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/data/sales_manager.csv

@@ -0,0 +1,7 @@
+sales_manager,sales,profit
+郝杰,502667.277,55300.637
+江奕健,179421.48,11725
+姜伟,222300.092,19919.872
+王倩倩,691845.854,92687.014
+杨洪光,761143.054,96180.574
+张怡莲,558296.522,93976.162

数据可视化技术/网店运营大屏（Flask框架）/frontend/data/sales_month.csv

@@ -0,0 +1,13 @@
+month,sales,profit
+1月,226678.83,37233.77
+2月,109855.158,19834.458
+3月,167173.727,18748.247
+4月,96984.692,16501.352
+5月,232199.107,23984.947
+6月,339729.698,39157.118
+7月,140050.918,11800.698
+8月,356128.507,66818.087
+9月,322759.367,24133.207
+10月,289269.169,33635.329
+11月,342142.15,42611.87
+12月,292702.956,35330.176

数据可视化技术/网店运营大屏（Flask框架）/frontend/data/sales_product.json

@@ -0,0 +1,65 @@
+[
+	{
+	"name": "办公用品",
+    "value": 949270.224,
+    "children": [{
+        "name": "标签",
+        "value": 18936.54
+    }, {
+        "name": "美术",
+        "value": 33038.096
+    }, {
+        "name": "器具",
+        "value": 449744.764
+    }, {
+        "name": "收纳具",
+        "value": 214582.2
+    }, {
+        "name": "系固件",
+        "value": 20045.48
+    }, {
+        "name": "信封",
+        "value": 51941.96
+    }, {
+        "name": "用品",
+        "value": 47070.128
+    }, {
+        "name": "纸张",
+        "value": 51413.74
+    },{
+        "name": "装订机",
+        "value": 62497.316
+    }]
+}, {
+    "name": "技术",
+    "value": 937985.552,
+    "children": [{
+        "name": "电话",
+        "value": 330951.32
+    }, {
+        "name": "复印机",
+        "value": 347513.264
+    }, {
+        "name": "配件",
+        "value": 150562.664
+    }, {
+        "name": "设备",
+        "value": 108958.304
+    }]
+},  {
+    "name": "家具",
+    "value": 1028418.503,
+    "children": [{
+        "name": "书架",
+        "value": 366969.54
+    }, {
+        "name": "椅子",
+        "value": 409393.054
+    }, {
+        "name": "用具",
+        "value": 83848.996
+    }, {
+        "name": "桌子",
+        "value": 168206.913
+    }]
+}]

数据可视化技术/网店运营大屏（Flask框架）/frontend/data/sales_province.csv

@@ -0,0 +1,31 @@
+province,sales,profit
+安徽,113742.734,32222.834
+北京,76154.54,19854.24
+福建,102315.08,32774.7
+甘肃,47267.444,-13210.036
+广东,254769.725,58887.605
+广西,48349.532,14036.932
+贵州,15893.136,287.616
+海南,10995.88,4132.94
+河北,227145.8,43675.38
+河南,79220.54,17722.6
+黑龙江,273877.632,66982.132
+湖北,135006.9,-33492.34
+湖南,163503.277,31399.277
+吉林,76539.617,17712.317
+江苏,128183.776,-16801.764
+江西,29987.86,7944.72
+辽宁,152250.028,-29393.812
+内蒙古,59787.252,-15047.368
+宁夏,12685.988,-900.592
+山东,192400.46,49812.56
+山西,99782.9,25386.9
+陕西,102767.168,21152.628
+上海,99893.584,17668.784
+四川,60567.584,-9514.876
+天津,95426.03,20107.01
+西藏,1144.92,400.26
+新疆,16700.88,4683
+云南,79432.052,16937.032
+浙江,94619.56,-27441.26
+重庆,65262.4,11809.84

数据可视化技术/网店运营大屏（Flask框架）/frontend/data/sales_region.csv

@@ -0,0 +1,7 @@
+region,sales,profit
+东北,502667.277,55300.637
+华北,558296.522,93976.162
+华东,761143.054,96180.574
+西北,179421.48,11725
+西南,222300.092,19919.872
+中南,691845.854,92687.014