some UI improvements

frontend/src/components/admin/SegmentEditor.vue

@@ -26,10 +26,18 @@ const teamMembers = ref<{ name: string; student_number: string }[]>(
 const newMemberName = ref("");
 const newMemberNumber = ref("");
 
+function normaliseUrl(url: string): string {
+  const trimmed = url.trim();
+  if (trimmed && !/^https?:\/\//i.test(trimmed)) return `https://${trimmed}`;
+  return trimmed;
+}
+
 function handleSave() {
   const updates: { title?: string; content?: string; metadata?: Record<string, unknown> } = {};
   if (title.value !== props.segment.title) updates.title = title.value;
-  if (content.value !== props.segment.content) updates.content = content.value;
+  const savedContent =
+    props.segment.type === "iframe" ? normaliseUrl(content.value) : content.value;
+  if (savedContent !== props.segment.content) updates.content = savedContent;
   if (props.segment.type === "team") {
     metadata.value = { ...metadata.value, members: teamMembers.value };
   }
@@ -86,13 +94,17 @@ const assetAcceptMap: Record<string, string> = {
       <RichTextEditor v-if="segment.type === 'markdown'" v-model="content" />
 
       <!-- Iframe: URL input -->
+      <div v-else-if="segment.type === 'iframe'">
         <input
-        v-else-if="segment.type === 'iframe'"
           v-model="content"
           type="url"
           placeholder="https://..."
           class="w-full rounded border border-slate-300 px-3 py-2 text-sm focus:border-primary-400 focus:outline-none dark:border-slate-600 dark:bg-slate-700 dark:text-slate-100"
         />
+        <p class="mt-1 text-xs text-slate-400 dark:text-slate-500">
+          Most major sites (Google, GitHub, etc.) block embedding. Use dedicated embed URLs where available, e.g. YouTube's <code>youtube.com/embed/…</code>.
+        </p>
+      </div>
 
       <!-- PDF / Video / Audio: file upload + URL display -->
       <div v-else-if="segment.type === 'pdf' || segment.type === 'video' || segment.type === 'audio'">

frontend/src/components/layout/AppShell.vue

@@ -13,6 +13,8 @@ const { pages, fetchPages } = usePages();
 const { isAdmin, authHeaders } = useAdmin();
 
 const mobileNavOpen = ref(false);
+const scrolledDown = ref(false);
+const mainEl = ref<HTMLElement | null>(null);
 const siteTitle = ref("Untitled Site");
 const editingSiteTitle = ref(false);
 const siteTitleInput = ref("");
@@ -63,6 +65,14 @@ watch(pages, (loaded) => {
   }
 });
 
+function handleScroll(e: Event) {
+  scrolledDown.value = (e.target as HTMLElement).scrollTop > 200;
+}
+
+function scrollToTop() {
+  mainEl.value?.scrollTo({ top: 0, behavior: "smooth" });
+}
+
 onMounted(async () => {
   await Promise.all([loadSiteTitle(), fetchPages()]);
   if (pages.value.length > 0 && (route.path === "/" || route.path === "")) {
@@ -145,13 +155,30 @@ onMounted(async () => {
       </div>
 
       <!-- Scrollable content -->
-      <main class="flex-1 overflow-y-auto">
+      <main ref="mainEl" class="flex-1 overflow-y-auto" @scroll="handleScroll">
         <div class="mx-auto max-w-4xl px-6 py-10">
           <slot />
         </div>
       </main>
     </div>
   </div>
+
+  <!-- Scroll to top FAB -->
+  <Teleport to="body">
+    <Transition name="scroll-top-fade">
+      <button
+        v-if="scrolledDown"
+        class="fixed bottom-20 right-6 z-30 flex items-center gap-2 rounded-full bg-primary-300 px-5 py-3 font-medium text-gray-900 shadow-lg transition-all hover:bg-primary-400 hover:shadow-xl active:scale-95"
+        aria-label="Scroll to top"
+        @click="scrollToTop"
+      >
+        <svg class="h-5 w-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 15l7-7 7 7" />
+        </svg>
+        Back to top
+      </button>
+    </Transition>
+  </Teleport>
 </template>
 
 <style scoped>
@@ -172,4 +199,13 @@ onMounted(async () => {
 .sidebar-slide-leave-to {
   transform: translateX(-100%);
 }
+
+.scroll-top-fade-enter-active,
+.scroll-top-fade-leave-active {
+  transition: opacity 200ms ease;
+}
+.scroll-top-fade-enter-from,
+.scroll-top-fade-leave-to {
+  opacity: 0;
+}
 </style>

frontend/src/views/PageView.vue

@@ -161,7 +161,7 @@ async function handleReorder(ids: string[]) {
   <!-- Floating "Add section" FAB (admin only) -->
   <Teleport to="body">
     <button
-      v-if="isAdmin && currentPage && !currentPage.is_system"
+      v-if="isAdmin && currentPage && currentPage.slug !== 'team'"
       class="fixed right-6 bottom-6 z-30 flex items-center gap-2 rounded-full bg-primary-300 px-5 py-3 font-medium text-gray-900 shadow-lg transition-all hover:bg-primary-400 hover:shadow-xl active:scale-95"
       title="Add a new section to this page"
       @click="showAddModal = true"