Guide sketch patterns with live previews and editable offsets (#966)

Sketch Mirror, rectangular and circular Pattern, and Offset now show a green live preview that follows the selection and settings; OK commits, Cancel leaves the sketch unchanged. The shared dialogs show the current selection step and source counts, sources can be toggled with Ctrl/Cmd-click, cleared and reselected.

Offsets keep editable driving distance dimensions (One Side, Two Sides, Symmetric) that update the derived curves without moving the source, with undo/redo and save/reopen. Format 19: older files keep their fixed offsets.

New dialog labels in en, zh, ja, de and ko.

Fixes #696. Fixes #517.

assets/locales/de.json

@@ -9,6 +9,9 @@
   "dialog.edit_title": "{title} bearbeiten",
   "dialog.select": "↖ Auswählen",
   "dialog.selected_count": "↖ {count} ausgewählt",
+  "dialog.step": "Schritt",
+  "dialog.selection_step": "{step} von {total}: {input} auswählen",
+  "dialog.selection_guidance": "Wählen Sie eine Eingabe aus, um sie zu ändern. Klicken Sie auf ausgewählte Objekte, um sie zu entfernen; Strg/Cmd-Klick schaltet sie ebenfalls um. Prüfen Sie die Vorschau und drücken Sie dann OK.",
   "document.save_changes": "Änderungen in {name} speichern?",
   "document.unsaved_changes": "{name} enthält ungespeicherte Änderungen. Wenn Sie nicht speichern, gehen sie verloren.",
   "settings.msaa_applies_on_restart": "Die Kantenglättung wird beim nächsten Start von SolidCraft übernommen",

assets/locales/en.json

@@ -279,6 +279,9 @@
   "dialog.edit_title": "EDIT {title}",
   "dialog.select": "↖ Select",
   "dialog.selected_count": "↖ {count} selected",
+  "dialog.step": "Step",
+  "dialog.selection_step": "{step} of {total}: Select {input}",
+  "dialog.selection_guidance": "Select an input to change it. Click selected objects to remove them; Ctrl/Cmd-click also toggles them. Review the preview, then press OK.",
   "document.save_changes": "Save changes to {name}?",
   "document.unsaved_changes": "{name} has unsaved changes. If you don't save, they are lost.",
   "settings.msaa_applies_on_restart": "Anti-aliasing applies the next time SolidCraft starts",

assets/locales/ja.json

@@ -279,6 +279,9 @@
   "dialog.edit_title": "{title}を編集",
   "dialog.select": "↖ 選択",
   "dialog.selected_count": "↖ {count} 個選択中",
+  "dialog.step": "ステップ",
+  "dialog.selection_step": "{total} ステップ中 {step}: {input} を選択",
+  "dialog.selection_guidance": "入力欄を選んで変更します。選択済みのオブジェクトをクリックすると解除できます。Ctrl/Cmd を押しながらクリックしても切り替えられます。プレビューを確認してから OK を押してください。",
   "document.save_changes": "{name} への変更を保存しますか？",
   "document.unsaved_changes": "{name} には保存されていない変更があります。保存しない場合、変更内容は失われます。",
   "settings.msaa_applies_on_restart": "アンチエイリアスは次回 SolidCraft を起動したときに適用されます",

assets/locales/ko.json

@@ -9,6 +9,9 @@
   "dialog.edit_title": "{title} 편집",
   "dialog.select": "↖ 선택",
   "dialog.selected_count": "↖ {count}개 선택됨",
+  "dialog.step": "단계",
+  "dialog.selection_step": "{step}/{total} 단계: {input} 선택",
+  "dialog.selection_guidance": "변경할 입력을 선택하세요. 선택한 객체를 클릭하면 선택이 해제되며, Ctrl/Cmd를 누른 채 클릭해도 전환됩니다. 미리 보기를 확인한 다음 확인을 누르세요.",
   "document.save_changes": "{name}의 변경 사항을 저장하시겠습니까?",
   "document.unsaved_changes": "{name}에 저장되지 않은 변경 사항이 있습니다. 저장하지 않으면 변경 사항이 사라집니다.",
   "settings.msaa_applies_on_restart": "안티앨리어싱은 다음에 SolidCraft를 시작할 때 적용됩니다",

assets/locales/zh.json

@@ -279,6 +279,9 @@
   "dialog.edit_title": "编辑 {title}",
   "dialog.select": "↖ 选择",
   "dialog.selected_count": "↖ 已选择 {count} 个",
+  "dialog.step": "步骤",
+  "dialog.selection_step": "第 {step} 步，共 {total} 步：选择{input}",
+  "dialog.selection_guidance": "选择输入项进行修改。点击已选对象可取消选择；按住 Ctrl/Cmd 点击也可切换选择。检查预览后，再按“确定”。",
   "document.save_changes": "保存对 {name} 的更改？",
   "document.unsaved_changes": "{name} 有未保存的更改。如果不保存，将丢失这些更改。",
   "settings.msaa_applies_on_restart": "抗锯齿将在下次启动 SolidCraft 时生效",

assets/styles/ui/palettes.rs

@@ -44,6 +44,7 @@ impl Tokens {
             body_edge: Color32::from_rgb(40, 44, 52),
             manipulator: Color32::from_rgb(40, 110, 220),
             preview_add: Color32::from_rgb(112, 160, 226),
+            preview_sketch: Color32::from_rgb(32, 190, 96),
             preview_cut: Color32::from_rgba_unmultiplied_const(232, 84, 44, 110),
             cube_face: Color32::from_rgb(236, 239, 244),
             cube_border: Color32::from_rgb(85, 94, 110),