chore(deps): react and @types/react 19.2.8 / 19.2.18

[mazze93]

Supersedes #55, which went CONFLICTING against main and didn't respond to two @dependabot rebase requests.

Same content, plus react-dom carried along so the runtime pair doesn't skew — #55 bumped react alone, which would have left react-dom at 19.2.5.

Deliberately not React 19.3.0

pnpm add react@^19.2.8 resolves to 19.3.0 today, and that minor is not free:

	bundle.html	gzip
react 19.2.8	428.46 kB	125.86 kB
react 19.3.0	457.75 kB	134.51 kB

bundle.html is the primary deliverable and ships as a single self-contained offline file, so +29 kB (~7%) is a decision, not a side effect of a patch bump.

The caret ranges here match what Dependabot proposed and the lockfile pins 19.2.8 — structurally identical to what #55 would have been. When Dependabot opens 19.3.0 on its own, it can be judged on its merits with that size cost visible.

Verification

• tsc -b --noEmit clean
• 79/79 tests
• pnpm build clean at 428.46 kB (unchanged from main)
• pnpm lint unchanged — same 1 local-only error + 3 known react-hooks/refs warnings as main

Close #55 in favour of this.

🤖 Generated with Claude Code

Confidence Score: 5/5

Safe to merge: the updated runtime and type packages install reproducibly and the application checks, tests, and builds successfully.

What we checked:

• The executable validation script for the React upgrade validation was authored.
• The validation script was executed and its output was captured to a log file.
• The resulting log records every command run, working directory, exit code, the exact tested tip, the dependency diff, and the observed validation result.

Summary

• Updates React and React DOM together to version 19.2.8 and updates @types/react to 19.2.18.
• Refreshes the pnpm lockfile resolutions and integrity metadata for the new dependency graph.
• Frozen installation, type checking, the full test suite, and the production build complete successfully.

This change is safe to merge.

_{Reviews (1) · Last reviewed commit: "chore(deps): react and @types/react 19.2..."}