- Add ellipsis truncation for titles and usernames
- Implement scroll-on-hover (desktop) and scroll-on-center (mobile)
- Fix mobile layout blowout using min-width: 0 on flex containers
- Add IntersectionObserver and ResizeObserver mocks for tests
- Added `db.close()` to exported functions in `js/storage/dmDb.js` to ensure IndexedDB connections are released.
- Patched `tests/test-helpers/setup-localstorage.mjs` to include a `structuredClone` polyfill required by `fake-indexeddb` in Node.js environments.
- Updated `tests/dm-normalization.test.mjs`, `tests/dm-db.test.mjs`, and `tests/nostr/dm-direct-message-flow.test.mjs` to conditionally initialize `fake-indexeddb` to prevent global conflicts.
- Verified fixes by running unit tests and the `scripts/agent/interop-test.mjs` E2E suite.
