fix(mini-user): 门店套餐图片自适应完整显示，不再裁剪

- ProductCarousel 新增 imageFit="adaptive"（widthFix + 动态高度）
- 门店套餐详情按图片真实比例自适应高度，完整显示不裁剪
- 补充 v3.4.18 文档 F 项

Co-Authored-By: WorkBuddy <workbuddy@tencent.com>

apps/mini-user/src/components/ProductCarousel.tsx

@@ -1,4 +1,4 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
 import { View, Image, Swiper, SwiperItem } from '@tarojs/components';
 import Taro from '@tarojs/taro';
 
@@ -7,8 +7,12 @@ type ProductCarouselProps = {
   alt: string;
   variant?: 'home' | 'detail' | 'store';
   previewable?: boolean;
-  /** cover=aspectFill 裁剪铺满；contain=aspectFit 缩放完整显示（门店门头固定区） */
-  imageFit?: 'cover' | 'contain';
+  /**
+   * cover=aspectFill 裁剪铺满（固定高度，可能裁切）
+   * contain=aspectFit 完整显示（固定高度，可能留白）
+   * adaptive=widthFix 按图片真实比例自适应高度，完整显示不裁剪（门店套餐详情用）
+   */
+  imageFit?: 'cover' | 'contain' | 'adaptive';
 };
 
 /** 商品/门店轮播（对齐 h5 ProductCarousel 三变体） */
@@ -21,10 +25,55 @@ export default function ProductCarousel({
 }: ProductCarouselProps) {
   const slides = images.length > 0 ? images : [''];
   const [activeIndex, setActiveIndex] = useState(0);
+  // adaptive 模式：实测容器宽度与各图渲染高度
+  const [wrapWidth, setWrapWidth] = useState(0);
+  const [imgHeights, setImgHeights] = useState<number[]>([]);
   const prefix =
     variant === 'store' ? 'store-detail-carousel' : variant === 'home' ? 'home-carousel' : 'detail-carousel';
   const isContain = imageFit === 'contain';
-  const wrapClass = `${prefix}-wrap${isContain ? ` ${prefix}-wrap--contain` : ''}`;
+  const isAdaptive = imageFit === 'adaptive';
+  const wrapClass = `${prefix}-wrap${isContain ? ` ${prefix}-wrap--contain` : ''}${isAdaptive ? ` ${prefix}-wrap--adaptive` : ''}`;
+
+  function getWindowWidth(): number {
+    try {
+      const info = (Taro as any).getWindowInfo?.() ?? Taro.getSystemInfoSync();
+      return info?.windowWidth || 375;
+    } catch {
+      return 375;
+    }
+  }
+
+  useEffect(() => {
+    if (!isAdaptive) return;
+    const query = Taro.createSelectorQuery();
+    query
+      .select(`.${prefix}-wrap--adaptive`)
+      .boundingClientRect((rect: { width?: number }) => {
+        if (rect && rect.width) setWrapWidth(rect.width);
+        else setWrapWidth(getWindowWidth());
+      })
+      .exec();
+    // 仅挂载时测量一次容器宽度（页面宽度稳定）
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [isAdaptive, prefix]);
+
+  function handleImageLoad(index: number, e: any) {
+    const detail = e?.detail;
+    const naturalW = detail?.width;
+    const naturalH = detail?.height;
+    if (!naturalW || !naturalH) return;
+    const w = wrapWidth || getWindowWidth();
+    const h = Math.round((naturalH / naturalW) * w);
+    setImgHeights((prev) => {
+      const next = [...prev];
+      next[index] = h;
+      return next;
+    });
+  }
+
+  // adaptive：随当前幻灯片高度变化；未加载时给一个 3:4 兜底高度
+  const adaptiveHeight = imgHeights[activeIndex] || Math.round((wrapWidth || getWindowWidth()) * 0.75);
+  const swiperStyle = isAdaptive ? { height: `${adaptiveHeight}px` } : undefined;
 
   function previewAt(index: number) {
     const urls = slides.filter(Boolean);
@@ -37,6 +86,7 @@ export default function ProductCarousel({
     <View className={wrapClass}>
       <Swiper
         className={prefix}
+        style={swiperStyle}
         circular={slides.length > 1}
         {...(variant === 'detail' && slides.length > 1 ? { autoplay: true, interval: 3500 } : {})}
         onChange={(e) => setActiveIndex(e.detail.current)}
@@ -47,8 +97,9 @@ export default function ProductCarousel({
               <Image
                 className={`${prefix}-image`}
                 src={src}
-                mode={isContain ? 'aspectFit' : 'aspectFill'}
+                mode={isAdaptive ? 'widthFix' : isContain ? 'aspectFit' : 'aspectFill'}
                 alt={alt}
+                onLoad={isAdaptive ? (e) => handleImageLoad(index, e) : undefined}
                 onClick={previewable ? () => previewAt(index) : undefined}
               />
             ) : (