v0.4.0

## What's Changed
* chore: bump bun to 1.3.14 by @simonklee in https://github.com/anomalyco/opentui/pull/1152
* ci: harden workflow execution by @simonklee in https://github.com/anomalyco/opentui/pull/1153
* opentui: support Node.js 26 alongside Bun by @simonklee in https://github.com/anomalyco/opentui/pull/1149
* link: retire slots after generation exhaustion by @simonklee in https://github.com/anomalyco/opentui/pull/1154
* ci: avoid duplicate auth headers in opencode workflow by @simonklee in https://github.com/anomalyco/opentui/pull/1156
* ci: use max reasoning for opencode by @simonklee in https://github.com/anomalyco/opentui/pull/1157
* text-buffer: preserve style on listener failure by @simonklee in https://github.com/anomalyco/opentui/pull/1155
* .github/workflows: Migrate workflows to Blacksmith runners by @blacksmith-sh[bot] in https://github.com/anomalyco/opentui/pull/1159
* ci: split native tests from package matrix by @simonklee in https://github.com/anomalyco/opentui/pull/1161
* core: fix Node runtime integration by @simonklee in https://github.com/anomalyco/opentui/pull/1160

## New Contributors
* @blacksmith-sh[bot] made their first contribution in https://github.com/anomalyco/opentui/pull/1159

**Full Changelog**: https://github.com/anomalyco/opentui/compare/v0.3.4...v0.4.0