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/App.tsx

@@ -15,6 +15,7 @@ import { SettingsView } from "./views/SettingsView.js";
 import type { ThemeKey } from "./views/SettingsView.js";
 import { ProductDetail } from "./components/ProductDetail.js";
 import { AddProductFlow } from "./components/modals/AddProductFlow.js";
+import { EditProductFlow } from "./components/modals/EditProductFlow.js";
 import { ConsumeFlow } from "./components/modals/ConsumeFlow.js";
 import { MarkGoneFlow } from "./components/modals/MarkGoneFlow.js";
 import { AuditFlow } from "./components/modals/AuditFlow.js";
@@ -29,6 +30,7 @@ import {
 
 type ModalKey =
   | "add"
+  | "edit"
   | "consume"
   | "gone"
   | "audit"
@@ -93,6 +95,11 @@ export function App() {
     setModalProduct(p ?? null);
     setModal("audit");
   };
+  const openEdit = (p: Product) => {
+    setModalProduct(p);
+    setSelected(null);
+    setModal("edit");
+  };
 
   if (isLoading) {
     return (
@@ -181,10 +188,14 @@ export function App() {
           onConsume={openConsume}
           onMarkGone={openMarkGone}
           onAudit={openAudit}
+          onEdit={openEdit}
         />
       )}
 
       {modal === "add" && <AddProductFlow data={data} onClose={() => setModal(null)} />}
+      {modal === "edit" && modalProduct && (
+        <EditProductFlow data={data} product={modalProduct} onClose={() => setModal(null)} />
+      )}
       {modal === "consume" && (
         <ConsumeFlow data={data} onClose={() => setModal(null)} product={modalProduct} />
       )}