feat(ai-house): 展示近似房源匹配说明

pages/ai-house/index.vue

@@ -167,6 +167,7 @@
 								<image class="house-image" :src="item.files[0].url" mode="aspectFill"></image>
 								<view class="house-info">
 									<view class="house-title">{{ item.houseTitle }}</view>
+									<view v-if="item.matchReason" class="house-match-reason">{{ item.matchReason }}</view>
 									<view class="house-location">{{ item.address || item.region || item.city || '位置待补充' }}</view>
 									<view class="house-desc">{{ item.extent }}m²|{{ item.toward }}</view>
 									<view class="house-price">{{ item.monthlyRent }}元/月</view>
@@ -714,9 +715,12 @@
 						houseId: item.houseId || `mock-house-${index}`,
 						files: this.normalizeHouseFiles(item)
 					}))
+					const listTitle = data.matchType === 'approximate'
+						? '以下房源比较接近您的要求：'
+						: '为您推荐以下房源：'
 					this.messages.push(
 						this.createMessage('ai', 'list', {
-							content: '为您推荐以下房源：',
+							content: listTitle,
 							houses
 						})
 					)
@@ -1077,6 +1081,17 @@
 		color: #1f2937;
 	}
 
+	.house-match-reason {
+		margin-top: 10rpx;
+		padding: 10rpx 14rpx;
+		border-radius: 10rpx;
+		background: #eef6ff;
+		color: #2f5f9f;
+		font-size: 24rpx;
+		line-height: 1.45;
+		word-break: break-all;
+	}
+
 	.house-location {
 		margin-top: 10rpx;
 		font-size: 24rpx;