feat(merge-split): add queue checkboxes and merge-group selection UI

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/renderer-queue.ts

@@ -31,7 +31,8 @@ function getQueueRenderFingerprint(items: QueueItem[]): string {
         item.speed || '',
         item.eta || '',
         item.progressStatus || '',
-        item.last_error || ''
+        item.last_error || '',
+        item.mergeGroup?.mergePhase || ''
     ].join(':'));
 
     return `${lang}|${pieces.join('|')}`;
@@ -138,6 +139,45 @@ function getQueueMetaText(item: QueueItem): string {
     return parts.join(' | ');
 }
 
+function toggleQueueSelection(id: string): void {
+    if (selectedQueueIds.has(id)) {
+        selectedQueueIds.delete(id);
+    } else {
+        selectedQueueIds.add(id);
+    }
+    renderQueue();
+    updateMergeGroupButton();
+}
+
+function updateMergeGroupButton(): void {
+    const btn = byId<HTMLButtonElement>('btnMergeGroup');
+    if (!btn) return;
+
+    // Clean up selections: only keep IDs that are still pending in queue
+    const validIds = new Set(
+        queue.filter(item => item.status === 'pending' && !item.mergeGroup).map(item => item.id)
+    );
+    selectedQueueIds = new Set([...selectedQueueIds].filter(id => validIds.has(id)));
+
+    if (selectedQueueIds.size >= 2) {
+        btn.style.display = '';
+        btn.textContent = `${UI_TEXT.mergeGroup.btn} (${selectedQueueIds.size})`;
+        btn.disabled = false;
+    } else {
+        btn.style.display = 'none';
+    }
+}
+
+async function createMergeGroupFromSelection(): Promise<void> {
+    if (selectedQueueIds.size < 2) return;
+
+    const ids = [...selectedQueueIds];
+    selectedQueueIds.clear();
+    queue = await window.api.createMergeGroup(ids);
+    renderQueue();
+    updateMergeGroupButton();
+}
+
 function renderQueue(): void {
     if (!Array.isArray(queue)) {
         queue = [];
@@ -172,15 +212,29 @@ function renderQueue(): void {
             : (hasDeterminateProgress ? Math.max(0, Math.min(100, item.progress)) : 0);
         const progressClass = item.status === 'downloading' && !hasDeterminateProgress ? ' indeterminate' : '';
 
+        const isMergeGroup = !!item.mergeGroup;
+        const showCheckbox = item.status === 'pending' && !isMergeGroup;
+        const isChecked = selectedQueueIds.has(item.id);
+        const mergeIcon = isMergeGroup
+            ? '<svg class="merge-group-icon" viewBox="0 0 24 24" fill="currentColor" width="14" height="14"><path d="M17 20.41L18.41 19 15 15.59 13.59 17 17 20.41zM7.5 8H11v5.59L5.59 19 7 20.41l6-6V8h3.5L12 3.5 7.5 8z"/></svg> '
+            : '';
+        const mergeMetaExtra = isMergeGroup
+            ? ` (${item.mergeGroup!.items.length} VODs)`
+            : '';
+
         return `
-            <div class="queue-item">
+            <div class="queue-item${isMergeGroup ? ' merge-group' : ''}">
+                ${showCheckbox
+                    ? `<input type="checkbox" class="queue-checkbox" ${isChecked ? 'checked' : ''} onchange="toggleQueueSelection('${item.id}')" />`
+                    : ''
+                }
                 <div class="status ${item.status}"></div>
                 <div class="queue-main">
                     <div class="queue-title-row">
-                        <div class="title" title="${safeTitle}">${isClip}${safeTitle}</div>
+                        <div class="title" title="${safeTitle}">${mergeIcon}${isClip}${safeTitle}</div>
                         <div class="queue-status-label">${safeStatusLabel}</div>
                     </div>
-                    <div class="queue-meta">${safeMeta}</div>
+                    <div class="queue-meta">${safeMeta}${mergeMetaExtra}</div>
                     <div class="queue-progress-wrap">
                         <div class="queue-progress-bar${progressClass}" style="width: ${progressValue}%;"></div>
                     </div>
@@ -191,6 +245,7 @@ function renderQueue(): void {
         `;
     }).join('');
 
+    updateMergeGroupButton();
     lastQueueRenderFingerprint = renderFingerprint;
 }
 

src/renderer-shared.ts

@@ -24,6 +24,7 @@ let currentStreamer: string | null = null;
 let isConnected = false;
 let downloading = false;
 let queue: QueueItem[] = [];
+let selectedQueueIds: Set<string> = new Set();
 
 let cutterFile: string | null = null;
 let cutterVideoInfo: VideoInfo | null = null;