test(react-ui): add page render-smoke specs, reset the coverage gate#10122
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The UI coverage gate was tightened to 0.1pp against a fast-local measurement (39.86% baseline); CI's slower runners measure ~0.9pp lower, so tests-ui-e2e failed there. UI e2e coverage is diffusely non-deterministic and tracks machine speed — a 0.1pp band can't hold across environments. Rather than loosen the gate, raise the floor under it: a render-smoke spec mounts each lazy page (navigate + assert the header renders), covering a dozen previously-untested pages and lifting coverage from ~39% to ~42.7% locally. Restore the tolerance to 0.8pp and set the baseline conservatively (40.0), below the slow-CI floor, so the ratchet holds without flapping. Document the coverage policy — install the git hooks and don't bypass them (no --no-verify, no hand-lowering the baseline or widening the tolerance); raise coverage by adding tests instead; set the UI baseline below the slow-CI floor — in AGENTS.md, CONTRIBUTING.md and .agents/building-and-testing.md. Assisted-by: Claude:claude-opus-4-8 [Claude Code] Signed-off-by: Richard Palethorpe <io@richiejp.com>
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Jun 1, 2026
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Description
Bump the test coverage to fix CI with some smoke tests.
Also recommend that agents install the commit hooks and actually run them. Otherwise LLMs reason there way out of it (in fact they still do even with this, but it reduces the probability of it).
Notes for Reviewers
The UI coverage gate was tightened to 0.1pp against a fast-local
measurement (39.86% baseline); CI's slower runners measure ~0.9pp lower,
so tests-ui-e2e failed there. UI e2e coverage is diffusely
non-deterministic and tracks machine speed — a 0.1pp band can't hold
across environments.
Rather than loosen the gate, raise the floor under it: a render-smoke
spec mounts each lazy page (navigate + assert the header renders),
covering a dozen previously-untested pages and lifting coverage from
~39% to ~42.7% locally. Restore the tolerance to 0.8pp and set the
baseline conservatively (40.0), below the slow-CI floor, so the ratchet
holds without flapping.
Document the coverage policy — install the git hooks and don't bypass
them (no --no-verify, no hand-lowering the baseline or widening the
tolerance); raise coverage by adding tests instead; set the UI baseline
below the slow-CI floor — in AGENTS.md, CONTRIBUTING.md and
.agents/building-and-testing.md.
Assisted-by: Claude:claude-opus-4-8 [Claude Code]
Signed-off-by: Richard Palethorpe io@richiejp.com
Signed commits