Add screenshot page, add polling screenshots, better screenshot memory cleanup, better visualization/no jitter when screenshots are shown now.

Overlord-Server/public/assets/data.js

@@ -4,14 +4,12 @@ import { digestData } from "./utils.js";
 const POLL_INTERVAL_MS = 5000;
 const FALLBACK_POLL_MS = 30000;
 const PREF_REFRESH_KEY = "overlord_refresh_interval_seconds";
-const THUMBNAIL_COOLDOWN_MS = 60000;
 let pollTimer = null;
 let render = () => {};
 let dashboardWs = null;
 let dashboardWsConnected = false;
 let wsReconnectTimer = null;
 const manuallyDisconnecting = new Set();
-const thumbnailRequestedAt = new Map();
 
 function moveClientCardImmediately(msg) {
   const clientId = typeof msg?.clientId === "string" ? msg.clientId : "";
@@ -77,8 +75,6 @@ export async function loadWithOptions(options = {}) {
     render(data, { reorder });
     const pag = document.getElementById("pagination");
     if (pag) pag.style.visibility = "";
-    
-    requestThumbnailsForClients(data.items);
   } catch (err) {
     console.error("load clients", err);
   } finally {
@@ -93,19 +89,6 @@ export async function loadWithOptions(options = {}) {
   }
 }
 
-async function requestThumbnailsForClients(items) {
-  const now = Date.now();
-  const onlineClientsWithoutThumbnail = items.filter(c => {
-    if (!c.online || c.thumbnail) return false;
-    const last = thumbnailRequestedAt.get(c.id);
-    return !last || now - last > THUMBNAIL_COOLDOWN_MS;
-  });
-  for (const client of onlineClientsWithoutThumbnail) {
-    thumbnailRequestedAt.set(client.id, now);
-    await requestThumbnail(client.id);
-  }
-}
-
 function updateOsFilter(items) {
   const osSelect = document.getElementById("filter-os");
   if (!osSelect) return;
@@ -183,7 +166,6 @@ function connectDashboardWs() {
     console.warn("[dashboard] ws closed");
     dashboardWs = null;
     dashboardWsConnected = false;
-    thumbnailRequestedAt.clear();
     adjustPollingForWs();
     scheduleDashboardReconnect();
   };