yoda: iced_winit unreachable + deprecation cleanup (45→29 warnings)

- conversion.rs: drop 4 duplicate Interaction arms (Cell/Move/Copy/Help)
  that were already handled higher in the same match — pure dead code
  from a past merge, not a real bug.
- platform_specific/wayland/mod.rs: migrate HasRawDisplayHandle →
  HasDisplayHandle (display_handle().map(|h| h.as_raw())).
- conversion.rs: #[allow(deprecated)] on key_code/winit_key_code — the
  warning suggests Meta but no Meta variant exists in this enum
  (only MetaLeft/MetaRight, which aren't equivalent to Super).
- window.rs: #[allow(deprecated)] on enable_ime/disable_ime with TODO
  to migrate set_ime_* → request_ime_update(ImeRequest::*).
- lib.rs: #[allow(deprecated)] on process_event with TODO to migrate
  try_next → try_recv (futures-channel API change).

Leyoda 2026 – GPLv3

winit/src/platform_specific/wayland/mod.rs

@@ -18,8 +18,7 @@ use cursor_icon::CursorIcon;
 use iced_futures::futures::channel::mpsc;
 use iced_graphics::{Compositor, compositor};
 use iced_runtime::core::{Vector, window};
-use raw_window_handle::{HasDisplayHandle, HasWindowHandle};
-use raw_window_handle::{HasRawDisplayHandle, RawWindowHandle};
+use raw_window_handle::{HasDisplayHandle, HasWindowHandle, RawWindowHandle};
 use sctk_event::SctkEvent;
 use std::{collections::HashMap, sync::Arc};
 use subsurface_widget::{SubsurfaceInstance, SubsurfaceState};
@@ -106,7 +105,7 @@ impl PlatformSpecific {
         display: OwnedDisplayHandle,
     ) -> Self {
         self.wayland.winit_event_sender = Some(tx);
-        self.wayland.conn = match display.raw_display_handle() {
+        self.wayland.conn = match display.display_handle().map(|h| h.as_raw()) {
             Ok(raw_window_handle::RawDisplayHandle::Wayland(
                 wayland_display_handle,
             )) => {