Improve stream UI: grouped sections, full-size preview lightbox, and test redesign

- Separate Screen Capture and Processed streams into grouped sections with headers
- Remove redundant Type dropdown from stream modal (type inferred from add button)
- Add full-resolution image to test endpoints alongside thumbnails
- Add image lightbox with clickable preview for full-size viewing
- Move test results from modal into lightbox overlay with capture stats
- Apply postprocessing to both thumbnail and full image for processed streams
- Rename "Assigned Picture Stream" to "Picture Stream" in device settings
- Fix null reference errors from removed test result HTML elements

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

server/src/wled_controller/api/routes.py

@@ -1052,12 +1052,19 @@ async def test_template(
         thumbnail = pil_image.copy()
         thumbnail.thumbnail((thumbnail_width, thumbnail_height), Image.Resampling.LANCZOS)
 
-        # Encode full capture thumbnail as JPEG
+        # Encode thumbnail as JPEG
         img_buffer = io.BytesIO()
         thumbnail.save(img_buffer, format='JPEG', quality=85)
         img_buffer.seek(0)
-        full_capture_b64 = base64.b64encode(img_buffer.getvalue()).decode('utf-8')
-        full_capture_data_uri = f"data:image/jpeg;base64,{full_capture_b64}"
+        thumbnail_b64 = base64.b64encode(img_buffer.getvalue()).decode('utf-8')
+        thumbnail_data_uri = f"data:image/jpeg;base64,{thumbnail_b64}"
+
+        # Encode full-resolution image as JPEG
+        full_buffer = io.BytesIO()
+        pil_image.save(full_buffer, format='JPEG', quality=90)
+        full_buffer.seek(0)
+        full_b64 = base64.b64encode(full_buffer.getvalue()).decode('utf-8')
+        full_data_uri = f"data:image/jpeg;base64,{full_b64}"
 
         # Calculate metrics
         actual_fps = frame_count / actual_duration if actual_duration > 0 else 0
@@ -1067,7 +1074,8 @@ async def test_template(
 
         return TemplateTestResponse(
             full_capture=CaptureImage(
-                image=full_capture_data_uri,
+                image=thumbnail_data_uri,
+                full_image=full_data_uri,
                 width=width,
                 height=height,
                 thumbnail_width=thumbnail_width,
@@ -1469,34 +1477,41 @@ async def test_picture_stream(
         thumbnail = pil_image.copy()
         thumbnail.thumbnail((thumbnail_width, thumbnail_height), Image.Resampling.LANCZOS)
 
-        # Apply postprocessing to preview if this is a processed stream
+        # Apply postprocessing if this is a processed stream
         pp_template_ids = chain["postprocessing_template_ids"]
         if pp_template_ids:
             try:
                 pp = pp_store.get_template(pp_template_ids[0])
-                img_array = np.array(thumbnail, dtype=np.float32) / 255.0
 
-                if pp.brightness != 1.0:
-                    img_array *= pp.brightness
+                def apply_pp(img):
+                    arr = np.array(img, dtype=np.float32) / 255.0
+                    if pp.brightness != 1.0:
+                        arr *= pp.brightness
+                    if pp.saturation != 1.0:
+                        lum = np.dot(arr[..., :3], [0.299, 0.587, 0.114])[..., np.newaxis]
+                        arr[..., :3] = lum + (arr[..., :3] - lum) * pp.saturation
+                    if pp.gamma != 1.0:
+                        arr = np.power(np.clip(arr, 0, 1), 1.0 / pp.gamma)
+                    return Image.fromarray(np.clip(arr * 255.0, 0, 255).astype(np.uint8))
 
-                if pp.saturation != 1.0:
-                    luminance = np.dot(img_array[..., :3], [0.299, 0.587, 0.114])
-                    luminance = luminance[..., np.newaxis]
-                    img_array[..., :3] = luminance + (img_array[..., :3] - luminance) * pp.saturation
-
-                if pp.gamma != 1.0:
-                    img_array = np.power(np.clip(img_array, 0, 1), 1.0 / pp.gamma)
-
-                img_array = np.clip(img_array * 255.0, 0, 255).astype(np.uint8)
-                thumbnail = Image.fromarray(img_array)
+                thumbnail = apply_pp(thumbnail)
+                pil_image = apply_pp(pil_image)
             except ValueError:
                 logger.warning(f"PP template {pp_template_ids[0]} not found, skipping postprocessing preview")
 
+        # Encode thumbnail
         img_buffer = io.BytesIO()
         thumbnail.save(img_buffer, format='JPEG', quality=85)
         img_buffer.seek(0)
-        full_capture_b64 = base64.b64encode(img_buffer.getvalue()).decode('utf-8')
-        full_capture_data_uri = f"data:image/jpeg;base64,{full_capture_b64}"
+        thumbnail_b64 = base64.b64encode(img_buffer.getvalue()).decode('utf-8')
+        thumbnail_data_uri = f"data:image/jpeg;base64,{thumbnail_b64}"
+
+        # Encode full-resolution image
+        full_buffer = io.BytesIO()
+        pil_image.save(full_buffer, format='JPEG', quality=90)
+        full_buffer.seek(0)
+        full_b64 = base64.b64encode(full_buffer.getvalue()).decode('utf-8')
+        full_data_uri = f"data:image/jpeg;base64,{full_b64}"
 
         actual_fps = frame_count / actual_duration if actual_duration > 0 else 0
         avg_capture_time_ms = (total_capture_time / frame_count * 1000) if frame_count > 0 else 0
@@ -1504,7 +1519,8 @@ async def test_picture_stream(
 
         return TemplateTestResponse(
             full_capture=CaptureImage(
-                image=full_capture_data_uri,
+                image=thumbnail_data_uri,
+                full_image=full_data_uri,
                 width=width,
                 height=height,
                 thumbnail_width=thumbnail_width,

server/src/wled_controller/api/schemas.py

@@ -292,9 +292,10 @@ class TemplateTestRequest(BaseModel):
 class CaptureImage(BaseModel):
     """Captured image with metadata."""
 
-    image: str = Field(description="Base64-encoded image data")
-    width: int = Field(description="Image width in pixels")
-    height: int = Field(description="Image height in pixels")
+    image: str = Field(description="Base64-encoded thumbnail image data")
+    full_image: Optional[str] = Field(None, description="Base64-encoded full-resolution image data")
+    width: int = Field(description="Original image width in pixels")
+    height: int = Field(description="Original image height in pixels")
     thumbnail_width: Optional[int] = Field(None, description="Thumbnail width (if resized)")
     thumbnail_height: Optional[int] = Field(None, description="Thumbnail height (if resized)")
 

server/src/wled_controller/static/app.js

@@ -30,6 +30,37 @@ function unlockBody() {
     document.body.style.paddingRight = '';
 }
 
+// Image lightbox
+function openLightbox(imageSrc, statsHtml) {
+    const lightbox = document.getElementById('image-lightbox');
+    const img = document.getElementById('lightbox-image');
+    const statsEl = document.getElementById('lightbox-stats');
+    img.src = imageSrc;
+    if (statsHtml) {
+        statsEl.innerHTML = statsHtml;
+        statsEl.style.display = '';
+    } else {
+        statsEl.style.display = 'none';
+    }
+    lightbox.classList.add('active');
+    lockBody();
+}
+
+function closeLightbox(event) {
+    if (event && event.target && event.target.closest('.lightbox-content')) return;
+    const lightbox = document.getElementById('image-lightbox');
+    lightbox.classList.remove('active');
+    document.getElementById('lightbox-image').src = '';
+    document.getElementById('lightbox-stats').style.display = 'none';
+    unlockBody();
+}
+
+document.addEventListener('keydown', (e) => {
+    if (e.key === 'Escape' && document.getElementById('image-lightbox').classList.contains('active')) {
+        closeLightbox();
+    }
+});
+
 // Locale management
 let currentLocale = 'en';
 let translations = {};
@@ -2638,9 +2669,6 @@ async function showTestTemplateModal(templateId) {
     // Restore last used capture duration
     restoreCaptureDuration();
 
-    // Reset results
-    document.getElementById('test-template-results').style.display = 'none';
-
     // Show modal
     const modal = document.getElementById('test-template-modal');
     modal.style.display = 'flex';
@@ -2836,7 +2864,6 @@ async function runTemplateTest() {
     }
 
     const template = window.currentTestingTemplate;
-    const resultsDiv = document.getElementById('test-template-results');
 
     // Show full-page overlay spinner with progress
     showOverlaySpinner(t('templates.test.running'), captureDuration);
@@ -2869,25 +2896,23 @@ async function runTemplateTest() {
     }
 }
 
-// Display test results
+function buildTestStatsHtml(result) {
+    const p = result.performance;
+    const res = `${result.full_capture.width}x${result.full_capture.height}`;
+    return `
+        <div class="stat-item"><span>${t('templates.test.results.duration')}:</span> <strong>${p.capture_duration_s.toFixed(2)}s</strong></div>
+        <div class="stat-item"><span>${t('templates.test.results.frame_count')}:</span> <strong>${p.frame_count}</strong></div>
+        <div class="stat-item"><span>${t('templates.test.results.actual_fps')}:</span> <strong>${p.actual_fps.toFixed(1)}</strong></div>
+        <div class="stat-item"><span>${t('templates.test.results.avg_capture_time')}:</span> <strong>${p.avg_capture_time_ms.toFixed(1)}ms</strong></div>
+        <div class="stat-item"><span>Resolution:</span> <strong>${res}</strong></div>
+    `;
+}
+
+// Display test results — opens lightbox with stats overlay
 function displayTestResults(result) {
-    const resultsDiv = document.getElementById('test-template-results');
-
-    // Hide overlay spinner
     hideOverlaySpinner();
-
-    // Full capture preview
-    const previewImg = document.getElementById('test-template-preview-image');
-    previewImg.innerHTML = `<img src="${result.full_capture.image}" alt="Capture preview" style="max-width: 100%; border-radius: 4px;">`;
-
-    // Performance stats
-    document.getElementById('test-template-actual-duration').textContent = `${result.performance.capture_duration_s.toFixed(2)}s`;
-    document.getElementById('test-template-frame-count').textContent = result.performance.frame_count;
-    document.getElementById('test-template-actual-fps').textContent = `${result.performance.actual_fps.toFixed(1)} FPS`;
-    document.getElementById('test-template-avg-capture-time').textContent = `${result.performance.avg_capture_time_ms.toFixed(1)}ms`;
-
-    // Show results
-    resultsDiv.style.display = 'block';
+    const fullImageSrc = result.full_capture.full_image || result.full_capture.image;
+    openLightbox(fullImageSrc, buildTestStatsHtml(result));
 }
 
 // Save template
@@ -2989,9 +3014,32 @@ function renderPictureStreamsList(streams) {
     const container = document.getElementById('streams-list');
 
     if (streams.length === 0) {
-        container.innerHTML = `<div class="template-card add-template-card" onclick="showAddStreamModal()">
-            <div class="add-template-icon">+</div>
-            <div class="add-template-label">${t('streams.add')}</div>
+        container.innerHTML = `
+        <div class="stream-group">
+            <div class="stream-group-header">
+                <span class="stream-group-icon">📷</span>
+                <span class="stream-group-title">${t('streams.group.raw')}</span>
+                <span class="stream-group-count">0</span>
+            </div>
+            <div class="templates-grid">
+                <div class="template-card add-template-card" onclick="showAddStreamModal('raw')">
+                    <div class="add-template-icon">+</div>
+                    <div class="add-template-label">${t('streams.add.raw')}</div>
+                </div>
+            </div>
+        </div>
+        <div class="stream-group">
+            <div class="stream-group-header">
+                <span class="stream-group-icon">🎨</span>
+                <span class="stream-group-title">${t('streams.group.processed')}</span>
+                <span class="stream-group-count">0</span>
+            </div>
+            <div class="templates-grid">
+                <div class="template-card add-template-card" onclick="showAddStreamModal('processed')">
+                    <div class="add-template-icon">+</div>
+                    <div class="add-template-label">${t('streams.add.processed')}</div>
+                </div>
+            </div>
         </div>`;
         return;
     }
@@ -3046,10 +3094,41 @@ function renderPictureStreamsList(streams) {
         `;
     };
 
-    let html = streams.map(renderCard).join('');
-    html += `<div class="template-card add-template-card" onclick="showAddStreamModal()">
-        <div class="add-template-icon">+</div>
-        <div class="add-template-label">${t('streams.add')}</div>
+    const rawStreams = streams.filter(s => s.stream_type === 'raw');
+    const processedStreams = streams.filter(s => s.stream_type === 'processed');
+
+    let html = '';
+
+    // Screen Capture streams section
+    html += `<div class="stream-group">
+        <div class="stream-group-header">
+            <span class="stream-group-icon">📷</span>
+            <span class="stream-group-title">${t('streams.group.raw')}</span>
+            <span class="stream-group-count">${rawStreams.length}</span>
+        </div>
+        <div class="templates-grid">
+            ${rawStreams.map(renderCard).join('')}
+            <div class="template-card add-template-card" onclick="showAddStreamModal('raw')">
+                <div class="add-template-icon">+</div>
+                <div class="add-template-label">${t('streams.add.raw')}</div>
+            </div>
+        </div>
+    </div>`;
+
+    // Processed streams section
+    html += `<div class="stream-group">
+        <div class="stream-group-header">
+            <span class="stream-group-icon">🎨</span>
+            <span class="stream-group-title">${t('streams.group.processed')}</span>
+            <span class="stream-group-count">${processedStreams.length}</span>
+        </div>
+        <div class="templates-grid">
+            ${processedStreams.map(renderCard).join('')}
+            <div class="template-card add-template-card" onclick="showAddStreamModal('processed')">
+                <div class="add-template-icon">+</div>
+                <div class="add-template-label">${t('streams.add.processed')}</div>
+            </div>
+        </div>
     </div>`;
 
     container.innerHTML = html;
@@ -3061,15 +3140,14 @@ function onStreamTypeChange() {
     document.getElementById('stream-processed-fields').style.display = streamType === 'processed' ? '' : 'none';
 }
 
-async function showAddStreamModal() {
-    document.getElementById('stream-modal-title').textContent = t('streams.add');
+async function showAddStreamModal(presetType) {
+    const streamType = presetType || 'raw';
+    const titleKey = streamType === 'raw' ? 'streams.add.raw' : 'streams.add.processed';
+    document.getElementById('stream-modal-title').textContent = t(titleKey);
     document.getElementById('stream-form').reset();
     document.getElementById('stream-id').value = '';
     document.getElementById('stream-error').style.display = 'none';
-    document.getElementById('stream-type').disabled = false;
-
-    // Reset to raw type
-    document.getElementById('stream-type').value = 'raw';
+    document.getElementById('stream-type').value = streamType;
     onStreamTypeChange();
 
     // Populate dropdowns
@@ -3087,15 +3165,15 @@ async function editStream(streamId) {
         if (!response.ok) throw new Error(`Failed to load stream: ${response.status}`);
         const stream = await response.json();
 
-        document.getElementById('stream-modal-title').textContent = t('streams.edit');
+        const editTitleKey = stream.stream_type === 'raw' ? 'streams.edit.raw' : 'streams.edit.processed';
+        document.getElementById('stream-modal-title').textContent = t(editTitleKey);
         document.getElementById('stream-id').value = streamId;
         document.getElementById('stream-name').value = stream.name;
         document.getElementById('stream-description').value = stream.description || '';
         document.getElementById('stream-error').style.display = 'none';
 
-        // Set type and disable changing it for existing streams
+        // Set type (hidden input)
         document.getElementById('stream-type').value = stream.stream_type;
-        document.getElementById('stream-type').disabled = true;
         onStreamTypeChange();
 
         // Populate dropdowns before setting values
@@ -3286,7 +3364,6 @@ let _currentTestStreamId = null;
 async function showTestStreamModal(streamId) {
     _currentTestStreamId = streamId;
     restoreStreamTestDuration();
-    document.getElementById('test-stream-results').style.display = 'none';
 
     const modal = document.getElementById('test-stream-modal');
     modal.style.display = 'flex';
@@ -3340,16 +3417,8 @@ async function runStreamTest() {
 
 function displayStreamTestResults(result) {
     hideOverlaySpinner();
-
-    const previewImg = document.getElementById('test-stream-preview-image');
-    previewImg.innerHTML = `<img src="${result.full_capture.image}" alt="Stream preview" style="max-width: 100%; border-radius: 4px;">`;
-
-    document.getElementById('test-stream-actual-duration').textContent = `${result.performance.capture_duration_s.toFixed(2)}s`;
-    document.getElementById('test-stream-frame-count').textContent = result.performance.frame_count;
-    document.getElementById('test-stream-actual-fps').textContent = `${result.performance.actual_fps.toFixed(1)} FPS`;
-    document.getElementById('test-stream-avg-capture-time').textContent = `${result.performance.avg_capture_time_ms.toFixed(1)}ms`;
-
-    document.getElementById('test-stream-results').style.display = 'block';
+    const fullImageSrc = result.full_capture.full_image || result.full_capture.image;
+    openLightbox(fullImageSrc, buildTestStatsHtml(result));
 }
 
 // ===== Processing Templates =====

server/src/wled_controller/static/index.html

@@ -70,7 +70,7 @@
                         Picture streams define the capture pipeline. A raw stream captures from a display using a capture template. A processed stream applies postprocessing to another stream. Assign streams to devices.
                     </span>
                 </p>
-                <div id="streams-list" class="templates-grid">
+                <div id="streams-list">
                     <div class="loading-spinner"></div>
                 </div>
             </div>
@@ -460,34 +460,6 @@
                     <span data-i18n="templates.test.run">🧪 Run Test</span>
                 </button>
 
-                <div id="test-template-results" style="display: none; margin-top: 16px;">
-                    <div class="test-results-container">
-                        <div class="test-preview-section">
-                            <div id="test-template-preview-image" class="test-preview-image"></div>
-                        </div>
-
-                        <div class="test-performance-section">
-                            <div class="test-performance-stats">
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.duration">Duration:</span>
-                                    <strong id="test-template-actual-duration">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.frame_count">Frames:</span>
-                                    <strong id="test-template-frame-count">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.actual_fps">Actual FPS:</span>
-                                    <strong id="test-template-actual-fps">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.avg_capture_time">Avg Capture:</span>
-                                    <strong id="test-template-avg-capture-time">-</strong>
-                                </div>
-                            </div>
-                        </div>
-                    </div>
-                </div>
             </div>
         </div>
     </div>
@@ -512,34 +484,6 @@
                     <span data-i18n="streams.test.run">🧪 Run Test</span>
                 </button>
 
-                <div id="test-stream-results" style="display: none; margin-top: 16px;">
-                    <div class="test-results-container">
-                        <div class="test-preview-section">
-                            <div id="test-stream-preview-image" class="test-preview-image"></div>
-                        </div>
-
-                        <div class="test-performance-section">
-                            <div class="test-performance-stats">
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.duration">Duration:</span>
-                                    <strong id="test-stream-actual-duration">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.frame_count">Frames:</span>
-                                    <strong id="test-stream-frame-count">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.actual_fps">Actual FPS:</span>
-                                    <strong id="test-stream-actual-fps">-</strong>
-                                </div>
-                                <div class="stat-item">
-                                    <span data-i18n="templates.test.results.avg_capture_time">Avg Capture:</span>
-                                    <strong id="test-stream-avg-capture-time">-</strong>
-                                </div>
-                            </div>
-                        </div>
-                    </div>
-                </div>
             </div>
         </div>
     </div>
@@ -559,13 +503,7 @@
                         <input type="text" id="stream-name" data-i18n-placeholder="streams.name.placeholder" placeholder="My Stream" required>
                     </div>
 
-                    <div class="form-group">
-                        <label for="stream-type" data-i18n="streams.type">Stream Type:</label>
-                        <select id="stream-type" onchange="onStreamTypeChange()">
-                            <option value="raw" data-i18n="streams.type.raw">Screen Capture</option>
-                            <option value="processed" data-i18n="streams.type.processed">Processed</option>
-                        </select>
-                    </div>
+                    <input type="hidden" id="stream-type" value="raw">
 
                     <!-- Raw stream fields -->
                     <div id="stream-raw-fields">
@@ -692,6 +630,15 @@
         </div>
     </div>
 
+    <!-- Image Lightbox -->
+    <div id="image-lightbox" class="lightbox" onclick="closeLightbox(event)">
+        <button class="lightbox-close" onclick="closeLightbox()" title="Close">&#x2715;</button>
+        <div class="lightbox-content">
+            <img id="lightbox-image" src="" alt="Full size preview">
+            <div id="lightbox-stats" class="lightbox-stats" style="display: none;"></div>
+        </div>
+    </div>
+
     <script src="/static/app.js"></script>
     <script>
         // Initialize theme

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

@@ -197,8 +197,14 @@
   "common.edit": "Edit",
   "streams.title": "\uD83D\uDCFA Picture Streams",
   "streams.description": "Picture streams define the capture pipeline. A raw stream captures from a display using a capture template. A processed stream applies postprocessing to another stream. Assign streams to devices.",
+  "streams.group.raw": "Screen Capture Streams",
+  "streams.group.processed": "Processed Streams",
   "streams.add": "Add Picture Stream",
+  "streams.add.raw": "Add Screen Capture",
+  "streams.add.processed": "Add Processed Stream",
   "streams.edit": "Edit Picture Stream",
+  "streams.edit.raw": "Edit Screen Capture",
+  "streams.edit.processed": "Edit Processed Stream",
   "streams.name": "Stream Name:",
   "streams.name.placeholder": "My Stream",
   "streams.type": "Type:",
@@ -245,7 +251,7 @@
   "postprocessing.config.show": "Show settings",
   "device.button.stream_selector": "Stream Settings",
   "device.stream_settings.title": "📺 Stream Settings",
-  "device.stream_selector.label": "Assigned Picture Stream:",
+  "device.stream_selector.label": "Picture Stream:",
   "device.stream_selector.hint": "Select a picture stream that defines what this device captures and processes",
   "device.stream_selector.none": "-- No stream assigned --",
   "device.stream_selector.saved": "Stream settings updated",

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

@@ -197,8 +197,14 @@
   "common.edit": "Редактировать",
   "streams.title": "\uD83D\uDCFA Видеопотоки",
   "streams.description": "Видеопотоки определяют конвейер захвата. Сырой поток захватывает экран с помощью шаблона захвата. Обработанный поток применяет постобработку к другому потоку. Назначайте потоки устройствам.",
+  "streams.group.raw": "Потоки Захвата Экрана",
+  "streams.group.processed": "Обработанные Потоки",
   "streams.add": "Добавить Видеопоток",
+  "streams.add.raw": "Добавить Захват Экрана",
+  "streams.add.processed": "Добавить Обработанный",
   "streams.edit": "Редактировать Видеопоток",
+  "streams.edit.raw": "Редактировать Захват Экрана",
+  "streams.edit.processed": "Редактировать Обработанный Поток",
   "streams.name": "Имя Потока:",
   "streams.name.placeholder": "Мой Поток",
   "streams.type": "Тип:",
@@ -245,7 +251,7 @@
   "postprocessing.config.show": "Показать настройки",
   "device.button.stream_selector": "Настройки потока",
   "device.stream_settings.title": "📺 Настройки потока",
-  "device.stream_selector.label": "Назначенный Видеопоток:",
+  "device.stream_selector.label": "Видеопоток:",
   "device.stream_selector.hint": "Выберите видеопоток, определяющий что это устройство захватывает и обрабатывает",
   "device.stream_selector.none": "-- Поток не назначен --",
   "device.stream_selector.saved": "Настройки потока обновлены",

server/src/wled_controller/static/style.css

@@ -2045,6 +2045,131 @@ input:-webkit-autofill:focus {
     margin-right: 6px;
 }
 
+/* Stream group sections */
+.stream-group {
+    margin-bottom: 24px;
+}
+
+.stream-group:last-child {
+    margin-bottom: 0;
+}
+
+.stream-group-header {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin-bottom: 12px;
+    padding-bottom: 8px;
+    border-bottom: 2px solid var(--border-color);
+}
+
+.stream-group-icon {
+    font-size: 1.2rem;
+}
+
+.stream-group-title {
+    font-size: 1rem;
+    font-weight: 600;
+    color: var(--text-color);
+}
+
+.stream-group-count {
+    background: var(--border-color);
+    color: var(--text-secondary);
+    font-size: 0.75rem;
+    font-weight: 600;
+    padding: 2px 8px;
+    border-radius: 10px;
+    min-width: 20px;
+    text-align: center;
+}
+
+/* Image Lightbox */
+.lightbox {
+    display: none;
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background: rgba(0, 0, 0, 0.92);
+    z-index: 10000;
+    justify-content: center;
+    align-items: center;
+    cursor: zoom-out;
+}
+
+.lightbox.active {
+    display: flex;
+}
+
+.lightbox-content {
+    position: relative;
+    max-width: 95%;
+    max-height: 95%;
+    cursor: default;
+}
+
+.lightbox-content img {
+    max-width: 100%;
+    max-height: 90vh;
+    object-fit: contain;
+    border-radius: 4px;
+    display: block;
+}
+
+.lightbox-close {
+    position: absolute;
+    top: 16px;
+    right: 16px;
+    background: rgba(255, 255, 255, 0.15);
+    border: none;
+    color: white;
+    font-size: 1.5rem;
+    width: 40px;
+    height: 40px;
+    border-radius: 50%;
+    cursor: pointer;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: background 0.2s;
+    z-index: 1;
+}
+
+.lightbox-close:hover {
+    background: rgba(255, 255, 255, 0.3);
+}
+
+.lightbox-stats {
+    position: absolute;
+    bottom: 8px;
+    left: 8px;
+    background: rgba(0, 0, 0, 0.7);
+    backdrop-filter: blur(8px);
+    color: white;
+    padding: 8px 14px;
+    border-radius: 6px;
+    font-size: 0.8rem;
+    display: flex;
+    gap: 16px;
+    flex-wrap: wrap;
+}
+
+.lightbox-stats .stat-item {
+    display: flex;
+    gap: 4px;
+    align-items: center;
+}
+
+.lightbox-stats .stat-item span {
+    opacity: 0.7;
+}
+
+.lightbox-stats .stat-item strong {
+    font-weight: 600;
+}
+
 /* Responsive adjustments */
 @media (max-width: 768px) {
     .templates-grid {