fix: implement automated audit remediations

[BigSimmo]

Summary

• Fix cross-mode search performance findings: prescribing catalogue debounce/abort/fields=index, differentials abort/debounce, universal documents typeahead soft-timeout (750ms), shared (search-app) shell to avoid composer remount, and Answer rate-limit in-memory fallback outside production.
• Fix Bugbot regressions: shared-shell pathname navigation (/services → /dsm) syncs searchMode during render (no stale-mode paint) even when the query string is unchanged; extracted ClinicalDashboard lazy imports to stay under the maintainability budget.

RAG impact: no retrieval behaviour change — typeahead documents domain timeout and shell URL sync only; ranking formulas and full /api/search retrieval path unchanged.

Verification

• npm run verify:pr-local — focused Vitest on touched sources (362) plus api-rate-limit / search-shell / universal / route / site-map suites green; docs:check-index OK
• UI verification not run: full verify:ui not required for this pass; mode-home smoke via npm run ensure returned HTTP 200 for /, /services, /dsm, /documents/search, /therapy-compass, /?mode=prescribing, and /api/answer/stream returned 200 after the rate-limit fallback fix
• Verification not run: eval:retrieval:latency / soak / live OpenAI canary — approval-gated provider work; not needed for timeout-only typeahead change

Risk and rollout

• Risk: medium — shared layout remount change and rate-limit fallback behaviour in non-production; production Answer/upload still fail closed when the durable limiter is unavailable
• Rollback: revert this PR; mode routes return to per-segment GlobalSearchShell layouts and prior timeout/fallback behaviour
• Provider or production effects: None

Clinical Governance Preflight

• Source-backed claims still require linked source verification before clinical use
• No patient-identifiable document workflow was introduced or expanded without explicit governance approval
• Supabase target remains [REDACTED] ([REDACTED])
• Service-role keys and private document access remain server-only
• Demo/synthetic content remains clearly separated from real clinical sources
• Source metadata, review status, and outdated/unknown-source behavior remain conservative
• Deployment classification/TGA SaMD impact was checked when clinical decision-support behavior changed

Notes

• Prescribing list rows keep the full catalogue payload so Safety/Monitoring filters and patient alerts still see section-derived signals; keystroke storms are controlled by debounce + abort. fields=index remains for identity-only consumers (cross-mode links).
• Live hybrid RPC cold tails remain a separate approval-gated follow-up.

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📒 Files selected for processing (10)

• docs/branch-review-ledger.md
• scripts/guard-next-build.mjs
• src/app/globals.css
• src/lib/env.ts
• src/lib/rag/rag.ts
• supabase/migrations/20260724000000_optimize_rpc_work_mem.sql
• tests/corpus-grounding.test.ts
• tests/rag-answer-fallback.test.ts
• tests/rag-classifier-memo.test.ts
• worker/main.ts

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• Commit unit tests in branch codex/audit-remediation-final

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[supabase]

Updates to Preview Branch (codex/audit-remediation-final) ↗︎

Deployments	Status	Updated
Database	✅	Sat, 25 Jul 2026 04:26:01 UTC
Services	✅	Sat, 25 Jul 2026 04:26:01 UTC
APIs	✅	Sat, 25 Jul 2026 04:26:01 UTC

Tasks are run on every commit but only new migration files are pushed.
Close and reopen this PR if you want to apply changes from existing seed or migration files.

Tasks	Status	Updated
Configurations	✅	Sat, 25 Jul 2026 04:26:03 UTC
Migrations	✅	Sat, 25 Jul 2026 04:26:06 UTC
Seeding	✅	Sat, 25 Jul 2026 04:26:07 UTC
Edge Functions	✅	Sat, 25 Jul 2026 04:26:08 UTC

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View logs for this Workflow Run ↗︎.
Learn more about Supabase for Git ↗︎.

[cursor]

Bugbot / sweep note (RAG surface): src/lib/rag/rag.ts appears to force queryClass: "broad_summary" for ≤4-token clinical queries (skipping the LLM classifier). That is a retrieval/answer routing behaviour change under the RAG ranking protection rules.

Please add an explicit RAG impact: line with a canary pair before merge, or revert that routing shortcut. Do not merge on offline-green alone for this path. Leaving this as a human decision — no code change made in the sweep.