Action matrix regressions of #1255: knuckle rounds, thin holes, a 45° flange hole, an axis after an edit (#1280)

* Action matrix regressions of #1255: knuckle rounds, thin holes, a 45° flange hole, an axis after an edit

- Curve blends: past the end of a curved edge the run of sections along the end
  tangent wrapped round the ring of centres; it is shortened while it still
  crosses the end face (the hinge knuckle's cap rounds at 0.728 mm).
- Boolean retry guard: each body's volume is measured finer than its smallest
  radius, and a volume out of bounds is measured again ten times finer before
  it refuses (a 0.133 mm drill measured -30272 mm³; a plastic part's coarse
  mesh was off by more than the slack).
- Sheet metal: a drill cap's certificate allows the evaluation noise its fitted
  tilt shows (a hole square to a 45° flange).
- Construction geometry on a named face uses the face found by name, not a
  second pick at its nearest point (an axis through a corner round after a
  parameter moved it).

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

* Retry guard: measure the target, tool and result at one tolerance

Measured at different tolerances, the chords' error on the faces they share
didn't cancel: a blind hole in a long D-profile bar measured 20 mm³ more than
the bar.

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

* Action matrix baseline from this branch's full run: 37 actions pass again, none fewer

Blessed with cargo xtask action-matrix --from DIR --bless from the 16 shards of
run 38673859774.

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

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

crates/doc/src/construct.rs

@@ -125,10 +125,15 @@ fn construct<'a>(st: &'a ModelState, name: &str) -> Result<&'a ConstructGeom> {
 
 /// The face picked: (body, face index, point on it).
 fn face_of<'a>(st: &'a ModelState, at: Vec3, name: &Option<String>) -> Result<(&'a ModelBody, usize, Vec3)> {
-    let at = match name.as_deref().and_then(|n| crate::naming::point_on_face(st, n, at)) {
-        Some((q, _)) => q,
-        None => at,
-    };
+    // The named face itself: its nearest point to the old pick can lie on an edge it shares
+    // (a corner round that a parameter moved away from the pick), where picking again by the
+    // point finds the flat face beside it (#1255).
+    if let Some(hit) = name.as_deref().and_then(|n| crate::name_lookup::locate_face(st, n, at))
+        && let Some(b) = st.bodies.get(hit.body).filter(|b| !b.body.is_mesh())
+        && hit.face < b.body.face_count()
+    {
+        return Ok((b, hit.face, hit.point));
+    }
     for b in bodies(st) {
         if let Some(fi) = crate::appearance::face_index_at(b, at) {
             return Ok((b, fi, at));