feat: drag to reorder help center articles across pages (#14910)

app/javascript/dashboard/store/modules/helpCenterArticles/actions.js

@@ -157,11 +157,13 @@ export const actions = {
     // Update positions in the store immediately so subsequent mutations preserve correct positions
     commit(types.SET_ARTICLE_POSITIONS, reorderedGroup);
     try {
-      await articlesAPI.reorderArticles({
+      const { data } = await articlesAPI.reorderArticles({
         portalSlug,
         reorderedGroup,
         categorySlug,
       });
+      // Adopt the backend's re-spaced positions so the next reorder isn't computed from stale local values.
+      if (data?.positions) commit(types.SET_ARTICLE_POSITIONS, data.positions);
     } catch (error) {
       commit(types.SET_ARTICLE_POSITIONS, oldPositions);
       throw error;

app/javascript/dashboard/store/modules/helpCenterArticles/specs/action.spec.js

@@ -314,6 +314,25 @@ describe('#actions', () => {
       );
     });
 
+    it('adopts the backend re-spaced positions when the response returns them', async () => {
+      const serverPositions = { 1: 10, 2: 30, 3: 20 };
+      axios.post.mockResolvedValue({ data: { positions: serverPositions } });
+
+      await actions.reorder(
+        { commit, state },
+        {
+          portalSlug: 'test-portal',
+          categorySlug: 'test-category',
+          reorderedGroup: { 3: 25 },
+        }
+      );
+
+      expect(commit).toHaveBeenCalledWith(
+        types.default.SET_ARTICLE_POSITIONS,
+        serverPositions
+      );
+    });
+
     it('rolls back positions and throws when API call fails', async () => {
       axios.post.mockRejectedValue({ message: 'Network error' });
       const reorderedGroup = { 1: 1, 2: 2 };