacity 0.2s ease, transform 0.2s ease;
+}
+
+.pwa-install-banner-enter-from,
+.pwa-install-banner-leave-to {
+  opacity: 0;
+  transform: translate(-50%, 12px);
+}
+</style>