fix: map factory API response to expected shape for plan pages

The /purchaser/factories endpoint returns CompanyRelationship objects
(factory_company_id, factory_name, factory_type) but the UI expected
Company objects (id, name). Now maps and filters by factory_type:
- NewPlan: shows only textile factories
- NewWashingPlan: shows only washing factories

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

src/pages/purchaser/NewPlan.tsx

@@ -116,7 +116,13 @@ export function NewPlan() {
   const fetchFactories = async () => {
     if (!auth.company) return;
     const data = await purchaserApi.listFactories();
-    setFactories(data || []);
+    const textileFactories = (data || [])
+      .filter((r: any) => r.factory_type === 'textile')
+      .map((r: any) => ({
+        id: r.factory_company_id,
+        name: r.factory_name || r.factory_company_id,
+      })) as Company[];
+    setFactories(textileFactories);
   };
 
   // 根据搜索词筛选产品

src/pages/purchaser/NewWashingPlan.tsx

@@ -1,7 +1,7 @@
 import React, { useState, useEffect, useCallback, useMemo } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { useAuth } from '../../contexts/AuthContext';
-import { purchaserApi, http } from '../../api';
+import { purchaserApi } from '../../api';
 import { motion } from 'framer-motion';
 import { ArrowLeft, Plus, Droplets, Calculator, AlertCircle } from 'lucide-react';
 import { useResponsive } from '../../hooks/useResponsive';
@@ -60,8 +60,14 @@ export function NewWashingPlan() {
   // 获取水洗厂列表
   const fetchWashingFactories = useCallback(async () => {
     try {
-      const res = await http.get<Company[]>('/purchaser/factories', { role: 'washing' });
+      const res = await purchaserApi.listFactories();
-      setWashingFactories(res.data || []);
+      const factories = (res || [])
+        .filter((r: any) => r.factory_type === 'washing')
+        .map((r: any) => ({
+          id: r.factory_company_id,
+          name: r.factory_name || r.factory_company_id,
+        })) as Company[];
+      setWashingFactories(factories);
     } catch {
       setWashingFactories([]);
     }