refactor(bar): GroupingConfig.transparency_alpha has one spelling in render.rs

The two render.rs differed in two places. The Windows bar documented transparency_alpha with '(default: 200)' in its text; the macOS bar documented it without and put the default into the schema (schemars extend default 200), so the macOS nix options file gets default = 200. The macOS spelling is taken for both, because a change to the macOS schema.bar.json would also change the generated nix/komorebi-bar-options.nix, which cannot be regenerated here. Windows: the description loses the '(default: 200)' text and the property gains "default": 200 (reviewed diff of schema.bar.json below, pin updated in tests/schema_oracle.rs); the one comment on RenderConfig that only Windows had ('/// Render configuration') is added to the macOS copy. The two render.rs are then byte-identical.

The schema diff is the two lines of the property: description 'Alpha value for the color transparency [[0-255]] (default: 200)' -> 'Alpha value for the color transparency [[0-255]]', and one added "default": 200. macOS schema.bar.json is untouched (its harness regeneration is byte-identical).

Verified: Windows cargo clippy --workspace --locked --all-targets -D warnings clean; macOS fake-CC cargo check --locked --workspace --all-targets finished, 0 errors; native cargo test -p komorebi-bar-core: 3 unit + 2 oracle passed, 0 failed; harness regeneration: macOS byte-identical (3,774 lines), Windows byte-identical to the updated schema.bar.json (9,091 lines, diff exactly the two lines above). Not verified: rendering.

crates/komorebi-bar-core/tests/schema_oracle.rs

@@ -21,9 +21,9 @@ struct Pin {
 const PINS: [Pin; 2] = [
     Pin {
         file: "schema.bar.json",
-        lines: 9_090,
-        bytes: 248_529,
-        fnv1a: 0x5573_0134_1968_bff9,
+        lines: 9_091,
+        bytes: 248_540,
+        fnv1a: 0x83d6_6fd4_9ae8_3766,
     },
     Pin {
         file: "komorebi-for-mac/schema.bar.json",

komorebi-bar/src/render.rs

@@ -367,7 +367,8 @@ impl RenderConfig {
 pub struct GroupingConfig {
     /// Styles for the grouping
     pub style: Option<GroupingStyle>,
-    /// Alpha value for the color transparency [[0-255]] (default: 200)
+    /// Alpha value for the color transparency [[0-255]]
+    #[cfg_attr(feature = "schemars", schemars(extend("default" = 200)))]
     pub transparency_alpha: Option<u8>,
     /// Rounding values for the 4 corners. Can be a single or 4 values.
     pub rounding: Option<RoundingConfig>,

komorebi-for-mac/komorebi-bar/src/render.rs

@@ -44,6 +44,7 @@ pub enum Grouping {
 }
 
 #[derive(Clone)]
+/// Render configuration
 pub struct RenderConfig {
     /// Komorebi monitor index of the monitor on which to render the bar
     pub monitor_idx: usize,

schema.bar.json

@@ -2807,12 +2807,13 @@
           ]
         },
         "transparency_alpha": {
-          "description": "Alpha value for the color transparency [[0-255]] (default: 200)",
+          "description": "Alpha value for the color transparency [[0-255]]",
           "type": [
             "integer",
             "null"
           ],
           "format": "uint8",
+          "default": 200,
           "maximum": 255,
           "minimum": 0
         }