Update connection badge UI and add last update timestamp

- Make connection badge compact with hover animation
- Show small icon (green/gray dot) that expands to show text on hover
- Add smooth 500ms transition animation
- Add last update timestamp to footer with static time display
- Format timestamp as 12-hour time (e.g., "2:34:05 PM")

frontend-modern/src/App.tsx

@@ -84,12 +84,27 @@ function App() {
   const [dataUpdated, setDataUpdated] = createSignal(false);
   let updateTimeout: number;
 
+  // Last update time formatting
+  const [lastUpdateText, setLastUpdateText] = createSignal('');
+
+  const formatLastUpdate = (timestamp: string) => {
+    if (!timestamp) return '';
+    const date = new Date(timestamp);
+    return date.toLocaleTimeString('en-US', {
+      hour: 'numeric',
+      minute: '2-digit',
+      second: '2-digit',
+      hour12: true
+    });
+  };
+
   // Flash indicator when data updates
   createEffect(() => {
     // Watch for state changes
     const updateTime = state().lastUpdate;
     if (updateTime && updateTime !== '') {
       setDataUpdated(true);
+      setLastUpdateText(formatLastUpdate(updateTime));
       window.clearTimeout(updateTimeout);
       updateTimeout = window.setTimeout(() => setDataUpdated(false), POLLING_INTERVALS.DATA_FLASH);
     }
@@ -478,6 +493,7 @@ function App() {
                         connected={connected}
                         reconnecting={reconnecting}
                         dataUpdated={dataUpdated}
+                        lastUpdateText={lastUpdateText}
                         versionInfo={versionInfo}
                         darkMode={darkMode}
                         toggleDarkMode={toggleDarkMode}
@@ -519,6 +535,7 @@ function AppLayout(props: {
   connected: () => boolean;
   reconnecting: () => boolean;
   dataUpdated: () => boolean;
+  lastUpdateText: () => string;
   versionInfo: () => VersionInfo | null;
   darkMode: () => boolean;
   toggleDarkMode: () => void;
@@ -623,16 +640,16 @@ function AppLayout(props: {
           </button>
           <div class="flex items-center gap-2">
             <div
-              class={`status text-xs px-2 py-1 rounded-full flex items-center gap-1 ${
+              class={`group status text-xs rounded-full flex items-center justify-center transition-all duration-500 ease-in-out px-1.5 ${
                 props.connected()
-                  ? 'connected bg-green-200 dark:bg-green-700 text-green-700 dark:text-green-300'
+                  ? 'connected bg-green-200 dark:bg-green-700 text-green-700 dark:text-green-300 min-w-6 h-6 group-hover:px-3'
                   : props.reconnecting()
-                    ? 'reconnecting bg-yellow-200 dark:bg-yellow-700 text-yellow-700 dark:text-yellow-300'
-                    : 'disconnected bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-300'
+                    ? 'reconnecting bg-yellow-200 dark:bg-yellow-700 text-yellow-700 dark:text-yellow-300 py-1'
+                    : 'disconnected bg-gray-200 dark:bg-gray-700 text-gray-700 dark:text-gray-300 min-w-6 h-6 group-hover:px-3'
               }`}
             >
               <Show when={props.reconnecting()}>
-                <svg class="animate-spin h-3 w-3" fill="none" viewBox="0 0 24 24">
+                <svg class="animate-spin h-3 w-3 flex-shrink-0" fill="none" viewBox="0 0 24 24">
                   <circle
                     class="opacity-25"
                     cx="12"
@@ -648,11 +665,19 @@ function AppLayout(props: {
                   ></path>
                 </svg>
               </Show>
-              {props.connected()
-                ? 'Connected'
-                : props.reconnecting()
-                  ? 'Reconnecting...'
-                  : 'Disconnected'}
+              <Show when={props.connected()}>
+                <span class="h-2.5 w-2.5 rounded-full bg-green-600 dark:bg-green-400 flex-shrink-0"></span>
+              </Show>
+              <Show when={!props.connected() && !props.reconnecting()}>
+                <span class="h-2.5 w-2.5 rounded-full bg-gray-600 dark:bg-gray-400 flex-shrink-0"></span>
+              </Show>
+              <span class={`whitespace-nowrap overflow-hidden transition-all duration-500 ${props.connected() || (!props.connected() && !props.reconnecting()) ? 'max-w-0 group-hover:max-w-[100px] group-hover:ml-2 group-hover:mr-1 opacity-0 group-hover:opacity-100' : 'max-w-[100px] ml-1 opacity-100'}`}>
+                {props.connected()
+                  ? 'Connected'
+                  : props.reconnecting()
+                    ? 'Reconnecting...'
+                    : 'Disconnected'}
+              </span>
             </div>
             <Show when={props.hasAuth() && !props.needsAuth()}>
               <Show when={props.proxyAuthInfo()?.username}>
@@ -843,6 +868,10 @@ function AppLayout(props: {
         </a>
         {props.versionInfo()?.isDevelopment && ' (Development)'}
         {props.versionInfo()?.isDocker && ' - Docker'}
+        <Show when={props.lastUpdateText()}>
+          <span class="mx-2">|</span>
+          <span>Last updated: {props.lastUpdateText()}</span>
+        </Show>
       </footer>
     </>
   );