v0.12.1

Changed

• Raw Metal renderer — replaced RealityKit with a custom MTKView pipeline, eliminating 67.5% main thread blocking in re::DrawingManager::commitFrameInternal() and 13.5% VFX lock contention from ParticleEmitterComponent
• GPU procedural nebulae — fBm noise billboards rendered entirely in Metal fragment shaders, replacing RealityKit particle emitters
• Blinn-Phong lighting — sphere impostor nodes use analytical normal reconstruction with Blinn-Phong shading tuned for dark-background aesthetic
• Opaque rendering — fog baked into base_color in shaders instead of .transparent blending, avoiding GPU depth sorting of 55K+ triangles
• Search spotlight — suppressed recall glow on non-matching nodes for cleaner visual contrast
• EngramModels library extraction — core model types (Memory, Edge, Checkpoint, HookState) moved into a separate SPM target; EngramKit re-exports via @_exported import EngramModels
• Account UI — Apple and Google Sign-In via AuthenticationServices and GoogleSignIn-iOS, posting identity tokens to cloud sync backend
• Streaming graph load — batched node loading off main actor for faster initial render
• GraphRenderStore — bypass SwiftUI observation for 3D render data, reducing unnecessary view recomputation
• Project labels in 3D view — project name labels rendered in the 3D scene with tighter clustering
• Lattice dependency switched from local path to remote URL (0.4.0)

Fixed

• Node flicker during force simulation convergence
• FTS5 full-text search query handling
• GPU compute label batch sizing and edge buffer synchronization
• Drive-to-project camera animation