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/clipboard/paste.rs

@@ -0,0 +1,64 @@
+// Paste tool — ribbon definition + CadCommand implementation.
+
+use crate::modules::{IconKind, ModuleEvent, ToolDef};
+
+pub fn tool() -> ToolDef {
+    ToolDef {
+        id: "PASTECLIP",
+        label: "Paste",
+        icon: IconKind::Svg(include_bytes!("../../../../assets/icons/paste.svg")),
+        event: ModuleEvent::Command("PASTECLIP".to_string()),
+    }
+}
+
+// ── CadCommand implementation ─────────────────────────────────────────────
+
+use acadrust::Handle;
+use glam::Vec3;
+
+use crate::command::{CadCommand, CmdResult};
+use crate::scene::model::wire_model::WireModel;
+
+pub struct PasteCommand {
+    /// Wire models of the clipboard entities (used for preview).
+    wires: Vec<WireModel>,
+    /// Centroid of the clipboard entities (offset origin for translation).
+    centroid: Vec3,
+}
+
+impl PasteCommand {
+    pub fn new(wires: Vec<WireModel>, centroid: Vec3) -> Self {
+        Self { wires, centroid }
+    }
+}
+
+impl CadCommand for PasteCommand {
+    fn name(&self) -> &'static str {
+        "PASTECLIP"
+    }
+
+    fn prompt(&self) -> String {
+        "PASTECLIP  Pick insertion point:".into()
+    }
+
+    fn on_point(&mut self, pt: Vec3) -> CmdResult {
+        CmdResult::PasteClipboard { base_pt: pt }
+    }
+
+    fn on_enter(&mut self) -> CmdResult {
+        CmdResult::Cancel
+    }
+
+    fn on_hover_entity(&mut self, _handle: Handle, _pt: Vec3) -> Vec<WireModel> {
+        vec![]
+    }
+
+    fn on_preview_wires(&mut self, pt: Vec3) -> Vec<WireModel> {
+        let delta = pt - self.centroid;
+        self.wires.iter().map(|w| w.translated(delta)).collect()
+    }
+}
+
+
+// ── Autocomplete registry ─────────────────────────────────
+inventory::submit!(crate::command::CommandRegistration { names: &["PASTECLIP", "PC"] });  // PasteCommand