feat(workbench): add extensible settings panel with custom sections

Author: Bli-AIk

src/lib.rs

@@ -185,6 +185,9 @@ impl Plugin for WorkbenchPlugin {
 pub trait WorkbenchApp {
     /// Register a custom panel. The panel will be added to the dock layout.
     fn register_panel(&mut self, panel: impl dock::WorkbenchPanel) -> &mut Self;
+
+    /// Register a custom section in the built-in Settings panel.
+    fn register_settings_section(&mut self, section: menu_bar::SettingsSection) -> &mut Self;
 }
 
 impl WorkbenchApp for App {
@@ -196,6 +199,17 @@ impl WorkbenchApp for App {
         tile_state.add_panel(Box::new(panel));
         self
     }
+
+    fn register_settings_section(&mut self, section: menu_bar::SettingsSection) -> &mut Self {
+        let mut tile_state = self
+            .world_mut()
+            .get_resource_mut::<dock::TileLayoutState>()
+            .expect("WorkbenchPlugin must be added before registering settings sections");
+        if let Some(panel) = tile_state.get_panel_mut::<menu_bar::SettingsPanel>("settings") {
+            panel.custom_sections.push(section);
+        }
+        self
+    }
 }
 
 /// Assigns PrimaryEguiContext to the first active, window-targeting camera that

src/menu_bar.rs

@@ -134,6 +134,14 @@ pub fn toolbar_system(
 }
 
 /// Settings panel — displayed as a tab in the tile layout.
+/// A custom section to inject into the Settings panel.
+pub struct SettingsSection {
+    /// Section heading.
+    pub label: String,
+    /// UI rendering callback.
+    pub ui_fn: Box<dyn FnMut(&mut egui::Ui) + Send + Sync>,
+}
+
 pub struct SettingsPanel {
     /// Edited scale value (not yet saved).
     pub edited_scale: f32,
@@ -151,6 +159,8 @@ pub struct SettingsPanel {
     pub edited_font_path: Option<String>,
     /// Set to true when user clicks Save.
     pub save_requested: bool,
+    /// Custom settings sections injected by downstream applications.
+    pub custom_sections: Vec<SettingsSection>,
 }
 
 impl Default for SettingsPanel {
@@ -164,6 +174,7 @@ impl Default for SettingsPanel {
             edited_locale: crate::i18n::Locale::default(),
             edited_font_path: None,
             save_requested: false,
+            custom_sections: Vec::new(),
         }
     }
 }
@@ -546,6 +557,13 @@ fn settings_panel_ui(panel: &mut SettingsPanel, ui: &mut egui::Ui) {
     if ui.button("Save").clicked() {
         panel.save_requested = true;
     }
+
+    // Custom settings sections
+    for section in &mut panel.custom_sections {
+        ui.separator();
+        ui.heading(&section.label);
+        (section.ui_fn)(ui);
+    }
 }
 
 /// Handles key recording for the keybindings panel, extracted to reduce nesting.

src/prelude.rs

@@ -15,7 +15,9 @@ pub use crate::game_view::{
 pub use crate::i18n::{I18n, Locale};
 pub use crate::inspector::InspectorPanel;
 pub use crate::layout::{LayoutMode, LayoutState};
-pub use crate::menu_bar::{CustomMenu, MenuAction, MenuBarExtensions, MenuExtItem};
+pub use crate::menu_bar::{
+    CustomMenu, MenuAction, MenuBarExtensions, MenuExtItem, SettingsSection,
+};
 pub use crate::mode::{EditorMode, GameClock, GameSchedule, ModeController, on_fresh_play};
 pub use crate::theme::{ThemeConfig, ThemePreset, ThemeState};
 pub use crate::undo::{UndoAction, UndoStack};