WO-5 T4/T5: WebGPU Gaussian-splat viewport, verified against real hardware

WO-5 T3: fix stage-readiness AND-semantics gap for the two-pipeline reality

WO-5 T2: browser client for miranda-transport, verified against real Rust bytes

WO-5 T1: rewire topology to the real Miranda-Engine architecture

WO-3 T6: compositor + acceleration/velocity-limited motion damper

Rebuild Miranda-Engine from scratch — real repo, real content