diff --git a/routes/admin_observability_routes.py b/routes/admin_observability_routes.py
index 027ee4c..69cbabb 100644
--- a/routes/admin_observability_routes.py
+++ b/routes/admin_observability_routes.py
@@ -2235,6 +2235,7 @@ def ppt_audit_history():
         if not os.path.isdir(reports_dir):
             error = f'{reports_dir} 目錄不存在'
         else:
+            files_by_name = {}
             for f in os.listdir(reports_dir):
                 if not f.lower().endswith('.pptx'):
                     continue
@@ -2247,14 +2248,68 @@ def ppt_audit_history():
                 try:
                     mtime = os.path.getmtime(full)
                     if month_start_ts <= mtime < month_end_ts:
-                        files.append({
+                        files_by_name[f] = {
+                            'source': 'filesystem',
                             'name': f,
                             'size_kb': round(os.path.getsize(full) / 1024, 1),
                             'mtime': datetime.fromtimestamp(mtime).strftime('%Y-%m-%d %H:%M'),
                             'mtime_ts': mtime,
-                        })
+                            'file_exists': True,
+                            'file_path': full,
+                        }
                 except OSError:
                     continue
+
+            # 補充：若 188 主機僅保留 DB 快取紀錄或掃描過程漏掉，仍可回補當月報表清單
+            try:
+                session = get_session()
+                try:
+                    sql = """
+                        SELECT report_type, file_path, file_size, generated_at
+                        FROM ppt_reports
+                        WHERE generated_at >= :month_start
+                          AND generated_at < :month_end
+                    """
+                    params = {'month_start': month_start, 'month_end': month_end}
+                    if report_type != 'all':
+                        sql += " AND report_type = :report_type"
+                        params['report_type'] = report_type
+                    rows = session.execute(sa_text(sql), params).fetchall()
+
+                    for rpt_type, file_path, file_size, generated_at in rows:
+                        if not file_path:
+                            continue
+                        name = os.path.basename(file_path)
+                        if not name.lower().endswith('.pptx'):
+                            continue
+                        if report_prefix != 'all' and not name.startswith(report_prefix):
+                            continue
+                        if name in files_by_name:
+                            files_by_name[name]['source'] = 'both'
+                            continue
+                        if not generated_at:
+                            continue
+                        mtime = generated_at.timestamp()
+                        if not (month_start_ts <= mtime < month_end_ts):
+                            continue
+                        candidate_path = os.path.join(reports_dir, name)
+                        exists = os.path.isfile(candidate_path)
+                        files_by_name[name] = {
+                            'source': 'database',
+                            'name': name,
+                            'size_kb': round((file_size or 0) / 1024, 1),
+                            'mtime': generated_at.strftime('%Y-%m-%d %H:%M'),
+                            'mtime_ts': mtime,
+                            'file_exists': exists,
+                            'file_path': candidate_path if exists else file_path,
+                            'report_type': rpt_type,
+                        }
+                finally:
+                    session.close()
+            except Exception:
+                pass
+
+            files = list(files_by_name.values())
             files.sort(key=lambda x: x['mtime_ts'], reverse=True)
     except Exception as e:
         error = f'{type(e).__name__}: {str(e)[:200]}'
diff --git a/templates/admin/ppt_audit_history.html b/templates/admin/ppt_audit_history.html
index b53ffc8..a2140bf 100644
--- a/templates/admin/ppt_audit_history.html
+++ b/templates/admin/ppt_audit_history.html
@@ -274,7 +274,7 @@
           </div>
         </div>
         <div class="table-responsive">
-          <table class="table table-sm mb-0">
+            <table class="table table-sm mb-0">
             <thead class="table-light">
             <tr><th>檔名</th><th class="text-end">KB</th><th>修改時間</th><th>狀態</th><th>操作</th></tr>
             </thead>
@@ -282,17 +282,29 @@
               {% for f in files %}
               <tr>
                 <td><code>{{ f.name }}</code></td>
-                <td class="text-end">{{ f.size_kb }}</td>
+                <td class="text-end">{{ f.size_kb if f.size_kb is not none else '—' }}</td>
                 <td><small>{{ f.mtime }}</small></td>
-                <td><small class="text-muted">22:00 排程掃描</small></td>
+                <td>
+                  {% if f.source == 'database' %}
+                    <span class="text-muted">{% if f.file_exists %}資料庫快取 + 檔案可存取{% else %}資料庫快取（檔案未落盤）{% endif %}</span>
+                  {% elif f.source == 'both' %}
+                    <span class="text-success">檔案 + 資料庫</span>
+                  {% else %}
+                    <span class="text-muted">22:00 掃描落盤</span>
+                  {% endif %}
+                </td>
                 <td>
                   <div class="ppt-file-actions">
+                    {% if f.file_exists %}
                     <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-file-powerpoint me-1"></i>開啟
                     </a>
                     <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>
+                    {% else %}
+                    <span class="small text-muted">本機暫無檔案，請先至來源回補</span>
+                    {% endif %}
                   </div>
                 </td>
               </tr>