feat(数据可视化技术): 添加网店运营大屏前端和后端基础结构

- 新建前端项目配置文件和样式文件
- 创建后端 Flask 应用和数据库连接管理器
- 定义多个 API 路由以获取销售数据

数据可视化技术/网店运营大屏（Flask框架）/frontend/js/totalControl.js

@@ -0,0 +1,32 @@
+function total_control(){
+    var title_index=0;
+    var time_div=document.getElementById("currentTime");
+    function start(){
+    	function getTimeString(){
+			var time=new Date();
+			var hour=time.getHours();
+			var minute=time.getMinutes();
+			var second=time.getSeconds();
+			var year=time.getFullYear();
+			var month=time.getMonth()+1;
+			var day=time.getDate();
+			var week=time.getDay();
+			var weeks=["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"]
+//			console.log(time)
+			hour=hour<10?'0'+hour:hour;
+			minute=minute<10?'0'+minute:minute;
+			second=second<10?'0'+second:second;
+			day=day<10?'0'+day:day;
+			var currentweek=weeks[week];
+			return year+'年'+month+'月'+day+'日'+' '+currentweek+' '+hour+':'+minute+':'+second;
+		}   
+        time_div.innerText=getTimeString();
+    }	
+   	setInterval(start);
+    window.onload=function(){
+    		
+	}
+	window.onresize=function(){
+		location.reload(true);   				
+	}
+};