feat(reports): leftover-map singular values on leftover-axis ticks independently of leftover-map axis share (v2.87.0)

[seonghobae]

Summary

• Caption leftover-axis ticks with persisted leftover-map singular values σ_k through leftoverMapAxisTickBadge independently of leftover-map axis share (ADR 0330 / v2.87.0).
• After make seed, leftover-axis ticks name persisted leftover-map singular values when leftoverMapAxisTickBadge returns a usable leftover-axis tick σ caption even when leftover-map axis share is omitted; click a leftover pair opens that post.
• Leftover-axis ticks stay leftover axis {k} tick {value} σ {singular} when σ_k is finite so they stay distinct from leftover-map comparison leftover-axis ticks leftover map comparison leftover axis {k} tick {value} σ {singular} (ADR 0329), from leftover-map comparison graphic leftover-map axis ticks leftover map comparison graphic leftover-map axis {k} tick {value} σ {singular} (ADR 0328), from leftover-map graphic leftover-map axis ticks leftover-map axis {k} tick {value} σ {singular} (ADR 0327), from leftover-axis leftover axis {k} σ {value} (ADR 0325), and from leftover-map graphic leftover-map axis leftover-map axis {k} σ {value} (ADR 0324).
• A missing, non-finite, or negative singular value omits that σ tick caption and keeps leftover axis {k} tick {value}. Rank-0 unused axes still name σ 0.00. Leftover-axis ticks never name leftover-map axis share. Do not invent σ_k from leftover-map axis share. Do not invent leftover-map axis share from σ_k.
• UI-only; no SQL; no new columns. Never invent a leftover score. Never invent a theta. Do not persist leftover-map inner product, cosine, or length. This increment does not change leftover-map comparison leftover-axis ticks.
• Stacked onto leftover-map comparison leftover-axis tick leftover-map singular values as leftoverMapCompareAxisTickBadge (feat/leftover-map-compare-axis-tick-badge-v2860 / feat(reports): leftover-map singular values on leftover-map comparison leftover-axis ticks independently of leftover-map axis share (v2.86.0) #870 @ b086d97). Leave this PR open for independent review. Do not squash-merge onto the unprotected leftover base. Do not self-approve. After independent review, retarget onto leftover-coordinates (feat/leftover-map-coordinates-v2240 / feat(reports): persist leftover-map coordinates (v2.24.0) #782) rather than squash-merging here. Issues Milestone 2: port verified direct-PostgreSQL analysis into the protected product architecture #79 and Milestone 2.1: add normalized runtime-analysis schema bridge after v0.77 #87 stay open. Do not merge revert: undo #782 squash until independent APPROVE #808 without independent APPROVE.

Test plan

• leftoverMapAxisBadge.test.ts leftoverMapAxisTickBadge reads 1.84/0.86 on +0.50/−0.02, names rank-0 0, omit NaN/Infinity/null/negative independently of share, σ copy leftover axis {axis} tick {value} σ {singular}, never names leftover-map axis share, do not invent σ from leftover-map axis share or share from σ, stay distinct from leftoverMapCompareAxisTickBadge / leftoverMapPlotTickAxisBadge / leftoverMapComparePlotTickAxisBadge / leftoverMapAxisBadge
• App.test.tsx pair-list leftover-axis ticks leftover axis 1 tick +0.50 σ 1.84 / leftover axis 2 tick −0.02 σ 0.86 / leftover axis 1 tick 0.00 σ 1.84; grouping comparison leftover-axis ticks stay leftover map comparison leftover axis 1 tick +0.50 σ 1.84
• LeftoverMapPlot.test.tsx leftover-axis tick copy is absent from the leftover-map graphic
• i18n.test.ts required keys for leftover-axis tick σ in ko/zh/ja/vi (잔차 축 1 눈금 +0.50 σ 1.84 / 残差轴 1 刻度 +0.50 σ 1.84 / 残差軸 1 目盛 +0.50 σ 1.84 / vạch trục phần dư 1 +0.50 σ 1.84)
• frontend oxlint on changed files: 0 warnings, 0 errors
• frontend tsc -b passed
• frontend vitest: leftover-map suites + App 642 passed
• CI Full test suite and Frontend lint, test, build on this exact head
• After make seed, leftover-axis ticks name leftover-map singular values even when leftover-map axis share is omitted; click opens that post.

Evidence boundary

Authenticated PostgreSQL API and k6 runtime acceptance are not claimed. No real records or credentials. Synthetic fixtures only.

Independent approval is required. No self-approval, admin bypass, or force push.

Jeon, M., Jin, I. H., Schweinberger, M., & Baugh, S. (2021). Mapping unobserved item–respondent interactions: A latent space item response model with interaction map. Psychometrika, 86(2), 378–403.

Gabriel, K. R. (1971). The biplot graphic display of matrices with application to principal component analysis. Biometrika, 58(3), 453–467.

---

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7ca384a6-3b84-4988-9dde-af065b7ab926

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[seonghobae]

Independent review required on exact head e9e4c2a. Do not self-approve. Do not squash-merge onto the unprotected leftover base. Stacked onto #870 @ b086d97. Leave #869 and #870 open. Independent APPROVE is required on each exact SHA. Issues #79 and #87 stay open.

Buyer-facing copy: leftover-axis ticks stay leftover axis {k} tick {value} σ {singular} when σ is finite, independently of leftover-map axis share. Origin 0.00 plus unique finite ξ/ζ projections match the leftover-map graphic. Comparison leftover-axis ticks stay ADR 0329.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[seonghobae]

Cycle 2026-08-31T13:54 KST: exact head e9e4c2a Frontend lint/test/build success; Full test suite was in progress at last poll. Devin Review COMMENTED (no issues) is not independent APPROVE. Leave #871 open. Do not self-approve. Do not squash-merge. Next buyer gap stacks leftover-map axis share on leftover-map comparison graphic leftover-map axis ticks independently of leftover-map singular values after this head.

[seonghobae]

Cycle 2026-08-31T14:04 KST: leftover-map comparison graphic leftover-map axis tick leftover-map axis share independently of leftover-map singular values (ADR 0331 / v2.88.0) opened as #872 stacked onto this PR @ e9e4c2a. Leave #871 open. Independent APPROVE still required on this exact head. Do not self-approve. Do not squash-merge.