feat(faces): the TUI draws axis, wizard-field, mode and minibuffer colours through face_style (improvise-nn4s.2)

axis_fg, minibuf_fg, field_kind_fg and mode_style are gone, and AxisColor
leaves improvise-core. The category-add prompt turns green, ADR 004
clause 8's one declared exception.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze

crates/improvise-core/src/view/axis.rs

@@ -12,17 +12,6 @@ pub enum Axis {
     None,
 }
 
-/// Accent color for an axis. Semantic palette only; `draw.rs::axis_fg` maps
-/// each variant to a terminal color, so `Axis` names no ratatui type.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum AxisColor {
-    Row,
-    Column,
-    Page,
-    Filter,
-    Inactive,
-}
-
 impl Axis {
     /// The next axis in the Row → Column → Page → None → Row rotation.
     /// `Filter` is outside it and cycling one is a no-op (improvise-dz8).
@@ -48,17 +37,6 @@ impl Axis {
         !matches!(self, Axis::Filter)
     }
 
-    /// Accent color. The single source for axis coloring: the tile bar and the
-    /// category panel each carried a copy before (improvise-rml).
-    pub fn color(self) -> AxisColor {
-        match self {
-            Axis::Row => AxisColor::Row,
-            Axis::Column => AxisColor::Column,
-            Axis::Page => AxisColor::Page,
-            Axis::Filter => AxisColor::Filter,
-            Axis::None => AxisColor::Inactive,
-        }
-    }
 
     /// Name with no decoration: "Row", "Col", "Page", "None".
     pub fn plain_label(self) -> &'static str {
@@ -176,15 +154,4 @@ mod tests {
         assert!(!Axis::Column.filters_data());
         assert!(!Axis::None.filters_data());
     }
-
-    /// A collision defeats the only reason `AxisColor` exists.
-    #[test]
-    fn every_axis_gets_its_own_color() {
-        let colors = ALL.map(Axis::color);
-        for (i, a) in colors.iter().enumerate() {
-            for b in &colors[i + 1..] {
-                assert_ne!(a, b, "two axes share an accent color");
-            }
-        }
-    }
 }

crates/improvise-core/src/view/mod.rs

@@ -2,7 +2,7 @@ pub mod axis;
 pub mod layout;
 pub mod types;
 
-pub use axis::{Axis, AxisColor};
+pub use axis::Axis;
 pub use layout::{
     AxisEntry, GridEval, GridLayout, NEW_CATEGORY_COL, NEW_MEASURE_COL, RecordCol, RecordRow,
     ViewStep, drill_constraint, drill_snapshot, drill_steps, record_row, records_spine,

crates/improvise-protocol/src/face.rs

@@ -575,6 +575,18 @@ mod tests {
         }
     }
 
+    /// A collision defeats the reason the axis faces exist (improvise-rml).
+    #[test]
+    fn every_axis_gets_its_own_accent_in_the_shipped_theme() {
+        let theme = Theme::shipped();
+        let accents = AXES.map(|axis| theme.resolve(Face::Axis(axis)));
+        for (i, a) in accents.iter().enumerate() {
+            for b in &accents[i + 1..] {
+                assert_ne!(a, b, "two axes share an accent");
+            }
+        }
+    }
+
     /// A child overrides what it states and inherits what it does not, from
     /// the nearest ancestor that states it — `context/test-evidence/protocol.md`.
     #[test]

crates/improvise-protocol/src/lib.rs

@@ -396,7 +396,7 @@ impl AppMode {
             minibuf: MinibufferConfig {
                 buffer_key: "category".into(),
                 prompt: "new category: ".into(),
-                color: MinibufColor::Yellow,
+                color: MinibufColor::Green,
             },
         }
     }

crates/improvise-wasm-client/src/render.rs

@@ -75,8 +75,8 @@ pub struct RenderModel {
 pub struct RenderMinibuffer {
     pub prompt: String,
     pub value: String,
-    /// Semantic, as `MinibufColor` is: the last translation to a CSS class is
-    /// the page's, exactly as `draw.rs::minibuf_fg` is the TUI's (gotcha 26).
+    /// A colour, not a role: the TUI now draws a face per text-entry mode, and
+    /// improvise-nn4s.4 moves the page onto the same faces (ADR 004).
     pub color: improvise_protocol::MinibufColor,
 }