Allow editing SKU value from the Edit SKU modal

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

server/src/routes/products.ts

@@ -91,6 +91,7 @@ productsRouter.post("/products", (req, res) => {
 });
 
 type UpdateBody = Partial<{
+  sku: string;
   type: string;
   kind: "bulk" | "discrete";
   strainId: string | null;
@@ -105,13 +106,21 @@ productsRouter.patch("/products/:id", (req, res) => {
   const existing = db
     .prepare<
       [string],
-      { id: string; type: string; kind: string; strain_id: string; brand_id: string | null }
+      { id: string; sku: string; type: string; kind: string; strain_id: string; brand_id: string | null }
     >(
-      `SELECT id, type, kind, strain_id, brand_id FROM products WHERE id = ?`,
+      `SELECT id, sku, type, kind, strain_id, brand_id FROM products WHERE id = ?`,
     )
     .get(id);
   if (!existing) return res.status(404).json({ error: "product not found" });
 
+  const nextSku = typeof body.sku === "string" && body.sku.trim() ? body.sku.trim() : existing.sku;
+  if (nextSku !== existing.sku) {
+    const duplicate = db
+      .prepare<[string, string], { id: string }>("SELECT id FROM products WHERE sku = ? AND id != ?")
+      .get(nextSku, id);
+    if (duplicate) return res.status(409).json({ error: "sku already exists" });
+  }
+
   const nextType = typeof body.type === "string" && body.type ? body.type : existing.type;
   const nextKind: "bulk" | "discrete" =
     body.kind === "bulk" || body.kind === "discrete"
@@ -144,8 +153,8 @@ productsRouter.patch("/products/:id", (req, res) => {
   }
 
   db.prepare(
-    `UPDATE products SET type = ?, kind = ?, strain_id = ?, brand_id = ? WHERE id = ?`,
-  ).run(nextType, nextKind, nextStrainId, nextBrandId, id);
+    `UPDATE products SET sku = ?, type = ?, kind = ?, strain_id = ?, brand_id = ? WHERE id = ?`,
+  ).run(nextSku, nextType, nextKind, nextStrainId, nextBrandId, id);
 
   res.json({ ok: true });
 });