diff --git a/Cargo.lock b/Cargo.lock
index 1159481f5..fd4345fb1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1191,13 +1191,14 @@ dependencies = [
 [[package]]
 name = "craft-update"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=92d392cff132eaf53e13afff77f38b5c11b73aa0#92d392cff132eaf53e13afff77f38b5c11b73aa0"
+source = "git+https://github.com/storytold/craft-libs?rev=1065653e75854e9c17e1ff563acdd344c1b185f0#1065653e75854e9c17e1ff563acdd344c1b185f0"
 dependencies = [
  "chrono",
  "dunce",
  "egui",
  "flate2",
  "getrandom 0.3.4",
+ "image",
  "log",
  "plist",
  "semver",
diff --git a/Cargo.toml b/Cargo.toml
index 1d4d7c530..220f29403 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -65,7 +65,8 @@ eframe = { version = "0.37", default-features = false }
 egui-wgpu = "0.37"
 # Monotonic time on native and web (performance.now on wasm).
 web-time = "1.1"
-craft-update = { git = "https://github.com/storytold/craft-libs", version = "=0.1.0", rev = "92d392cff132eaf53e13afff77f38b5c11b73aa0", features = ["egui"] }
+# craft-update with storytold/craft-libs#434: the update prompt shows the app's icon, accent and developer.
+craft-update = { git = "https://github.com/storytold/craft-libs", version = "=0.1.0", rev = "1065653e75854e9c17e1ff563acdd344c1b185f0", features = ["egui"] }
 rfd = "0.17"
 arboard = { version = "3.6", default-features = false }
 
diff --git a/apps/cadcraft/src/main.rs b/apps/cadcraft/src/main.rs
index 19546d6ce..4d7bdc39b 100644
--- a/apps/cadcraft/src/main.rs
+++ b/apps/cadcraft/src/main.rs
@@ -218,7 +218,7 @@ fn main() -> eframe::Result {
     let logger = logging::install();
     // The update helper relaunches this binary after a self-update; it runs and exits here.
     #[cfg(not(target_arch = "wasm32"))]
-    if let Some(done) = craft_update::self_update::finish(&craft_update::suite::CADCRAFT, &std::env::args_os().skip(1).collect::<Vec<_>>()) {
+    if let Some(done) = craft_update::self_update::finish(&cadcraft_ui_egui::UPDATE_APP, &std::env::args_os().skip(1).collect::<Vec<_>>()) {
         if let Err(e) = done {
             eprintln!("CADCraft update helper failed: {e}");
             std::process::exit(1);
diff --git a/crates/constraints/src/auto.rs b/crates/constraints/src/auto.rs
index fe7764205..211be6b93 100644
--- a/crates/constraints/src/auto.rs
+++ b/crates/constraints/src/auto.rs
@@ -52,15 +52,11 @@ fn collect(d: &Drawing, handles: &[Handle]) -> Geo {
                     g.curves.push((GeomRef::whole(h), ga.center, a.radius));
                 }
             }
-            EntityKind::Circle(c) => {
-                if c.center.is_finite() && c.radius.is_finite() {
-                    g.curves.push((GeomRef::whole(h), c.center.xy(), c.radius));
-                }
+            EntityKind::Circle(c) if c.center.is_finite() && c.radius.is_finite() => {
+                g.curves.push((GeomRef::whole(h), c.center.xy(), c.radius));
             }
-            EntityKind::Point(p) => {
-                if p.p.is_finite() {
-                    g.points.push((GeomRef::whole(h), p.p.xy()));
-                }
+            EntityKind::Point(p) if p.p.is_finite() => {
+                g.points.push((GeomRef::whole(h), p.p.xy()));
             }
             EntityKind::LwPolyline(p) => {
                 let n = p.vertices.len();
diff --git a/crates/engine/src/audit.rs b/crates/engine/src/audit.rs
index f78de7efe..c055bff25 100644
--- a/crates/engine/src/audit.rs
+++ b/crates/engine/src/audit.rs
@@ -460,17 +460,13 @@ fn references(d: &mut Drawing, out: &mut Vec<Issue>) {
                         m.style = "Standard".into();
                     }
                 }
-                EntityKind::Table(t) => {
-                    if !has_name(&d.table_styles, &t.style, |s| &s.name) {
-                        note("table style", &t.style);
-                        t.style = "Standard".into();
-                    }
+                EntityKind::Table(t) if !has_name(&d.table_styles, &t.style, |s| &s.name) => {
+                    note("table style", &t.style);
+                    t.style = "Standard".into();
                 }
-                EntityKind::Leader(l) => {
-                    if !ok_dim(d, &l.style) {
-                        note("dimension style", &l.style);
-                        l.style = "Standard".into();
-                    }
+                EntityKind::Leader(l) if !ok_dim(d, &l.style) => {
+                    note("dimension style", &l.style);
+                    l.style = "Standard".into();
                 }
                 EntityKind::Dimension(dim) => {
                     if !ok_dim(d, &dim.style) {
diff --git a/crates/engine/src/cmd/inquiry.rs b/crates/engine/src/cmd/inquiry.rs
index c7f59a0cf..0fa342e23 100644
--- a/crates/engine/src/cmd/inquiry.rs
+++ b/crates/engine/src/cmd/inquiry.rs
@@ -840,11 +840,9 @@ impl Interactive for DistM {
                     let model = model_points(&self.sources);
                     s.echo(format!("Distance = {}", fmt_d(s, path_len(model.as_deref().unwrap_or(pts), &self.bulges))));
                 }
-                Input::Keyword(k) if k == "Undo" => {
-                    if pts.len() > 1 {
-                        self.arcs.undo(pts, &mut self.bulges);
-                        self.sources.pop();
-                    }
+                Input::Keyword(k) if k == "Undo" && pts.len() > 1 => {
+                    self.arcs.undo(pts, &mut self.bulges);
+                    self.sources.pop();
                 }
                 Input::Keyword(k) if k == "Length" => self.length = true,
                 Input::Keyword(k) if k == "Total" => return self.total(s, false),
@@ -852,10 +850,8 @@ impl Interactive for DistM {
                     self.arcs.close(pts, &mut self.bulges)?;
                     return self.total(s, true);
                 }
-                Input::Keyword(k) => {
-                    if !self.arcs.keyword(&k, pts) {
-                        s.echo(format!("{k}: not available yet"));
-                    }
+                Input::Keyword(k) if !self.arcs.keyword(&k, pts) => {
+                    s.echo(format!("{k}: not available yet"));
                 }
                 Input::Enter => return self.total(s, false),
                 _ => {}
diff --git a/crates/engine/src/mtext_edit.rs b/crates/engine/src/mtext_edit.rs
index 30da0b897..97ecede6f 100644
--- a/crates/engine/src/mtext_edit.rs
+++ b/crates/engine/src/mtext_edit.rs
@@ -136,11 +136,9 @@ impl Formatted {
                     i += 2;
                     match code {
                         None => {}
-                        Some('P') => {
-                            if f.paras.len() < MAX_PARAS {
-                                f.push_char('\n', &cur);
-                                f.paras.push(props.clone());
-                            }
+                        Some('P') if f.paras.len() < MAX_PARAS => {
+                            f.push_char('\n', &cur);
+                            f.paras.push(props.clone());
                         }
                         Some(c @ ('\\' | '{' | '}')) => f.push_char(c, &cur),
                         Some('L') => cur.underline = true,
diff --git a/crates/geom/src/nurbs.rs b/crates/geom/src/nurbs.rs
index 5268203b1..104ba8d3c 100644
--- a/crates/geom/src/nurbs.rs
+++ b/crates/geom/src/nurbs.rs
@@ -487,7 +487,7 @@ impl Spline {
 
     /// Arc length between parameters `a` and `b` (adaptive Gauss–Legendre over each knot span).
     pub fn length_between(&self, a: f64, b: f64) -> f64 {
-        if !self.is_valid() || !(a.is_finite() && b.is_finite()) {
+        if !(self.is_valid() && a.is_finite() && b.is_finite()) {
             return 0.0;
         }
         let (lo, hi) = self.domain();
diff --git a/crates/io/src/dxf_raw.rs b/crates/io/src/dxf_raw.rs
index 0154b01d3..9b755f80f 100644
--- a/crates/io/src/dxf_raw.rs
+++ b/crates/io/src/dxf_raw.rs
@@ -135,10 +135,8 @@ fn head(tags: &[Tag]) -> Head {
                 h.has_reactors |= group.as_deref() == Some("ACAD_REACTORS");
             }
             (_, Some("ACAD_REACTORS")) => h.reactors.push(norm(&t.str())),
-            (_, Some("ACAD_XDICTIONARY")) => {
-                if h.xdict.is_none() {
-                    h.xdict = Some(norm(&t.str()));
-                }
+            (_, Some("ACAD_XDICTIONARY")) if h.xdict.is_none() => {
+                h.xdict = Some(norm(&t.str()));
             }
             (_, Some(_)) => {}
             (5 | 105, None) if h.handle.is_none() => h.handle = Some(norm(&t.str())),
diff --git a/crates/io/src/dxf_read/document.rs b/crates/io/src/dxf_read/document.rs
index 02ea0f532..d732f4450 100644
--- a/crates/io/src/dxf_read/document.rs
+++ b/crates/io/src/dxf_read/document.rs
@@ -35,13 +35,11 @@ pub(super) fn parse_entities(
                 extra = more;
                 kindent = Some((c, k));
             }
-            "INSERT" => {
-                if t.i(66) == Some(1) {
-                    let ins_layer = kindent.as_ref().map(|(c, _)| c.layer.clone()).unwrap_or_default();
-                    let attribs = insert_attribs(recs, &mut i, &ins_layer);
-                    if let Some((_, EntityKind::Insert(ins))) = kindent.as_mut() {
-                        ins.attribs = attribs;
-                    }
+            "INSERT" if t.i(66) == Some(1) => {
+                let ins_layer = kindent.as_ref().map(|(c, _)| c.layer.clone()).unwrap_or_default();
+                let attribs = insert_attribs(recs, &mut i, &ins_layer);
+                if let Some((_, EntityKind::Insert(ins))) = kindent.as_mut() {
+                    ins.attribs = attribs;
                 }
             }
             // A VERTEX or ATTRIB with no POLYLINE or INSERT before it; a stray SEQEND holds nothing.
diff --git a/crates/render/src/text.rs b/crates/render/src/text.rs
index 1f80d7af4..8e692facd 100644
--- a/crates/render/src/text.rs
+++ b/crates/render/src/text.rs
@@ -77,7 +77,7 @@ pub(super) fn mesh(g: &TextGlyph, xf: Mat3, pixel: f64) -> Arc<Mesh> {
     let contours = ttf::glyph_contours(&g.face, g.gid);
     let points = contours.iter().map(Vec::len).try_fold(0usize, usize::checked_add);
     // Font data is untrusted; don't hand unbounded or invalid paths to the tessellator.
-    if !points.is_some_and(|n| n <= MAX_POINTS) || contours.iter().flatten().any(|p| !p.is_finite() || p.x.abs().max(p.y.abs()) > 1.0e6) {
+    if points.is_none_or(|n| n > MAX_POINTS) || contours.iter().flatten().any(|p| !p.is_finite() || p.x.abs().max(p.y.abs()) > 1.0e6) {
         return Arc::new(Mesh { contours: Arc::default(), triangles: Vec::new() });
     }
     let contours = match detail {
diff --git a/crates/ui-egui/src/cmdline.rs b/crates/ui-egui/src/cmdline.rs
index d78561551..9d8bd9821 100644
--- a/crates/ui-egui/src/cmdline.rs
+++ b/crates/ui-egui/src/cmdline.rs
@@ -379,13 +379,11 @@ pub fn keyboard(app: &mut CadApp, ctx: &egui::Context) {
                         app.cmd.buffer.pop();
                     }
                 }
-                Key::ArrowUp if !modifiers.any() => {
-                    if !app.cmd.history.is_empty() {
-                        let n = app.cmd.history.len();
-                        let pos = app.cmd.history_pos.map(|p| p.saturating_sub(1)).unwrap_or(n - 1);
-                        app.cmd.history_pos = Some(pos);
-                        app.cmd.buffer = app.cmd.history.get(pos).cloned().unwrap_or_default();
-                    }
+                Key::ArrowUp if !modifiers.any() && !app.cmd.history.is_empty() => {
+                    let n = app.cmd.history.len();
+                    let pos = app.cmd.history_pos.map(|p| p.saturating_sub(1)).unwrap_or(n - 1);
+                    app.cmd.history_pos = Some(pos);
+                    app.cmd.buffer = app.cmd.history.get(pos).cloned().unwrap_or_default();
                 }
                 Key::ArrowDown if !modifiers.any() => {
                     if !options_key(app, 1)
diff --git a/crates/ui-egui/src/lib.rs b/crates/ui-egui/src/lib.rs
index 22e325cbe..311dd4cbf 100644
--- a/crates/ui-egui/src/lib.rs
+++ b/crates/ui-egui/src/lib.rs
@@ -8,6 +8,15 @@
 #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]
 #![forbid(unsafe_code)]
 
+/// CADCraft as craft-update knows it, with its 128 px icon and accent colour: the update
+/// prompt shows both, and an AppImage's menu entry gets the icon.
+#[cfg(not(target_arch = "wasm32"))]
+pub const UPDATE_APP: craft_update::app::App = craft_update::app::App {
+    icon_png: Some(include_bytes!("../../../assets/app-icon/hicolor/128x128/apps/ai.storyteller.cadcraft.png")),
+    accent: Some([0x3e, 0xa6, 0xe8]),
+    ..craft_update::suite::CADCRAFT
+};
+
 pub mod aliasdlg;
 pub mod animation;
 pub mod autosave;
diff --git a/crates/ui-egui/src/updates_ui.rs b/crates/ui-egui/src/updates_ui.rs
index 1bd05c6f8..ffc625767 100644
--- a/crates/ui-egui/src/updates_ui.rs
+++ b/crates/ui-egui/src/updates_ui.rs
@@ -2,7 +2,6 @@
 //! Updates… (desktop only; the web build is always the latest). The flow itself is
 //! `craft_update::updater::Updater`.
 
-use craft_update::suite::CADCRAFT;
 use craft_update::updater::{Action, Status, Updater};
 
 use crate::CadApp;
@@ -21,7 +20,7 @@ pub struct Runtime {
 
 impl Default for Runtime {
     fn default() -> Self {
-        Self { updater: Updater::new(&CADCRAFT, VERSION), enabled: false, check_requested: false }
+        Self { updater: Updater::new(&crate::UPDATE_APP, VERSION), enabled: false, check_requested: false }
     }
 }
 
diff --git a/xtask/src/layers.rs b/xtask/src/layers.rs
index aab245784..c23825d11 100644
--- a/xtask/src/layers.rs
+++ b/xtask/src/layers.rs
@@ -167,10 +167,8 @@ pub fn check(crates: &[Crate]) -> Vec<Violation> {
                 match classify(&d.name) {
                     // Unregistered deps are reported on their own entry.
                     None => {}
-                    Some(Class::Testkit) => {
-                        if d.kind != DepKind::Dev {
-                            out.push(Violation::TestkitAsNormalDep { krate: c.name.clone() });
-                        }
+                    Some(Class::Testkit) if d.kind != DepKind::Dev => {
+                        out.push(Violation::TestkitAsNormalDep { krate: c.name.clone() });
                     }
                     Some(dc) => {
                         let to = dc.layer().unwrap_or(u8::MAX);