feat: dim 'no focus' chip in the window module

When the compositor reports Focus::None the window module used to show
only the viewport tabs — indistinguishable from simply having no title,
and silent about the state where keystrokes go nowhere. A half-alpha
chip in the same box style as the tabs now leads the module. Keyed on
the explicit "(none)" placeholder, not an empty title, so the feed
connecting at startup doesn't flash it.

Co-Authored-By: Claude Fable 5 <[email protected]>

 src/modules.rs | 49 ++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 40 insertions(+), 9 deletions(-)

diff --git a/src/modules.rs b/src/modules.rs
index f4c38b4..5341b60 100644
--- a/src/modules.rs
+++ b/src/modules.rs
@@ -81,6 +81,9 @@ fn stable_text_width(
     live.max(tmpl) + 2.0 * padding
 }
 
+/// Chip text shown by the window module while nothing holds keyboard focus.
+const NO_FOCUS_TEXT: &str = "no focus";
+
 pub struct WindowModule;
 
 impl StatusModule for WindowModule {
@@ -135,17 +138,21 @@ impl StatusModule for WindowModule {
             const TITLE_WIDTH_STEP: f32 = 24.0;
             ((total_w + 2.0 * padding) / TITLE_WIDTH_STEP).ceil() * TITLE_WIDTH_STEP
         } else {
+            // "(none)" is the compositor explicitly reporting Focus::None
+            // (keystrokes go nowhere); an empty title is just the feed not
+            // having connected yet, which must not flash the indicator.
+            let no_focus = title == "(none)";
             let viewport_parsed = parse_viewport_text(viewport);
-            if viewport_parsed.is_empty() {
-                0.0
-            } else {
-                let mut total_w = 0.0;
-                for (col, text) in &viewport_parsed {
-                    let label = Label::new_with_family(font_system, text, font_size, *col, font_family);
-                    total_w += label.w + 2.0 * padding + 4.0;
-                }
-                if total_w > 0.0 { total_w - 4.0 } else { 0.0 }
+            let mut total_w = 0.0;
+            if no_focus {
+                let label = Label::new_with_family(font_system, NO_FOCUS_TEXT, font_size, [0.0, 0.0, 0.0, 1.0], font_family);
+                total_w += label.w + 2.0 * padding + 4.0;
+            }
+            for (col, text) in &viewport_parsed {
+                let label = Label::new_with_family(font_system, text, font_size, *col, font_family);
+                total_w += label.w + 2.0 * padding + 4.0;
             }
+            if total_w > 0.0 { total_w - 4.0 } else { 0.0 }
         }
     }
 
@@ -211,8 +218,32 @@ impl StatusModule for WindowModule {
                 });
             }
         } else {
+            let no_focus = title == "(none)";
             let viewport_parsed = parse_viewport_text(viewport);
             let mut cur_x = x;
+            if no_focus {
+                // Dim chip signalling that no window has keyboard focus —
+                // the state where typing goes nowhere. Same box as the
+                // viewport tabs, half-alpha text, not clickable.
+                let mut dim = normal_color;
+                dim[3] *= 0.5;
+                let label = Label::new_with_family(font_system, NO_FOCUS_TEXT, font_size, dim, font_family);
+                let box_w = label.w + 2.0 * padding;
+                if let Some(color) = box_bg_color {
+                    rounded_boxes.push(RoundedBox {
+                        x: cur_x,
+                        y: 0.0,
+                        w: box_w,
+                        h: bar_h,
+                        radius: status_box_radius,
+                        color,
+                        corners: (false, false, true, true),
+                        border: None,
+                    });
+                }
+                crate::draw_label(text_prims, label, cur_x + padding, centered_text_y(bar_h, font_size));
+                cur_x += box_w + 4.0;
+            }
             for (col, text) in viewport_parsed {
                 let label = Label::new_with_family(font_system, &text, font_size, col, font_family);
                 let box_w = label.w + 2.0 * padding;