- Add Mastodon to Platform enum with color #6364FF, 500 char limit, 4 max images
- Add MastodonPost to ContentType enum
- Create MastodonController with dynamic OAuth app registration per instance
- Create MastodonPublisher service for posting statuses with media
- Create MastodonConnect.vue for instance URL input
- Create MastodonPreview.vue with Mastodon-styled post preview
- Update PlatformPreview.vue and Edit.vue to support Mastodon
- Add Mastodon config toggle in trypost.php
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
