v0.9.1

## 🏗️ Pascal Editor v0.9.1 — Preset System, Rooms & Templates, Building Manipulation

This release ships a first-class **preset system**, **room presets & template scans**, a deep **building-manipulation overhaul** (rotation, unified handles, tap-to-engage move), **editor sound design**, **viewer shadow improvements**, and a full **dependency/security refresh**. It also publishes the npm packages announced in v0.9.0 — everything lands on the registry as 0.9.1.

### ✨ Features

- **Preset system** — capture builds as presets with framing + zoom-limited thumbnails, browse them in a hierarchical function-tree with an icon-grid category bar, and place them with parameters, move tool, shadows, isolation, and a green/red validity box ([#341](https://github.com/pascalorg/editor/pull/341), [#344](https://github.com/pascalorg/editor/pull/344), [#345](https://github.com/pascalorg/editor/pull/345), [#349](https://github.com/pascalorg/editor/pull/349), [#354](https://github.com/pascalorg/editor/pull/354), [#357](https://github.com/pascalorg/editor/pull/357), [#366](https://github.com/pascalorg/editor/pull/366))
- **Rooms & templates** — save furnished rooms as reusable presets; template scans feed the same workflow ([#390](https://github.com/pascalorg/editor/pull/390))
- **Building manipulation overhaul** — whole-building rotation with world-grid alignment, alt-click single-wall selection, tap-to-engage move ([#388](https://github.com/pascalorg/editor/pull/388)); live floor-stacking previews, unified handle system + hit areas, NaN-safe node mutations ([#375](https://github.com/pascalorg/editor/pull/375)); persistent site boundary handles ([#386](https://github.com/pascalorg/editor/pull/386)); alignment guides + floor-plan/3D placement parity ([#372](https://github.com/pascalorg/editor/pull/372)); level-scoped alignment, reference-floor symbols & registry slab tool ([#373](https://github.com/pascalorg/editor/pull/373))
- **Studio mode & inspector UX** — studio mode, consolidated Display + References controls ([#364](https://github.com/pascalorg/editor/pull/364), [#370](https://github.com/pascalorg/editor/pull/370)); build sidebar + slimmed items panel for the standalone editor ([#361](https://github.com/pascalorg/editor/pull/361)); vertical icon rail + headless inspector footer slot ([#350](https://github.com/pascalorg/editor/pull/350))
- **Sound design** — structure build start/end cues, menu hover/click SFX ([#378](https://github.com/pascalorg/editor/pull/378)); per-kind delete sounds incl. shelf items ([#379](https://github.com/pascalorg/editor/pull/379), [#381](https://github.com/pascalorg/editor/pull/381))
- **Roof accessories** — gutters, downspouts & vents with gizmos ([#355](https://github.com/pascalorg/editor/pull/355))
- **Viewer shadows** — shadow frustum fitted to building geometry and centered on focus ([#347](https://github.com/pascalorg/editor/pull/347), [#348](https://github.com/pascalorg/editor/pull/348))
- **Fence presets** — tool-defaults seeding + `drawTool` capability ([#346](https://github.com/pascalorg/editor/pull/346))

### 🐛 Fixes

- Camera ↔ floor-plan navigation sync, both directions ([#387](https://github.com/pascalorg/editor/pull/387))
- Editor interaction, loading, walkthrough, and IFC cleanup ([#385](https://github.com/pascalorg/editor/pull/385))
- Relative move grab offsets + fresh placement commits ([#383](https://github.com/pascalorg/editor/pull/383))
- Stair openings, roof-segment grid snap, 3D box selection, unit-aware alignment guides ([#380](https://github.com/pascalorg/editor/pull/380))
- Slab side walls render solid regardless of polygon winding ([#377](https://github.com/pascalorg/editor/pull/377)); outline polygon edit handles + vertex grab ([#365](https://github.com/pascalorg/editor/pull/365))
- Null-safety hardening across placement, cursor groups, box-select, and container renderers ([#313](https://github.com/pascalorg/editor/pull/313), [#323](https://github.com/pascalorg/editor/pull/323), [#333](https://github.com/pascalorg/editor/pull/333), [#342](https://github.com/pascalorg/editor/pull/342), [#359](https://github.com/pascalorg/editor/pull/359)); legacy door nodes normalized against the schema ([#303](https://github.com/pascalorg/editor/pull/303))
- Nodes test suite repaired under bun ([#360](https://github.com/pascalorg/editor/pull/360)); stale registry + stair-opening tests updated ([#358](https://github.com/pascalorg/editor/pull/358))

### 🧰 Infrastructure

- CI: lint + typecheck workflow ([#369](https://github.com/pascalorg/editor/pull/369))
- June 2026 dependency refresh — next 16.2.6 (12+ security advisories patched; 16.2.7 deliberately held back for a Turbopack dev route-matching regression), TypeScript 6.0.3 everywhere, single-three dedupe, dead-dependency removal ([#389](https://github.com/pascalorg/editor/pull/389))
- Architecture: enforced layer boundaries — ceiling dispatch, store relocation, shared helpers ([#382](https://github.com/pascalorg/editor/pull/382)); MCP plan↔world coordinate convention documented ([#356](https://github.com/pascalorg/editor/pull/356))

### 📦 Packages

| Package | Version |
|---|---|
| `@pascal-app/core` | `0.9.1` |
| `@pascal-app/viewer` | `0.9.1` |
| `@pascal-app/editor` | `0.9.1` |
| `@pascal-app/mcp` | `0.3.1` |
| `@pascal-app/ifc-converter` | `0.1.1` |

> The 0.9.0 versions announced in the previous release never reached npm — they ship here as 0.9.1.

### 🙏 Contributors

A huge thank you to our contributors for this release!

- [@sudhir9297](https://github.com/sudhir9297) — building-manipulation overhaul, alignment guides, level-scoped alignment & registry slab tool, layer-boundary architecture ([#388](https://github.com/pascalorg/editor/pull/388), [#372](https://github.com/pascalorg/editor/pull/372), [#373](https://github.com/pascalorg/editor/pull/373), [#382](https://github.com/pascalorg/editor/pull/382))
- [@wass08](https://github.com/wass08) — rooms & templates, the preset-system wave, studio mode, sound design, shadow improvements, and many fixes ([#390](https://github.com/pascalorg/editor/pull/390), [#387](https://github.com/pascalorg/editor/pull/387), [#385](https://github.com/pascalorg/editor/pull/385), [#378](https://github.com/pascalorg/editor/pull/378), [#364](https://github.com/pascalorg/editor/pull/364), [#357](https://github.com/pascalorg/editor/pull/357), [#354](https://github.com/pascalorg/editor/pull/354), [#341](https://github.com/pascalorg/editor/pull/341))
- [@anton-pascal](https://github.com/anton-pascal) — null-safety hardening wave across viewer, editor, and nodes ([#303](https://github.com/pascalorg/editor/pull/303), [#313](https://github.com/pascalorg/editor/pull/313), [#323](https://github.com/pascalorg/editor/pull/323), [#333](https://github.com/pascalorg/editor/pull/333), [#342](https://github.com/pascalorg/editor/pull/342))
- [@marcelgruber](https://github.com/marcelgruber) — MCP plan↔world coordinate convention docs ([#356](https://github.com/pascalorg/editor/pull/356))

**Full Changelog**: https://github.com/pascalorg/editor/compare/v0.9.0...v0.9.1