Fix a real regression: dynamic-mode windows lost their shadow via toggle_floating

The tiled-shadow-tint fix earlier today gated the shadow on Window::floating
alone. arrange_workspace only reads floating under the "tiling" layout, so
every window on this project's own default "dynamic" layout starts, and
stays, floating: false - the gate misread that as "tiled, no shadow"
regardless of which layout was actually running, so shadows silently
vanished under dynamic mode entirely, recoverable only by pressing Super+S
(toggle_floating), which then looked like that key toggles a tint rather
than floating. Fixed by checking the workspace's own layout name first:
a window is only "currently tiled" when its workspace runs "tiling" AND
it hasn't opted out via floating. DecorationSignature's floating field is
now currently_tiled, since a layout switch changes this for every window
on a workspace without touching any of their own floating fields.

Also disabled general.shadows in the user's own config per direct
request - never asked for, on by default, and a real problem for
color-accuracy work regardless of how correctly it renders otherwise.

Also fixed both context menus (titlebar and desktop) silently truncating
labels past a fixed 170px width with no indication - widened dynamically
to each menu's own real widest label via a new measure_text_width helper.

1 files changed, 12 insertions, 0 deletions

diff --git a/crates/wayland/src/decoration/font.rs b/crates/wayland/src/decoration/font.rs
index 27df347..6a2a312 100644
--- a/crates/wayland/src/decoration/font.rs
+++ b/crates/wayland/src/decoration/font.rs
@@ -19,6 +19,18 @@ pub(crate) fn find_system_font() -> Option<Font> {
     FONT.get_or_init(load_any_monospace_font).clone()
 }
 
+/// The real rendered pixel width of `text` at `size`, in this font - the
+/// same two-pass "sum every glyph's own advance width" measurement `render_
+/// header_box`'s `draw_centered` already does inline, pulled out here so a
+/// caller that needs to *size a box* around text (not just draw it) has one
+/// place to ask, rather than repeating the sum. Returns `0.0` with no
+/// system font found, matching every other text-rendering path's own
+/// "solid colour only, no text at all" fallback in that case.
+pub(crate) fn measure_text_width(font: &Option<Font>, text: &str, size: f32) -> f32 {
+    let Some(font) = font else { return 0.0 };
+    text.chars().filter(|c| !c.is_control()).map(|ch| font.rasterize(ch, size).0.advance_width).sum()
+}
+
 fn load_any_monospace_font() -> Option<Font> {
     let roots = ["/usr/share/fonts", "/usr/local/share/fonts"];
     let mut home_roots = Vec::new();