diff --git a/Cargo.lock b/Cargo.lock
index a39620f96..5d78dbed4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -910,12 +910,12 @@ dependencies = [
 [[package]]
 name = "craft-fonts-build"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 
 [[package]]
 name = "craft-i18n"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 dependencies = [
  "fixed_decimal",
  "icu_decimal",
@@ -938,7 +938,7 @@ dependencies = [
 [[package]]
 name = "craft-print"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 dependencies = [
  "craft-winprint-gdi",
  "log",
@@ -952,7 +952,7 @@ dependencies = [
 [[package]]
 name = "craft-ui"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 dependencies = [
  "craft-fonts-build",
  "craft-i18n",
@@ -972,7 +972,7 @@ dependencies = [
 [[package]]
 name = "craft-update"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 dependencies = [
  "chrono",
  "dunce",
@@ -1018,7 +1018,7 @@ dependencies = [
 [[package]]
 name = "craft-window"
 version = "0.1.0"
-source = "git+https://github.com/storytold/craft-libs?rev=c5a1cbfb5f9049f9270955caffb5bee5997aebf7#c5a1cbfb5f9049f9270955caffb5bee5997aebf7"
+source = "git+https://github.com/dotCooCoo/craft-libs?rev=c7c84230631cbc01ee928f0a0e0d838b1ed612ae#c7c84230631cbc01ee928f0a0e0d838b1ed612ae"
 dependencies = [
  "egui",
  "objc2 0.6.5",
@@ -1029,7 +1029,7 @@ dependencies = [
 [[package]]
 name = "craft-winprint-gdi"
 version = "0.1.0"
-source = "git+https://github.com/storytold/winprint.rs?rev=417ac3c4d14d3da5485a99c7d5ce8f05664ec312#417ac3c4d14d3da5485a99c7d5ce8f05664ec312"
+source = "git+https://github.com/storytold/winprint.rs?rev=64e7afd4d1483512385012c340ecaaaf0f3beb7f#64e7afd4d1483512385012c340ecaaaf0f3beb7f"
 dependencies = [
  "windows-sys 0.61.2",
 ]
@@ -6485,7 +6485,7 @@ dependencies = [
 [[package]]
 name = "winprint"
 version = "0.2.1"
-source = "git+https://github.com/storytold/winprint.rs?rev=5f80b9baf6b58937c401656634e42d33f00ddf49#5f80b9baf6b58937c401656634e42d33f00ddf49"
+source = "git+https://github.com/storytold/winprint.rs?rev=64e7afd4d1483512385012c340ecaaaf0f3beb7f#64e7afd4d1483512385012c340ecaaaf0f3beb7f"
 dependencies = [
  "flate2",
  "fmt-derive",
@@ -6935,7 +6935,6 @@ dependencies = [
  "nix",
  "typed-path",
  "windows-sys 0.61.2",
- "zopfli",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 594b29273..bc69f4847 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,9 +26,9 @@ gridcraft-mcp = { path = "crates/mcp" }
 gridcraft-pdf = { path = "crates/pdf" }
 gridcraft-math = { path = "crates/math" }
 # Every craft-libs crate (craft-update and craft-window here, craft-ui in ui-egui, craft-print in
-# the app) comes from one storytold/craft-libs revision.
+# the app) comes from one craft-libs revision.
 # craft-update: app-specific pretend versions apply to startup and manual checks.
-craft-update = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7", version = "=0.1.0", features = ["egui"] }
+craft-update = { git = "https://github.com/dotCooCoo/craft-libs", rev = "c7c84230631cbc01ee928f0a0e0d838b1ed612ae", version = "=0.1.0", features = ["egui"] }
 
 # foundation
 thiserror = "2"
@@ -71,7 +71,7 @@ skrifa = { version = "0.44", default-features = false, features = ["std"] }
 epaint_default_fonts = "0.37"
 # One native window per workbook: the window list, Window menu titles and the immediate-viewport
 # driver. Same craft-libs revision as craft-update above.
-craft-window = { version = "0.1.0", git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7", default-features = false, features = ["egui"] }
+craft-window = { version = "0.1.0", git = "https://github.com/dotCooCoo/craft-libs", rev = "c7c84230631cbc01ee928f0a0e0d838b1ed612ae", default-features = false, features = ["egui"] }
 
 [workspace.lints.rust]
 unsafe_code = "forbid"
diff --git a/apps/gridcraft/Cargo.toml b/apps/gridcraft/Cargo.toml
index a7472821f..e706279ce 100644
--- a/apps/gridcraft/Cargo.toml
+++ b/apps/gridcraft/Cargo.toml
@@ -34,7 +34,7 @@ winit = { version = "0.30", default-features = false, features = ["x11", "waylan
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # Same craft-libs revision as the workspace's craft-update and craft-window (see the root
 # Cargo.toml).
-craft-print = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7" }
+craft-print = { git = "https://github.com/dotCooCoo/craft-libs", rev = "c7c84230631cbc01ee928f0a0e0d838b1ed612ae" }
 craft-update = { workspace = true }
 rfd = { workspace = true }
 arboard = { workspace = true, features = ["image-data"] }
diff --git a/apps/gridcraft/src/main.rs b/apps/gridcraft/src/main.rs
index 2aa98b6eb..cc67e241a 100644
--- a/apps/gridcraft/src/main.rs
+++ b/apps/gridcraft/src/main.rs
@@ -64,6 +64,9 @@ impl eframe::App for App {
     fn on_exit(&mut self) {
         print::finish_pending_jobs();
         save_prefs(&self.0);
+        // A ready update installs once the process has exited. The macOS exit below skips
+        // dropping the app, so the helper is started here.
+        self.0.start_pending_update();
         // macOS (#117): end the process here, before eframe tears the window down. AccessKit's
         // macOS adapter subclasses the window's content view and restores its class on teardown;
         // AppKit's Touch Bar support observes that view (KVO), so in the next display cycle
diff --git a/crates/ui-egui/Cargo.toml b/crates/ui-egui/Cargo.toml
index fd18f7041..7dccfd584 100644
--- a/crates/ui-egui/Cargo.toml
+++ b/crates/ui-egui/Cargo.toml
@@ -11,7 +11,7 @@ workspace = true
 [dependencies]
 # The shared capture slot (`craft_ui::capture`) comes from the one craft-libs revision every
 # craft-libs dependency uses (see the root Cargo.toml).
-craft-ui = { git = "https://github.com/storytold/craft-libs", rev = "c5a1cbfb5f9049f9270955caffb5bee5997aebf7" }
+craft-ui = { git = "https://github.com/dotCooCoo/craft-libs", rev = "c7c84230631cbc01ee928f0a0e0d838b1ed612ae" }
 gridcraft-engine = { workspace = true }
 gridcraft-chart = { workspace = true }
 # `monochrome_emoji_fonts` restores the Noto Emoji and emoji-icon faces that 0.37 moved behind
diff --git a/crates/ui-egui/src/app/prefs.rs b/crates/ui-egui/src/app/prefs.rs
index 216e4a568..151374e6e 100644
--- a/crates/ui-egui/src/app/prefs.rs
+++ b/crates/ui-egui/src/app/prefs.rs
@@ -64,4 +64,12 @@ impl SheetApp {
             self.message = Some(("GridCraft".into(), "The web version is always the latest release.".into()));
         }
     }
+
+    /// Starts the install helper of an update that is ready, so it installs once the process has
+    /// exited (a no-op on the web, and when no update is ready). Call it in `on_exit` when the
+    /// process ends there, since the app is then never dropped.
+    pub fn start_pending_update(&mut self) {
+        #[cfg(not(target_arch = "wasm32"))]
+        updates_ui::start_pending_update(self);
+    }
 }
diff --git a/crates/ui-egui/src/updates_ui.rs b/crates/ui-egui/src/updates_ui.rs
index 2553fbbc7..cded96c85 100644
--- a/crates/ui-egui/src/updates_ui.rs
+++ b/crates/ui-egui/src/updates_ui.rs
@@ -15,13 +15,11 @@ pub(crate) struct Runtime {
     startup: bool,
     /// Help ▸ Check for Updates… was chosen; the next `tick` starts it.
     manual: bool,
-    /// The result dialog of a requested check is showing.
-    result_open: bool,
 }
 
 impl Default for Runtime {
     fn default() -> Self {
-        Self { updater: Updater::new(&crate::UPDATE_APP, VERSION), startup: false, manual: false, result_open: false }
+        Self { updater: Updater::new(&crate::UPDATE_APP, VERSION), startup: false, manual: false }
     }
 }
 
@@ -38,19 +36,26 @@ pub(crate) fn tick(app: &mut SheetApp, ctx: &egui::Context) {
     let rt = &mut app.updates_rt;
     if std::mem::take(&mut rt.manual) {
         rt.updater.check_now(ctx);
-        rt.result_open = true;
     } else if rt.startup {
         rt.updater.check_at_start(ctx);
     }
     rt.updater.tick(ctx);
-    // A requested check that found a release leaves the status idle and the prompt opens.
-    if matches!(rt.updater.status(), Status::Idle) {
-        rt.result_open = false;
-    }
+}
+
+/// Starts the helper of a ready update; it installs once the process has exited.
+pub(crate) fn start_pending_update(app: &mut SheetApp) {
+    app.updates_rt.updater.start_pending_update();
+}
+
+/// Whether the check result window shows: for every status but idle (a requested check, and the
+/// first start after an update, which reports that it installed or why it failed), and never
+/// over the startup prompt.
+fn result_window_shows(status: &Status, prompt_open: bool) -> bool {
+    !prompt_open && !matches!(status, Status::Idle)
 }
 
 pub(crate) fn show(app: &mut SheetApp, ctx: &egui::Context) {
-    // The restart helper is scheduled before the app closes, so no update starts over unsaved work.
+    // The close for a ready update waits until no workbook holds unsaved work.
     let clean = !app.session.documents().iter().any(|d| d.is_dirty());
     match app.updates_rt.updater.show_if(ctx, clean) {
         Action::OpenUrl(url) => {
@@ -58,20 +63,42 @@ pub(crate) fn show(app: &mut SheetApp, ctx: &egui::Context) {
                 open(&url);
             }
         }
-        // The guarded close path asks about unsaved work; the restart helper relaunches once the
-        // process has exited.
-        Action::Close => ctx.send_viewport_cmd(egui::ViewportCommand::Close),
+        // Quit closes every workbook window. The install helper starts once the app exits.
+        Action::Close => app.request_quit(ctx),
         Action::None => {}
     }
-    if app.updates_rt.result_open {
-        let rt = &mut app.updates_rt;
+    let rt = &mut app.updates_rt;
+    if result_window_shows(rt.updater.status(), rt.updater.prompt_open()) {
         match craft_update::CheckResultDialog::new(&crate::UPDATE_APP, VERSION).show(ctx, rt.updater.status()) {
-            CheckResultResponse::Close => {
-                rt.updater.dismiss_status();
-                rt.result_open = false;
-            }
+            CheckResultResponse::Close => rt.updater.dismiss_status(),
             CheckResultResponse::CheckAgain => rt.updater.check_now(ctx),
+            // The next `show_if` asks the window to close once nothing is unsaved.
+            CheckResultResponse::RestartToUpdate => rt.updater.restart_to_update(),
             CheckResultResponse::None => {}
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn result_window_shows_every_status_but_idle() {
+        let shown = [
+            Status::Checking,
+            Status::UpToDate,
+            Status::Failed("no network".into()),
+            Status::Installing,
+            Status::Ready,
+            Status::Managed,
+            Status::Updated("0.2.0".into()),
+            Status::InstallFailed("disk full".into()),
+        ];
+        for status in &shown {
+            assert!(result_window_shows(status, false), "{status:?}");
+            assert!(!result_window_shows(status, true), "{status:?} over the prompt");
+        }
+        assert!(!result_window_shows(&Status::Idle, false));
+    }
+}