fix(01-03): render a closure frame per blink and record viseme peaks

test(01-07): prove the gate, the tier fallback and push-to-talk under both transports

feat(01-07): add tiered browser ASR and wire push-to-talk into the shared turn loop

feat(01-07): add push-to-talk capture with a three-condition pre-ASR gate

feat(01-06): drive the standalone harness from the generated timeline

feat(01-06): add the golden timeline fixture and its regenerator

test(01-06): add the five build_timeline pipeline tests against real fixtures

feat(01-06): add the viseme mapping table and banker's frame quantisation

test(01-06): add failing tests for the vowel table and banker's frame quantisation

test(01-03): enforce the transport seam statically and in a real browser

test(01-04): capture ground-truth synthesis fixtures for AVTR-02

feat(01-04): implement synthesize() and the shared voice dataclasses

test(01-02): add deterministic silence and cafe-noise audio fixtures

test(01-02): add shared fixtures and --space-url plumbing

chore(01-02): bootstrap Python 3.12 toolchain, Git LFS and package skeleton