feat: 批量检测支持上传TXT文件

- 新增文件选择功能，支持TXT格式
- 自动读取文件内容并逐行拆解
- 显示已选文件名和文本条数
- 保留手动输入方式作为备选

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

miniprogram/pages/batch/index.js

@@ -3,6 +3,8 @@ const { request } = require('../../utils/request')
 Page({
   data: {
     inputText: '',
+    fileName: '',
+    lineCount: 0,
     loading: false,
     summary: null,
     items: []
@@ -24,6 +26,43 @@ Page({
       .filter((line) => line.length >= 2)
   },
 
+  chooseFile() {
+    wx.chooseMessageFile({
+      count: 1,
+      type: 'file',
+      extension: ['txt'],
+      success: (res) => {
+        const file = res.tempFiles[0]
+        const fs = wx.getFileSystemManager()
+
+        try {
+          const content = fs.readFileSync(file.path, 'utf8')
+          const lines = content
+            .split('\n')
+            .map((line) => line.trim())
+            .filter((line) => line.length >= 2)
+
+          this.setData({
+            inputText: lines.join('\n'),
+            fileName: file.name,
+            lineCount: lines.length
+          })
+
+          wx.showToast({ title: `已读取 ${lines.length} 条文本`, icon: 'success' })
+        } catch (err) {
+          console.error('读取文件失败', err)
+          wx.showToast({ title: '文件读取失败', icon: 'none' })
+        }
+      },
+      fail: (err) => {
+        console.error('选择文件失败', err)
+        if (err.errMsg !== 'chooseMessageFile:fail cancel') {
+          wx.showToast({ title: '请选择TXT文件', icon: 'none' })
+        }
+      }
+    })
+  },
+
   async submit() {
     if (this.data.loading) return
     const items = this.parseLines()

miniprogram/pages/batch/index.wxml

@@ -2,17 +2,37 @@
   <view class="hero fade-up">
     <view class="hero-badge">BATCH SCAN</view>
     <view class="hero-title">批量文本筛查</view>
-    <view class="hero-sub">每行一条文本，适用于活动文案、客服话术、私信模板的集中检测。</view>
+    <view class="hero-sub">上传TXT文件或手动输入，每行一条文本，系统自动逐行检测。</view>
   </view>
 
   <view class="card fade-up fade-up-delay-1">
-    <view class="card-title">批量输入</view>
+    <view class="card-title">上传文件</view>
-    <view class="card-desc">请按“每行一条”粘贴文本内容，系统会自动跳过空行。</view>
+    <view class="card-desc">支持TXT文本文件，每行一条待检测内容。</view>
+
+    <view class="btn-row">
+      <button class="btn btn-primary" bindtap="chooseFile">选择TXT文件</button>
+    </view>
+
+    <view class="field" wx:if="{{fileName}}">
+      <view class="row">
+        <text class="label">已选文件</text>
+        <text class="value">{{fileName}}</text>
+      </view>
+      <view class="row">
+        <text class="label">文本条数</text>
+        <text class="value">{{lineCount}} 条</text>
+      </view>
+    </view>
+  </view>
+
+  <view class="card fade-up fade-up-delay-1">
+    <view class="card-title">手动输入</view>
+    <view class="card-desc">或直接粘贴文本内容，每行一条。</view>
     <textarea class="textarea" placeholder="示例：&#10;点击链接领取红包&#10;今天下午三点开会" value="{{inputText}}" bindinput="onInput" />
 
     <view class="btn-row">
       <button class="btn btn-ghost" bindtap="fillDemo">填充示例</button>
-      <button class="btn btn-primary" loading="{{loading}}" bindtap="submit">开始识别</button>
+      <button class="btn btn-accent" loading="{{loading}}" bindtap="submit">开始识别</button>
     </view>
   </view>
 
@@ -85,4 +105,4 @@
       </view>
     </view>
   </view>
-</view>
+</view>