feat: 英语描红 字母选择修改

miniprogram/englishPages/letterTracing/letterTracing.json

@@ -10,7 +10,6 @@
         "share-guide-popup": "../../components/share-guide-popup/share-guide-popup",
         "draw-ad": "../../components/draw-ad/draw-ad",
         "preview-footer-actions": "../../components3.0/preview-footer-actions/preview-footer-actions",
-        "toy-icon": "../../toy/icon/icon",
-        "van-icon": "@vant/weapp/icon/index"
+        "toy-icon": "../../toy/icon/icon"
     }
 }

miniprogram/englishPages/letterTracing/letterTracing.less

@@ -80,12 +80,6 @@ page {
     padding-left: 8rpx;
 }
 
-.lt-section-body {
-    display: flex;
-    flex-direction: column;
-    gap: 24rpx;
-}
-
 /* ===== 练习类型 2列卡片网格 (grid-cols-2 gap-4) ===== */
 .lt-mode-grid {
     display: grid;
@@ -191,40 +185,6 @@ page {
     color: @text-selected-btn;
 }
 
-/* ===== 展开/收起按钮（UI 稿 rounded-full bg-surface-container-low） ===== */
-.lt-expand-toggle {
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    gap: 8rpx;
-    padding: 12rpx 32rpx;
-    border-radius: 999rpx;
-    background: #f8f0e0;
-    align-self: center;
-    margin: 16rpx auto 0;
-    transition:
-        background-color 0.2s ease,
-        transform 0.2s ease;
-}
-
-.lt-expand-toggle--hover {
-    background: @bg-card;
-    transform: scale(0.96);
-}
-
-.lt-expand-toggle__text {
-    font-size: 28rpx;
-    font-weight: 500;
-    color: @text-secondary;
-    line-height: 1;
-}
-
-.lt-expand-toggle__icon {
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-}
-
 /* ===== 大小写切换 / 字母分组选择 ===== */
 .lt-chip-row {
     display: flex;

miniprogram/englishPages/letterTracing/letterTracing.ts

@@ -91,8 +91,6 @@ type PageData = CanvasDataState & {
     tripleGroups: { label: string; letters: string[] }[];
     selectedTripleGroupIdx: number;
     letterGrid: string[];
-    letterGridExpanded: boolean;
-    letterGridPreview: string[];
     modeOptions: ReadonlyArray<{ id: string; label: string; desc: string }>;
 };
 
@@ -122,8 +120,6 @@ createPage(
             tripleGroups: TRIPLE_GROUPS,
             selectedTripleGroupIdx: 0,
             letterGrid: LETTERS_PAIRS,
-            letterGridExpanded: false,
-            letterGridPreview: LETTERS_PAIRS.slice(0, 6),
             modeOptions: [...MODES],
         } as unknown as PageData,
 
@@ -242,13 +238,6 @@ createPage(
             }
         },
 
-        /** 展开/收起字母网格 */
-        toggleLetterGrid() {
-            this.setData({
-                letterGridExpanded: !this.data.letterGridExpanded,
-            });
-        },
-
         /** 用户在字母网格中选择了一个字母（item 为 "Aa" 格式，取首字母作为 selectedLetter） */
         onSelectLetter(e: WechatMiniprogram.TouchEvent) {
             const raw = e.currentTarget.dataset.letter as string;

miniprogram/englishPages/letterTracing/letterTracing.wxml

@@ -41,21 +41,7 @@
         <!-- 选择字母（默认字帖模式） -->
         <view wx:if="{{showLetterPicker}}" class="lt-section">
             <text class="lt-section-title">选择字母</text>
-            <view class="lt-section-body">
-                <view class="lt-letter-grid" wx:if="{{!letterGridExpanded}}">
-                    <view
-                        wx:for="{{letterGridPreview}}"
-                        wx:key="*this"
-                        class="lt-letter-cell {{selectedLetterPair === item ? 'lt-letter-cell--active' : ''}}"
-                        data-letter="{{item}}"
-                        hover-class="lt-letter-cell--pressed"
-                        hover-start-time="0"
-                        hover-stay-time="70"
-                        bind:tap="onSelectLetter">
-                        <text class="lt-letter-text">{{item}}</text>
-                    </view>
-                </view>
-                <view class="lt-letter-grid" wx:if="{{letterGridExpanded}}">
+            <view class="lt-letter-grid">
                 <view
                     wx:for="{{letterGrid}}"
                     wx:key="*this"
@@ -68,29 +54,6 @@
                     <text class="lt-letter-text">{{item}}</text>
                 </view>
             </view>
-                <view
-                    class="lt-expand-toggle"
-                    hover-class="lt-expand-toggle--hover"
-                    hover-start-time="0"
-                    hover-stay-time="70"
-                    bind:tap="toggleLetterGrid">
-                    <text class="lt-expand-toggle__text"
-                        >{{letterGridExpanded ? '收起' : '展开全部'}}</text
-                    >
-                    <van-icon
-                        wx:if="{{letterGridExpanded}}"
-                        name="arrow-up"
-                        size="24rpx"
-                        color="#605b50"
-                        custom-class="lt-expand-toggle__icon" />
-                    <van-icon
-                        wx:else
-                        name="arrow-down"
-                        size="24rpx"
-                        color="#605b50"
-                        custom-class="lt-expand-toggle__icon" />
-                </view>
-            </view>
         </view>
 
         <!-- 选择字母组（大小写对照 / 13字母半表模式） -->