M1: layers and assets panels behaviour suite and fixes

A behaviour suite for the layers panel and the Assets panel written from the public documentation
(table rows with one-line derivations; rows the documentation is silent on say so and pin today's
behaviour), and the fixes it found.

- Engine suite `crates/engine/src/panels_behaviour_tests.rs` (6 tests, about 50 rows): reordering
  and moving layers into frames, groups and auto layout, refused drops, renaming several layers,
  show/hide and lock rules, pages and dividers, Assets folders, hidden-from-publishing names, drops.
- Panel suite `crates/ui-egui/src/layers_behaviour_tests.rs` (5 tests, driven through egui
  headless): click / Shift range / Cmd-Ctrl toggle, Alt-click expand, Collapse layers, sweeping
  across eyes and padlocks, the Rename layers dialog, dragging pages, dividers.

Fixes:
- Several layers dropped together in the layers panel land together at the drop point (layers
  from apart split around it before).
- Collapse layers (Alt+L) keeps the rows leading to the selection open (it closed everything).
- The eye and padlock no longer vanish when the pointer reaches them (the row lost its hover to
  them, so clicks could miss); dragging across eyes or padlocks sets every row passed in one undo
  step. Layers inside a locked frame show a faint padlock.
- Several layers selected + Cmd/Ctrl+R / F2 / Rename open a Rename layers dialog (Match, Rename to,
  Current name / Number up / Number down buttons, start value, preview) instead of renaming the top
  row only.
- `object.batchRename`: `$n` counts up and `$N` down (they were swapped), `$nnn` pads, `start`
  sets where numbers start/stop, `regex: true` matches a regular expression with `$1`..`$9`,
  `` $` `` and `$'`, and codes work in the replacement too. Returns the new names.
- Pages: dragged up and down the list to reorder; a blank page named with a leading hyphen is a
  divider (drawn as a line, never opened, holds no layers); duplicates are named "Copy of ...";
  the last page that isn't a divider can't be deleted. `page.list` reports `divider`.
- Assets panel: components filed in folders by page, the frames holding them and the slash parts
  of their names (folders fold away; open while searching), tiles show the last name part;
  `component.list` gives each component's `folder` and `label` for agents.
- Publishing: a leading `.` or `_` keeps a component (style, collection) out of a library even
  after it was published, and removing the prefix brings it back (the previous publish's choice
  won before).

The engine gains the `regex` crate (already in the lock file through env_logger) for the
documented regular-expression matching.

docs/target-app-parity.md

@@ -1,6 +1,6 @@
 # FigCraft parity with Figma
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%; last major: full re-measure against Figma desktop 126.10.7) · **Target:** Figma Design (desktop app 126.10.7, macOS)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (layers and assets panels behaviour suite and fixes; vector multi-edit and edit tail; dev resources links; extended collections tail; branch version history and finer list merges; headline percentages recomputed from the area table: feature breadth ~84%, core ~94%, mainstream ~50%; text lists, hanging punctuation and decoration styles; comments and version history behaviour suite and fixes; canvas navigation, guides and grids behaviour suite and fixes; export and inspect behaviour suite and fixes; .fig import: editable vector networks and more layer kinds; shapes and vector behaviour suite and fixes; paint and effects behaviour suite and fixes; frames, groups, sections and masks behaviour suite and fixes; styles and variables behaviour suite and fixes; prototyping behaviour suite and fixes; components behaviour suite and fixes; embedded image colour profiles; layers panel keyboard: F2 rename, Shift+F10 context menu, keyboard box selection, 10k-layer QA; per-side stroke weight variables; text behaviour suite: CJK line breaking, metrics, vertical trim; selection and transform behaviour suite and fixes; `.fig` import, best effort; auto layout behaviour suite and fixes; Display P3: gamut warning and soft-proof (true P3 blocked upstream); several windows; localization layer with a draft Spanish catalog; hosting figcraft-server: wss in the desktop app, server releases, deployment guide; plugin panels and settings; canvas fixes: boolean hit testing on the result, group drags, frame outlines and slices; code connect; stretch and scatter brushes, pen pressure; text on a path and pattern fills; team libraries on the server and swap library; branches: create, update from main, review and merge; animated GIF fills and TIFF images; Open recent, outlines for the selection and mask outlines: menu breadth 100%; extended collections, variables import/export, gradient stop and variant bindings; feature breadth ~80%; ready ~49%; last major: full re-measure against Figma desktop 126.10.7) · **Target:** Figma Design (desktop app 126.10.7, macOS)
 
 The authoritative assessment of how close FigCraft is to Figma Design. [`ROADMAP.md`](../ROADMAP.md)
 summarizes it; [`gaps.md`](gaps.md) is the ranked work list; the measured menu checklist is
@@ -96,7 +96,7 @@ Breadth: does it exist. Ready: depth, correctness and fidelity for real projects
 |---|---|---|---|---|---|---|
 | 1 | Canvas & navigation | 6 | 98% | 74% | Outline mode's Include hidden layers and Include object bounds, Display P3 on screen, QA at extreme zooms (behaviour suite for navigation, rulers, guides, layout grids and outline mode landed: guide selection, Auto grid counts, outline-mode clicks) | 1–4 |
 | 2 | Selection & transform | 8 | 97% | 72% | Handles, measuring and snapping checked tool by tool against Figma and real files (snap distance, handle reach, cursors); children turned off a right angle scale without skew, approximately (behaviour suite from the documentation, rotated groups and mixed selections, equal spacing snapping, Cmd/Ctrl to ignore constraints and marquees inside frames landed) | 3–5 |
-| 3 | Layers panel | 5 | 98% | 82% | QA with long real files (keyboard box selection, F2 rename, Shift+F10 context menu and 10k-layer reveal/expand/collapse/arrow timings landed) | 1–2 |
+| 3 | Layers panel | 5 | 99% | 85% | QA with long real files (behaviour suite from the documentation, Rename layers dialog, sweeping eyes and padlocks, page dragging and dividers, several layers dropped together, keyboard box selection, F2 rename, Shift+F10 context menu and 10k-layer timings landed) | 1–2 |
 | 4 | Shapes & vector | 8 | 99% | 73% | Corner smoothing on polygons, stars and vectors; the transform box around points of several layers; per-point caps and joins on dashed, variable-width and brush strokes; vector QA with real files (behaviour suites from the documentation, corner radius and star ratio handles, rounded vector points drawn, also beside curved segments, a cap and join per point, several handles dragged together, cut and paint bucket drags, delete and heal along the curve, a boolean group's look by operation and the miter angle landed) | 1–3 |
 | 5 | Paint | 7 | 90% | 71% | Video fills, wide-gamut canvas, HEIC images; plus darker in PDF (behaviour suite from the documentation, pass-through and isolating groups, clipping frames that don't isolate, plus darker, animated GIF fills, TIFF images and embedded image colour profiles landed) | 2–5 |
 | 6 | Strokes | 3 | 95% | 75% | Stroke QA with real files (colour styles on strokes, stroke weight and per-side weight variables, brush strokes landed, see 20) | 1–2 |
@@ -612,6 +612,7 @@ Carried over from the ROADMAP's "Shipped so far" (2026-10-10). The test count th
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-12 | minor | Layers and Assets panels behaviour suite written from the public documentation (6 engine tests with about 50 table rows and 5 panel tests driven through the UI; about 30 rows that the code before the fixes contradicts) and its fixes: several layers dropped together in the layers panel land together (layers from apart split around the drop point); Collapse layers keeps the selection's rows open (it closed everything); the eye and padlock stay under the pointer (they vanished as it reached them, so clicks could miss) and dragging across them sets several layers in one undo step; several layers selected open a Rename layers dialog (match as text or a regular expression, Rename to, current name and number buttons, a start value, preview) instead of renaming the top one; `object.batchRename` counts `$n` up and `$N` down (they were swapped), pads with `$nnn`, takes `start`, regular expressions with `$1`…`$9`, `` $` `` / `$'` and codes in the replacement; pages are dragged to reorder, a blank page named with a hyphen is a divider (never opened, holds no layers), duplicates are named "Copy of …", the last page that isn't a divider can't be deleted; the Assets panel files components by page, frame and slash names in folders that fold away (`component.list` gives each `folder`); a leading `.` or `_` now keeps a component out of the library even after it was published, and removing it brings the component back. Pinned where the documentation is silent: Alt-click on an arrow, numbering in stacking order, hidden layers and locked frames taking drops, locking deselects. Layers panel 98%/82% → 99%/85%; percentages and full parity hours unchanged at this rounding |
 | 2026-10-12 | minor | Vector multi-edit and the vector edit tail, with a behaviour suite written from the public documentation (5 tests, about 30 table rows and steps, and a junk-parameter sweep of every vector command in multi-edit mode): several vector layers are edited at once (Enter, double-click or `vector.edit.begin {ids}`; a press on another layer's point, handle or segment makes it the active layer; Shift-click, marquee and lasso select across layers; dragging, the arrows, Delete, delete and heal, mirroring, smoothing, corner radius and point caps and joins reach every layer's selected points in one undo step; the pen, bend, paint bucket, cut and eraser work in the active layer); several Bezier handles are selected with Shift-click and dragged together (`vector.edit.moveHandles`); a sharp point next to a curved segment rounds (the curve is cut where the arc meets it and keeps its shape); a point can have its own stroke cap and join (`vector.edit.strokeCap`, `vector.edit.strokeJoin`, the Point section of the Design panel; canvas, PNG, SVG and PDF, outline stroke); the Pen outside edit mode connects to one of its own points and ends the path, and continues a selected open path from an end point. Left: corner smoothing beyond rectangles, the transform box around points of several layers, per-point caps and joins on dashed, variable-width and brush strokes. Shapes & vector 98%/72% → 99%/73%, 2–4 h → 1–3 h; Figma Draw extras 80%/55% → 88%/60%, 2–5 h → 1–3 h (gap 9: pen pressure on macOS and Linux tablets left). Totals recomputed by the doc's method, which rows since the last recompute had left stale: the area table's weighted breadth is 83.7% (~83%; core 94.1%, ~94%) and ready 63.1% (~63%; core 72.1%, ~72%), hours 133–284 (core 38–83); Features (depth) 61% → 63%, 46–94 h → 34–76 h; ready for real work 52.6% (~52%); mainstream weekly areas 71.0% → 72.1% (× 0.9 × 0.9 × 0.85 = 49.7%, ~49%, rounded down); essentials unchanged (~57%); full parity ~306–595 h → ~294–572 h (on top of the rows merged since: ~301–587 h → ~289–564 h; area-table totals recomputed on the merged table and rounded down: breadth ~84%, ready ~63%, core ~94%/~72%, mainstream weekly areas 72.4%, ~49%) |
 | 2026-10-12 | minor | Dev resources (gap 16): links for developers (a URL and a name) on any layer: `devResource.add` / `edit` / `remove` / `list`, undoable, saved and synced; an instance also lists its main component's (and that component's set's) links read-only with where they come from, and layers inside an instance show their main layer's; URLs are checked as web links (http or https, a host, no spaces, at most 2,048 characters) and never fetched (a link added without a name is named after its URL), opened only when clicked; the Inspect tab lists, adds, edits and removes them; `get_node` and `inspect_document` return them as `devResources`. The editor extension stays out of scope (the MCP server serves agents and editors). Dev Mode breadth 93% → 96%, ready 70% → 72%, 1–3 h → 0–1 h; feature breadth (~82%) and ready for real work (~51%) unchanged at this rounding; full parity ~304–593 h → ~303–591 h |
 | 2026-10-12 | minor | Extended collections' tail (gap 14): variables a library adds to a collection this file extends now count as a library update of their own (listed by name without a copy yet) and arrive inheriting when accepted, instead of waiting for the library's next other update; a library collection that is itself an extended collection can be extended again, values flowing down the chain as each file accepts updates with every level's overrides kept (checked end to end). Styles & variables breadth 94% → 95%, ready unchanged (76%), 3–5 h → 2–4 h; gap 14 1–2 h → 0–1 h (real-library checks left); feature breadth (~82%) and ready for real work (~51%) unchanged at this rounding; full parity ~305–594 h → ~304–593 h |