fix: feet-inch dynamic input, STRETCH preselection, ribbon title wrap

- Dynamic-input fields take ' and " and read 2'9" / 3' as lengths (#937)
- STRETCH on a selection made by a crossing window stretches through that
  window and goes straight to the base point (#1068)
- STRETCH's crossing-window steps show no coordinate boxes (#657)
- Collapsed ribbon panel titles wrap at words, never mid-word (#920)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/document.rs

@@ -268,6 +268,9 @@ pub(super) struct DocumentTab {
     /// `suspended_cmd` was parked by a transparent command (`'ZOOM`) and is
     /// restored as soon as the transparent one ends.
     pub(super) transparent_resume: bool,
+    /// Model-space corners of the last crossing window drawn with no command
+    /// running: STRETCH on that selection stretches through it (#1068).
+    pub(super) last_crossing_window: Option<([f64; 2], [f64; 2])>,
 }
 
 impl DocumentTab {
@@ -669,6 +672,7 @@ impl DocumentTab {
             plugin_state: HashMap::new(),
             suspended_cmd: None,
             transparent_resume: false,
+            last_crossing_window: None,
         }
     }