When computers sends packets to the server, how the wifi AP manages
It really does not. A WAP is a bridge, like a switch, and it bridges frames. Unlike an ethernet switch, which is a transparent bridge (all interfaces are the same layer-2 protocol), a WAP is a translating bridge that translates Wi-Fi frames to ethernet frames, and vice versa.
Based on your comments, you do not seem to understand that any frames sent to that MAC address will arrive on that switch interface, regardless of whether or not the switch has the MAC address in its MAC address table.
Switches will flood unknown unicast MAC addresses (those not in its MAC address table) to every switch interface A frame sent by Host2 will ...
You should note that CSMA/CD is all but obsolete. It was used with (repeater) hubs and half-duplex links and only for 10 and 100 Mbit/s. Modern networks are switched throughout and use full duplex. Gigabit speed is practically considered a given.
In packet-switched networks, all data is broken down into packets which are then transferred from source to ...
I have L2 switches which will be daisy chained together (yes I know,
daisy chaining isn't great, but anyway..) The L2 switches will then
link to a L3 switch.
Both the L2 and L3 switches have x4 10GbE SFP+ ports.
Something like this?
+------+ +------+ +------+
| L2 |SFP+----SFP+| L2 |SFP+----SFP+| L3 |SFP+-----Server with SFP+