LR-CROP-ASPECT: forget a remembered ratio the crop command refuses

A bad remembered value (a hand-edited settings file) made begin_crop fail,
which cancelled every crop drag on an untouched photo for good. Now the value
is dropped with a status message and the drag goes ahead. Regression test in
tests_masking.rs.

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

crates/ui-egui/src/lib.rs

@@ -478,8 +478,12 @@ impl LightcraftApp {
             && self.session.active().and_then(|id| self.session.develop_of(id)).is_some_and(|d| d.crop == lightcraft_develop::Crop::default())
             && let Some(aspect) = self.ui.crop_default_aspect.clone()
             && aspect != serde_json::json!("free")
+            && let Err(e) = self.session.execute("crop.aspect", &serde_json::json!({"aspect": aspect}))
         {
-            self.session.execute("crop.aspect", &serde_json::json!({"aspect": aspect})).map_err(|e| e.to_string())?;
+            // A remembered value the command refuses (a hand-edited settings file) would refuse
+            // every crop drag on an untouched photo: forget it and let this drag go ahead.
+            self.ui.crop_default_aspect = None;
+            self.ui.status = e.to_string();
         }
         Ok(())
     }

crates/ui-egui/src/tests_masking.rs

@@ -468,6 +468,28 @@ fn crop_drag_activates_the_remembered_ratio_and_undo_restores_the_photo() {
     assert_eq!(develop(&h), before);
 }
 
+/// A remembered ratio the crop command refuses (a hand-edited settings file) is forgotten, and the
+/// drag still crops: it must not block every crop of an untouched photo.
+#[test]
+fn a_bad_remembered_ratio_is_dropped_and_the_drag_still_crops() {
+    let mut h = detail("panel.crop");
+    h.app.ui.crop_default_aspect = Some(json!([0, -3]));
+    h.settle(SETTLE);
+    let before = develop(&h);
+    // a rotating drag outside the box (any crop drag starts cropping); the release on its own
+    for events in [
+        json!([{"kind": "down", "x": -0.05, "y": 0.2}, {"kind": "drag", "x": -0.05, "y": 0.25}, {"kind": "drag", "x": -0.05, "y": 0.3}]),
+        json!([{"kind": "up", "x": -0.05, "y": 0.3}]),
+    ] {
+        let r = h.request("ui.pointer", json!({ "events": events }), T);
+        assert_eq!(r["ok"], true, "{r}");
+        h.settle(SETTLE);
+    }
+    assert_eq!(h.app.ui.crop_default_aspect, None, "the bad value is forgotten");
+    assert_ne!(develop(&h).crop, before.crop, "the drag cropped");
+    assert_eq!(develop(&h).crop.aspect, None);
+}
+
 #[test]
 fn double_click_in_crop_box_applies_the_crop() {
     let mut h = detail("panel.crop");