[igoricbot]

Summary

Refreshes the getting-started onboarding cluster against current agoric-sdk:

• Bump the required Node.js version from the EOL v18.18.0 to v22.11.0, matching agoric-sdk's engines.node (^22.11 || ^24.14).
• Update the Yarn install step: the guide described Yarn 1 with yarn set version 1.22.5, but the default dapp-offer-up template pins Yarn Berry ("packageManager": "yarn@4.7.0"). Corrected accordingly.
• Fix a bigint literal bug in the sell-concert-tickets code sample (backRow used a bare n where AmountMath.make/maxTickets need bigint literals).
• Retire deploying.md, which described the retired ag-solo agoric deploy model (home object, contract/deploy.js + api/deploy.js, the REPL, agoric init defaulting to dapp-fungible-faucet) that matches no current template. The current core-eval flow is already documented accurately in explainer-deploying-a-smart-contact.md; added a redirect from the old path and fixed the one inbound link (plus a stale zoe.install(bundle) sample, now zoe.installBundleID(bundleId)) in guides/js-programming/eventual-send.md.
• Fix a "Deploying a Smart Contact" title typo (-> "Contract").
• Soften a swaparoo doc's dated "due to a bug, which will be addressed in an upcoming release" note — the bug is still present upstream, so the promise is misleading.
• Bump one ui-tutorial dependency pin (@interchain-ui/react 1.22.11 -> 1.23.11) to match what agoric-labs/ui-tutorial's checkpoint branches actually pin.

Verification notes

Checked against live agoric-sdk (engines, CLI defaults in packages/agoric-cli/src/main.js), the Agoric/dapp-offer-up and Agoric/dapp-agoric-basics template repos, and agoric-labs/ui-tutorial's checkpoint-1 through checkpoint-5 branches.

Notably, the seven ui-tutorial/ pages' code samples and dependency pins (@agoric/react-components, @agoric/web-components, @agoric/rpc, @agoric/store, cosmos-kit) turn out to match the actual checkpoint branches exactly, word for word in the React source. They lag the unreleased tip of Agoric/ui-kit, whose API has since diverged in breaking ways (AgoricProvider props, which package exports useAgoric), but agoric-labs/ui-tutorial itself has not been updated to that tip. Bumping the docs' pins to ui-kit's latest would break the tutorial rather than fix it, so those pins were left as-is (aside from the one confirmed drift above).

contract-rpc.md's source permalinks pinned to the mainnet1B tag were also re-checked line-by-line against that tag and found accurate.

Test plan

• yarn docs:build (includes the internal link checker) passes locally
• Spot-checked external links referenced from the touched pages (community forum, Discord, GitHub, Keplr) resolve
• Not independently re-verified: non-code-sample prose in pages marked "up-to-date"/unchanged by the survey and left untouched here

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