chore(dev): update @types/node 24 → 26 (major)

[fro-bot]

Summary

Bumps @types/node from 24.13.2 to 26.0.0 — an even/LTS major, permitted by the allowedVersions: /^v?([0-9]*[02468])\\./ rule in .github/renovate.json5. Pinned to an exact version to match the rest of the devDependencies block.

Supersedes stale PR #127, which targeted the odd/non-LTS 25 major (disallowed by .github/renovate.json5) and uses a bare major pin "25"; #127 is now in a CONFLICTING state against main and should be closed.

Verification

Check	Result
bun install	✅ clean
bun run typecheck	✅ clean
bun run lint	✅ clean (63 files)
bun run build	✅ clean
bun run test:unit	✅ 321 pass / 0 fail

Changeset

@types/node is a devDependency — no user-visible changes; no changeset needed.

[fro-bot]

Autoheal refresh — @types/node → 26.1.1 (latest LTS even)

This branch had fallen into a CONFLICTING/DIRTY state against main (last merged main on 2026-07-06; main has since advanced with several dep bumps and the 0.12.0 → 0.12.1 version bump). Meanwhile the Renovate counterpart #278 (26.1.1) was MERGEABLE but UNSTABLE — Renovate posted an "Artifact update problem" because install-tool bun 1.3.14 failed in its environment, leaving bun.lock un-regenerated ("You probably do not want to merge this PR as-is").

Fix: merged origin/main into this branch and resolved the package.json/bun.lock conflicts so the net result is current main + the @types/node bump advanced to the latest even/LTS 26.1.1 (was 26.0.0):

 package.json  | 2 +-
 bun.lock      | 6 +++---

@types/node is pinned to an exact version ("26.1.1") to match the existing devDependencies convention (no bare-major pin). Even major 26 is permitted by the .github/renovate.json5 allowedVersions rule for @types/node.

Verification on this branch:

Check	Result
bun install	✅ clean (+ @types/node@26.1.1)
bun run typecheck	✅ clean
bun run lint	✅ clean (63 files, no fixes)
bun run build	✅ exits 0
bun run test:unit	✅ 322 pass / 0 fail / 1279 expect() calls

@types/node is a devDependency — no user-visible changes; no changeset needed.

This is a forward merge commit (beb0685), pushed non-force (de75c64..beb0685). Merging this PR will satisfy the @types/node 24 → 26 update and let Renovate auto-close the redundant #278 (which carries the stale-lockfile renovate/artifacts FAILURE).