Tell people when a newer release is out (#1100)

At start, and at most once a day, a background thread asks GitHub for the latest stable
release (one HTTPS GET to releases/latest, nothing else sent; 15 s timeout; silent when
offline; GitHub's rate limit respected). When it is newer than this build, an Update button
appears next to Report a bug. It opens a window with the version, the release notes and
Download (the asset that fits this installation), Skip this version and Remind me later.

- Versions compare as semver; a nightly counts as the release it was built after, so it is
  offered only a newer stable release.
- The installation is detected (AppImage, Flatpak, Snap from the store or a file, deb, rpm,
  tar.gz, Windows MSI/portable/exe, macOS app); Download picks the fixed-name asset.
  Development builds and the Flatpak (no network permission) never check.
- Preferences > General > Updates: Check for updates automatically (on) and Check now.
- HTTP via ureq + rustls with the operating system's certificates (desktop app only).
- docs: Updates and privacy page.

Co-authored-by: Claude Opus 5.5 <[email protected]>

assets/icons/ui/source/icons.rs

@@ -266,6 +266,12 @@ pub fn paint(p: &Painter, r: Rect, name: &str, ink: Color32, fill: Color32, acce
                 pen.line(&[(17.0, y), (21.0, y)], ink);
             }
         }
+        // Update: an arrow down onto a tray (a newer release can be downloaded).
+        "update" => {
+            pen.line(&[(12.0, 3.5), (12.0, 14.5)], ink);
+            pen.line(&[(7.5, 10.0), (12.0, 14.5), (16.5, 10.0)], ink);
+            pen.line(&[(4.0, 15.0), (4.0, 20.0), (20.0, 20.0), (20.0, 15.0)], ink);
+        }
         // Help: a question mark in a ring.
         "help" => {
             pen.circle(12.0, 12.0, 9.0, Color32::TRANSPARENT, ink);

assets/locales/de.json

@@ -701,5 +701,29 @@
   "sketch_text.align_right": "Rechts",
   "sketch_text.path_hint": "Eine Skizzenkurve, der der Text folgt: hier klicken, dann die Kurve",
   "sketch_text.path_clear": "Text von der Kurve lösen",
-  "sketch_text.on_path": "Der Text folgt seiner Kurve: sie bestimmt seine Lage"
+  "sketch_text.on_path": "Der Text folgt seiner Kurve: sie bestimmt seine Lage",
+  "update.button": "Update",
+  "update.button_tip": "SolidCraft {version} ist verfügbar",
+  "update.title": "Update verfügbar",
+  "update.available": "SolidCraft {version} ist verfügbar",
+  "update.you_have": "Installiert ist {version}.",
+  "update.no_notes": "Zu diesem Release gibt es keine Hinweise.",
+  "update.system_hint": "Diese Installation ist ein {kind}. Aktualisieren mit:",
+  "update.package_hint": "Diese Installation stammt aus einem {kind}. Neues Paket herunterladen und installieren mit:",
+  "update.copy": "Kopieren",
+  "update.file": "Herunterladen holt {file}.",
+  "update.download": "Herunterladen",
+  "update.release_page": "Release-Seite öffnen",
+  "update.skip": "Diese Version überspringen",
+  "update.later": "Später erinnern",
+  "update.prefs_label": "Updates",
+  "update.check_automatically": "Automatisch nach Updates suchen",
+  "update.check_now": "Jetzt suchen",
+  "update.checking": "Suche läuft…",
+  "update.failed": "Suche fehlgeschlagen: {error}",
+  "update.up_to_date": "SolidCraft ist aktuell.",
+  "update.prefs_note": "Dies ist SolidCraft {version} ({kind}). Die Suche fragt GitHub nach dem neuesten Release und sendet sonst nichts.",
+  "update.prefs_dev": "Dies ist ein Entwicklungs-Build ({version}): er sucht nicht nach Updates.",
+  "update.show": "Update auf {version} anzeigen",
+  "update.prefs_flatpak": "Flatpak aktualisiert diese Installation ({version}): {command} ausführen oder die Softwareverwaltung nutzen. SolidCraft sucht nicht selbst."
 }

assets/locales/en.json

@@ -959,6 +959,30 @@
   "Line Spacing": "Line Spacing",
   "Path": "Path",
   "sketch_text.on_path": "The text follows its path: the curve places it",
-  "cmd.material_properties_validate":"Validate Physical Material Data",
-  "cmd.material_properties_directional":"Directional Elastic Modulus"
+  "cmd.material_properties_validate": "Validate Physical Material Data",
+  "cmd.material_properties_directional": "Directional Elastic Modulus",
+  "update.button": "Update",
+  "update.button_tip": "SolidCraft {version} is available",
+  "update.title": "Update available",
+  "update.available": "SolidCraft {version} is available",
+  "update.you_have": "You have {version}.",
+  "update.no_notes": "This release has no notes.",
+  "update.system_hint": "This copy is a {kind}. Update it with:",
+  "update.package_hint": "This copy came from a {kind}. Download the new package, then install it with:",
+  "update.copy": "Copy",
+  "update.file": "Download gets {file}.",
+  "update.download": "Download",
+  "update.release_page": "Open release page",
+  "update.skip": "Skip this version",
+  "update.later": "Remind me later",
+  "update.prefs_label": "Updates",
+  "update.check_automatically": "Check for updates automatically",
+  "update.check_now": "Check now",
+  "update.checking": "Checking…",
+  "update.failed": "Couldn't check: {error}",
+  "update.up_to_date": "SolidCraft is up to date.",
+  "update.prefs_note": "This is SolidCraft {version} ({kind}). A check asks GitHub for the latest release and sends nothing else.",
+  "update.prefs_dev": "This is a development build ({version}): it doesn't check for updates.",
+  "update.show": "Show the update to {version}",
+  "update.prefs_flatpak": "Flatpak updates this copy ({version}): run {command} or use your software center. SolidCraft doesn't check."
 }

assets/locales/ja.json

@@ -959,6 +959,30 @@
   "Line Spacing": "行間",
   "Path": "パス",
   "sketch_text.on_path": "文字はパスに沿います: 位置は曲線で決まります",
-  "cmd.material_properties_validate":"物理材料データを検証",
-  "cmd.material_properties_directional":"方向別弾性率"
+  "cmd.material_properties_validate": "物理材料データを検証",
+  "cmd.material_properties_directional": "方向別弾性率",
+  "update.button": "アップデート",
+  "update.button_tip": "SolidCraft {version} が利用できます",
+  "update.title": "アップデートがあります",
+  "update.available": "SolidCraft {version} が利用できます",
+  "update.you_have": "現在のバージョンは {version} です。",
+  "update.no_notes": "このリリースにはリリースノートがありません。",
+  "update.system_hint": "このコピーは {kind} です。次のコマンドで更新します:",
+  "update.package_hint": "このコピーは {kind} からインストールされました。新しいパッケージをダウンロードし、次のコマンドでインストールします:",
+  "update.copy": "コピー",
+  "update.file": "ダウンロードするファイル: {file}",
+  "update.download": "ダウンロード",
+  "update.release_page": "リリースページを開く",
+  "update.skip": "このバージョンをスキップ",
+  "update.later": "後で通知",
+  "update.prefs_label": "アップデート",
+  "update.check_automatically": "アップデートを自動的に確認",
+  "update.check_now": "今すぐ確認",
+  "update.checking": "確認中…",
+  "update.failed": "確認できませんでした: {error}",
+  "update.up_to_date": "SolidCraft は最新です。",
+  "update.prefs_note": "これは SolidCraft {version} ({kind}) です。確認では GitHub に最新リリースを問い合わせるだけで、ほかには何も送信しません。",
+  "update.prefs_dev": "これは開発ビルド ({version}) のため、アップデートを確認しません。",
+  "update.show": "{version} へのアップデートを表示",
+  "update.prefs_flatpak": "このコピー ({version}) は Flatpak が更新します: {command} を実行するか、ソフトウェアセンターを使ってください。SolidCraft 自身は確認しません。"
 }

assets/locales/ko.json

@@ -701,5 +701,29 @@
   "sketch_text.align_right": "오른쪽",
   "sketch_text.path_hint": "텍스트가 따라갈 스케치 곡선: 여기를 클릭한 다음 곡선을 클릭",
   "sketch_text.path_clear": "곡선에서 텍스트 떼기",
-  "sketch_text.on_path": "텍스트가 경로를 따릅니다: 위치는 곡선이 정합니다"
+  "sketch_text.on_path": "텍스트가 경로를 따릅니다: 위치는 곡선이 정합니다",
+  "update.button": "업데이트",
+  "update.button_tip": "SolidCraft {version} 사용 가능",
+  "update.title": "업데이트 사용 가능",
+  "update.available": "SolidCraft {version} 사용 가능",
+  "update.you_have": "현재 버전은 {version}입니다.",
+  "update.no_notes": "이 릴리스에는 릴리스 노트가 없습니다.",
+  "update.system_hint": "이 사본은 {kind}입니다. 다음 명령으로 업데이트하세요:",
+  "update.package_hint": "이 사본은 {kind}(으)로 설치되었습니다. 새 패키지를 내려받은 뒤 다음 명령으로 설치하세요:",
+  "update.copy": "복사",
+  "update.file": "내려받을 파일: {file}",
+  "update.download": "다운로드",
+  "update.release_page": "릴리스 페이지 열기",
+  "update.skip": "이 버전 건너뛰기",
+  "update.later": "나중에 알림",
+  "update.prefs_label": "업데이트",
+  "update.check_automatically": "업데이트 자동 확인",
+  "update.check_now": "지금 확인",
+  "update.checking": "확인 중…",
+  "update.failed": "확인할 수 없습니다: {error}",
+  "update.up_to_date": "SolidCraft가 최신 버전입니다.",
+  "update.prefs_note": "SolidCraft {version} ({kind})입니다. 확인 시 GitHub에 최신 릴리스만 요청하며 다른 정보는 보내지 않습니다.",
+  "update.prefs_dev": "개발 빌드({version})이므로 업데이트를 확인하지 않습니다.",
+  "update.show": "{version} 업데이트 보기",
+  "update.prefs_flatpak": "이 사본({version})은 Flatpak이 업데이트합니다: {command}를 실행하거나 소프트웨어 센터를 사용하세요. SolidCraft는 직접 확인하지 않습니다."
 }

assets/locales/zh.json

@@ -959,6 +959,30 @@
   "sketch_text.on_path": "文字沿路径排列：由曲线放置",
   "ui.analysis": "分析",
   "ui.edit_section_analysis": "编辑截面分析",
-  "cmd.material_properties_validate":"验证物理材料数据",
-  "cmd.material_properties_directional":"方向弹性模量"
+  "cmd.material_properties_validate": "验证物理材料数据",
+  "cmd.material_properties_directional": "方向弹性模量",
+  "update.button": "更新",
+  "update.button_tip": "SolidCraft {version} 已发布",
+  "update.title": "有可用更新",
+  "update.available": "SolidCraft {version} 已发布",
+  "update.you_have": "当前版本为 {version}。",
+  "update.no_notes": "此版本没有发布说明。",
+  "update.system_hint": "此副本为 {kind}。用以下命令更新:",
+  "update.package_hint": "此副本来自 {kind}。下载新软件包后用以下命令安装:",
+  "update.copy": "复制",
+  "update.file": "将下载 {file}。",
+  "update.download": "下载",
+  "update.release_page": "打开发布页面",
+  "update.skip": "跳过此版本",
+  "update.later": "稍后提醒",
+  "update.prefs_label": "更新",
+  "update.check_automatically": "自动检查更新",
+  "update.check_now": "立即检查",
+  "update.checking": "正在检查…",
+  "update.failed": "无法检查: {error}",
+  "update.up_to_date": "SolidCraft 已是最新版本。",
+  "update.prefs_note": "当前为 SolidCraft {version}({kind})。检查时只向 GitHub 查询最新版本,不发送其他任何数据。",
+  "update.prefs_dev": "这是开发版本({version}),不检查更新。",
+  "update.show": "显示 {version} 更新",
+  "update.prefs_flatpak": "此副本({version})由 Flatpak 更新:运行 {command} 或使用软件中心。SolidCraft 不会自行检查。"
 }