FileExplorer (sidebar)
- Workspace header label and the new-workspace / save-project icon
buttons now read from t('editor.fileExplorer.*').
- Per-board section: collapse / expand toggle, status dot tooltip
(Running / Compiled / Idle), per-board "new file" button, and the
composite "<board name> — click to edit" hover title (the board
name itself stays untranslated — it's a product noun like
"Arduino Uno").
- File rows: hover title with optional "(unsaved)" suffix,
unsaved-dot tooltip, and the right-click context menu's Rename /
Delete commands.
- Empty-state placeholder when no boards are on the canvas.
- The window.confirm() shown before deleting a file now reads from
t() too, so non-English users see the prompt in their language.
FileTabs (open-tabs strip above the editor)
- Per-tab close button title and the unsaved-changes dot tooltip.
- Inline confirm dialog when closing a modified file: prompt copy,
"Close anyway" and "Cancel" buttons.
Hand-translated for all 9 locales. Hotkey hints (Ctrl+S, Strg+S)
localised per German convention; other locales keep "Ctrl+S" as the
universally-recognised label.
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