yoda: iced_winit dead-code purge (29→0 warnings)

Removed code paths inherited from past refactors that no longer have any
reader:

- ViewFn type alias (window.rs)
- a11y_enabled flag and resized flag (lib.rs) — assigned but never read
- BootConfig.fonts/graphics_settings/is_wayland — already passed to
  run_instance(...) directly; the BootConfig copies were never read
- Runner.system_theme oneshot::Sender — stored but no producer ever
  wired; receiver side already falls back to default
- event_loop/control_flow.rs — local ControlFlow enum, all callers use
  winit::event_loop::ControlFlow
- event_loop/proxy.rs — Proxy<Message> never constructed
- Error::Connect(ConnectError) variant — never constructed
- Common.has_focus / ime_pos / ime_size — never read after assignment
- SctkPopupData.grab — replicated settings.grab, never read back
- SubsurfaceEventVariant::Created.surface field — destructure does
  `surface: _` everywhere, the value is unused

Visibility tightening:
- a11y.rs WinitActivationHandler / WinitActionHandler /
  WinitDeactivationHandler: pub proxy → pub(crate) proxy
- conversion::touch_event: pub → private (no external callers)
- proxy::Proxy:🆕 pub → pub(crate)

Allow attributes (intentional, not warning-suppression):
- conversion::RawImage: #[allow(dead_code)] — fields kept for
  IconProvider downcast-via-AsAny on winit's side
- event_loop::Error: #[allow(dead_code)] — variant payloads kept for
  Debug, never inspected programmatically
- lib.rs Event<Message>: #[allow(hidden_glob_reexports)] — intentional
  shadow of winit::event::Event coming from `pub use winit`
- window.rs/lib.rs: #[allow(deprecated)] on enable_ime/disable_ime/
  process_event with TODOs for set_ime_* → request_ime_update and
  try_next → try_recv migrations

Five orphan imports also removed (Hash/Hasher, BorrowMut, 3× Compositor).

Leyoda 2026 – GPLv3

winit/src/platform_specific/wayland/event_loop/state.rs

@@ -33,7 +33,7 @@ use std::{
 };
 use wayland_backend::client::ObjectId;
 use winit::{
-    dpi::{LogicalPosition, LogicalSize},
+    dpi::LogicalSize,
     platform::wayland::WindowExtWayland,
 };
 
@@ -229,9 +229,6 @@ impl CommonSurface {
 #[derive(Debug, Clone)]
 pub struct Common {
     pub(crate) fractional_scale: Option<f64>,
-    pub(crate) has_focus: bool,
-    pub(crate) ime_pos: LogicalPosition<u32>,
-    pub(crate) ime_size: LogicalSize<u32>,
     pub(crate) size: LogicalSize<u32>,
     pub(crate) requested_size: (Option<u32>, Option<u32>),
     pub(crate) wp_viewport: Option<WpViewport>,
@@ -241,9 +238,6 @@ impl Default for Common {
     fn default() -> Self {
         Self {
             fractional_scale: Default::default(),
-            has_focus: Default::default(),
-            ime_pos: Default::default(),
-            ime_size: Default::default(),
             size: LogicalSize::new(1, 1),
             requested_size: (None, None),
             wp_viewport: None,
@@ -336,7 +330,6 @@ pub struct SctkPopupData {
     pub(crate) parent: PopupParent,
     pub(crate) toplevel: WlSurface,
     pub(crate) positioner: Arc<XdgPositioner>,
-    pub(crate) grab: bool,
 }
 
 #[derive(Debug)]
@@ -877,7 +870,6 @@ impl SctkState {
                 parent: parent.clone(),
                 toplevel: toplevel.clone(),
                 positioner: positioner.clone(),
-                grab: settings.grab,
             },
             last_configure: None,
             _pending_requests: Default::default(),
@@ -1519,7 +1511,6 @@ impl SctkState {
                             SctkEvent::SubsurfaceEvent (crate::sctk_event::SubsurfaceEventVariant::Created{
                                 parent_id,
                                 parent,
-                                surface: subsurface,
                                 qh: self.queue_handle.clone(),
                                 common_surface,
                                 surface_id: subsurface_settings.id,