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/widget/dialog/tests.rs

@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: LGPL-2.1-only
+// Copyright (C) 2026 Liberux Labs, S. L. <info@liberux.net>
+
+use super::*;
+use crate::layout::spacer::spacer;
+
+#[ derive( Clone, Debug, PartialEq, Eq ) ]
+enum Msg { Cancel, Dismiss }
+
+#[ test ]
+fn new_defaults_are_modal_with_no_content()
+{
+	let d = Dialog::<Msg>::new();
+	assert!( d.modal );
+	assert!( d.title.is_none() );
+	assert!( d.subtitle.is_none() );
+	assert!( d.body.is_none() );
+	assert!( d.actions.is_empty() );
+	assert!( d.dismiss_msg.is_none() );
+	assert!( d.cancel_msg.is_none() );
+	assert_eq!( d.max_width, DEFAULT_MAX_WIDTH );
+}
+
+#[ test ]
+fn title_and_subtitle_builders_set_strings()
+{
+	let d = Dialog::<Msg>::new()
+		.title( "Hello" )
+		.subtitle( "World" );
+	assert_eq!( d.title.as_deref(),    Some( "Hello" ) );
+	assert_eq!( d.subtitle.as_deref(), Some( "World" ) );
+}
+
+#[ test ]
+fn body_builder_replaces_existing_body()
+{
+	let d = Dialog::<Msg>::new()
+		.body( spacer() )
+		.body( spacer() );
+	assert!( d.body.is_some() );
+}
+
+#[ test ]
+fn action_builder_appends_in_order()
+{
+	let d = Dialog::<Msg>::new()
+		.action( spacer() )
+		.action( spacer() )
+		.action( spacer() );
+	assert_eq!( d.actions.len(), 3 );
+}
+
+#[ test ]
+fn modal_builder_toggles_flag()
+{
+	assert!( !Dialog::<Msg>::new().modal( false ).modal );
+	assert!(  Dialog::<Msg>::new().modal( true  ).modal );
+}
+
+#[ test ]
+fn dismiss_on_scrim_builder_records_message()
+{
+	let d = Dialog::<Msg>::new()
+		.modal( false )
+		.dismiss_on_scrim( Msg::Dismiss );
+	assert_eq!( d.dismiss_msg, Some( Msg::Dismiss ) );
+}
+
+#[ test ]
+fn cancel_builder_records_escape_message()
+{
+	let d = Dialog::<Msg>::new().cancel( Msg::Cancel );
+	assert_eq!( d.cancel_msg, Some( Msg::Cancel ) );
+}
+
+#[ test ]
+fn max_width_builder_overrides_default()
+{
+	let d = Dialog::<Msg>::new().max_width( 720.0 );
+	assert_eq!( d.max_width, 720.0 );
+}
+
+#[ test ]
+#[ should_panic( expected = "dismiss_on_scrim is not valid when modal=true" ) ]
+fn modal_with_dismiss_panics_at_lower()
+{
+	// Construction allows the combination; only the lowering
+	// to `Element` enforces the contract — that is where the
+	// invariant matters because that is where input dispatch
+	// would have to honour two contradictory rules.
+	let d = Dialog::<Msg>::new()
+		.modal( true )
+		.dismiss_on_scrim( Msg::Dismiss );
+	let _: Element<Msg> = d.into();
+}
+
+#[ test ]
+fn non_modal_with_dismiss_lowers_cleanly()
+{
+	let d = Dialog::<Msg>::new()
+		.modal( false )
+		.dismiss_on_scrim( Msg::Dismiss )
+		.cancel( Msg::Cancel )
+		.title( "Title" );
+	// Lowering must not panic.
+	let _: Element<Msg> = d.into();
+}
+
+#[ test ]
+fn modal_with_cancel_only_lowers_cleanly()
+{
+	// modal=true + cancel(...) (no dismiss_on_scrim) is the
+	// canonical confirm-dialog shape.
+	let d = Dialog::<Msg>::new()
+		.title( "Confirm" )
+		.subtitle( "Are you sure?" )
+		.cancel( Msg::Cancel );
+	let _: Element<Msg> = d.into();
+}