Replaced the local `extractDTagValue` function in `js/ui/components/DeleteModal.js` with the shared `getDTagValueFromTags` utility from `js/nostr/nip71.js` to reduce code duplication and improve maintainability.
Added `tests/ui/components/DeleteModal.test.mjs` with manual DOM mocks to verify the refactor and ensure no regressions.
Co-authored-by: PR0M3TH3AN <[email protected]>