Moves the moderation warning badge ("Content blocked...") to overlay the blurred thumbnail image instead of sitting below it or increasing card height. This logic is applied to both the main `VideoCard` and the `SimilarContentCard` to ensure layout consistency.
Changes:
- VideoCard.js: Refactor `updateModerationBadge` to append the badge container as a child of the `anchorEl` (thumbnail wrapper) with absolute positioning.
- SimilarContentCard.js: Implement `refreshModerationUi` logic to generate and overlay a simplified moderation badge on the thumbnail when `trustedMuted` context is present.
- Fix tests/moderation/video-card.test.mjs: Patch test environment to mock `globalThis.navigator`.
- Updated `DEFAULT_TRUSTED_MUTE_HIDE_THRESHOLD` in `config/instance-config.js` from 1 to 20.
- Updated `tests/moderation/trusted-mute-lists.test.mjs` to explicitly override the threshold to 1 for tests verifying the hide mechanism.
- Updated documentation (`docs/moderation/*.md`, `docs/instance-config.md`, `content/community-guidelines.md`) to reflect the new default and upstream examples.
- Verified that existing blurring logic in `js/feedEngine/stages.js` and `js/ui/components/VideoCard.js` handles the intermediate state (1-19 mutes) correctly.
google-labs-jules[bot]