聊天室添加ui，websocket连接/断开功能拓展

parts/scenes/history.lua

@@ -1,25 +1,6 @@
 local gc=love.graphics
 local max,min=math.max,math.min
 
-local floatWheel=0
-local function wheelScroll(y)
-	if y>0 then
-		if floatWheel<0 then floatWheel=0 end
-		floatWheel=floatWheel+y^1.2
-	elseif y<0 then
-		if floatWheel>0 then floatWheel=0 end
-		floatWheel=floatWheel-(-y)^1.2
-	end
-	while floatWheel>=1 do
-		love.keypressed("up")
-		floatWheel=floatWheel-1
-	end
-	while floatWheel<=-1 do
-		love.keypressed("down")
-		floatWheel=floatWheel+1
-	end
-end
-
 local scene={}
 
 function scene.sceneInit()