Refine shell surfaces, spacing, and Ferese symbol

shell/ferese-shell/assets/icons/ferese.svg

@@ -1,4 +1,5 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.4" stroke-linecap="round" stroke-linejoin="round">
-  <path d="M7 20V6a2 2 0 0 1 2-2h10M7 11.5h9"/>
-  <path d="M4 20h3"/>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200" role="img" aria-label="Ferese symbol: tiled F">
+  <rect x="20" y="20" width="50" height="160" rx="8" fill="currentColor"/>
+  <rect x="80" y="20" width="100" height="55" rx="8" fill="currentColor"/>
+  <rect x="80" y="95" width="70" height="45" rx="8" fill="currentColor"/>
 </svg>

shell/ferese-shell/src/config.rs

@@ -72,7 +72,7 @@ impl Default for ShellTheme {
             shadow: [0, 0, 0, 85],
             bar_height: 28.0,
             bar_margin_top: 0,
-            bar_window_gap: 8,
+            bar_window_gap: 0,
             bar_margin_horizontal: 0,
             bar_radius: 0.0,
             material_radius: 14.0,
@@ -415,7 +415,7 @@ const fn default_bar_height() -> f32 {
     28.0
 }
 const fn default_bar_window_gap() -> i32 {
-    8
+    0
 }
 const fn default_bar_margin_top() -> i32 {
     0

shell/ferese-shell/src/status_ui.rs

@@ -599,13 +599,8 @@ impl FereseShell {
                 text_color: Some(primary),
                 icon_color: Some(primary),
                 border: Border {
-                    color: if compositor_material {
-                        Color::TRANSPARENT
-                    } else {
-                        color_with_opacity(theme.border, p * 0.6)
-                    },
-                    width: 1.0,
                     radius: theme.material_radius.into(),
+                    ..Default::default()
                 },
                 // Iced's shadow fills the silhouette behind the quad. With
                 // transparent client content that fill remains visible over