refactor: split every monolithic module into focused submodules

Each source file that had grown beyond a single concern is replaced by an identically-named directory containing focused submodules. `src/event_loop/mod.rs` (878 lines) becomes a directory with clipboard, context_menu, cursor_shape, drag, focus, handlers, invalidation, overlays_reconcile, repeat, run, surface, text_editing, and tooltip. Every widget, input handler, and theme component follows the same split. Public interfaces are unchanged — only the internal file layout moves.
image bumped from 0.25.2 to 0.25.9.

src/input/pointer/helpers.rs

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: LGPL-2.1-only
+// Copyright (C) 2026 Liberux Labs, S. L. <info@liberux.net>
+
+use crate::app::App;
+use crate::event_loop::{ AppData, SurfaceFocus };
+use crate::tree::find_handlers;
+
+use super::super::gesture::SwipeConfig;
+
+/// Pointer-side helpers on `AppData`. Split out so touch can call the
+/// same swipe-config factory; `apply_*` helpers live in `dispatch.rs`
+/// because they are shared.
+impl<A: App> AppData<A>
+{
+	/// Snapshot the swipe thresholds + surface dimensions into a
+	/// [`SwipeConfig`] for the gesture machine. Called once per
+	/// motion / release event.
+	pub( crate ) fn swipe_config( &self, focus: SurfaceFocus ) -> SwipeConfig
+	{
+		let ss = self.surface( focus );
+		SwipeConfig
+		{
+			up_thresh:         self.app.swipe_threshold(),
+			down_thresh:       self.app.swipe_down_threshold(),
+			down_edge:         self.app.swipe_down_edge(),
+			horizontal_thresh: self.app.swipe_horizontal_threshold(),
+			surface_width:     ss.physical_width(),
+			surface_height:    ss.physical_height(),
+		}
+	}
+}
+
+pub( crate ) fn hover_affects_paint<Msg: Clone>(
+	widget_rects: &[crate::widget::LaidOutWidget<Msg>],
+	idx:          Option<usize>,
+) -> bool
+{
+	idx.and_then( |i| find_handlers( widget_rects, i ) )
+		.map( |h| !h.is_slider() )
+		.unwrap_or( false )
+}