Table Importing Added, UI updates

lib/api.ts

@@ -34,6 +34,12 @@ export const chemicalsApi = {
 
   remove: (id: string): Promise<void> =>
     apiFetch(`/api/chemicals/${id}`, { method: 'DELETE' }).then(() => undefined),
+
+  import: (rows: Partial<ChemicalInventory>[]): Promise<{ imported: number; errors: string[] }> =>
+    apiFetch('/api/chemicals/import', {
+      method: 'POST',
+      body: JSON.stringify({ rows }),
+    }).then(r => r.json()),
 };
 
 export const protocolsApi = {