update-deps

Update dependencies across the assistant-ui monorepo (npm via pnpm + taze, Expo SDK-pinned packages, Python packages via uv, and GitHub Actions). Use when the user asks to bump, upgrade, or update dependencies (root, packages, examples, templates, python/*, .github/workflows/*), refresh the pnpm lockfile or uv.lock files, repin GitHub Actions, or run the dependency-update workflow before a release.