Fix 18 UX issues: confirmations, undo, drawer nav, empty states, and polish

Comprehensive UX audit covering modals, drawers, dashboard, and inventory.
Key changes: confirmation steps before destructive actions, undo via toast
for consume/gone/checkout, back-navigation across entity drawers, optional
ratings, discrete item count field, audit progress bar, and sortable column
affordance.

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

web/src/api.ts

@@ -147,6 +147,15 @@ export const api = {
       body: JSON.stringify(body),
     }),
 
+  reactivateInventoryItem: (
+    id: string,
+    body: { binId: string },
+  ) =>
+    request<{ ok: true }>(`/inventory/${id}/reactivate`, {
+      method: "POST",
+      body: JSON.stringify(body),
+    }),
+
   auditInventoryItem: (
     id: string,
     body: { date: string; mode: AuditMode; value: number; confirmedBy?: string },