Calendar: several NE Hub calendars with colors, per-person view/edit sharing and per-calendar subscribe links; Movies & TV: converted video keeps the right time and seeks inside what the stream has

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitea/workflows/build.yml

@@ -22,6 +22,7 @@ jobs:
       - run: node tools/tasks-test.js    # repeating tasks and subtasks
       - run: node tools/push-test.js     # reminders: when they are sent, never twice
       - run: node tools/users-test.js   # accounts: private data, tab limits, invites, migration
+      - run: node tools/cal-test.js     # calendars: several per person, colors, sharing view/edit, subscribe links
       - run: node tools/plex-test.js    # Plex sign-in stays signed in and repairs itself
       - run: node tools/player-test.js  # music player: queue, shuffle/repeat, stall recovery
       - run: node tools/lyrics-test.js  # lyrics: formats, wrong matches refused, remembered