fix(chrome): reserve the smart-search hint in the phone mode-home composer slot - #2171
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…poser slot --spacing-mode-home-composer-phone reserved 106px while the settled block is 162px on every mode home. The 56px difference is the smart-search hint, which UniversalSearchCommandSurface renders inside that slot above the composer; the token was last measured as "composer pill plus privacy notice", before the hint existed. Under-reserving meant the slot grew when the portal adopted and pushed the action and pill stacks down — the layout shift chrome invariant 15 exists to prevent. Measured at 390px across six mode homes, before -> after: specifiers 0.0548 -> 0.0128 forms 0.0185 -> 0.0071 dsm 0.0465 -> 0.0108 factsheets 0.0170 -> 0.0045 therapy 0.0420 -> 0.0096 / 0.0196 -> 0.0051 The settled layout is unchanged: min-height now equals the settled height (162px), so only the pre-adoption reserve grows and committed visual baselines still match. This also makes the existing lighthouse-budget baseline correct for mobile-therapy-compass, whose recorded 0.000 predates Therapy having the hint at all — the graded gate measured 0.032 against it and would have inherited that red onto the next unrelated PR. The wide token is deliberately left short. Above sm the surface swaps the fixed phone ticket for a prompt-chip row that rewraps with viewport width (settled 160px at 1280, 199px at 800), so no single static value is correct everywhere; that needs a different mechanism and is tracked separately. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01W5HsA9TpWxAN6KbqFAx7GA
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Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk:⚪ Minimal · up to The phone-only reserve correction reduces layout shift without changing settled layouts. A minor documentation measurement inconsistency remains, but it has no runtime impact or merge-blocking risk. Possibly related PRs
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In `@src/app/globals.css`:
- Around line 123-133: Update the reserve explanation comment in globals.css so
the 56px increase is reconciled with the hint’s stated 48px height, explicitly
documenting the remaining 8px as spacing or padding if applicable; otherwise
correct the conflicting measurement. Keep the rationale consistent with the
162px (10.125rem) reserved height.
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src/app/globals.csstests/search-route-ownership.test.ts
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…ment The comment attributed the whole 56px increase to the smart-search hint and then described that hint as a fixed 48px row, without reconciling the two. Both numbers are right: the remaining 8px is the flex gap separating the hint from the composer (`gap-2` on `.universal-command-surface`; the `gap-1` in the same expression is the bottom-dock placement, not this slot). Comment only — the token, the measurements and the settled geometry are unchanged. Raised by CodeRabbit on PR #2171. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01W5HsA9TpWxAN6KbqFAx7GA
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Summary
--spacing-mode-home-composer-phonereserved 106px while the settled block is 162px on every mode home. The 56px difference is the smart-search hint, whichUniversalSearchCommandSurfacerenders inside that slot above the composer — the token was last measured as "composer pill plus privacy notice", before that hint existed. Under-reserving meant the slot grew when the portal adopted and pushed the action and pill stacks down: the layout shift chrome invariant 15 exists to prevent.min-heightnow equals the settled height, so only the pre-adoption reserve grows. Committed visual baselines still match, and the desktoptherapy-compassbaseline is untouched because thewidetoken is unchanged.main.lighthouse-budget'smobile-therapy-compasscell records0.000, which predates Therapy having the hint at all. Since fix(therapy): restore the shared search command surface on the Therapy home #2160 landed, the graded gate measures0.032against it — outside the 0.02 tolerance — so the next unrelated PR to run Lighthouse would have inherited that red as its own regression.ci.yml's own concurrency comment documents this exact failure mode happening on this exact route once before. Rather than refresh the baseline, this makes the recorded0.000correct again.Verification
npm run verify:pr-localFull unit suite inside that gate:
Test Files 682 passed (682)/Tests 7416 passed | 4 skipped (7420).Measured directly, instrumenting
layout-shiftPerformanceObserver entries at 390px against a dev server, before → after:/specifiers/dsm/therapy-compass//forms/factsheetsAll six settle at 162px, which is why one constant is exact rather than a per-route guess. Therapy's 0.0096 sits inside the 0.02 absolute tolerance against its
0.000baseline, solighthouse-budgetshould return to green without any baseline change.UI verification not run: the container's Playwright browser revision is 1194 against the 1234 this install expects (the known installed-lock drift), so
verify:uiandverify:phone-chromecannot run here. Browser proof is delegated to CI Production UI, plus the direct layout-shift measurements above. The reserve is a phone-only token, so thesm+journeys are unaffected by construction.Risk and rollout
sm+path is untouched.git revertthe single commit. No migration, no data change, no generated asset regenerated.Notes
The
widetoken is deliberately left short (88px reserved against a settled 160px at 1280 and 199px at 800) rather than raised to match. Abovesmthe surface swaps the fixed-height phone ticket for a prompt-chip row that rewraps with viewport width, so no single static value is correct at every width — a bigger constant would simply be wrong somewhere else. That needs a different mechanism (reserve the fixed row only, or render the hint server-side) and is tracked as an inbox request from the #2160 audit.🤖 Generated with Claude Code
https://claude.ai/code/session_01W5HsA9TpWxAN6KbqFAx7GA
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Summary by CodeRabbit
Bug Fixes
Tests