chore(deps): autoupdate (needs claude fix)

[github-actions]

The dependency autoupdater failed during builds-and-checks.

Run log: https://github.com/dudko-dev/agent-web/actions/runs/33232906655

A Claude session has been dispatched to push fixes onto this branch
so the following commands all exit 0:

  npm run typecheck
  npm run format:check
  npm run build
  npm test

Claude will leave a status comment on this PR when it finishes.
The Claude workflow re-dispatches PR-checks once it is done, so the
checks below reflect its pushed fixes.

[claude]

Autoupdate fix status: build fixed, pushed.

Failing command: npm run build (the DTS generation step). typecheck, format:check, and test were already green.

Root cause: the autoupdater bumped typescript from ^5.x to ^7.0.2. tsup@8.5.1 (already at latest, no newer release available) bundles rollup-plugin-dts@6.1.1 internally for its .d.ts build step, and that bundled version isn't compatible with TypeScript 7:

TypeError: Cannot read properties of undefined (reading 'useCaseSensitiveFileNames')

I also tried TypeScript 6.0.3 as a middle ground — that hits a different failure in the same dts step (TS5101: Option 'baseUrl' is deprecated), since rollup-plugin-dts internally sets baseUrl and TS 6 promotes that deprecation to a hard error.

Fix: pinned typescript to 5.9.3 (the last 5.x release) in package.json/package-lock.json — a compatibility shim only, no product code touched. This unblocks the build until tsup ships an update with a TS 6/7-compatible rollup-plugin-dts.

Verification: ran a clean rm -rf node_modules dist && npm ci --no-audit --no-fund followed by npm run typecheck, npm run format:check, npm run build, and npm test — all exit 0 (96/96 tests passing).

Pushed: commit 0b7fbb6 on chore/autoupdate-33232906655.