[ghostship25]

Goal

Three CAD-style editing operations in the Drawing tab — two of them already sitting there as disabled "Coming soon" placeholders — plus the ability to draw shapes by entering dimensions instead of dragging.

What's in this PR

Editing tools (Drawing tab → Edit group)

Tool	Behaviour
Offset	Type a distance (existing CAD input HUD, in the document's measured units) → click the side. Produces a parallel copy: lines/arrows/walls offset perpendicular, boxes/circles/regular polygons grow outward or shrink inward (click outside vs. inside), polyline/L-shape contours are offset along their angle bisectors so corners stay sharp. The distance is remembered while the tool is active, so you can keep clicking sides.
Stretch	Drag a crossing window over the corners that should move → click a base point → drag. Only the vertices inside the window move; the rest of the shape stays put (right edge of a rectangle extends, left edge stays). Works on lines, boxes/circles, polylines, freehand paths and point shapes.
Enlarge	Select objects → click the ribbon button (base point defaults to the selection centre) or click the canvas for a custom base point → type a factor (1.5, 0.5) + Enter. Live preview while typing; Escape restores the original geometry. Text scales with the shape, line weights stay unchanged.

Dimension input for shapes (Drawing tab → Draw group)

A click (instead of a drag) with Rectangle, Circle, Ellipse, Polygon or L-shape now opens the same CAD input HUD used by the line tool:

• 500,300 + Enter → rectangle 500 × 300 (width × height, in measured units)
• 240 + Enter → circle with Ø240, or a 150 × 150 square for the rectangle tool
• 100<45 (polar) and =400,300 (absolute) also work, matching the existing coord-input formats
• the shape follows the cursor quadrant, so you can still steer with the mouse while typing
• a live preview shows while you type; Escape or a new click cancels

The Draw-group tooltips now mention it: "Rectangle — click, then type e.g. 500,300 + Enter".

Implementation notes

• Geometry lives in three new pure, DOM-free modules with unit tests: js/annotations/offset-geometry.js, stretch-geometry.js, scale-geometry.js
• Tools follow the existing tool contract (onPointerDown/Move/Up/Escape/Deactivate, state._typeLengthCommit, recordAdd/recordBulkModify undo records, status-bar guidance)
• Ribbon buttons: the dr-offset/dr-stretch placeholders are replaced and dr-enlarge is added; registration in js/tools/tools/index.js
• Strings added to js/i18n/locales/en/ribbon.json only — other locales fall back to English (fallbackLng: 'en'), so no translations are blocked
• Read-only (PDF/A) and no-document states are handled the same way as the neighbouring tools

Acceptance criteria / verification

• npx tsc --noEmit — clean
• npm run test:unit — 2987 tests, 0 failures (25 new tests covering offset/stretch/scale geometry, added to scripts/unit-testlijst.txt)
• npx vite build — clean
• Manual browser run (npx vite) on a blank document:
  • typed 400,200 → rectangle measured 400 × 200 ✅
  • typed 240 on circle → Ø240 ✅, typed 150 on rectangle → 150 × 150 ✅
  • Offset 10 + click outside → copy grew 400×200 → 420×220 at −10 offset ✅
  • Stretch window on the right edge + drag 50 → width 400 → 450, x unchanged ✅
  • Enlarge 1.5 → 450×200 → 675×300 around the same centre ✅

Out of scope

Fillet, Chamfer and Spot Coord remain "Coming soon" placeholders, as before.

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Happy to re-work anything — I saw the note in CONTRIBUTING.md that a clear description is sometimes preferred over a code PR; this branch is meant to make the intent concrete and can be re-implemented against the current code if that is easier.

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[DutchSailor]

Thank you, @ghostship25! Your drawing tools are in release 2026.42.0 (#576) as one squashed commit under your name, together with review fixes: locked and hidden objects are not edited, arc segments are kept on stretch, enlarge and offset, measurement labels update after an edit, and an interrupted Enlarge preview is undoable. The PR is closed manually because the commits were squashed into the release.