add muted_hover token and rework tab strip visuals

crates/theme/src/colors.rs

@@ -24,6 +24,7 @@ pub struct ColorTokens {
     pub secondary: Hsla,
     pub secondary_foreground: Hsla,
     pub muted: Hsla,
+    pub muted_hover: Hsla,
     pub muted_foreground: Hsla,
     pub accent: Hsla,
     pub accent_foreground: Hsla,
@@ -58,6 +59,7 @@ impl ColorTokens {
             secondary: hex(0xf4f4f5),
             secondary_foreground: hex(0x18181b),
             muted: hex(0xf4f4f5),
+            muted_hover: hex(0xe4e4e7),
             muted_foreground: hex(0x71717a),
             accent: hex(0x2563eb),
             accent_foreground: hex(0xffffff),
@@ -91,6 +93,7 @@ impl ColorTokens {
             secondary: hex(0x27272a),
             secondary_foreground: hex(0xfafafa),
             muted: hex(0x27272a),
+            muted_hover: hex(0x3f3f46),
             muted_foreground: hex(0xa1a1aa),
             accent: hex(0x3b82f6),
             accent_foreground: hex(0xffffff),

crates/theme/src/definition.rs

@@ -22,6 +22,7 @@ pub struct ThemeDefinition {
     pub secondary: Option<String>,
     pub secondary_foreground: Option<String>,
     pub muted: Option<String>,
+    pub muted_hover: Option<String>,
     pub muted_foreground: Option<String>,
     pub destructive: Option<String>,
     pub destructive_foreground: Option<String>,
@@ -88,6 +89,10 @@ impl ThemeDefinition {
         parse_hex(self.muted.as_deref()?)
     }
 
+    pub fn muted_hover(&self) -> Option<Hsla> {
+        parse_hex(self.muted_hover.as_deref()?)
+    }
+
     pub fn muted_foreground(&self) -> Option<Hsla> {
         parse_hex(self.muted_foreground.as_deref()?)
     }

crates/theme/src/resolve.rs

@@ -111,6 +111,11 @@ pub(crate) fn resolve(
             base.secondary_foreground,
         ),
         muted: pick(def_color(|d| d.muted()), system_palette.muted, base.muted),
+        muted_hover: pick(
+            def_color(|d| d.muted_hover()),
+            system_palette.muted_hover,
+            base.muted_hover,
+        ),
         muted_foreground: pick(
             def_color(|d| d.muted_foreground()),
             system_palette.muted_foreground,
@@ -601,4 +606,20 @@ mod tests {
         let preset_stated = resolve(&system(ThemeVariant::Dark, palette, None), Some(&def), None);
         assert_eq!(preset_stated.colors.info, hsla(0x0ea5e9));
     }
+
+    #[test]
+    fn muted_hover_follows_the_overlay_chain() {
+        // No platform states a hover wash; a preset or user file is the only
+        // override above the neutral base.
+        let palette = PartialPalette {
+            muted_hover: Some(hsla(0x155e75)),
+            ..PartialPalette::default()
+        };
+        let stated = resolve(&system(ThemeVariant::Dark, palette, None), None, None);
+        assert_eq!(stated.colors.muted_hover, hsla(0x155e75));
+
+        let def = ThemeDefinition::parse_toml("muted_hover = \"#0ea5e9\"\n").unwrap();
+        let preset_stated = resolve(&system(ThemeVariant::Dark, palette, None), Some(&def), None);
+        assert_eq!(preset_stated.colors.muted_hover, hsla(0x0ea5e9));
+    }
 }

crates/theme/src/source/macos.rs

@@ -79,6 +79,7 @@ impl MacosSource {
             secondary: None,
             secondary_foreground: Self::color_to_hsla(&NSColor::secondaryLabelColor()),
             muted: None,
+            muted_hover: None,
             muted_foreground: Self::color_to_hsla(&NSColor::secondaryLabelColor()),
             destructive: Self::color_to_hsla(&NSColor::systemRedColor()),
             success: None,

crates/theme/src/system.rs

@@ -50,9 +50,11 @@ pub struct PartialPalette {
     pub secondary: Option<Hsla>,
     pub secondary_foreground: Option<Hsla>,
     pub muted: Option<Hsla>,
+    /// No platform states a hover wash, presets override it.
+    pub muted_hover: Option<Hsla>,
     pub muted_foreground: Option<Hsla>,
     pub destructive: Option<Hsla>,
-    /// No platform states severity colors; presets override them.
+    /// No platform states severity colors, presets override them.
     pub success: Option<Hsla>,
     pub warning: Option<Hsla>,
     pub info: Option<Hsla>,