Bridge correctness and responsive visual hardening.

Unresolved Hydra/OmegaConf interpolation can no longer reach a runnable
recipe. Bridge outputs are stem-specific and published transactionally
behind an exclusive per-stem reservation, with --overwrite required to
replace an existing family. bridge doctor reports explicit tokenizer
verification levels and separates portable-metadata, dataset-content and
model-weight privacy, where not_inspected never means passed. The
Alignment Lab figures are readable at 390 px through real vertical
layouts, metric coverage became an accessible responsive table, and the
browser visual gate now measures actual rendered geometry.

Every frozen scientific artifact remains byte-identical. No distributed
verl execution and no OPD/PPO semantic parity is claimed.