feat(versions): install the chosen version from the Choose version dialog

Choosing a version keeps the dialog open. An Install version {tag} button sits at its
bottom right, enabled once that exact release has been checked (Checking... while a
nightly is looked up, Installed when it is the installed copy). Install from the dialog
may open the folder dialog in its place, which dialogs() now keeps instead of
restoring the old one. The help line keeps only the files warning.

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

crates/ui-egui/src/dialogs.rs

@@ -39,6 +39,10 @@ impl LauncherUi {
             Dialog::LauncherUpdate(r) => modal.show(ctx, |ui| close = self.launcher_update_dialog(ui, r)),
             Dialog::Versions(id) => modal.show(ctx, |ui| close = self.version_dialog(ui, id)),
         };
+        if self.dialog.as_ref().is_some_and(|active| active.key() != dialog.key()) {
+            // A control inside a dialog opened a different one; don't restore the old dialog.
+            return;
+        }
         if close || response.should_close() {
             self.dialog = None;
         } else {

crates/ui-egui/src/i18n/cs.tsv

@@ -359,5 +359,5 @@ column	Author	Autor
 	Install version {version}	Nainstalovat verzi {version}
 	Download selected version	Stáhnout vybranou verzi
 	Older launcher versions require a manual reinstall.	Starší verze spouštěče vyžadují ruční přeinstalaci.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Po výběru verze se na místě Otevřít zobrazí Nainstalovat verzi. Starší verze nemusí vaše soubory otevřít.
+	Your files may not open in older versions.	Starší verze nemusí vaše soubory otevřít.
 	Enable automatic installs in Settings to follow new nightly builds.	Chcete-li automaticky dostávat nová noční sestavení, zapněte v nastavení automatické instalace.

crates/ui-egui/src/i18n/de.tsv

@@ -391,5 +391,5 @@ column	Author	Autor
 	Install version {version}	Version {version} installieren
 	Download selected version	Ausgewählte Version herunterladen
 	Older launcher versions require a manual reinstall.	Ältere Launcher-Versionen müssen manuell neu installiert werden.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Nach der Wahl einer Version erscheint anstelle von Öffnen die Schaltfläche Version installieren. Ältere Versionen können deine Dateien möglicherweise nicht öffnen.
+	Your files may not open in older versions.	Ältere Versionen können deine Dateien möglicherweise nicht öffnen.
 	Enable automatic installs in Settings to follow new nightly builds.	Aktiviere automatische Installationen in den Einstellungen, um neuen Nightly-Builds zu folgen.

crates/ui-egui/src/i18n/es.tsv

@@ -372,5 +372,5 @@ column	Author	Autor
 	Install version {version}	Instalar la versión {version}
 	Download selected version	Descargar la versión seleccionada
 	Older launcher versions require a manual reinstall.	Las versiones anteriores del iniciador requieren una reinstalación manual.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Al elegir una versión, Instalar la versión aparece en lugar de Abrir. Es posible que tus archivos no se abran en versiones antiguas.
+	Your files may not open in older versions.	Es posible que tus archivos no se abran en versiones antiguas.
 	Enable automatic installs in Settings to follow new nightly builds.	Activa las instalaciones automáticas en Ajustes para recibir las nuevas versiones nocturnas.

crates/ui-egui/src/i18n/fr.tsv

@@ -389,5 +389,5 @@ column	Author	Auteur
 	Install version {version}	Installer la version {version}
 	Download selected version	Télécharger la version choisie
 	Older launcher versions require a manual reinstall.	Les anciennes versions du lanceur nécessitent une réinstallation manuelle.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Après avoir choisi une version, Installer la version apparaît à la place de Ouvrir. Tes fichiers pourraient ne pas s’ouvrir avec une ancienne version.
+	Your files may not open in older versions.	Tes fichiers pourraient ne pas s’ouvrir avec une ancienne version.
 	Enable automatic installs in Settings to follow new nightly builds.	Active les installations automatiques dans les paramètres pour recevoir les nouvelles versions nocturnes.

crates/ui-egui/src/i18n/hu.tsv

@@ -392,5 +392,5 @@ column	Author	Szerző
 	Install version {version}	A(z) {version} verzió telepítése
 	Download selected version	Kiválasztott verzió letöltése
 	Older launcher versions require a manual reinstall.	Az indító régebbi verzióit kézzel kell újratelepíteni.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Verzió kiválasztása után a Telepítés gomb jelenik meg a Megnyitás helyén. Előfordulhat, hogy a régebbi verziók nem tudják megnyitni a fájljaidat.
+	Your files may not open in older versions.	Előfordulhat, hogy a régebbi verziók nem tudják megnyitni a fájljaidat.
 	Enable automatic installs in Settings to follow new nightly builds.	Az új éjszakai kiadások követéséhez kapcsold be az automatikus telepítést a beállításokban.

crates/ui-egui/src/i18n/ja.tsv

@@ -394,5 +394,5 @@ column	Author	作者
 	Install version {version}	バージョン {version} をインストール
 	Download selected version	選択したバージョンをダウンロード
 	Older launcher versions require a manual reinstall.	古いランチャーに戻すには手動で再インストールする必要があります。
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	バージョンを選ぶと、「開く」の代わりに「バージョンをインストール」が表示されます。古いバージョンではファイルを開けない場合があります。
+	Your files may not open in older versions.	古いバージョンではファイルを開けない場合があります。
 	Enable automatic installs in Settings to follow new nightly builds.	新しいナイトリービルドを自動的に受け取るには、設定で自動インストールを有効にしてください。

crates/ui-egui/src/i18n/pl.tsv

@@ -393,5 +393,5 @@ column	Author	Autor
 	Install version {version}	Zainstaluj wersję {version}
 	Download selected version	Pobierz wybraną wersję
 	Older launcher versions require a manual reinstall.	Starsze wersje programu uruchamiającego wymagają ręcznej ponownej instalacji.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Po wybraniu wersji na miejscu opcji Otwórz pojawi się Zainstaluj wersję. Starsza wersja może nie otwierać Twoich plików.
+	Your files may not open in older versions.	Starsza wersja może nie otwierać Twoich plików.
 	Enable automatic installs in Settings to follow new nightly builds.	Włącz automatyczne instalacje w Ustawieniach, aby otrzymywać nowe wersje nocne.

crates/ui-egui/src/i18n/pt-BR.tsv

@@ -379,5 +379,5 @@ column	Author	Autor
 	Install version {version}	Instalar a versão {version}
 	Download selected version	Baixar a versão selecionada
 	Older launcher versions require a manual reinstall.	Versões antigas do inicializador exigem reinstalação manual.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	Ao escolher uma versão, Instalar a versão aparece no lugar de Abrir. Seus arquivos podem não abrir em versões antigas.
+	Your files may not open in older versions.	Seus arquivos podem não abrir em versões antigas.
 	Enable automatic installs in Settings to follow new nightly builds.	Ative as instalações automáticas nas Configurações para receber as novas versões noturnas.

crates/ui-egui/src/i18n/ru.tsv

@@ -387,5 +387,5 @@ column	Author	Автор
 	Install version {version}	Установить версию {version}
 	Download selected version	Скачать выбранную версию
 	Older launcher versions require a manual reinstall.	Для возврата к старой версии лаунчера нужна переустановка вручную.
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	После выбора версии на месте кнопки «Открыть» появится «Установить версию». В старой версии ваши файлы могут не открыться.
+	Your files may not open in older versions.	В старой версии ваши файлы могут не открыться.
 	Enable automatic installs in Settings to follow new nightly builds.	Чтобы получать новые ночные сборки, включите автоматическую установку в настройках.

crates/ui-egui/src/i18n/zh-CN.tsv

@@ -359,5 +359,5 @@ column	Version	版本
 	Install version {version}	安装版本 {version}
 	Download selected version	下载所选版本
 	Older launcher versions require a manual reinstall.	旧版启动器需要手动重新安装。
-	After choosing a version, Install version appears in place of Open. Your files may not open in older versions.	选择版本后，「打开」会变为「安装版本」。旧版可能无法打开你的文件。
+	Your files may not open in older versions.	旧版可能无法打开你的文件。
 	Enable automatic installs in Settings to follow new nightly builds.	在设置中启用自动安装，即可跟进新的每日构建版。

crates/ui-egui/src/versions.rs

@@ -2,6 +2,7 @@
 use artcraft_launcher_core::catalog::{CraftApp, LAUNCHER, LAUNCHER_ID};
 use artcraft_launcher_core::protocol::VersionTrack;
 use artcraft_launcher_core::release::{Release, is_nightly};
+use artcraft_launcher_core::version;
 use egui::{RichText, Ui};
 
 use crate::app::LauncherUi;
@@ -17,15 +18,53 @@ impl LauncherUi {
         ui.heading(format!("{} · {}", app.name, tl!("Choose version")));
         ui.add_space(8.0);
         let label = ui.label(tl!("Version"));
-        let selected = self.version_combo(ui, id, app, 440.0, label.id);
+        // A choice keeps the dialog open: the Install button below follows it.
+        self.version_combo(ui, id, app, 440.0, label.id);
         ui.add_space(10.0);
-        ui.label(
-            RichText::new(tl!("After choosing a version, Install version appears in place of Open. Your files may not open in older versions."))
-                .color(t.muted),
-        );
+        ui.label(RichText::new(tl!("Your files may not open in older versions.")).color(t.muted));
         ui.label(RichText::new(tl!("Enable automatic installs in Settings to follow new nightly builds.")).color(t.muted));
         ui.add_space(12.0);
-        selected || widgets::button(ui, tl!("Close"), Kind::Secondary, 100.0).clicked()
+        let (mut close, mut install) = (false, false);
+        ui.horizontal(|ui| {
+            close = widgets::button(ui, tl!("Close"), Kind::Secondary, 100.0).clicked();
+            if let Some((label, ready)) = self.chosen_install(id) {
+                ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
+                    install = ui.add_enabled_ui(ready, |ui| widgets::button(ui, &label, Kind::Primary, 220.0)).inner.clicked();
+                });
+            }
+        });
+        if install {
+            // May open the folder dialog in this one's place; `dialogs` keeps it.
+            self.install_app(id);
+            return true;
+        }
+        close
+    }
+
+    /// The dialog's Install button for the chosen version: its label, and whether that exact release
+    /// has been checked, can be downloaded here and isn't the installed copy. `None` when there is
+    /// nothing to install (no choice the backend can answer, or a job already running).
+    fn chosen_install(&self, id: &str) -> Option<(String, bool)> {
+        let entry = self.entry(id)?;
+        if !self.caps.manage_apps || entry.job.is_some() {
+            return None;
+        }
+        let release = entry.release();
+        let tag = match self.settings.versions.get(id).cloned().unwrap_or_default() {
+            VersionTrack::Pinned(tag) => tag,
+            VersionTrack::Nightly => match release {
+                Some(r) if is_nightly(r) => r.tag.clone(),
+                _ if self.checking => return Some((tl!("Checking…").to_string(), false)),
+                _ => return None,
+            },
+            VersionTrack::Stable => release.filter(|r| !r.prerelease)?.tag.clone(),
+        };
+        let installed = entry.installed.as_ref().and_then(|i| i.version.as_ref());
+        if installed.is_some() && installed == version::parse(&tag).as_ref() {
+            return Some((tl!("Installed").to_string(), false));
+        }
+        let ready = release.is_some_and(|r| r.tag == tag) && entry.has_download(self.platform);
+        Some((crate::fmt(tl!("Install version {version}"), &[("version", &tag)]), ready))
     }
 
     pub(crate) fn version_combo(&mut self, ui: &mut Ui, id: &str, app: &CraftApp, width: f32, label: egui::Id) -> bool {

crates/ui-egui/tests/ui.rs

@@ -495,15 +495,18 @@ fn choosing_an_app_version_turns_its_main_action_into_install() {
         "selection must refresh the release used by Install"
     );
     assert!(!sent.borrow().iter().any(|c| matches!(c, Command::Install { .. })), "selection itself must not install");
-    h.run_steps(2);
-    assert!(h.query_by_label("Version").is_none(), "choosing a version closes the dialog");
-    h.get_by_label("More actions for PhotoCraft").click();
-    h.run_steps(3);
-    assert!(h.query_by_label("Install selected version").is_none(), "no second install action should hide in the menu");
-    h.get_all_by_label("Install version v0.4.0").next().unwrap().click();
-    h.run_steps(2);
+    h.run_steps(4);
+    assert!(h.query_by_label("Version").is_some(), "choosing a version keeps the dialog open");
+    // The dialog's own Install sits on its Close button's row; the card shows the same label.
+    let row = h.get_by_label("Close").rect().center().y;
+    h.get_all_by_label("Install version v0.4.0")
+        .find(|n| (n.rect().center().y - row).abs() < 4.0)
+        .expect("the dialog offers Install for the chosen version")
+        .click();
+    h.run_steps(4);
     assert!(sent.borrow().iter().any(|c| matches!(c, Command::Install { app } if app == "photocraft")));
     assert!(!sent.borrow().iter().any(|c| matches!(c, Command::Launch { app } if app == "photocraft")));
+    assert!(h.query_by_label("Version").is_none(), "installing closes the dialog");
     // Once the pinned version is the installed copy, the card opens it again.
     let opens = h.query_all_by_label("Open").count();
     queue.borrow_mut().push(Event::Detected {