feat(wizard): add real-time bi-directional sync, debounced auto-save, and bot draft prefill

frontend/src/lib/api.ts

@@ -1020,6 +1020,41 @@ export const api = {
     },
   },
 
+  drafts: {
+    get: async (
+      id: string,
+    ): Promise<{
+      id: string;
+      chat_id: number;
+      kind: string;
+      status: string;
+      payload: Record<string, any>;
+      missing?: { fields?: { ok: boolean; key: string; label: string; blocking: boolean }[] } | null;
+      source?: string;
+      created_at?: string;
+      updated_at?: string;
+    }> => {
+      return getData(`/drafts/${id}`);
+    },
+    update: async (
+      id: string,
+      payload: Record<string, any>,
+    ): Promise<void> => {
+      await patchData(`/drafts/${id}`, { payload });
+    },
+    commit: async (
+      id: string,
+      quoteId?: string,
+    ): Promise<void> => {
+      await postData(`/drafts/${id}/commit`, { quote_id: quoteId });
+    },
+    cancel: async (
+      id: string,
+    ): Promise<void> => {
+      await postData(`/drafts/${id}/cancel`, {});
+    },
+  },
+
   suppliers: {
     list: async (): Promise<Supplier[]> => {
       const raw = await getData<RawSupplier[]>(`/suppliers?page_size=${PAGE_SIZE}`);