refactor(modules): rename home module to draw, restore first-tab order

The Home tab was already titled "Draw"; rename the module to match:
folder modules/home → modules/draw, HomeModule → DrawModule, id "home"
→ "draw". The inner draw/ command folder is kept (modules::draw::draw).

Update build.rs PRIORITY ("home" → "draw") so the tab returns to the
front of the ribbon; registry.rs regenerates accordingly.

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

src/modules/draw/layers/color.rs

@@ -0,0 +1,13 @@
+// Color tool — ribbon definition.
+
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+#[allow(dead_code)]
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "COLOR",
+        label: "Color",
+        icon: IconKind::Glyph("🎨"),
+        event: ModuleEvent::Command("COLOR".to_string()),
+    }
+}

src/modules/draw/layers/layfrz.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYFRZ",
+        label: "Layer Freeze",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/layfrz.svg")),
+        event: ModuleEvent::Command("LAYFRZ".to_string()),
+    }
+}

src/modules/draw/layers/laylck.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYLCK",
+        label: "Layer Lock",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/laylck.svg")),
+        event: ModuleEvent::Command("LAYLCK".to_string()),
+    }
+}

src/modules/draw/layers/layoff.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYOFF",
+        label: "Layer Off",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/layoff.svg")),
+        event: ModuleEvent::Command("LAYOFF".to_string()),
+    }
+}

src/modules/draw/layers/layon.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYON",
+        label: "Turn All Layers On",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/layon.svg")),
+        event: ModuleEvent::Command("LAYON".to_string()),
+    }
+}

src/modules/draw/layers/laythw.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYTHW",
+        label: "Thaw All Layers",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/laythw.svg")),
+        event: ModuleEvent::Command("LAYTHW".to_string()),
+    }
+}

src/modules/draw/layers/layulk.rs

@@ -0,0 +1,10 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYULK",
+        label: "Layer Unlock",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/layulk.svg")),
+        event: ModuleEvent::Command("LAYULK".to_string()),
+    }
+}

src/modules/draw/layers/make_current.rs

@@ -0,0 +1,12 @@
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYMCUR",
+        label: "Make Current",
+        icon: IconKind::Svg(include_bytes!(
+            "../../../../assets/icons/layers/laymcur.svg"
+        )),
+        event: ModuleEvent::Command("LAYMCUR".to_string()),
+    }
+}

src/modules/draw/layers/match_layer.rs

@@ -0,0 +1,85 @@
+// Match Layer tool — ribbon definition + CadCommand implementation.
+
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYMATCH",
+        label: "Match Layer",
+        icon: IconKind::Svg(include_bytes!(
+            "../../../../assets/icons/layers/laymatch.svg"
+        )),
+        event: ModuleEvent::Command("LAYMATCH".to_string()),
+    }
+}
+
+// ── CadCommand implementation ─────────────────────────────────────────────
+
+use acadrust::Handle;
+use glam::Vec3;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::scene::model::wire_model::WireModel;
+
+pub struct LayMatchCommand {
+    dest_handles: Vec<Handle>,
+}
+
+impl LayMatchCommand {
+    pub fn new(dest: Vec<Handle>) -> Self {
+        Self { dest_handles: dest }
+    }
+}
+
+impl CadCommand for LayMatchCommand {
+    fn name(&self) -> &'static str {
+        "LAYMATCH"
+    }
+
+    fn prompt(&self) -> String {
+        if self.dest_handles.is_empty() {
+            "LAYMATCH  Select objects to change layer:".into()
+        } else {
+            "LAYMATCH  Select source object to match layer from:".into()
+        }
+    }
+
+    fn is_selection_gathering(&self) -> bool {
+        true
+    }
+
+    fn on_selection_complete(&mut self, handles: Vec<Handle>) -> CmdResult {
+        if handles.is_empty() {
+            return CmdResult::NeedPoint;
+        }
+        if self.dest_handles.is_empty() {
+            // Phase 1 complete — store destinations, move to phase 2.
+            self.dest_handles = handles;
+            CmdResult::NeedPoint
+        } else {
+            // Phase 2 complete — first handle is the source object.
+            let src = handles[0];
+            CmdResult::MatchEntityLayer {
+                dest: std::mem::take(&mut self.dest_handles),
+                src,
+            }
+        }
+    }
+
+    fn on_point(&mut self, _pt: Vec3) -> CmdResult {
+        CmdResult::NeedPoint
+    }
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+    fn on_escape(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+    fn on_hover_entity(&mut self, _handle: Handle, _pt: Vec3) -> Vec<WireModel> {
+        vec![]
+    }
+}
+
+
+// ── Autocomplete registry ─────────────────────────────────
+inventory::submit!(crate::command::CommandRegistration { names: &["LAYMATCH", "LAYMCH"] });  // LayMatchCommand

src/modules/draw/layers/mod.rs

@@ -0,0 +1,10 @@
+pub(super) mod color;
+pub(super) mod layfrz;
+pub(super) mod laylck;
+pub(super) mod layoff;
+pub(super) mod layon;
+pub(super) mod laythw;
+pub(super) mod layulk;
+pub(super) mod make_current;
+pub mod match_layer;
+pub(super) mod panel;

src/modules/draw/layers/panel.rs

@@ -0,0 +1,12 @@
+// Layers panel toggle — ribbon definition.
+
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "LAYERS",
+        label: "Layers",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/layers/panel.svg")),
+        event: ModuleEvent::ToggleLayers,
+    }
+}