Update panel: always show version status (up-to-date or update available)

Replace dismissable toast with persistent status row showing a green
dot + "Up to date" with commit hash, or amber dot + "Update available"
with an inline Install button. One or the other is always visible.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/css/panel.css

@@ -213,74 +213,72 @@
     color: var(--accent);
 }
 
-/* Update toast */
+/* Update status */
 .panel-updates {
     transition: all var(--transition-base);
 }
 
-.update-toast {
+.update-status {
-    position: relative;
-    padding: 12px;
-    background: var(--accent-dim);
-    border-left: 3px solid var(--accent);
-    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
-}
-
-.update-dismiss {
-    position: absolute;
-    top: 4px;
-    right: 4px;
-    width: 24px;
-    height: 24px;
-    background: none;
-    border: none;
-    color: var(--text-muted);
-    cursor: pointer;
-    font-size: 14px;
     display: flex;
     align-items: center;
-    justify-content: center;
+    gap: 10px;
-    border-radius: var(--radius-sm);
 }
 
-.update-dismiss:hover {
+.update-status-dot {
-    background: var(--accent-hover);
+    width: 8px;
-    color: var(--text-primary);
+    height: 8px;
+    border-radius: 50%;
+    flex-shrink: 0;
 }
 
-.update-toast-title {
+.update-status-dot.current {
+    background: var(--status-green);
+}
+
+.update-status-dot.available {
+    background: var(--status-amber);
+}
+
+.update-status-title {
     font-family: var(--font-ui);
-    font-size: 13px;
+    font-size: 12px;
     font-weight: 500;
-    color: var(--accent);
+    color: var(--text-primary);
-    margin-bottom: 4px;
+    line-height: 1.2;
 }
 
-.update-toast-info {
+.update-status-hash {
     font-family: var(--font-mono);
-    font-size: 11px;
+    font-size: 10px;
-    color: var(--text-secondary);
+    color: var(--text-muted);
-    margin-bottom: 10px;
+    line-height: 1.3;
 }
 
-.update-toast-btn {
+.update-status-text {
-    width: 100%;
+    flex: 1;
-    height: 30px;
+    min-width: 0;
+}
+
+.update-install-btn {
+    flex-shrink: 0;
+    height: 26px;
+    padding: 0 12px;
     background: var(--accent);
     border: none;
     border-radius: var(--radius-sm);
     color: #fff;
     font-family: var(--font-ui);
-    font-size: 12px;
+    font-size: 11px;
     font-weight: 500;
     cursor: pointer;
+    white-space: nowrap;
 }
 
-.update-toast-btn:hover {
+.update-install-btn:hover {
     opacity: 0.9;
 }
 
-.update-toast-btn:disabled {
+.update-install-btn:disabled {
     opacity: 0.6;
     cursor: not-allowed;
 }

frontend/js/atlus.js

@@ -391,42 +391,50 @@
     // =====================================================================
     // Panel — Update checker
     // =====================================================================
-    let updateDismissed = false;
 
     async function checkForUpdates() {
-        if (updateDismissed) return;
+        const panel = $('#panelUpdates');
+        if (!panel) return;
         try {
             const res = await Atlus.apiFetch('/api/updates/check');
             if (!res || !res.ok) return;
             const data = await res.json();
-            const panel = $('#panelUpdates');
+
-            if (!panel) return;
+            panel.classList.remove('hidden');
 
             if (data.available && data.behind_count > 0) {
-                showUpdateToast(panel, data);
+                showUpdateAvailable(panel, data);
             } else {
-                panel.classList.add('hidden');
+                showUpToDate(panel, data);
             }
         } catch (e) { /* ignore */ }
     }
 
-    function showUpdateToast(panel, data) {
+    function showUpToDate(panel, data) {
-        panel.classList.remove('hidden');
         panel.innerHTML = `
-            <div class="update-toast">
+            <div class="update-status update-current">
-                <button class="update-dismiss" title="Dismiss">&times;</button>
+                <span class="update-status-dot current"></span>
-                <div class="update-toast-title">Update available</div>
+                <div class="update-status-text">
-                <div class="update-toast-info">${data.behind_count} commit${data.behind_count !== 1 ? 's' : ''} behind (${data.remote_hash})</div>
+                    <div class="update-status-title">Up to date</div>
-                <button class="update-toast-btn">Install Update</button>
+                    <div class="update-status-hash">${data.local_hash}</div>
+                </div>
+            </div>
+        `;
+    }
+
+    function showUpdateAvailable(panel, data) {
+        panel.innerHTML = `
+            <div class="update-status update-available">
+                <span class="update-status-dot available"></span>
+                <div class="update-status-text">
+                    <div class="update-status-title">Update available</div>
+                    <div class="update-status-hash">${data.behind_count} commit${data.behind_count !== 1 ? 's' : ''} behind (${data.remote_hash})</div>
+                </div>
+                <button class="update-install-btn" title="Install update">Update</button>
             </div>
         `;
 
-        panel.querySelector('.update-dismiss').addEventListener('click', () => {
+        panel.querySelector('.update-install-btn').addEventListener('click', async (e) => {
-            panel.classList.add('hidden');
-            updateDismissed = true;
-        });
-
-        panel.querySelector('.update-toast-btn').addEventListener('click', async (e) => {
             const btn = e.target;
             btn.disabled = true;
             btn.textContent = 'Updating…';
@@ -435,10 +443,9 @@
                 const res = await Atlus.apiFetch('/api/updates/apply', { method: 'POST' });
                 if (res.ok) {
                     btn.textContent = 'Restarting…';
-                    // Server will restart — try to reload after a delay
                     setTimeout(() => attemptReload(0), 4000);
                 } else {
-                    btn.textContent = 'Update failed';
+                    btn.textContent = 'Failed';
                     btn.disabled = false;
                 }
             } catch (e) {