front end app update

-from flask import render_template
+from flask import Flask, render_template, request
+
+import json
+app = Flask(__name__)
+app.config['UPLOAD_FOLDER'] = 'data/'  # 上传文件的保存目录
+ALLOWED_EXTENSIONS = {'csv'}  # 允许的文件扩展名
+processing_status = {}  # 全局字典用于存储处理状态和统计信息
 
 @app.route('/')
 def upload_form():
     """显示文件上传表单"""
     return render_template('main.html')
+
+@app.route('/waiting/<filename>')
+def waiting_page(filename):
+    """显示等待页面，并传递文件名"""
+    return render_template('waiting.html', filename=filename)
+
+@app.route('/upload-success')
+def upload_success():
+    """文件处理成功页面"""
+    filename = request.args.get('filename')
+    stats = processing_status.get(filename, {}).get('stats', {})
+    return render_template('success.html', stats=stats)
+
+@app.route('/upload-failure')
+def upload_failure():
+    """文件处理失败页面"""
+    filename = request.args.get('filename')
+    stats = processing_status.get(filename, {}).get('stats', {})
+    return render_template('failure.html', stats=stats)
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