feat: multi-dim comparison + clustering + per-supplier PDF export

Backend:
- BizComparisonVO: add composite score fields (priceScore, deliveryScore,
  qualityScore, serviceScore, compositeScore, rankBadge) + SupplierPlan cluster VO
- Mapper: join biz_supplier_evaluation for quality/service history scores
- Service: weighted scoring (price 40%/delivery 25%/quality 20%/service 15%),
  greedy clustering assigns each item to best-score supplier, groups into plans
- Controller: returns CompareResult with items + recommendedPlans

Frontend:
- Tab 1 (多维度比价): supplier rank cards with 4-dim progress bars
- Tab 2 (智能推荐方案): per-supplier cluster cards with explanation + PDF export
- PDF: logo header, score legend, items table, cluster reason per supplier

ruoyi-system/src/main/resources/mapper/bid/BizComparisonMapper.xml

@@ -1,25 +1,48 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="com.ruoyi.system.mapper.bid.BizComparisonMapper">
+
+  <!-- 核心比价数据：物料行 + 各供应商报价 + 历史评价均分 -->
   <select id="selectComparisonData" resultType="java.util.HashMap">
     SELECT
-      ri.item_id       AS rfqItemId,
-      ri.material_name AS materialName,
-      ri.spec          AS spec,
-      ri.unit          AS unit,
-      ri.quantity      AS quantity,
-      qi.unit_price    AS unitPrice,
-      qi.total_price   AS totalPrice,
-      qi.delivery_days AS deliveryDays,
-      q.quotation_id   AS quotationId,
-      q.quote_no       AS quoteNo,
-      q.supplier_id    AS supplierId,
-      s.supplier_name  AS supplierName
+      ri.item_id        AS rfqItemId,
+      ri.material_name  AS materialName,
+      ri.spec           AS spec,
+      ri.unit           AS unit,
+      ri.quantity       AS quantity,
+      qi.unit_price     AS unitPrice,
+      qi.total_price    AS totalPrice,
+      qi.delivery_days  AS deliveryDays,
+      q.quotation_id    AS quotationId,
+      q.quote_no        AS quoteNo,
+      q.supplier_id     AS supplierId,
+      s.supplier_name   AS supplierName,
+      s.contact         AS contact,
+      s.phone           AS phone,
+      COALESCE(ev.avg_quality,  3.0) AS avgQuality,
+      COALESCE(ev.avg_service,  3.0) AS avgService,
+      COALESCE(ev.eval_count,   0)   AS historyCount
     FROM biz_rfq_item ri
-    LEFT JOIN biz_quotation_item qi ON qi.rfq_item_id = ri.item_id
-    LEFT JOIN biz_quotation q ON q.quotation_id = qi.quotation_id AND q.status = 'submitted'
-    LEFT JOIN biz_supplier s ON s.supplier_id = q.supplier_id
+    LEFT JOIN biz_quotation_item qi  ON qi.rfq_item_id = ri.item_id
+    LEFT JOIN biz_quotation q        ON q.quotation_id = qi.quotation_id
+                                    AND q.status IN ('submitted','accepted')
+    LEFT JOIN biz_supplier s         ON s.supplier_id = q.supplier_id
+    LEFT JOIN (
+        SELECT supplier_id,
+               AVG(quality_score)  AS avg_quality,
+               AVG(service_score)  AS avg_service,
+               COUNT(*)            AS eval_count
+        FROM biz_supplier_evaluation
+        GROUP BY supplier_id
+    ) ev ON ev.supplier_id = q.supplier_id
     WHERE ri.rfq_id = #{rfqId}
-    ORDER BY ri.item_id, qi.unit_price
+    ORDER BY ri.item_id, qi.unit_price ASC
   </select>
+
+  <!-- RFQ基本信息 -->
+  <select id="selectRfqInfo" resultType="java.util.HashMap">
+    SELECT rfq_no AS rfqNo, rfq_title AS rfqTitle
+    FROM biz_rfq WHERE rfq_id = #{rfqId}
+  </select>
+
 </mapper>