refactor(ui): unify mapping form into single shared component

Extract the SKU mapping modal (HTML + JS) from dashboard, logs, and
missing_skus into a shared component in base.html + shared.js. All pages
now use the same compact layout with CODMAT/Cant. column headers.

- Fix missing_skus backdrop bug: event.stopPropagation() on icon click
  prevents double modal open from <a> + <tr> event bubbling
- Shrink mappings addModal from modal-lg to regular size with compact layout
- Remove ~500 lines of duplicated modal HTML and JS across 4 pages
- Each page keeps a thin wrapper (openDashQuickMap, openLogsQuickMap,
  openMapModal) that calls shared openQuickMap() with an onSave callback

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

api/app/templates/dashboard.html

@@ -165,41 +165,8 @@
 </div>
 
 <!-- Quick Map Modal (used from order detail) -->
-<div class="modal fade" id="quickMapModal" tabindex="-1" data-bs-backdrop="static">
-    <div class="modal-dialog">
-        <div class="modal-content">
-            <div class="modal-header">
-                <h5 class="modal-title">Mapeaza SKU: <code id="qmSku"></code></h5>
-                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
-            </div>
-            <div class="modal-body">
-                <div style="margin-bottom:8px; font-size:0.85rem">
-                    <small class="text-muted">Produs:</small> <strong id="qmProductName"></strong>
-                </div>
-                <div class="qm-row" style="font-size:0.7rem; color:#9ca3af; padding:0 0 2px">
-                    <span style="flex:1">CODMAT</span>
-                    <span style="width:70px">Cant.</span>
-                    <span style="width:70px">%</span>
-                    <span style="width:30px"></span>
-                </div>
-                <div id="qmCodmatLines">
-                    <!-- Dynamic CODMAT lines -->
-                </div>
-                <button type="button" class="btn btn-sm btn-outline-secondary mt-1" onclick="addQmCodmatLine()" style="font-size:0.8rem; padding:2px 10px">
-                    + CODMAT
-                </button>
-                <div id="qmDirectInfo" class="alert alert-info mt-2" style="display:none; font-size:0.85rem; padding:8px 12px;"></div>
-                <div id="qmPctWarning" class="text-danger mt-2" style="display:none;"></div>
-            </div>
-            <div class="modal-footer">
-                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Anuleaza</button>
-                <button type="button" class="btn btn-primary" id="qmSaveBtn" onclick="saveQuickMapping()">Salveaza</button>
-            </div>
-        </div>
-    </div>
-</div>
 {% endblock %}
 
 {% block scripts %}
-<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=22"></script>
+<script src="{{ request.scope.get('root_path', '') }}/static/js/dashboard.js?v=24"></script>
 {% endblock %}