Format the tree the way the gate asks for it

`cargo fmt --check` is a required step and had drifted across 45 files. Most of
it arrived this week: several operations were written in parallel worktrees and
merged by hand, and a hand-merge resolves conflicts without ever running the
formatter over the result.

No behaviour changes — this is `cargo fmt --all` and nothing else, kept as its
own commit so the next reader can skip it wholesale rather than search it for
one that matters.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ui/dr-ui/src/develop.rs

@@ -206,7 +206,13 @@ impl SegmentationJob {
         // few places in this codebase where not linearising is correct.
         let rgb = rgba
             .chunks_exact(4)
-            .flat_map(|p| [p[0] as f32 / 255.0, p[1] as f32 / 255.0, p[2] as f32 / 255.0])
+            .flat_map(|p| {
+                [
+                    p[0] as f32 / 255.0,
+                    p[1] as f32 / 255.0,
+                    p[2] as f32 / 255.0,
+                ]
+            })
             .collect();
         Ok((rgb, pw as usize, ph as usize))
     }
@@ -1458,10 +1464,7 @@ impl DevelopSession {
 
     /// What kind of mask a layer is — "regions", "linear", "radial".
     pub fn mask_kind(&self, id: &str) -> &'static str {
-        self.graph
-            .masks()
-            .get(id)
-            .map_or("", |l| l.source.kind())
+        self.graph.masks().get(id).map_or("", |l| l.source.kind())
     }
 
     pub fn mask_inverted(&self, id: &str) -> bool {
@@ -1625,7 +1628,11 @@ impl DevelopSession {
                 width: 0.3,
             }
         };
-        if !self.graph.masks_mut().push(MaskLayer::new(id.clone(), source)) {
+        if !self
+            .graph
+            .masks_mut()
+            .push(MaskLayer::new(id.clone(), source))
+        {
             return None;
         }
         self.active_mask = Some(id.clone());
@@ -1660,7 +1667,8 @@ impl DevelopSession {
     pub fn set_mask_feather(&mut self, id: &str, feather: f32) {
         if let Some(layer) = self.graph.masks_mut().get_mut(id) {
             layer.feather = feather.clamp(0.0, 1.0);
-            self.history.record(&self.graph, Edit::Op(OpId("mask-feather")));
+            self.history
+                .record(&self.graph, Edit::Op(OpId("mask-feather")));
         }
     }
 
@@ -1694,7 +1702,8 @@ impl DevelopSession {
     pub fn set_mask_morph_radius(&mut self, id: &str, radius: f32) {
         if let Some(layer) = self.graph.masks_mut().get_mut(id) {
             layer.morph_radius = radius.clamp(0.0, 1.0);
-            self.history.record(&self.graph, Edit::Op(OpId("mask-morph")));
+            self.history
+                .record(&self.graph, Edit::Op(OpId("mask-morph")));
         }
     }
 
@@ -1702,7 +1711,10 @@ impl DevelopSession {
     pub fn mask_falloff(&self, id: &str) -> usize {
         use dr_pipeline::mask::Falloff;
         self.graph.masks().get(id).map_or(0, |l| {
-            Falloff::ALL.iter().position(|&f| f == l.falloff).unwrap_or(0)
+            Falloff::ALL
+                .iter()
+                .position(|&f| f == l.falloff)
+                .unwrap_or(0)
         })
     }
 
@@ -1732,7 +1744,10 @@ impl DevelopSession {
     pub fn mask_is_shapeable(&self, id: &str) -> bool {
         use dr_pipeline::mask::MaskSource;
         self.graph.masks().get(id).is_some_and(|l| {
-            matches!(l.source, MaskSource::Subject { .. } | MaskSource::Regions { .. })
+            matches!(
+                l.source,
+                MaskSource::Subject { .. } | MaskSource::Regions { .. }
+            )
         })
     }
 
@@ -1742,7 +1757,8 @@ impl DevelopSession {
             // `Op` rather than `Discrete`: opacity is dragged, and a drag is
             // one decision however many values it passes through. `Discrete`
             // would put every intermediate position on the undo stack.
-            self.history.record(&self.graph, Edit::Op(OpId("mask-opacity")));
+            self.history
+                .record(&self.graph, Edit::Op(OpId("mask-opacity")));
         }
     }
 
@@ -2510,9 +2526,8 @@ mod tests {
     fn a_job_carries_the_session_it_was_taken_from() {
         let Some(ctx) = headless() else { return };
         let rgba: Vec<u8> = (0..16 * 16).flat_map(|_| [128, 128, 128, 255]).collect();
-        let session =
-            DevelopSession::open_rgb(&ctx, &rgba, 16, 16, dr_types::Orientation::NORMAL)
-                .expect("session");
+        let session = DevelopSession::open_rgb(&ctx, &rgba, 16, 16, dr_types::Orientation::NORMAL)
+            .expect("session");
         assert_eq!(session.segmentation_job().session(), session.id());
     }
 
@@ -2523,9 +2538,8 @@ mod tests {
     fn an_abandoned_job_does_no_work() {
         let Some(ctx) = headless() else { return };
         let rgba: Vec<u8> = (0..16 * 16).flat_map(|_| [128, 128, 128, 255]).collect();
-        let session =
-            DevelopSession::open_rgb(&ctx, &rgba, 16, 16, dr_types::Orientation::NORMAL)
-                .expect("session");
+        let session = DevelopSession::open_rgb(&ctx, &rgba, 16, 16, dr_types::Orientation::NORMAL)
+            .expect("session");
 
         let job = session.segmentation_job();
         job.abandon().now();
@@ -3993,7 +4007,10 @@ mod tests {
         let narrowed = session.rows().len();
 
         assert!(narrowed > 0, "a tab must show something");
-        assert!(narrowed < all, "and less than everything: {narrowed} of {all}");
+        assert!(
+            narrowed < all,
+            "and less than everything: {narrowed} of {all}"
+        );
     }
 
     /// The trap: `op_index` counts over *every* capability, so a row that
@@ -4054,7 +4071,6 @@ mod tests {
         session.set_active_tab(99);
         assert_eq!(session.rows().len(), all);
     }
-
 }
 
 /// `dr_pipeline`'s morphology, as `dr_segment` names it.