refactor(egui): rename "layers" to "appearance panel"

crates/topola-egui/src/appearance_panel.rs

@@ -1,6 +1,6 @@
 use topola::board::{mesadata::AccessMesadata, Board};
 
-pub struct Layers {
+pub struct AppearancePanel {
     // TODO:
     // In1.Cu shall be #7fc87f (#d5ecd5 when selected).
     // In2.Cu shall be #ce7d2c (#e8c39e when selected).
@@ -9,7 +9,7 @@ pub struct Layers {
     pub highlight_colors: Box<[egui::Color32]>,
 }
 
-impl Layers {
+impl AppearancePanel {
     pub fn new(board: &Board<impl AccessMesadata>) -> Self {
         let layer_count = board.layout().drawing().layer_count();
         let visible = std::iter::repeat(true)

crates/topola-egui/src/main.rs

@@ -3,9 +3,9 @@
 mod action;
 mod actions;
 mod app;
+mod appearance_panel;
 mod config;
 mod error_dialog;
-mod layers;
 mod menu_bar;
 mod overlay;
 mod painter;

crates/topola-egui/src/workspace.rs

@@ -14,12 +14,14 @@ use topola::{
     stepper::Step,
 };
 
-use crate::{error_dialog::ErrorDialog, layers::Layers, overlay::Overlay, translator::Translator};
+use crate::{
+    error_dialog::ErrorDialog, layers::AppearancePanel, overlay::Overlay, translator::Translator,
+};
 
 /// A loaded design and associated structures
 pub struct Workspace {
     pub design: SpecctraDesign,
-    pub layers: Layers,
+    pub layers: AppearancePanel,
     pub overlay: Overlay,
     pub interactor: Interactor<SpecctraMesadata>,
 
@@ -32,7 +34,7 @@ pub struct Workspace {
 impl Workspace {
     pub fn new(design: SpecctraDesign, tr: &Translator) -> Result<Self, String> {
         let board = design.make_board(&mut LayoutEdit::new());
-        let layers = Layers::new(&board);
+        let layers = AppearancePanel::new(&board);
         let overlay = Overlay::new(&board).map_err(|err| {
             format!(
                 "{}; {}",