diff --git a/TODO_NEXT_STEPS.txt b/TODO_NEXT_STEPS.txt
index 4ec848d..14ed8fe 100644
--- a/TODO_NEXT_STEPS.txt
+++ b/TODO_NEXT_STEPS.txt
@@ -4,6 +4,7 @@
 ================================================================================
 
 【已完成】
+   - V10.192 補 `/observability/ppt_audit_history` 最近可預覽簡報 workbench：最新 4 份 PPT 直接在控制台下方提供線上預覽與下載，降低使用者找檔案的操作成本；完整檔案清單仍保留在下方表格。
    - V10.190 補 `/observability/ppt_audit_file/<filename>` 站內線上預覽：PPTX 由 LibreOffice 轉 PDF 快取後以 iframe 預覽，保留原始 PPTX 下載；Dockerfile 加 `libreoffice-impress`，compose 預設啟用 `PPT_VISION_ENABLED=true`，PPT 產線頁新增視覺 QA 停用原因與更精簡的控制台式排版。
    - V10.188 補強 `/observability/ppt_audit_history` PPT 視覺 QA 產線：頁面明確呈現每日、每週、每月、每季、每半年、每年定期產出節奏，並顯示 `ppt_generation_runs` DB 寫入紀錄；保留自動補齊缺漏與資料庫/檔案覆蓋狀態。
    - V10.187 修正 `/daily_sales`、`/growth_analysis` 圖表空白：Chart JSON 改從 `<template>.content.textContent` 讀取，補空資料診斷狀態；成長分析改用 realtime 明細新鮮度覆蓋過期月結摘要，並為 growth cache 加入資料指紋。
diff --git a/config.py b/config.py
index c7562df..330ef92 100644
--- a/config.py
+++ b/config.py
@@ -320,7 +320,7 @@ YOUTUBE_API_KEY = os.getenv('YOUTUBE_API_KEY', '')
 # ==========================================
 # 系統版本與路徑
 # ==========================================
-SYSTEM_VERSION = "V10.191"
+SYSTEM_VERSION = "V10.192"
 LOG_FILE_PATH = os.path.join(BASE_DIR, 'logs/system.log')
 public_url = PUBLIC_URL  # 用於模板顯示
 
diff --git a/templates/admin/ppt_audit_history.html b/templates/admin/ppt_audit_history.html
index 07a6b1c..ce6826b 100644
--- a/templates/admin/ppt_audit_history.html
+++ b/templates/admin/ppt_audit_history.html
@@ -89,6 +89,45 @@
       {% endfor %}
     </div>
   </section>
+  {% if files %}
+  <section class="ppt-deck-workbench" aria-label="最近可預覽簡報">
+    <div class="ppt-workbench-head">
+      <div>
+        <div class="ppt-label">Preview Workbench</div>
+        <h2 class="ppt-panel-title">最近可預覽簡報</h2>
+      </div>
+      <small class="text-muted">最新 {{ files[:4]|length }} 份，直接線上預覽或下載原始 PPTX</small>
+    </div>
+    <div class="ppt-deck-rail">
+      {% for f in files[:4] %}
+      <article class="ppt-deck-card {% if not f.file_exists or not f.is_valid_ppt %}is-disabled{% endif %}">
+        <div class="ppt-deck-meta">
+          <span class="ppt-label">{{ selected_report_type.label }}</span>
+          <span>{{ f.mtime }}</span>
+        </div>
+        <h3>{{ f.name }}</h3>
+        <div class="ppt-deck-facts">
+          <span>{{ f.size_kb if f.size_kb is not none else '—' }} KB</span>
+          <span>{{ f.source }}</span>
+          {% if f.file_exists and f.is_valid_ppt %}<span class="status-good">可預覽</span>{% else %}<span class="status-bad">需回補</span>{% endif %}
+        </div>
+        <div class="ppt-file-actions">
+          {% if f.file_exists and f.is_valid_ppt %}
+          <a class="btn btn-outline-primary btn-sm" href="{{ url_for('admin_observability.ppt_audit_file', filename=f.name) }}" target="_blank" rel="noopener">
+            <i class="fas fa-eye me-1"></i>線上預覽
+          </a>
+          {% endif %}
+          {% if f.file_exists %}
+          <a class="btn btn-outline-secondary btn-sm" href="{{ url_for('admin_observability.ppt_audit_file', filename=f.name, action='download') }}">
+            <i class="fas fa-download me-1"></i>下載
+          </a>
+          {% endif %}
+        </div>
+      </article>
+      {% endfor %}
+    </div>
+  </section>
+  {% endif %}
   <section class="ppt-panel mt-3"
            data-ppt-auto-generation
            data-auto-start="{{ 'true' if auto_generation.can_auto_start else 'false' }}"
diff --git a/tests/test_admin_observability_routes.py b/tests/test_admin_observability_routes.py
index 63c8f1d..7caa317 100644
--- a/tests/test_admin_observability_routes.py
+++ b/tests/test_admin_observability_routes.py
@@ -217,6 +217,27 @@ def test_ppt_audit_history_shows_ppt_schedule_and_db_runs(client, monkeypatch):
     assert '每日日報' in html
 
 
+def test_ppt_audit_history_shows_recent_preview_workbench(client, monkeypatch, tmp_path):
+    """有檔案時，頁面上方要先給可預覽簡報入口。"""
+    import zipfile
+
+    reports_dir = tmp_path / 'reports'
+    reports_dir.mkdir()
+    pptx = reports_dir / 'ocbot_daily_20260517.pptx'
+    with zipfile.ZipFile(pptx, 'w') as zf:
+        zf.writestr('[Content_Types].xml', '<Types></Types>')
+
+    monkeypatch.setenv('REPORTS_DIR', str(reports_dir))
+
+    r = client.get('/observability/ppt_audit_history?month=2026-05')
+    html = r.data.decode('utf-8')
+
+    assert r.status_code == 200
+    assert '最近可預覽簡報' in html
+    assert 'ocbot_daily_20260517.pptx' in html
+    assert '線上預覽' in html
+
+
 def test_ppt_audit_file_view_renders_online_preview(client, monkeypatch, tmp_path):
     """PPTX view 入口應回站內預覽頁，而不是把 PPTX 直接丟給瀏覽器。"""
     import zipfile
diff --git a/web/static/css/page-ppt-audit-history.css b/web/static/css/page-ppt-audit-history.css
index 5fade4a..f6178ba 100644
--- a/web/static/css/page-ppt-audit-history.css
+++ b/web/static/css/page-ppt-audit-history.css
@@ -123,6 +123,65 @@
   gap: var(--momo-space-1, 4px);
 }
 
+.ppt-deck-workbench {
+  margin-top: var(--momo-space-4, 16px);
+  padding: var(--momo-space-4, 16px);
+  border: 1px solid var(--obs-line);
+  border-radius: var(--momo-radius-lg, 8px);
+  background:
+    radial-gradient(circle, rgba(45, 40, 32, 0.08) 1px, transparent 1.2px),
+    rgba(255, 255, 255, 0.5);
+  background-size: 10px 10px, auto;
+  box-shadow: var(--momo-shadow-md, 0 16px 38px rgba(70, 46, 28, 0.08));
+}
+
+.ppt-workbench-head {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: var(--momo-space-3, 12px);
+  margin-bottom: var(--momo-space-3, 12px);
+}
+
+.ppt-deck-rail {
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: var(--momo-space-3, 12px);
+}
+
+.ppt-deck-card {
+  display: grid;
+  align-content: space-between;
+  min-height: 168px;
+  padding: var(--momo-space-3, 12px);
+  border: 1px solid var(--obs-line);
+  border-radius: var(--momo-radius-md, 6px);
+  background: rgba(255, 255, 255, 0.64);
+}
+
+.ppt-deck-card.is-disabled {
+  opacity: 0.68;
+}
+
+.ppt-deck-meta,
+.ppt-deck-facts {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--momo-space-2, 8px);
+  color: var(--obs-muted);
+  font-size: var(--momo-text-caption, 12px);
+}
+
+.ppt-deck-card h3 {
+  margin: var(--momo-space-2, 8px) 0;
+  color: var(--obs-ink);
+  font-size: var(--momo-text-body, 14px);
+  font-weight: var(--momo-font-weight-black, 800);
+  line-height: 1.35;
+  overflow-wrap: anywhere;
+}
+
 .ppt-grid {
   display: grid;
   grid-template-columns: minmax(0, 1.2fr) minmax(330px, 0.8fr);
@@ -439,6 +498,10 @@
     grid-template-columns: 1fr;
   }
 
+  .ppt-deck-rail {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+  }
+
   .ppt-auto-grid {
     grid-template-columns: repeat(2, minmax(0, 1fr));
   }
@@ -452,6 +515,7 @@
   .ppt-command,
   .ppt-auto-grid,
   .ppt-mini-grid,
+  .ppt-deck-rail,
   .ppt-coverage-score,
   .ppt-coverage-list {
     grid-template-columns: 1fr;
@@ -459,6 +523,7 @@
 
   .ppt-panel-head,
   .ppt-table-title,
+  .ppt-workbench-head,
   .ppt-run-log-head,
   .ppt-run-row,
   .ppt-coverage-row {