[BUGFIX] Shadow DOM support — `{{#in-element}}` with ShadowRoot/DocumentFragment and declarative shadow DOM via compiler#21217

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copilot/quest-proper-shadowdom-support

Commits on Mar 12, 2026

Commits on Mar 14, 2026

refactor: extract shadow root tests to in-element-shadow-root.ts and add new tests

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refactor: address review feedback on in-element-shadow-root.ts and add document fragment suite

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Commits on Mar 19, 2026

fix: reuse existing open shadow root on re-render when component root is declarative shadow DOM template

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Commits on Mar 24, 2026