fix(editor): prevent empty text commit from advancing command edit_count

- Propagates commit status out of inline editors so commands know whether a real change occurred.

- Fixes TEXTEDIT's Undo step rolling back unrelated document actions when the user presses OK on empty/cleared existing MText.

src/app/mtext_editor.rs

@@ -628,15 +628,15 @@ impl super::OpenCADStudio {
     }
 
     /// Commit the editor — create a new MText or update the edited one.
-    pub(super) fn mtext_commit(&mut self) {
+    pub(super) fn mtext_commit(&mut self) -> bool {
         let i = self.active_tab;
-        let Some(ed) = self.mtext_editor.take() else { return };
+        let Some(ed) = self.mtext_editor.take() else { return false };
         let body_empty = ed.content.text().trim().is_empty();
         let mt = ed.build_mtext();
         if body_empty {
             // Empty content: drop a new entity; leave an edited one untouched.
             self.refresh_properties();
-            return;
+            return false;
         }
         if let Some(h) = ed.editing {
             self.push_undo_snapshot(i, "MTEXT");
@@ -666,6 +666,7 @@ impl super::OpenCADStudio {
             self.tabs[i].dirty = true;
         }
         self.refresh_properties();
+        true
     }
 
     /// Discard the editor without changing the drawing.

src/app/text_inline.rs

@@ -194,12 +194,12 @@ impl super::OpenCADStudio {
 
     /// Commit the editor: create a new TEXT entity or update the edited slot.
     /// Empty content drops a new entity and leaves an edited one untouched.
-    pub(super) fn text_inline_commit(&mut self) {
+    pub(super) fn text_inline_commit(&mut self) -> bool {
         let i = self.active_tab;
-        let Some(ed) = self.text_inline.take() else { return };
+        let Some(ed) = self.text_inline.take() else { return false };
         if ed.value.trim().is_empty() && ed.editing.is_none() {
             self.refresh_properties();
-            return;
+            return false;
         }
         if let Some(h) = ed.editing {
             self.push_undo_snapshot(i, "TEXT");
@@ -230,6 +230,7 @@ impl super::OpenCADStudio {
             self.tabs[i].dirty = true;
         }
         self.refresh_properties();
+        true
     }
 
     /// Discard the editor without changing the drawing.

src/app/update.rs

@@ -4693,8 +4693,8 @@ impl OpenCADStudio {
                 Task::none()
             }
             Message::MTextOk => {
-                self.mtext_commit();
-                self.post_editor_closed(true)
+                let committed = self.mtext_commit();
+                self.post_editor_closed(committed)
             }
             Message::MTextCancel => {
                 self.mtext_cancel();
@@ -4708,8 +4708,8 @@ impl OpenCADStudio {
                 Task::none()
             }
             Message::TextInlineOk => {
-                self.text_inline_commit();
-                self.post_editor_closed(true)
+                let committed = self.text_inline_commit();
+                self.post_editor_closed(committed)
             }
 
             Message::DrawOrderSubmenuToggle => {