Split crates/wayland/src/winit.rs (889 lines) into winit/

Pure reorganization, no behavior change - verified by diffing the
function-name and struct-name sets before/after (both identical) plus
a full cargo test pass. mod.rs keeps the module doc comment, imports,
WaylandPlatform's struct definition, and TARGET_FRAME_TIME, plus mod
declarations. The rest splits by concern:

- connect.rs: connect(), the ~200-line setup/init function.
- run.rs: accept_clients, pump_winit - the small per-poll pair.
- render.rs: render_frame, the per-frame render loop (left as one
  intact ~330-line function, same reasoning as udev's render.rs: its
  structure is deliberate and already documented inline, not a target
  for further decomposition in a pure reorganization pass).
- capture.rs: capture_offscreen, the screencopy path.
- events.rs: handle_winit_event.
- platform.rs: `impl Platform for WaylandPlatform`.

No tests module existed in the original file, so none was split out.

A handful of methods/functions (accept_clients, pump_winit,
render_frame, capture_offscreen, handle_winit_event) went from private
to pub(super): called across what are now sibling submodules, which
Rust's privacy model doesn't let see each other's private items.

1 files changed, 26 insertions, 0 deletions

diff --git a/crates/wayland/src/winit/run.rs b/crates/wayland/src/winit/run.rs
new file mode 100644
index 0000000..ed7c4c3
--- /dev/null
+++ b/crates/wayland/src/winit/run.rs
@@ -0,0 +1,26 @@
+use super::*;
+use super::events::handle_winit_event;
+
+impl WaylandPlatform {
+
+    pub(super) fn accept_clients(&mut self) -> PlatformResult<()> {
+        if let Some(stream) = self.listener.accept().map_err(err)? {
+            let client = self.display.handle().insert_client(stream, std::sync::Arc::new(ClientState::default())).map_err(err)?;
+            self.clients.push(client);
+        }
+        Ok(())
+    }
+
+    pub(super) fn pump_winit(&mut self) -> PlatformResult<bool> {
+        let mut closed = false;
+        let state = &mut self.state;
+        let output = &self.output;
+        let pump = self.winit_events.dispatch_new_events(|event| {
+            handle_winit_event(state, output, event, &mut closed);
+        });
+        if matches!(pump, PumpStatus::Exit(_)) {
+            closed = true;
+        }
+        Ok(closed)
+    }
+}