feat(ui): order totals, decimals, mobile modal cards, set editing

- Dashboard/Logs: Total column with 2 decimals (order_total)
- Order detail modal: totals summary row (items total + order total)
- Order detail modal mobile: compact article cards (d-md-none)
- Mappings: openEditModal loads all CODMATs for SKU, saveMapping
  replaces entire set via delete-all + batch POST
- Add project-specific team agents: ui-templates, ui-js, ui-verify,
  backend-api
- CLAUDE.md: mandatory preview approval before implementation,
  fix-loop after verification, server must start via start.sh

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/app/static/css/style.css

@@ -713,3 +713,26 @@ tr.mapping-deleted td {
     /* Hide per-page selector on mobile */
     .per-page-label { display: none; }
 }
+
+/* Mobile article cards in order detail modal */
+.detail-item-card {
+    border: 1px solid #e5e7eb;
+    border-radius: 6px;
+    padding: 0.5rem 0.75rem;
+    margin-bottom: 0.5rem;
+    font-size: 0.875rem;
+}
+.detail-item-card .card-sku {
+    font-family: monospace;
+    font-size: 0.8rem;
+    color: #6b7280;
+}
+.detail-item-card .card-name {
+    font-weight: 500;
+    margin-bottom: 0.25rem;
+}
+.detail-item-card .card-details {
+    display: flex;
+    gap: 1rem;
+    color: #374151;
+}