feat: add profile, class unenroll, notify toggles, and keep sidebar width

Give admins a profile password page, class removal, and SMS/email/bot checkboxes, and stop the sidebar from shrinking on edit pages.

src/components/layout/AppSidebar.vue

@@ -1,6 +1,6 @@
 <!-- /src/components/layout/AppSidebar.vue -->
 <template>
-  <div class="app-sidebar p-3 surface-card border-left-1 border-color flex flex-column h-full">
+  <div class="app-sidebar p-3 surface-card border-left-1 border-color flex flex-column h-full flex-shrink-0">
     <div class="logo flex align-items-center gap-3 px-2 py-3 mb-3 border-bottom-1 border-color">
       <i class="pi pi-graduation-cap text-primary text-3xl"></i>
       <span class="font-bold text-xl text-color">گام نو</span>
@@ -62,11 +62,16 @@ function isMenuActive(to) {
 <style lang="scss" scoped>
 .app-sidebar {
   width: 240px;
+  min-width: 240px;
+  max-width: 240px;
+  flex-shrink: 0;
   min-height: 100vh;
 }
 .menu-item {
   color: var(--text-secondary);
   text-decoration: none;
+  white-space: nowrap;
+  flex-shrink: 0;
   &:hover {
     background-color: var(--surface-hover);
     color: var(--text-primary);
@@ -76,5 +81,8 @@ function isMenuActive(to) {
     color: var(--primary-color);
     font-weight: 700;
   }
+  span {
+    white-space: nowrap;
+  }
 }
 </style>