PoC 2 & 3: Yoga WASM layout + Kiwi codec
Yoga WASM (yoga-layout v3.2.1):
- Vertical/horizontal auto-layout with gap, padding, alignment ✅
- Nested frames with flex-grow ✅
- Space-between distribution ✅
- 1000-node layout in 3ms ✅
Kiwi binary codec (from figma-use multiplayer module):
- 194-definition Figma schema (2178 lines) compiles in 6ms
- Encode 4 nodes → 237 bytes Zstd-compressed
- Full round-trip: encode → Zstd compress → decompress → decode ✅
- Patch kiwi-schema to allow sparse field IDs (Figma uses IDs > 312)
Extracted files: schema.ts, codec.ts, protocol.ts, client.ts, index.ts
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