Edit existing products

Adds PATCH /products/:id and an EditProductFlow modal opened from the
product drawer. Editable fields cover name, brand, shop, bin, asset tag,
price, purchase date, size (weight or count + unit weight), and the
cannabinoid profile. SKU, type, kind, and status-derived dates stay
locked because changing them would invalidate audit history math; type
changes are surfaced as "mark gone, add new" in the modal.

The strain row is re-resolved on name or brand change so analytics stay
aligned, and the last-audit mirror (last_audit_weight / count_last_audit)
only syncs with the original size when there are no audits yet.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/src/components/ProductDetail.tsx

@@ -10,6 +10,7 @@ export function ProductDetail({
   onConsume,
   onMarkGone,
   onAudit,
+  onEdit,
 }: {
   product: Product;
   data: Bootstrap;
@@ -17,6 +18,7 @@ export function ProductDetail({
   onConsume: (p: Product) => void;
   onMarkGone: (p: Product) => void;
   onAudit: (p: Product) => void;
+  onEdit: (p: Product) => void;
 }) {
   const bin = data.bins.find((b) => b.id === product.binId);
   const cfg = TYPES.find((t) => t.id === product.type);
@@ -128,6 +130,9 @@ export function ProductDetail({
                 Mark gone
               </Btn>
             )}
+            <Btn variant="ghost" icon="edit" onClick={() => onEdit(product)}>
+              Edit
+            </Btn>
             <Btn variant="ghost" icon="close" onClick={onClose} />
           </div>
         </div>