Replace collapsible stream groups with sub-tabs navigation

- Replace expandable/collapsible groups with tab bar (Screen Capture, Static Image, Processed)
- Persist active stream tab in localStorage
- Shorten tab labels by removing "Streams" suffix
- Remove type badge from cards (redundant with tab separation)
- Add count badge on each tab with active highlight

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

server/src/wled_controller/static/style.css

@@ -2176,67 +2176,58 @@ 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 {
+/* Stream sub-tabs */
+.stream-tab-bar {
     display: flex;
     align-items: center;
-    gap: 8px;
-    margin-bottom: 12px;
-    padding-bottom: 8px;
+    gap: 4px;
     border-bottom: 2px solid var(--border-color);
-    cursor: pointer;
-    user-select: none;
-    transition: opacity 0.2s;
+    margin-bottom: 16px;
 }
 
-.stream-group-header:hover {
-    opacity: 0.8;
-}
-
-.stream-group-chevron {
-    font-size: 10px;
+.stream-tab-btn {
+    background: none;
+    border: none;
+    padding: 8px 14px;
+    font-size: 0.9rem;
+    font-weight: 500;
     color: var(--text-secondary);
-    flex-shrink: 0;
-    width: 12px;
-    transition: transform 0.2s;
+    cursor: pointer;
+    border-bottom: 2px solid transparent;
+    margin-bottom: -2px;
+    transition: color 0.2s, border-color 0.2s;
 }
 
-.stream-group.collapsed .stream-group-header {
-    margin-bottom: 0;
-    border-bottom-color: transparent;
-}
-
-.stream-group.collapsed .templates-grid {
-    display: none;
-}
-
-.stream-group-icon {
-    font-size: 1.2rem;
-}
-
-.stream-group-title {
-    font-size: 1rem;
-    font-weight: 600;
+.stream-tab-btn:hover {
     color: var(--text-color);
 }
 
-.stream-group-count {
+.stream-tab-btn.active {
+    color: var(--primary-color);
+    border-bottom-color: var(--primary-color);
+}
+
+.stream-tab-count {
     background: var(--border-color);
     color: var(--text-secondary);
-    font-size: 0.75rem;
+    font-size: 0.7rem;
     font-weight: 600;
-    padding: 2px 8px;
-    border-radius: 10px;
-    min-width: 20px;
-    text-align: center;
+    padding: 1px 6px;
+    border-radius: 8px;
+    margin-left: 4px;
+}
+
+.stream-tab-btn.active .stream-tab-count {
+    background: var(--primary-color);
+    color: #fff;
+}
+
+.stream-tab-panel {
+    display: none;
+}
+
+.stream-tab-panel.active {
+    display: block;
 }
 
 /* Image Lightbox */