fix Wayland layer-shell protocol violation: "must ack the initial configure before attaching buffer

[FreddyFunk]

This bug caused a Wayland layer-shell protocol violation: "must ack the initial configure before attaching buffer" which occurres when rapidly creating and destroying layer surfaces and I discovered this while working on pop-os/cosmic-settings#1554 and pop-os/cosmic-osd#151 .

Root Cause

The issue was a violation of the Wayland layer-shell protocol requirement that states configure events must be acknowledged before any buffers can be attached.
https://wayland.app/protocols/wlr-layer-shell-unstable-v1

"any attempts by a client to attach or manipulate a buffer prior to the first layer_surface.configure call must also be treated as errors"
"when a configure event is received, if a client commits the surface in response to the configure event, then the client must make an ack_configure request sometime before the commit request"

The bug had two parts:

1. Premature frame marking (event_loop/state.rs:1060): When a layer surface was created, receive_frame() was called immediately, marking the surface with FrameStatus::Received and indicating it was ready to draw.
2. Early redraw request (handlers/shell/layer.rs:45): configure handler was calling request_redraw() before the configure event was fully processed.

This meant layer surfaces could attempt to attach buffers before their first configure event was acknowledged, violating the protocol.

Solution

Part 1: Delay frame readiness until first configure

• Removed the premature receive_frame() call when layer surfaces are created
• Added receive_frame() to the configure handler, only after the configure is fully processed
• This ensures layer surfaces are not marked as drawable until they've received and processed their first configure event

Part 2: Ensure configure processing happens before redraw

• Moved request_redraw() to after all configure processing (viewport update, size setting, etc)
• Added proper borrow handling by cloning wl_surface before calling request_redraw()