fix(sonar): remediate pre-existing SonarCloud debt (89 issues)

[cryptoxdog]

Summary

Full-repo SonarCloud remediation of pre-existing debt on the Quantum-L9_SEO-Bot project.

Baseline (SonarCloud, retrieved live via the API): quality gate ERROR (new_security_rating = 3), 11 vulnerabilities, 91 code smells, 0 bugs, 0 hotspots — 102 open issues.

This PR fixes 89 of 102 at root-cause level, all validated locally (tsc CI-typecheck, eslint, 134/134 tests, production build all green). The remaining 13 are truthfully dispositioned, not suppressed.

Disposition	Count	Notes
✅ Fixed (pending remote re-analysis)	89	all 11 vulnerabilities + 78 code smells
⏸️ Deferred (documented)	4	3× S8786, 1× S1135
📦 Vendor-scope (not our code)	9	minified PostHog snippet

Vulnerabilities — all 11 fixed (the quality-gate driver)

• Install hardening (S6505, S8543): CI and the session hook now use npm ci --ignore-scripts (the committed package-lock.json makes npm ci valid and version-locked), and CI invokes the installed tsc/vitest binaries directly instead of npx.
• Docker (S6470 CRITICAL, S6505, S7031): docker/Dockerfile aligned to the repo's canonical npm toolchain — explicit COPY (no wildcard), a single install RUN per stage, npm ci --ignore-scripts. The prior pnpm setup could not build (no pnpm-lock.yaml exists) and violated the repo's own npm-only governance gate.
• HTTPS enforcement (S6506): scripts/deploy.sh docker bootstrap now uses curl --proto '=https' --tlsv1.2.

Code smells — 78 fixed

• All 10 cognitive-complexity CRITICALs (S3776) reduced below the ceiling by behaviour-preserving helper extraction (cli, gate-registry ×4, maintenance-readiness, register, llm-parse, plan-executor, recommendations). Each validated against its unit tests.
• Idiom modernization: replaceAll, RegExp#exec, String.raw (byte-verified equal for security-sensitive escaping/redaction), readonly members, ??=, startsWith, Object.hasOwn, Set#has, flatMap, node:readline, TypeError, top-level await, extracted nested ternaries.
• Regex: only provably-equivalent S8786 simplifications applied (verified against real inputs).
• Shell hardening: [[ ]], local positional params, error output to stderr.

Deferred (documented, not suppressed)

• S8786 on redact.ts:28 — rewriting the secret-redaction regex to satisfy a maintainability rule risks a redaction regression (secret leak); the suppression policy forbids that trade.
• S8786 on plan-executor.ts:103 and llm.ts:457 — both regexes are already linear; no behaviour-preserving simplification exists.
• S1135 TODO on site-deployment.ts:212 — documents a deliberate multi-tenant safety guard (the fan-out job ships disabled); resolving it is a product decision, and deleting the comment without the work would be a prohibited cosmetic change.

Vendor-scope

9 findings (S1121, S878, S7721, S2681) live inside the official minified PostHog bootstrap in client-snippets/posthog-tracking.html:20. Hand-editing vendor-minified analytics is inappropriate; the correct fix is an analysis exclusion, which this project (automatic analysis, no sonar-project.properties) does not apply here.

Validation

tsc --noEmit (CI gate) ✅ · eslint src/ ✅ · vitest run 134/134 ✅ · npm run build ✅ · bash -n on shell scripts ✅. No test skipped, weakened, or deleted; no assertion relaxed.

Local caveat: the private @quantum-l9/llm-router (GitHub Packages) is not installable in the CI-less remediation environment (no NODE_AUTH_TOKEN); public deps were installed and a git-ignored local stub of that one package was used so tsc/tests could run. CI installs the real package with the token.

Evidence & traceability

Full artifacts under reports/sonarcloud/: issue register, root-cause plan, change manifest (per-file before/after checksums), validation report, remediation report, handoff, and the raw pre-remediation issue snapshot.

Remote verification

PENDING_REMOTE_ANALYSIS — no SonarCloud issue state was mutated. SonarCloud must analyze this branch head to confirm closure and the quality-gate transition to OK.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Ltv4sBL8wVosfnU4GEwENP

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Generated by Claude Code

[Copilot]

Pull request overview

Remediates a large set of pre-existing SonarCloud findings across the repo, primarily via behavior-preserving refactors and security hardening of install/build paths (CI, Docker, scripts), plus adds detailed remediation/validation artifacts under reports/sonarcloud/.

Changes:

• Hardened dependency installation in CI/Docker/session hook (locked installs, avoid npx, add --ignore-scripts) and modernized several scripts to top-level await.
• Reduced complexity / improved readability via helper extraction (e.g., plan execution dispatch flow, maintenance readiness probes, validation gate logic, dashboard/report template mappings).
• Added SonarCloud remediation documentation and traceability reports under reports/sonarcloud/.

Reviewed changes

Copilot reviewed 37 out of 38 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/services/weekly-report.ts	Extracts risk→color mapping helper to flatten HTML template logic.
src/services/site-deployment.ts	Mechanical modernizations (replaceAll, String.raw, RegExp#exec, readonly) for maintainability.
src/services/plan-executor.ts	Extracts autonomous action dispatch into a helper for reduced nesting/complexity.
src/services/notifications.ts	Marks constructor-only fields readonly and simplifies singleton init with ??=.
src/services/maintenance-readiness.ts	Extracts GitHub probe steps into helpers to reduce cognitive complexity.
src/services/llm.ts	Marks router readonly, uses RegExp#exec, and simplifies singleton init with ??=.
src/services/llm-parse.ts	Extracts JSON string scanning into a class and tightens parsing/error typing.
src/modules/web-vitals/index.ts	Uses Set membership checks and flatMap for simpler logic.
src/modules/serp-intelligence/index.ts	Marks DataForSEO base URL as readonly.
src/modules/behavior-intelligence/recommendations.ts	Extracts per-page issue evaluation helper to reduce complexity.
src/modules/behavior-intelligence/index.ts	Marks PostHog base URL as readonly.
src/index.ts	Switches to top-level await with try/catch for startup.
src/core/scheduler.ts	Marks Redis connection readonly and uses ??= for singleton creation.
src/core/database/migrate.ts	Uses top-level await for migration execution.
src/core/database/index.ts	Uses Object.hasOwn for schema key collision detection.
src/api/dashboard.ts	Hardens/modernizes HTML escaping and extracts template mapping helpers.
src/api/clients/register.ts	Extracts inactive-registration persistence helper to reduce nesting.
scripts/validation/profile-loader.ts	Uses TypeError for type-check failures.
scripts/validation/gate-registry.ts	Extracts helper functions to reduce complexity and improve readability of validation gates.
scripts/validation/core/repository-context.ts	Uses RegExp#exec for match extraction.
scripts/validation/core/redact.ts	Uses String.raw for clearer escaping.
scripts/validation/cli.ts	Refactors gate execution/recording into helpers and switches to top-level await.
scripts/request-site-build.ts	Switches to top-level await with try/catch.
scripts/manifest/inventory.ts	Uses replaceAll + String.raw for escaping in markdown rendering.
scripts/manifest/generate.ts	Switches to top-level await with try/catch.
scripts/manifest/check.ts	Switches to top-level await with try/catch.
scripts/deploy.sh	Hardens shell usage ([[ ]], local, stderr for errors, HTTPS-only curl).
scripts/add-client.ts	Uses node:readline and switches to top-level await with try/catch.
docker/Dockerfile	Aligns container build/install to npm (npm ci --ignore-scripts, explicit COPY).
.github/workflows/ci.yml	Uses npm ci --ignore-scripts and invokes installed tsc/vitest binaries.
.claude/hooks/session-start.sh	Uses npm ci --ignore-scripts post token injection; bash hardening ([[ ]]).
reports/sonarcloud/SONARCLOUD_VALIDATION_REPORT.md	Adds validation evidence and results summary for remediation work.
reports/sonarcloud/SONARCLOUD_ROOT_CAUSE_PLAN.yaml	Documents root-cause clusters and remediation strategy.
reports/sonarcloud/SONARCLOUD_REMEDIATION_REPORT.md	Adds detailed remediation report and residual risk notes.
reports/sonarcloud/SONARCLOUD_ISSUE_REGISTER.yaml	Adds issue inventory with dispositions and traceability.
reports/sonarcloud/SONARCLOUD_CHANGE_MANIFEST.yaml	Adds per-file change manifest for traceability.
reports/sonarcloud/HANDOFF.md	Adds handoff instructions for remote analysis and follow-up steps.

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[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

Copilot reviewed 36 out of 37 changed files in this pull request and generated no new comments.

Suppressed comments (1)

src/services/llm-parse.ts:84

• parseJsonFromLlm no longer strips a closing code fence when it is preceded by whitespace (e.g. an indented closing fence like \n ````, which LLMs often emit). With the current.replace(/```$/i, ''), the trailing fence remains and JSON.parse` will fail.