chore: clear compiler warnings

Remove accidental dead code (unused imports, the superseded paste tool()
helper, a never-read TORIENT handles field, a duplicate let binding, an
unneeded mut) and mark intentional-but-unwired scaffolding with
allow(dead_code): the web-only save_to_bytes, the plugin loadable() probe,
the planned PICK_HIGHLIGHT colours, the DynFieldSpec label, and the layout
ribbon helpers. Native build is now warning-clean apart from the upstream
nom/quick-xml future-incompat notices.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/commands.rs

@@ -1204,7 +1204,7 @@ impl OpenCADStudio {
                     let cam_rot = self.tabs[i].scene.camera.borrow().rotation;
                     let right = cam_rot * glam::Vec3::X;
                     let view_twist = right.y.atan2(right.x) as f64;
-                    let new_cmd = TorientCommand::new(handles, entities, view_twist);
+                    let new_cmd = TorientCommand::new(entities, view_twist);
                     self.command_line.push_info(&new_cmd.prompt());
                     self.tabs[i].active_cmd = Some(Box::new(new_cmd));
                 }

src/app/style_ops.rs

@@ -47,7 +47,7 @@ impl OpenCADStudio {
     /// sorted by name so the `HashMap` backing them renders stably).
     pub(super) fn style_names(&self, kind: StyleKind) -> Vec<String> {
         let doc = &self.tabs[self.active_tab].scene.document;
-        let mut from_objects = |pick: fn(&ObjectType) -> Option<&str>| -> Vec<String> {
+        let from_objects = |pick: fn(&ObjectType) -> Option<&str>| -> Vec<String> {
             let mut v: Vec<String> = doc
                 .objects
                 .values()

src/app/update.rs

@@ -1677,7 +1677,6 @@ impl OpenCADStudio {
                 // buffer to the same submit path so typing a command name (or
                 // an option keyword like "R") and pressing Enter works without
                 // first clicking into the command line (issue #99).
-                let i = self.active_tab;
                 if !self.command_line.input.trim().is_empty() {
                     return self.update(Message::CommandSubmit);
                 }

src/command/mod.rs

@@ -379,6 +379,7 @@ pub enum DynAnchor {
 pub struct DynFieldSpec {
     pub role: DynRole,
     /// Label override; `None` uses the role's default label.
+    #[allow(dead_code)] // dyn-spec framework field; not yet consumed
     pub label: Option<&'static str>,
 }
 

src/io/mod.rs

@@ -361,6 +361,7 @@ pub fn save(doc: &CadDocument, path: &Path) -> Result<(), String> {
 /// `doc.version`). Used by the web build, which hands the bytes to a browser
 /// download instead of writing a path — the byte-buffer counterpart to
 /// [`save_as_version`].
+#[allow(dead_code)] // web/wasm build only; unused in the native target
 pub fn save_to_bytes(
     doc: &CadDocument,
     ext: &str,

src/modules/draw/clipboard/paste.rs

@@ -1,6 +1,6 @@
 // Paste tool — ribbon definition + CadCommand implementation.
 
-use crate::modules::{IconKind, ModuleEvent, ToolDef};
+use crate::modules::IconKind;
 
 /// Shared icon for the Paste button and its dropdown entries.
 pub const ICON: IconKind = IconKind::Svg(include_bytes!("../../../../assets/icons/paste.svg"));
@@ -13,15 +13,6 @@ pub const MENU_ITEMS: &[(&str, &str, IconKind)] = &[
     ("PASTEBLOCK", "Paste as Block", ICON),
 ];
 
-pub fn tool() -> ToolDef {
-    ToolDef {
-        id: "PASTECLIP",
-        label: "Paste",
-        icon: ICON,
-        event: ModuleEvent::Command("PASTECLIP".to_string()),
-    }
-}
-
 // ── CadCommand implementation ─────────────────────────────────────────────
 
 use acadrust::Handle;

src/modules/draw/modify/torient.rs

@@ -9,7 +9,6 @@ use acadrust::Handle;
 use glam::Vec3;
 
 use crate::command::{CadCommand, CmdResult, DynField};
-use crate::modules::{IconKind, ModuleEvent, ToolDef};
 use crate::scene::model::wire_model::WireModel;
 use acadrust::EntityType;
 
@@ -21,16 +20,14 @@ enum Step {
 }
 
 pub struct TorientCommand {
-    handles: Vec<Handle>,
     entities: Vec<(Handle, EntityType)>,
     view_twist: f64,
     step: Step,
 }
 
 impl TorientCommand {
-    pub fn new(handles: Vec<Handle>, entities: Vec<(Handle, EntityType)>, view_twist: f64) -> Self {
+    pub fn new(entities: Vec<(Handle, EntityType)>, view_twist: f64) -> Self {
         Self {
-            handles,
             entities,
             view_twist,
             step: Step::AngleOrFirstPoint,

src/plugin/external.rs

@@ -47,6 +47,7 @@ impl ExternalPlugin {
 
     /// True when the package can be loaded today: compatible API *and* a native
     /// library present for this platform.
+    #[allow(dead_code)] // plugin-host surface (issue #100); not yet wired
     pub fn loadable(&self) -> bool {
         self.api_compatible() && self.lib_present
     }

src/scene/model/wire_model.rs

@@ -79,8 +79,10 @@ impl WireModel {
     pub const WHITE: [f32; 4] = [1.00, 1.00, 1.00, 1.0];
     pub const CYAN: [f32; 4] = [0.25, 0.85, 1.00, 1.0];
     pub const SELECTED: [f32; 4] = [0.15, 0.55, 1.00, 1.0];
-    /// Civil 3D-style object acquisition highlight (structure / catchment hover).
+    /// Object-acquisition highlight (structure / catchment hover); not yet wired.
+    #[allow(dead_code)]
     pub const PICK_HIGHLIGHT: [f32; 4] = [0.95, 0.50, 0.08, 1.0];
+    #[allow(dead_code)]
     pub const PICK_HIGHLIGHT_DIM: [f32; 4] = [0.95, 0.50, 0.08, 0.45];
     /// Sentinel AABB that never rejects any snap query.
     pub const UNBOUNDED_AABB: [f32; 4] = [

src/ui/color_select.rs

@@ -407,7 +407,7 @@ impl<'a> Widget<Message, Theme, Renderer> for Floating<'a> {
         &'b mut self,
         tree: &'b mut widget::Tree,
         layout: Layout<'b>,
-        renderer: &Renderer,
+        _renderer: &Renderer,
         _viewport: &Rectangle,
         translation: Vector,
     ) -> Option<overlay::Element<'b, Message, Theme, Renderer>> {

src/ui/ribbon/mod.rs

@@ -180,11 +180,13 @@ impl Ribbon {
     }
 
     /// Returns the index of the Layout module in the modules list.
+    #[allow(dead_code)] // layout-tab helpers; not yet wired
     pub fn layout_module_index(&self) -> Option<usize> {
         self.modules.iter().position(|m| m.id() == "layout")
     }
 
     /// Returns true if the currently active tab is the Layout module.
+    #[allow(dead_code)]
     pub fn active_is_layout(&self) -> bool {
         self.modules
             .get(self.active)