feat: 队列日期格式化 + 任务分母改为真正要下载的数量

- 队列卡片：显示 📅 2025-11-20 至 2026-04-23，替代原 SQL filter 字符串
- 任务状态：分母改为 qualified - existing_skipped（本次真正待下载数），
  跳过文案在有本次跳过时追加"其中本次跳过 X"
- 新增 existing_skipped 计数器，在 "文件已存在" 和 "db 标记跳过" 两处独立递增

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

module/templates/index.html

@@ -1281,6 +1281,14 @@
            (endDate ? ' and message_date <= ' + endDate + ' 23:59:59' : '');
   }
 
+  // 把队列里的起止日期格式化成 "📅 2025-11-20 至 2026-04-23"；无日期则 fallback 到原 filter
+  function formatQueueDateRange(startDate, endDate, fallbackFilter) {
+    if (startDate) {
+      return '📅 ' + startDate + ' 至 ' + (endDate || startDate);
+    }
+    return fallbackFilter || '无过滤条件';
+  }
+
   function renderQueue() {
     const card = document.getElementById('queue-card');
     const list = document.getElementById('queue-list');
@@ -1288,16 +1296,19 @@
     if (!downloadQueue.length) { card.style.display = 'none'; return; }
     card.style.display = '';
     count.textContent = downloadQueue.length + ' 个';
-    list.innerHTML = downloadQueue.map((q, i) => `
+    list.innerHTML = downloadQueue.map((q, i) => {
+      const dateStr = formatQueueDateRange(q.start_date, q.end_date, q.download_filter);
+      return `
       <div class="queue-item">
         <div class="queue-num">${i + 1}</div>
         <div class="queue-info">
           <div class="queue-name">${escapeHtml(q.chat_title || q.chat_id)}</div>
-          <div class="queue-filter" title="${escapeHtml(q.download_filter || '')}">${escapeHtml(q.download_filter || '无过滤条件')}</div>
+          <div class="queue-filter" title="${escapeHtml(q.download_filter || '')}">${escapeHtml(dateStr)}</div>
         </div>
         <button class="queue-del" onclick="removeFromQueue(${i})" title="移除">✕</button>
       </div>
-    `).join('');
+    `;
+    }).join('');
   }
 
   function addToQueue() {
@@ -1454,27 +1465,31 @@
         document.getElementById('banner-chat').textContent = title;
         const dl = p.downloading_files||0, done = p.completed_files||0, skip = p.skipped_files||0;
         const qual = p.qualified_files||0, est = p.estimated_total||0;
-        // 分母优先用缓存值；没有就用当次遍历实时累加的 qualified
-        const total = est || qual;
-        const doneStr = total ? `${done} / ${total}` : `${done}`;
+        const existingSkip = p.existing_skipped || 0;
+        // 分母优先用缓存值；没有就用当次遍历实时累加的 qualified。再扣除"本次任务已跳过"，得到真正要下载的数量
+        const rawTotal = est || qual;
+        const realTotal = Math.max(0, rawTotal - existingSkip);
+        const doneStr = rawTotal ? `${done} / ${realTotal}` : `${done}`;
+        // 跳过文案：有本次跳过时追加说明
+        const skipStr = existingSkip > 0 ? `跳过${skip}，其中本次跳过${existingSkip}` : `跳过${skip}`;
         let st = '';
-        if (p.is_checking && paused)    st = `⏸ 已暂停 · 扫描中… (跳过${skip})`;
-        else if (p.is_checking && dl>0) st = `🔍 扫描+下载中 (${dl}个，${doneStr}，跳过${skip})`;
-        else if (p.is_checking)         st = `🔍 扫描中… (${doneStr}，跳过${skip})`;
-        else if (paused)                st = `⏸ 已暂停 (${doneStr}，跳过${skip})`;
-        else if (dl>0)                  st = `🚀 下载中 (${dl}个，${doneStr}，跳过${skip})`;
-        else if (done>0||skip>0)        st = `✅ 完成 (${doneStr}，跳过${skip})`;
+        if (p.is_checking && paused)    st = `⏸ 已暂停 · 扫描中… (${skipStr})`;
+        else if (p.is_checking && dl>0) st = `🔍 扫描+下载中 (${dl}个，${doneStr}，${skipStr})`;
+        else if (p.is_checking)         st = `🔍 扫描中… (${doneStr}，${skipStr})`;
+        else if (paused)                st = `⏸ 已暂停 (${doneStr}，${skipStr})`;
+        else if (dl>0)                  st = `🚀 下载中 (${dl}个，${doneStr}，${skipStr})`;
+        else if (done>0||skip>0)        st = `✅ 完成 (${doneStr}，${skipStr})`;
         else                            st = '⏳ 等待开始';
         document.getElementById('banner-state').textContent = st;
 
         // 进度条：有总数才显示；扫描中且无缓存时给"扫描中…"后缀
         const prog = document.getElementById('banner-progress');
-        if (total > 0) {
+        if (realTotal > 0) {
           prog.style.display = 'flex';
-          const pct = Math.min(100, Math.round(done * 100 / total));
+          const pct = Math.min(100, Math.round(done * 100 / realTotal));
           document.getElementById('tbp-fill').style.width = pct + '%';
           const suffix = (!est && p.is_checking) ? '（扫描中…）' : '';
-          document.getElementById('tbp-text').textContent = `${done} / ${total}${suffix}`;
+          document.getElementById('tbp-text').textContent = `${done} / ${realTotal}${suffix}`;
         } else {
           prog.style.display = 'none';
         }