Devex: improve tenderly and dev tools

[rossgalloway]

Summary

• add a local Tenderly mode toggle in the header with the updated single-badge interaction and safer disable behavior. This means you can keep the VITE_TENDERLY_MODE env var true and toggle between tenderly mode and normal mode in dev builds more easily.
• add shared dev/preview API launchers with port selection, portable port detection, and mode-aware env handling. When you run bun run dev or bun run preview, a small CLI picker pops up and lets you change the port of the API. This is useful if you are running more than one dev server at a time and one of them makes changes to the API server.
• harden API reuse so it only reuses matching local runtime state and only invalidates on API-relevant committed/env changes

Testing

• bun run lint:fix
• bun run tslint
• bunx vitest run scripts/api-runtime.test.ts scripts/dev.test.ts scripts/preview.test.ts src/config/tenderly.test.ts
• bun run build

to test

• set VITE_TENDERLY_MODE to true and make sure your tenderly testnets are set up. you should be able to toggle between the testnets and live chain RPCs with the toggle. clicking on the toggle badge still opens the toolbar.
• try running bun run dev and bun run preview and you should be able to choose your api server port.

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Project	Deployment	Actions	Updated (UTC)
yearnfi	Ready	Preview, Comment	Apr 10, 2026 10:52pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
yearnfi-nextjs	Ignored		Apr 10, 2026 10:52pm

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

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