Update to v2.6.5 without release

- Change something to make that purchase things can have some cores.
- Fix the download link of Arcaea client in README

> This is a small update.

latest version/web/index.py

@@ -847,6 +847,7 @@ def change_purchase_item():
             purchase_name = request.form['purchase_name']
             item_id = request.form['item_id']
             item_type = request.form['type']
+            amount = int(request.form['amount'])
         except:
             error = '数据错误 Wrong data.'
             flash(error)
@@ -862,8 +863,8 @@ def change_purchase_item():
                     c.execute(
                         '''select exists(select * from item where item_id=? and type=?)''', (item_id, item_type))
                     if c.fetchone() == (1,):
-                        c.execute('''insert into purchase_item values(?,?,?)''',
-                                  (purchase_name, item_id, item_type))
+                        c.execute('''insert into purchase_item values(?,?,?,?)''',
+                                  (purchase_name, item_id, item_type, amount))
                         flash('''购买项目的物品添加成功 Successfully add the purchase's item.''')
                     else:
                         error = '''物品不存在 The item does not exist.'''

latest version/web/system.py

@@ -301,7 +301,7 @@ def get_all_purchase():
                 items = []
                 if y:
                     for j in y:
-                        items.append({'item_id': j[1], 'type': j[2]})
+                        items.append({'item_id': j[1], 'type': j[2], 'amount':j[3]})
 
                 re.append({'purchase_name': i[0],
                            'price': i[1],