feat: add release notes overlay with Markdown rendering

- Replace truncated plaintext release notes with full-screen overlay
  rendered via `marked` library
- Server reconnection does a hard page reload instead of custom event

server/src/wled_controller/static/css/modal.css

@@ -448,6 +448,79 @@
     min-height: 0;
 }
 
+/* ── Release notes content ─────────────────────────────────── */
+
+.release-notes-content {
+    flex: 1;
+    overflow-y: auto;
+    padding: 1rem 1.5rem;
+    font-size: 0.9rem;
+    line-height: 1.6;
+    color: var(--text-color);
+    background: var(--bg-secondary);
+    border-radius: 8px;
+}
+
+.release-notes-content h2,
+.release-notes-content h3,
+.release-notes-content h4 {
+    margin: 1.2em 0 0.4em;
+    color: var(--text-color);
+}
+
+.release-notes-content h2 { font-size: 1.2rem; }
+.release-notes-content h3 { font-size: 1.05rem; }
+.release-notes-content h4 { font-size: 0.95rem; }
+
+.release-notes-content pre {
+    background: #0d0d0d;
+    color: #d4d4d4;
+    padding: 0.75rem 1rem;
+    border-radius: 6px;
+    overflow-x: auto;
+    font-size: 0.82rem;
+}
+
+.release-notes-content code {
+    background: var(--bg-tertiary, #2a2a2a);
+    padding: 0.15em 0.4em;
+    border-radius: 3px;
+    font-size: 0.88em;
+}
+
+.release-notes-content pre code {
+    background: none;
+    padding: 0;
+}
+
+.release-notes-content a {
+    color: var(--primary-color);
+}
+
+.release-notes-content hr {
+    border: none;
+    border-top: 1px solid var(--border-color);
+    margin: 1rem 0;
+}
+
+.release-notes-content table {
+    width: 100%;
+    border-collapse: collapse;
+    margin: 0.5rem 0;
+}
+
+.release-notes-content th,
+.release-notes-content td {
+    border: 1px solid var(--border-color);
+    padding: 0.4rem 0.6rem;
+    text-align: left;
+    font-size: 0.85rem;
+}
+
+.release-notes-content th {
+    background: var(--bg-tertiary, #2a2a2a);
+}
+
 /* ── Log viewer base ───────────────────────────────────────── */
 
 .log-viewer-output {

server/src/wled_controller/static/js/app.ts

@@ -203,6 +203,7 @@ import {
     loadUpdateStatus, initUpdateListener, checkForUpdates,
     loadUpdateSettings, saveUpdateSettings, dismissUpdate,
     initUpdateSettingsPanel, applyUpdate,
+    openReleaseNotes, closeReleaseNotes,
 } from './features/update.ts';
 
 // ─── Register all HTML onclick / onchange / onfocus globals ───
@@ -572,6 +573,8 @@ Object.assign(window, {
     dismissUpdate,
     initUpdateSettingsPanel,
     applyUpdate,
+    openReleaseNotes,
+    closeReleaseNotes,
 
     // appearance
     applyStylePreset,

server/src/wled_controller/static/js/core/api.ts

@@ -228,8 +228,9 @@ export async function loadServerInfo() {
         const wasOffline = _serverOnline === false;
         _setConnectionState(true);
         if (wasOffline) {
-            // Server came back — reload data
-            window.dispatchEvent(new CustomEvent('server:reconnected'));
+            // Server came back — hard reload to ensure fresh data
+            location.reload();
+            return;
         }
 
         // Auth mode detection

server/src/wled_controller/static/js/features/update.ts

@@ -36,6 +36,7 @@ interface UpdateStatus {
 }
 
 let _lastStatus: UpdateStatus | null = null;
+let _releaseNotesBody = '';
 
 // ─── Version badge highlight ────────────────────────────────
 
@@ -383,18 +384,33 @@ function _renderUpdatePanel(status: UpdateStatus): void {
         progressBar.parentElement!.style.display = show ? '' : 'none';
     }
 
-    // Release notes preview
-    const notesEl = document.getElementById('update-release-notes');
-    if (notesEl) {
+    // Release notes button visibility
+    const notesGroup = document.getElementById('update-release-notes-group');
+    if (notesGroup) {
         if (status.has_update && status.release && status.release.body) {
-            const truncated = status.release.body.length > 500
-                ? status.release.body.slice(0, 500) + '...'
-                : status.release.body;
-            notesEl.textContent = truncated;
-            notesEl.parentElement!.style.display = '';
+            _releaseNotesBody = status.release.body;
+            notesGroup.style.display = '';
         } else {
-            notesEl.textContent = '';
-            notesEl.parentElement!.style.display = 'none';
+            _releaseNotesBody = '';
+            notesGroup.style.display = 'none';
         }
     }
 }
+
+// ─── Release Notes Overlay ─────────────────────────────────
+
+export function openReleaseNotes(): void {
+    const overlay = document.getElementById('release-notes-overlay');
+    const content = document.getElementById('release-notes-content');
+    if (overlay && content) {
+        import('marked').then(({ marked }) => {
+            content.innerHTML = marked.parse(_releaseNotesBody) as string;
+            overlay.style.display = 'flex';
+        });
+    }
+}
+
+export function closeReleaseNotes(): void {
+    const overlay = document.getElementById('release-notes-overlay');
+    if (overlay) overlay.style.display = 'none';
+}

server/src/wled_controller/static/locales/en.json

@@ -1931,6 +1931,7 @@
     "update.last_check": "Last check",
     "update.never": "never",
     "update.release_notes": "Release Notes",
+    "update.view_release_notes": "View Release Notes",
     "update.auto_check_label": "Auto-Check Settings",
     "update.auto_check_hint": "Periodically check for new releases in the background.",
     "update.enable": "Enable auto-check",

server/src/wled_controller/static/locales/ru.json

@@ -1860,6 +1860,7 @@
     "update.last_check": "Последняя проверка",
     "update.never": "никогда",
     "update.release_notes": "Примечания к релизу",
+    "update.view_release_notes": "Открыть примечания к релизу",
     "update.auto_check_label": "Автоматическая проверка",
     "update.auto_check_hint": "Периодически проверять наличие новых версий в фоновом режиме.",
     "update.enable": "Включить автопроверку",

server/src/wled_controller/static/locales/zh.json

@@ -1858,6 +1858,7 @@
     "update.last_check": "上次检查",
     "update.never": "从未",
     "update.release_notes": "发布说明",
+    "update.view_release_notes": "查看发布说明",
     "update.auto_check_label": "自动检查设置",
     "update.auto_check_hint": "在后台定期检查新版本。",
     "update.enable": "启用自动检查",