Window zoom: Ctrl + wheel / Ctrl ± / Ctrl+0 (split from #326)

docs/ARCHITECTURE.md

@@ -180,6 +180,20 @@ Bump `AppSettings.CurrentSchemaVersion` and add a step to `SettingsMigrations` w
   stay left to right. Light/dark surface colours are theme dictionaries in `Styles/Soft.axaml`; a user's
   `theme.json` (`CustomTheme`, see [CUSTOM-THEMES.md](CUSTOM-THEMES.md)) overrides them with theme dictionaries in
   application resources, which are searched first.
+- Window zoom (`Services/UiZoom`): Theme → *Window size* (− / + and *Reset*), and in any tracked window the
+  platform's command key (`HotkeyConfiguration.CommandModifiers`: Ctrl, Cmd on macOS) with the mouse wheel, plus /
+  minus (Shift allowed, Alt not: AltGr is Ctrl + Alt) or 0 for 100 %. 70–180 % in 10 % steps, every window at once.
+  `UiZoom.Track(window)` wraps the window's content in a `LayoutTransformControl`, so layouts see the room they really
+  have. Small wheel deltas (touchpads, smooth wheels, pinching on a Windows touchpad) add up to one step per whole notch.
+  Windows that can't be resized grow with the zoom (their designed width × the zoom) up to their screen, cap their
+  height to it and scroll; the engine setup keeps itself on screen and scrolls its own list (`fitsItself`).
+  Tracked: the main window, the preset, group, rename and merge-order editors, the engine setup, LibreOffice options,
+  close, sponsor, what's new and update-progress windows and `WindowService`'s message dialog. Not tracked, so at
+  100 %: the donut (it has its own size), the toast and the corner notices (update, engine update, feedback, format
+  request, elevation), which are placed in a screen corner like system notifications, and the crop overlay, whose
+  wheel zooms the crop. Drop-down lists, context menus and tooltips open in their own popup windows outside the
+  transform and stay at 100 % too. The size is `UiScale` in settings.json (1 when missing, so no schema step); it is
+  written by `UserDataStore.SaveUiScale` 0.6 s after the last change (and on exit), without raising `SettingsChanged`.
 
 ## "What's new" slides
 

src/Filee.App/App.axaml.cs

@@ -68,6 +68,19 @@ private void Start(IClassicDesktopStyleApplicationLifetime desktop)
         var loc = AppHost.Get<LocalizationService>();
         loc.Attach(this);
         ApplySettings(store.Settings);
+        // Window zoom: set once here, not with the other settings, since the zoom saves itself (UiZoom) without
+        // raising SettingsChanged.
+        UiZoom.Configure(store.Settings.UiScale, scale =>
+        {
+            try
+            {
+                store.SaveUiScale(scale);
+            }
+            catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
+            {
+                log.LogWarning(ex, "Could not remember the window zoom");
+            }
+        });
         // Every engine's availability, checked once off the UI thread: the first donut or drop otherwise starts
         // every engine's check (FFmpeg -version, folder searches) on the UI thread and freezes it meanwhile.
         _ = AppHost.Get<ConverterCatalog>().CheckInBackgroundAsync();
@@ -150,6 +163,7 @@ private void Start(IClassicDesktopStyleApplicationLifetime desktop)
 
         desktop.Exit += (_, _) =>
         {
+            UiZoom.Flush();
             watchdog.Dispose();
             AppHost.Get<MemoryTrimmer>().Dispose();
             AppHost.Get<TriggerService>().Dispose();

src/Filee.App/Assets/i18n/ar.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "شفافية شريط الأدوات الدائري",
   "theme.reduce_motion": "تقليل الرسوم المتحركة",
   "theme.reduce_motion_hint": "موصى به للحواسيب القديمة. يعطّل الانتقالات وحركة ارتداد الشريط الدائري.",
+  "theme.window_size": "حجم النوافذ",
+  "theme.window_size_smaller": "أصغر",
+  "theme.window_size_larger": "أكبر",
+  "theme.window_size_reset": "إعادة تعيين",
+  "theme.window_size_hint": "يكبّر كل ما في نوافذ Filee أو يصغّره. في أي نافذة، يؤدي {0} + عجلة الفأرة و{0} + زائد / ناقص الأمر نفسه، ويعيد {0} + 0 الحجم إلى 100%.",
   "theme.preview": "معاينة",
   "engines.title": "محركات التحويل",
   "engines.description": "يختار Filee أفضل محرك متاح لكل تحويل.\nإذا أمكن لعدة محركات تنفيذ المهمة نفسها، تكون الأولوية للأعلى في القائمة.",

src/Filee.App/Assets/i18n/en.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "Donut toolbar opacity",
   "theme.reduce_motion": "Reduce animations",
   "theme.reduce_motion_hint": "Recommended for older PCs. Turns off transitions and the donut's bounce.",
+  "theme.window_size": "Window size",
+  "theme.window_size_smaller": "Smaller",
+  "theme.window_size_larger": "Larger",
+  "theme.window_size_reset": "Reset",
+  "theme.window_size_hint": "Makes everything in Filee's windows larger or smaller. In any window, {0} + mouse wheel and {0} + plus / minus do the same, and {0} + 0 goes back to 100%.",
   "theme.preview": "Preview",
 
   "engines.title": "Conversion engines",

src/Filee.App/Assets/i18n/es.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "Opacidad del menú circular",
   "theme.reduce_motion": "Reducir las animaciones",
   "theme.reduce_motion_hint": "Recomendado para PC antiguos. Desactiva las transiciones y el rebote del menú circular.",
+  "theme.window_size": "Tamaño de las ventanas",
+  "theme.window_size_smaller": "Más pequeño",
+  "theme.window_size_larger": "Más grande",
+  "theme.window_size_reset": "Restablecer",
+  "theme.window_size_hint": "Agranda o reduce todo en las ventanas de Filee. En cualquier ventana, {0} + rueda del ratón y {0} + más / menos hacen lo mismo, y {0} + 0 vuelve al 100 %.",
   "theme.preview": "Vista previa",
   "engines.title": "Motores de conversión",
   "engines.description": "Filee elige el mejor motor disponible para cada conversión.\nCuando varios pueden hacer el mismo trabajo, gana el que está más arriba.",

src/Filee.App/Assets/i18n/fr.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "Opacité du menu circulaire",
   "theme.reduce_motion": "Réduire les animations",
   "theme.reduce_motion_hint": "Recommandé pour les PC anciens. Désactive les transitions et le rebond du menu circulaire.",
+  "theme.window_size": "Taille des fenêtres",
+  "theme.window_size_smaller": "Plus petit",
+  "theme.window_size_larger": "Plus grand",
+  "theme.window_size_reset": "Réinitialiser",
+  "theme.window_size_hint": "Agrandit ou réduit tout le contenu des fenêtres de Filee. Dans n'importe quelle fenêtre, {0} + molette de la souris et {0} + plus / moins font de même, et {0} + 0 revient à 100 %.",
   "theme.preview": "Aperçu",
 
   "engines.title": "Moteurs de conversion",

src/Filee.App/Assets/i18n/hi.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "डोनट टूलबार की अपारदर्शिता",
   "theme.reduce_motion": "एनिमेशन कम करें",
   "theme.reduce_motion_hint": "पुराने PC के लिए अनुशंसित। ट्रांज़िशन और डोनट की उछाल बंद कर देता है।",
+  "theme.window_size": "विंडो का आकार",
+  "theme.window_size_smaller": "छोटा",
+  "theme.window_size_larger": "बड़ा",
+  "theme.window_size_reset": "रीसेट करें",
+  "theme.window_size_hint": "Filee की विंडो में सब कुछ बड़ा या छोटा दिखाता है। किसी भी विंडो में {0} + माउस व्हील और {0} + प्लस / माइनस से भी यही होता है, और {0} + 0 से वापस 100% हो जाता है।",
   "theme.preview": "प्रीव्यू",
   "engines.title": "कन्वर्ज़न इंजन",
   "engines.description": "Filee हर कन्वर्ज़न के लिए उपलब्ध सबसे अच्छा इंजन चुनता है।\nजब कई इंजन एक ही काम कर सकते हैं, तो ऊपर वाला चुना जाता है।",

src/Filee.App/Assets/i18n/ja.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "ドーナツメニューの不透明度",
   "theme.reduce_motion": "アニメーションを減らす",
   "theme.reduce_motion_hint": "古いPCにおすすめです。画面切り替え時のアニメーションと、ドーナツメニューの弾む動きを無効にします。",
+  "theme.window_size": "ウィンドウのサイズ",
+  "theme.window_size_smaller": "小さく",
+  "theme.window_size_larger": "大きく",
+  "theme.window_size_reset": "リセット",
+  "theme.window_size_hint": "Filee のウィンドウ内のすべてを大きく、または小さく表示します。どのウィンドウでも {0} + マウスホイール、{0} + プラス / マイナスで同じ操作ができ、{0} + 0 で 100% に戻ります。",
   "theme.preview": "プレビュー",
   "engines.title": "変換エンジン",
   "engines.description": "Fileeは変換ごとに、利用可能な最適なエンジンを選びます。\n同じ変換ができるエンジンが複数ある場合は、一覧で上にあるものが優先されます。",

src/Filee.App/Assets/i18n/ko.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "원형 툴바 불투명도",
   "theme.reduce_motion": "애니메이션 줄이기",
   "theme.reduce_motion_hint": "저사양 PC에 권장해요. 전환 효과와 도넛의 튕김 효과를 꺼요.",
+  "theme.window_size": "창 크기",
+  "theme.window_size_smaller": "작게",
+  "theme.window_size_larger": "크게",
+  "theme.window_size_reset": "초기화",
+  "theme.window_size_hint": "Filee 창의 모든 것을 크게 또는 작게 보여 줘요. 어느 창에서든 {0} + 마우스 휠, {0} + 더하기 / 빼기로도 바꿀 수 있고, {0} + 0을 누르면 100%로 돌아가요.",
   "theme.preview": "미리보기",
 
   "engines.title": "변환 엔진",

src/Filee.App/Assets/i18n/ne.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "डोनट टुलबार अपारदर्शिता",
   "theme.reduce_motion": "एनिमेसन कम गर्नुहोस्",
   "theme.reduce_motion_hint": "पुराना कम्प्युटरहरूका लागि सिफारिस गरिन्छ। ट्रान्जिसन र डोनटको बाउन्स बन्द गर्दछ।",
+  "theme.window_size": "विन्डोको आकार",
+  "theme.window_size_smaller": "सानो",
+  "theme.window_size_larger": "ठूलो",
+  "theme.window_size_reset": "रिसेट गर्नुहोस्",
+  "theme.window_size_hint": "Filee का विन्डोहरूमा सबै कुरा ठूलो वा सानो देखाउँछ। जुनसुकै विन्डोमा {0} + माउस ह्वील र {0} + प्लस / माइनसले पनि यही गर्छ, र {0} + 0 ले 100% मा फर्काउँछ।",
   "theme.preview": "पूर्वावलोकन",
   "engines.title": "रूपान्तरण इन्जिनहरू",
   "engines.description": "Filee ले प्रत्येक रूपान्तरणका लागि उपलब्ध उत्तम इन्जिन छान्दछ।\nजब धेरैले उही काम गर्न सक्छन्, माथि भएको इन्जिनले प्राथमिकता पाउँछ।",

src/Filee.App/Assets/i18n/pl.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "Krycie paska-pierścienia",
   "theme.reduce_motion": "Ogranicz animacje",
   "theme.reduce_motion_hint": "Zalecane na starszych komputerach. Wyłącza przejścia i odbijanie pierścienia.",
+  "theme.window_size": "Rozmiar okien",
+  "theme.window_size_smaller": "Mniejsze",
+  "theme.window_size_larger": "Większe",
+  "theme.window_size_reset": "Resetuj",
+  "theme.window_size_hint": "Powiększa lub pomniejsza całą zawartość okien Filee. W każdym oknie to samo robią {0} + kółko myszy i {0} + plus / minus, a {0} + 0 przywraca 100%.",
   "theme.preview": "Podgląd",
 
   "engines.title": "Silniki konwersji",

src/Filee.App/Assets/i18n/pt-BR.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "Opacidade do menu circular",
   "theme.reduce_motion": "Reduzir animações",
   "theme.reduce_motion_hint": "Recomendado para PCs mais antigos. Desliga as transições e o salto do menu.",
+  "theme.window_size": "Tamanho das janelas",
+  "theme.window_size_smaller": "Menor",
+  "theme.window_size_larger": "Maior",
+  "theme.window_size_reset": "Redefinir",
+  "theme.window_size_hint": "Deixa tudo nas janelas do Filee maior ou menor. Em qualquer janela, {0} + roda do mouse e {0} + mais / menos fazem o mesmo, e {0} + 0 volta para 100%.",
   "theme.preview": "Prévia",
 
   "engines.title": "Motores de conversão",

src/Filee.App/Assets/i18n/ru.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "Непрозрачность кругового меню",
   "theme.reduce_motion": "Меньше анимации",
   "theme.reduce_motion_hint": "Рекомендуется для старых компьютеров. Отключает переходы и подпрыгивание кругового меню.",
+  "theme.window_size": "Размер окон",
+  "theme.window_size_smaller": "Меньше",
+  "theme.window_size_larger": "Больше",
+  "theme.window_size_reset": "Сбросить",
+  "theme.window_size_hint": "Увеличивает или уменьшает всё в окнах Filee. В любом окне то же делают {0} + колесо мыши и {0} + плюс / минус, а {0} + 0 возвращает 100%.",
   "theme.preview": "Предпросмотр",
 
   "engines.title": "Движки конвертации",

src/Filee.App/Assets/i18n/th.json

@@ -665,6 +665,11 @@
   "theme.donut_opacity": "ความทึบแสงของแถบโดนัท",
   "theme.reduce_motion": "ลดการเคลื่อนไหว (แอนิเมชัน)",
   "theme.reduce_motion_hint": "แนะนำสำหรับคอมพิวเตอร์รุ่นเก่า จะปิดเอฟเฟกต์การเปลี่ยนผ่านและการเด้งของโดนัท",
+  "theme.window_size": "ขนาดหน้าต่าง",
+  "theme.window_size_smaller": "เล็กลง",
+  "theme.window_size_larger": "ใหญ่ขึ้น",
+  "theme.window_size_reset": "รีเซ็ต",
+  "theme.window_size_hint": "ขยายหรือย่อทุกอย่างในหน้าต่างของ Filee ในหน้าต่างใดก็ได้ {0} + ล้อเมาส์ และ {0} + บวก / ลบ ก็ทำได้เหมือนกัน ส่วน {0} + 0 จะกลับไปที่ 100%",
   "theme.preview": "ตัวอย่าง",
   "engines.title": "เครื่องมือแปลงไฟล์",
   "engines.description": "Filee จะเลือกเครื่องมือที่ดีที่สุดที่พร้อมใช้งานสำหรับการแปลงแต่ละครั้ง\nหากมีหลายเครื่องมือที่ทำหน้าที่เดียวกันได้ เครื่องมือที่อยู่อันดับสูงกว่าจะถูกนำมาใช้",

src/Filee.App/Assets/i18n/zh-CN.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "环形工具栏不透明度",
   "theme.reduce_motion": "减少动画",
   "theme.reduce_motion_hint": "适合配置较低的电脑。关闭过渡效果和圆环的弹跳效果。",
+  "theme.window_size": "窗口大小",
+  "theme.window_size_smaller": "缩小",
+  "theme.window_size_larger": "放大",
+  "theme.window_size_reset": "重置",
+  "theme.window_size_hint": "放大或缩小 Filee 窗口中的所有内容。在任意窗口中，{0} + 鼠标滚轮和 {0} + 加号 / 减号也能调整，{0} + 0 恢复为 100%。",
   "theme.preview": "预览",
 
   "engines.title": "转换引擎",

src/Filee.App/Assets/i18n/zh-TW.json

@@ -681,6 +681,11 @@
   "theme.donut_opacity": "環形工具列不透明度",
   "theme.reduce_motion": "減少動畫",
   "theme.reduce_motion_hint": "適合效能較低的電腦。關閉轉場效果和圓環的彈跳效果。",
+  "theme.window_size": "視窗大小",
+  "theme.window_size_smaller": "縮小",
+  "theme.window_size_larger": "放大",
+  "theme.window_size_reset": "重設",
+  "theme.window_size_hint": "放大或縮小 Filee 視窗中的所有內容。在任何視窗中，{0} + 滑鼠滾輪和 {0} + 加號 / 減號也能調整，{0} + 0 會恢復為 100%。",
   "theme.preview": "預覽",
 
   "engines.title": "轉換引擎",