fix(analytics): harden period-linked sales queries

templates/sales_analysis.html

@@ -551,7 +551,7 @@
             <span><i class="fas fa-industry me-2" aria-hidden="true"></i>廠商毛利與主推優先序</span>
             <div class="d-flex align-items-center gap-2">
               {{ period_badge(analysis_scope) }}
-              <a href="/api/export/excel/vendor?{{ request.query_string.decode() }}" class="btn btn-sm btn-outline-success">
+              <a href="/api/sales_analysis/export_vendor?{{ request.query_string.decode() }}" class="btn btn-sm btn-outline-success">
                 <i class="fas fa-file-excel me-1" aria-hidden="true"></i>匯出清單
               </a>
             </div>
@@ -578,7 +578,8 @@
                   <tr>
                     <td class="text-center text-muted">{{ loop.index }}</td>
                     <td class="fw-bold">
-                      <a href="javascript:setFilter('vendor', '{{ v.name }}')" class="sa-vendor-link" title="篩選此廠商商品">
+                      <a href="#" class="sa-vendor-link" title="篩選此廠商商品"
+                         data-sales-filter-key="vendor" data-sales-filter-value="{{ v.name }}">
                         {{ v.name }}
                         <i class="fas fa-filter ms-1 sa-vendor-link__icon" aria-hidden="true"></i>
                       </a>