feat: admin users can view all downloads with user badges

- Admin users (Emby IsAdministrator) see a 'Show all users' toggle
- When toggled, all tagged downloads are shown regardless of user
- Each download card shows the tagged user's name as a badge
- Non-admin users see only their own downloads (unchanged behavior)
- Backend accepts ?showAll=true query param (admin-only)

public/app.js

@@ -2,6 +2,8 @@ let currentUser = null;
 let downloads = [];
 let refreshInterval = null;
 let currentRefreshRate = 5000; // default 5 seconds
+let isAdmin = false;
+let showAll = false;
 
 // Apply saved theme immediately (before DOMContentLoaded to avoid flash)
 (function() {
@@ -17,6 +19,7 @@ document.addEventListener('DOMContentLoaded', () => {
   document.getElementById('login-form').addEventListener('submit', handleLogin);
   document.getElementById('logout-btn').addEventListener('click', handleLogout);
   document.getElementById('refresh-rate').addEventListener('change', handleRefreshRateChange);
+  document.getElementById('show-all-toggle').addEventListener('change', handleShowAllToggle);
 });
 
 function initThemeSwitcher() {
@@ -48,6 +51,11 @@ function handleRefreshRateChange(e) {
   startAutoRefresh();
 }
 
+function handleShowAllToggle(e) {
+  showAll = e.target.checked;
+  fetchUserDownloads(true);
+}
+
 function stopAutoRefresh() {
   if (refreshInterval) {
     clearInterval(refreshInterval);
@@ -62,6 +70,7 @@ async function checkAuthentication() {
     
     if (data.authenticated) {
       currentUser = data.user;
+      isAdmin = !!data.user.isAdmin;
       showDashboard();
       fetchUserDownloads(true);
       startAutoRefresh();
@@ -93,6 +102,7 @@ async function handleLogin(e) {
     
     if (data.success) {
       currentUser = data.user;
+      isAdmin = !!data.user.isAdmin;
       showDashboard();
       fetchUserDownloads(true);
       startAutoRefresh();
@@ -129,6 +139,7 @@ function showDashboard() {
   document.getElementById('login-container').style.display = 'none';
   document.getElementById('dashboard-container').style.display = 'block';
   document.getElementById('currentUser').textContent = currentUser.name || '-';
+  document.getElementById('admin-controls').style.display = isAdmin ? 'flex' : 'none';
 }
 
 function showLoginError(message) {
@@ -149,10 +160,12 @@ async function fetchUserDownloads(isInitialLoad = false) {
   hideError();
   
   try {
-    const response = await fetch('/api/dashboard/user-downloads');
+    const url = showAll ? '/api/dashboard/user-downloads?showAll=true' : '/api/dashboard/user-downloads';
+    const response = await fetch(url);
     const data = await response.json();
     
     currentUser = data.user;
+    isAdmin = !!data.isAdmin;
     downloads = data.downloads;
     
     // Debug: log first download to see what fields are present
@@ -348,6 +361,13 @@ function createDownloadCard(download) {
     movie.textContent = `Movie: ${download.movieName}`;
     infoDiv.appendChild(movie);
   }
+
+  if (showAll && download.userTag) {
+    const userBadge = document.createElement('span');
+    userBadge.className = 'download-user-badge';
+    userBadge.textContent = download.userTag;
+    header.appendChild(userBadge);
+  }
   
   const details = document.createElement('div');
   details.className = 'download-details';