[oscar981-op]

Fixes #311.

Approach

Builds on the existing tool-default preferences instead of adding a second style system. The body of setAsDefaultStyle moved to js/core/style-prefs.js and is shared by both.

• Save: right-click → "Save to Tool Chest" captures every property except geometry, measured results, identity and links to other annotations.
  • The layer is stored by name and colour, so it carries over to other documents.
  • Line width and font size are stored without viewport scaling.
  • Supported: distance, area, perimeter, angle, line, arrow, polyline, polygon, rectangle, ellipse, cloud, filled area, wall.
• Panel (left sidebar): tool sets and items. Create, rename (F2 or double-click), delete (confirmation when not empty), move (drag or "Move to…"), export a set to .opdstools and import one.
• Use an item: clicking it starts its tool with the item's style laid over the preferences temporarily, so the preview and the tool use it.
  • The rest of the properties are applied to the next annotation through a recordAdd hook, so undo stays complete.
  • The unit is converted keeping the real length, and a missing layer is created.
  • The overlay is never saved, and it ends on a tool change or Esc.
• Import: checks format, version, item shape and size. Geometry, ids and prototype keys are stripped; unknown types are skipped. A name clash offers rename, overwrite or keep both.
• Persistence: its own app-data catalog file on desktop (opds-tool-chest), browser storage on web. It survives a preferences reset.
• Depth (requested in the issue, did not exist): measureDepth for distance, perimeter and area, with a computed surface or volume. Saved as OPS_Depth and loaded back.
• Real translations in all 40 locales.

Tests

• New: tool-chest.test.mjs, tool-chest-wiring.test.mjs, measure-depth.test.mjs, toolChestStore.test.mjs. They cover capture without geometry, applying a preset, tool set CRUD and rename, export/import round-trip and rejecting malformed files, and persistence.
• A depth round-trip was added in plattegrond-meta.test.mjs.
• Full suite: 0 failures. vite build and tsc are clean.

Not yet checked in the running app

• The panel, context menu and import dialog. HTML5 drag-and-drop in Tauri may be blocked; "Move to…" is the fallback.
• The live preview style for tools that don't read the preferences (angle, wall). They get the style only once the annotation is placed.
• The real file dialogs and .opdstools read/write.
• Esc ending the session (covered by a source test only).
• Depth through a full save and reopen (only the key round-trip is tested).

🤖 Generated with Claude Code