Update media browser UI with fade-in animations and improvements

- Add fade-in animation for thumbnail loading to prevent layout shifts
- Add loading state indicators for thumbnails
- Improve media browser CSS styling
- Enhance JavaScript for smoother thumbnail loading experience

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

media_server/static/css/styles.css

@@ -854,6 +854,199 @@
             background: var(--error);
         }
 
+        /* Mini Player (Sticky) */
+        .mini-player {
+            position: fixed;
+            top: 0;
+            left: 0;
+            right: 0;
+            background: var(--bg-secondary);
+            border-bottom: 1px solid var(--border);
+            padding: 0.75rem 1rem;
+            display: flex;
+            align-items: center;
+            gap: 1.5rem;
+            z-index: 1000;
+            transform: translateY(0);
+            transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
+            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
+        }
+
+        .mini-player.hidden {
+            transform: translateY(-100%);
+            opacity: 0;
+            pointer-events: none;
+        }
+
+        .mini-player-info {
+            display: flex;
+            align-items: center;
+            gap: 0.75rem;
+            min-width: 200px;
+            flex-shrink: 0;
+        }
+
+        .mini-album-art {
+            width: 40px;
+            height: 40px;
+            border-radius: 4px;
+            object-fit: cover;
+            flex-shrink: 0;
+        }
+
+        .mini-track-details {
+            display: flex;
+            flex-direction: column;
+            min-width: 0;
+        }
+
+        .mini-track-title {
+            font-size: 0.875rem;
+            font-weight: 600;
+            color: var(--text-primary);
+            white-space: nowrap;
+            overflow: hidden;
+            text-overflow: ellipsis;
+        }
+
+        .mini-artist {
+            font-size: 0.75rem;
+            color: var(--text-secondary);
+            white-space: nowrap;
+            overflow: hidden;
+            text-overflow: ellipsis;
+        }
+
+        .mini-progress-container {
+            flex: 1;
+            display: flex;
+            align-items: center;
+            gap: 1rem;
+            min-width: 0;
+        }
+
+        .mini-time-display {
+            display: flex;
+            gap: 0.5rem;
+            font-size: 0.75rem;
+            color: var(--text-secondary);
+            flex-shrink: 0;
+        }
+
+        .mini-progress-bar {
+            flex: 1;
+            height: 4px;
+            background: var(--bg-tertiary);
+            border-radius: 2px;
+            cursor: pointer;
+            position: relative;
+            min-width: 100px;
+        }
+
+        .mini-progress-bar:hover {
+            height: 6px;
+        }
+
+        .mini-progress-fill {
+            height: 100%;
+            background: var(--accent);
+            border-radius: 2px;
+            width: 0%;
+            transition: width 0.1s linear;
+        }
+
+        .mini-controls {
+            display: flex;
+            align-items: center;
+            gap: 0.5rem;
+            flex-shrink: 0;
+        }
+
+        .mini-control-btn {
+            background: var(--bg-tertiary);
+            border: 1px solid var(--border);
+            border-radius: 50%;
+            width: 36px;
+            height: 36px;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+            cursor: pointer;
+            transition: all 0.2s;
+            padding: 0;
+        }
+
+        .mini-control-btn:hover {
+            background: var(--accent);
+            border-color: var(--accent);
+            transform: scale(1.05);
+        }
+
+        .mini-control-btn:disabled {
+            opacity: 0.5;
+            cursor: not-allowed;
+        }
+
+        .mini-control-btn svg {
+            width: 20px;
+            height: 20px;
+            fill: currentColor;
+        }
+
+        .mini-volume-container {
+            display: flex;
+            align-items: center;
+            gap: 0.75rem;
+            flex-shrink: 0;
+            min-width: 180px;
+        }
+
+        .mini-volume-slider {
+            flex: 1;
+            height: 4px;
+            -webkit-appearance: none;
+            appearance: none;
+            background: var(--bg-tertiary);
+            border-radius: 2px;
+            outline: none;
+            cursor: pointer;
+            min-width: 80px;
+        }
+
+        .mini-volume-slider::-webkit-slider-thumb {
+            -webkit-appearance: none;
+            appearance: none;
+            width: 12px;
+            height: 12px;
+            background: var(--accent);
+            border-radius: 50%;
+            cursor: pointer;
+        }
+
+        .mini-volume-slider::-moz-range-thumb {
+            width: 12px;
+            height: 12px;
+            background: var(--accent);
+            border-radius: 50%;
+            cursor: pointer;
+            border: none;
+        }
+
+        .mini-volume-slider:hover::-webkit-slider-thumb {
+            transform: scale(1.2);
+        }
+
+        .mini-volume-slider:hover::-moz-range-thumb {
+            transform: scale(1.2);
+        }
+
+        .mini-volume-display {
+            font-size: 0.75rem;
+            color: var(--text-secondary);
+            min-width: 36px;
+            text-align: right;
+        }
+
         /* SVG Icons */
         svg {
             width: 24px;

media_server/static/index.html

@@ -11,6 +11,42 @@
     <!-- Clear Token Button -->
     <button class="clear-token-btn" onclick="clearToken()" data-i18n-title="auth.logout.title" data-i18n="auth.logout" title="Clear saved token">Logout</button>
 
+    <!-- Mini Player (sticky) -->
+    <div class="mini-player hidden" id="mini-player">
+        <div class="mini-player-info">
+            <img id="mini-album-art" class="mini-album-art" src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300'%3E%3Crect fill='%23282828' width='300' height='300'/%3E%3Cpath fill='%236a6a6a' d='M150 80c-38.66 0-70 31.34-70 70s31.34 70 70 70 70-31.34 70-70-31.34-70-70-70zm0 20c27.614 0 50 22.386 50 50s-22.386 50-50 50-50-22.386-50-50 22.386-50 50-50zm0 30a20 20 0 100 40 20 20 0 000-40z'/%3E%3C/svg%3E" alt="Album Art">
+            <div class="mini-track-details">
+                <div id="mini-track-title" class="mini-track-title">No media playing</div>
+                <div id="mini-artist" class="mini-artist"></div>
+            </div>
+        </div>
+        <div class="mini-controls">
+            <button class="mini-control-btn" onclick="togglePlayPause()" id="mini-btn-play-pause" title="Play/Pause">
+                <svg viewBox="0 0 24 24" id="mini-play-pause-icon">
+                    <path d="M8 5v14l11-7z"/>
+                </svg>
+            </button>
+        </div>
+        <div class="mini-progress-container">
+            <div class="mini-time-display">
+                <span id="mini-current-time">0:00</span>
+                <span id="mini-total-time">0:00</span>
+            </div>
+            <div class="mini-progress-bar" id="mini-progress-bar">
+                <div class="mini-progress-fill" id="mini-progress-fill"></div>
+            </div>
+        </div>
+        <div class="mini-volume-container">
+            <button class="mini-control-btn" onclick="toggleMute()" id="mini-btn-mute" title="Mute">
+                <svg viewBox="0 0 24 24" id="mini-mute-icon">
+                    <path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3c0-1.77-1.02-3.29-2.5-4.03v8.05c1.48-.73 2.5-2.25 2.5-4.02z"/>
+                </svg>
+            </button>
+            <input type="range" id="mini-volume-slider" class="mini-volume-slider" min="0" max="100" value="50">
+            <div class="mini-volume-display" id="mini-volume-display">50%</div>
+        </div>
+    </div>
+
     <!-- Auth Modal -->
     <div id="auth-overlay" class="hidden">
         <div class="auth-modal">

media_server/static/js/app.js

@@ -240,6 +240,72 @@
                 setTimeout(() => { isUserAdjustingVolume = false; }, 500);
             });
 
+            // Mini Player: Intersection Observer to show/hide when main player scrolls out of view
+            const playerContainer = document.querySelector('.player-container');
+            const miniPlayer = document.getElementById('mini-player');
+
+            const observerOptions = {
+                root: null, // viewport
+                threshold: 0.1, // trigger when 10% visible
+                rootMargin: '0px'
+            };
+
+            const observerCallback = (entries) => {
+                entries.forEach(entry => {
+                    if (entry.isIntersecting) {
+                        // Main player is visible - hide mini player
+                        miniPlayer.classList.add('hidden');
+                    } else {
+                        // Main player is scrolled out of view - show mini player
+                        miniPlayer.classList.remove('hidden');
+                    }
+                });
+            };
+
+            const observer = new IntersectionObserver(observerCallback, observerOptions);
+            observer.observe(playerContainer);
+
+            // Mini player progress bar click to seek
+            const miniProgressBar = document.getElementById('mini-progress-bar');
+            miniProgressBar.addEventListener('click', (e) => {
+                const rect = miniProgressBar.getBoundingClientRect();
+                const percent = (e.clientX - rect.left) / rect.width;
+                const position = percent * currentDuration;
+                seek(position);
+            });
+
+            // Mini player volume slider
+            const miniVolumeSlider = document.getElementById('mini-volume-slider');
+            miniVolumeSlider.addEventListener('input', (e) => {
+                isUserAdjustingVolume = true;
+                const volume = parseInt(e.target.value);
+                document.getElementById('mini-volume-display').textContent = `${volume}%`;
+                document.getElementById('volume-display').textContent = `${volume}%`;
+                document.getElementById('volume-slider').value = volume;
+
+                // Throttle volume updates while dragging
+                if (volumeUpdateTimer) {
+                    clearTimeout(volumeUpdateTimer);
+                }
+                volumeUpdateTimer = setTimeout(() => {
+                    setVolume(volume);
+                    volumeUpdateTimer = null;
+                }, 50);
+            });
+
+            miniVolumeSlider.addEventListener('change', (e) => {
+                // Clear any pending throttled update
+                if (volumeUpdateTimer) {
+                    clearTimeout(volumeUpdateTimer);
+                    volumeUpdateTimer = null;
+                }
+
+                // Send final volume update immediately
+                const volume = parseInt(e.target.value);
+                setVolume(volume);
+                setTimeout(() => { isUserAdjustingVolume = false; }, 500);
+            });
+
             // Progress bar click to seek
             const progressBar = document.getElementById('progress-bar');
             progressBar.addEventListener('click', (e) => {
@@ -417,6 +483,10 @@
             document.getElementById('artist').textContent = status.artist || '';
             document.getElementById('album').textContent = status.album || '';
 
+            // Update mini player info
+            document.getElementById('mini-track-title').textContent = status.title || t('player.no_media');
+            document.getElementById('mini-artist').textContent = status.artist || '';
+
             // Update state
             const previousState = currentState;
             currentState = status.state;
@@ -424,12 +494,13 @@
 
             // Update album art
             const artImg = document.getElementById('album-art');
-            if (status.album_art_url) {
-                const token = localStorage.getItem('media_server_token');
-                artImg.src = `/api/media/artwork?token=${encodeURIComponent(token)}&_=${Date.now()}`;
-            } else {
-                artImg.src = "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300'%3E%3Crect fill='%23282828' width='300' height='300'/%3E%3Cpath fill='%236a6a6a' d='M150 80c-38.66 0-70 31.34-70 70s31.34 70 70 70 70-31.34 70-70-31.34-70-70-70zm0 20c27.614 0 50 22.386 50 50s-22.386 50-50 50-50-22.386-50-50 22.386-50 50-50zm0 30a20 20 0 100 40 20 20 0 000-40z'/%3E%3C/svg%3E";
-            }
+            const miniArtImg = document.getElementById('mini-album-art');
+            const artworkUrl = status.album_art_url
+                ? `/api/media/artwork?token=${encodeURIComponent(localStorage.getItem('media_server_token'))}&_=${Date.now()}`
+                : "data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300'%3E%3Crect fill='%23282828' width='300' height='300'/%3E%3Cpath fill='%236a6a6a' d='M150 80c-38.66 0-70 31.34-70 70s31.34 70 70 70 70-31.34 70-70-31.34-70-70-70zm0 20c27.614 0 50 22.386 50 50s-22.386 50-50 50-50-22.386-50-50 22.386-50 50-50zm0 30a20 20 0 100 40 20 20 0 000-40z'/%3E%3C/svg%3E";
+
+            artImg.src = artworkUrl;
+            miniArtImg.src = artworkUrl;
 
             // Update progress
             if (status.duration && status.position !== null) {
@@ -447,6 +518,8 @@
             if (!isUserAdjustingVolume) {
                 document.getElementById('volume-slider').value = status.volume;
                 document.getElementById('volume-display').textContent = `${status.volume}%`;
+                document.getElementById('mini-volume-slider').value = status.volume;
+                document.getElementById('mini-volume-display').textContent = `${status.volume}%`;
             }
 
             // Update mute state
@@ -460,6 +533,7 @@
             document.getElementById('btn-play-pause').disabled = !hasMedia;
             document.getElementById('btn-next').disabled = !hasMedia;
             document.getElementById('btn-previous').disabled = !hasMedia;
+            document.getElementById('mini-btn-play-pause').disabled = !hasMedia;
 
             // Start/stop position interpolation based on playback state
             if (status.state === 'playing' && previousState !== 'playing') {
@@ -473,27 +547,32 @@
             const stateText = document.getElementById('playback-state');
             const stateIcon = document.getElementById('state-icon');
             const playPauseIcon = document.getElementById('play-pause-icon');
+            const miniPlayPauseIcon = document.getElementById('mini-play-pause-icon');
 
             switch(state) {
                 case 'playing':
                     stateText.textContent = t('state.playing');
                     stateIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
                     playPauseIcon.innerHTML = '<path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z"/>';
+                    miniPlayPauseIcon.innerHTML = '<path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z"/>';
                     break;
                 case 'paused':
                     stateText.textContent = t('state.paused');
                     stateIcon.innerHTML = '<path d="M6 19h4V5H6v14zm8-14v14h4V5h-4z"/>';
                     playPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
+                    miniPlayPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
                     break;
                 case 'stopped':
                     stateText.textContent = t('state.stopped');
                     stateIcon.innerHTML = '<path d="M6 6h12v12H6z"/>';
                     playPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
+                    miniPlayPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
                     break;
                 default:
                     stateText.textContent = t('state.idle');
                     stateIcon.innerHTML = '<path d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 14.5v-9l6 4.5-6 4.5z"/>';
                     playPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
+                    miniPlayPauseIcon.innerHTML = '<path d="M8 5v14l11-7z"/>';
             }
         }
 
@@ -503,6 +582,11 @@
             document.getElementById('current-time').textContent = formatTime(position);
             document.getElementById('total-time').textContent = formatTime(duration);
             document.getElementById('progress-bar').dataset.duration = duration;
+
+            // Update mini player progress
+            document.getElementById('mini-progress-fill').style.width = `${percent}%`;
+            document.getElementById('mini-current-time').textContent = formatTime(position);
+            document.getElementById('mini-total-time').textContent = formatTime(duration);
         }
 
         function startPositionInterpolation() {
@@ -533,10 +617,16 @@
 
         function updateMuteIcon(muted) {
             const muteIcon = document.getElementById('mute-icon');
+            const miniMuteIcon = document.getElementById('mini-mute-icon');
+            const mutedPath = '<path d="M16.5 12c0-1.77-1.02-3.29-2.5-4.03v2.21l2.45 2.45c.03-.2.05-.41.05-.63zm2.5 0c0 .94-.2 1.82-.54 2.64l1.51 1.51C20.63 14.91 21 13.5 21 12c0-4.28-2.99-7.86-7-8.77v2.06c2.89.86 5 3.54 5 6.71zM4.27 3L3 4.27 7.73 9H3v6h4l5 5v-6.73l4.25 4.25c-.67.52-1.42.93-2.25 1.18v2.06c1.38-.31 2.63-.95 3.69-1.81L19.73 21 21 19.73l-9-9L4.27 3zM12 4L9.91 6.09 12 8.18V4z"/>';
+            const unmutedPath = '<path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3c0-1.77-1.02-3.29-2.5-4.03v8.05c1.48-.73 2.5-2.25 2.5-4.02z"/>';
+
             if (muted) {
-                muteIcon.innerHTML = '<path d="M16.5 12c0-1.77-1.02-3.29-2.5-4.03v2.21l2.45 2.45c.03-.2.05-.41.05-.63zm2.5 0c0 .94-.2 1.82-.54 2.64l1.51 1.51C20.63 14.91 21 13.5 21 12c0-4.28-2.99-7.86-7-8.77v2.06c2.89.86 5 3.54 5 6.71zM4.27 3L3 4.27 7.73 9H3v6h4l5 5v-6.73l4.25 4.25c-.67.52-1.42.93-2.25 1.18v2.06c1.38-.31 2.63-.95 3.69-1.81L19.73 21 21 19.73l-9-9L4.27 3zM12 4L9.91 6.09 12 8.18V4z"/>';
+                muteIcon.innerHTML = mutedPath;
+                miniMuteIcon.innerHTML = mutedPath;
             } else {
-                muteIcon.innerHTML = '<path d="M3 9v6h4l5 5V4L7 9H3zm13.5 3c0-1.77-1.02-3.29-2.5-4.03v8.05c1.48-.73 2.5-2.25 2.5-4.02z"/>';
+                muteIcon.innerHTML = unmutedPath;
+                miniMuteIcon.innerHTML = unmutedPath;
             }
         }