fix: bound the resolved radian rotor angle, not the raw input

The 90 deg physical guard compared the raw cone / uptilt value to 90,
which is only meaningful when the input is in degrees. Under
angle_units=rad a 2.0 rad (~114 deg) angle passed the 2.0 < 90 check and
assembled a plausible RNA for a non-physical geometry. Resolve to radians
first, then bound the magnitude at pi/2, so the 90 deg limit holds whether
the file was rad or deg.

Author: SMI-Lab-Inha

src/pybmodes/io/windio.py

@@ -764,15 +764,19 @@ def _windio_rotor_angles(
     if units == "auto":
         biggest = max(abs(cone), abs(uptilt))
         units = "deg" if biggest > 0.5 else "rad"
-    if max(abs(cone), abs(uptilt)) > 90.0:
+    if units == "deg":
+        cone_rad, uptilt_rad = float(np.radians(cone)), float(np.radians(uptilt))
+    else:
+        cone_rad, uptilt_rad = cone, uptilt
+    # Bound the resolved radian value (not the raw input, whose scale depends
+    # on the unit), so a 90 deg limit holds whether the file was rad or deg.
+    if max(abs(cone_rad), abs(uptilt_rad)) > np.pi / 2:
         raise ValueError(
             f"rotor precone / shaft tilt (cone_angle={cone!r}, uptilt="
-            f"{uptilt!r}) is non-physical in {units}; expected values well "
-            f"under 90 deg."
+            f"{uptilt!r}, units={units}) resolves to more than 90 deg, which "
+            f"is non-physical."
         )
-    if units == "deg":
-        return float(np.radians(cone)), float(np.radians(uptilt))
-    return cone, uptilt
+    return cone_rad, uptilt_rad
 
 
 def _positive_mass(value: Any, what: str) -> float:

tests/test_windio_rna.py

@@ -293,6 +293,20 @@ def test_rna_rejects_nonphysical_angle(tmp_path: pathlib.Path) -> None:
         read_windio_rna(_write(o, tmp_path, "cone_bad.yaml"))
 
 
+def test_rna_rejects_over_90deg_explicit_radians(tmp_path: pathlib.Path) -> None:
+    """The 90 deg physical bound is applied to the resolved radian value, so a
+    2.0 rad (~114 deg) cone under angle_units='rad' is rejected rather than
+    slipping past a raw < 90 comparison (Codex review on #130)."""
+    pytest.importorskip("yaml")
+    from pybmodes.io.windio import read_windio_rna
+
+    o = _base_ontology()
+    o["components"]["hub"]["cone_angle"] = 2.0  # rad (~114 deg), non-physical
+    p = _write(o, tmp_path, "cone_2rad.yaml")
+    with pytest.raises(ValueError, match="non-physical"):
+        read_windio_rna(p, angle_units="rad")
+
+
 @pytest.mark.parametrize("n_bl", [1, 2])
 def test_rna_rejects_one_or_two_bladed_rotor(
     tmp_path: pathlib.Path, n_bl: int