feat(text): in-place editors for all text entities

Route every text-bearing entity to an in-place editor instead of the
command line: a plain text box for single-line text (Text, attributes,
dimension override, tolerance) and the rich MText editor for MText /
MultiLeader. A Leader resolves to the entity it annotates.

- TEXT places a plain text box at the click; double-click edits in place.
- DDEDIT and double-click on any text entity open the matching editor.
- MLEADER places the leader then opens the MText editor on its content.
- LEADER follows the classic flow: points, Enter, then a linked empty
  MText annotation opens in the editor; the leader's annotation_handle
  links the pair so they edit/erase as a unit.

Adds shared field read/write helpers and a begin_text_edit router, plus
CommitAndEditText / CommitManyAndEditText results that commit an entity
and open its editor (commit_entity now returns the new handle).

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

src/modules/annotate/text.rs

@@ -1,6 +1,3 @@
-use acadrust::types::Vector3;
-use acadrust::{EntityType, Text};
-
 use crate::command::{CadCommand, CmdResult};
 use crate::modules::{IconKind, ModuleEvent, ToolDef};
 use crate::scene::wire_model::WireModel;
@@ -19,7 +16,6 @@ pub fn tool() -> ToolDef {
 
 enum Step {
     InsertPoint,
-    WaitText(Vec3),
 }
 
 pub struct TextCommand {
@@ -42,16 +38,17 @@ impl CadCommand for TextCommand {
     fn prompt(&self) -> String {
         match &self.step {
             Step::InsertPoint => "TEXT  Specify insertion point:".into(),
-            Step::WaitText(pos) => format!(
-                "TEXT  Type text, press Enter  [at {:.2},{:.2}]:",
-                pos.x, pos.z
-            ),
         }
     }
 
     fn on_point(&mut self, pt: Vec3) -> CmdResult {
-        self.step = Step::WaitText(pt);
-        CmdResult::NeedPoint
+        // Hand off to the in-place plain-text editor anchored at the click.
+        CmdResult::OpenTextEditor {
+            pos: pt,
+            handle: None,
+            initial: String::new(),
+            height: 0.25,
+        }
     }
 
     fn on_enter(&mut self) -> CmdResult {
@@ -61,27 +58,6 @@ impl CadCommand for TextCommand {
         CmdResult::Cancel
     }
 
-    fn wants_text_input(&self) -> bool {
-        matches!(self.step, Step::WaitText(_))
-    }
-
-    fn wants_text_with_spaces(&self) -> bool {
-        matches!(self.step, Step::WaitText(_))
-    }
-
-    fn on_text_input(&mut self, text: &str) -> Option<CmdResult> {
-        if let Step::WaitText(pos) = &self.step {
-            if text.trim().is_empty() {
-                return Some(CmdResult::Cancel);
-            }
-            let t = Text::with_value(text, Vector3::new(pos.x as f64, pos.y as f64, pos.z as f64))
-                .with_height(0.25);
-            Some(CmdResult::CommitEntity(EntityType::Text(t)))
-        } else {
-            None
-        }
-    }
-
     fn on_mouse_move(&mut self, _pt: Vec3) -> Option<WireModel> {
         None
     }