chore: upgrade TypeScript to 6.0.3

[dmnktoe]

Summary

• Bumps the typescript dev dependency to 6.0.3 (current 6.x line on npm).
• Bumps @typescript-eslint/eslint-plugin and @typescript-eslint/parser to 8.59.0 so peer dependencies allow TypeScript 6 (8.54.x only allowed <6.0.0).
• Adds a pnpm override for typescript-eslint to 8.59.0 so eslint-config-next’s nested typescript-eslint is aligned and does not pull an older set that conflicts with TS 6.
• Sets ignoreDeprecations: "6.0" in tsconfig.json for existing target: "es5" and baseUrl usage; TypeScript 6 now errors on these as deprecated (removal in TS 7) until a follow-up migration.

Verification

• pnpm run typecheck — pass
• pnpm run lint:strict — pass
• pnpm test — pass (369 tests)

pnpm run build failed in this environment with a missing API base URL (undefined/api/articles when collecting /articles/[slug]). That appears unrelated to the TypeScript version bump; set the required env vars for a full build if needed.

  

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Project	Deployment	Actions	Updated (UTC)
sentiment	Ready	Preview, Comment	Apr 23, 2026 9:52pm

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: afeb7e87-a114-467e-b5ac-7c313a8570ad

📥 Commits

Reviewing files that changed from the base of the PR and between d9ff6d9 and 74c3c59.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (2)

• package.json
• tsconfig.json

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cursor/update-typescript-6-0eef

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[sentry]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.70%. Comparing base (d9ff6d9) to head (74c3c59).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #285   +/-   ##
=======================================
  Coverage   65.70%   65.70%           
=======================================
  Files          62       62           
  Lines         729      729           
  Branches      153      153           
=======================================
  Hits          479      479           
  Misses        250      250           

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