fix window corners (now drawn by awesome, not picom) and wrong center bar radius

awesome/src/core/signals.lua

@@ -1,6 +1,7 @@
 -- Awesome Libs
 local awful = require("awful")
 local beautiful = require("beautiful")
+local gears = require("gears")
 
 screen.connect_signal(
     "added",
@@ -22,6 +23,9 @@ client.connect_signal(
         if awesome.startup and not c.size_hints.user_porition and not c.size_hints.program_position then
             awful.placement.no_offscreen(c)
         end
+        c.shape = function(cr, width, height)
+            gears.shape.rounded_rect(cr, width, height, 10)
+        end
     end
 )