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/expr_eval.rs

@@ -381,6 +381,10 @@ impl Parser {
 /// Evaluate a string as an f64 expression.
 /// Returns None on parse error.
 pub fn eval_number(input: &str) -> Option<f64> {
+    // Feet and inches (`2'9"`, `3'`, `9 1/2"`) are lengths, not arithmetic (#937).
+    if input.contains(['\'', '"']) {
+        return crate::entities::common::parse_typed_length(input);
+    }
     let tokens = tokenize(input.trim()).ok()?;
     let mut parser = Parser::new(tokens);
     let result = parser.parse_expr(0).ok()?;