Add Meeting Calendar: ICS events and live meetings

[tlambrou]

Adds Meeting Calendar: today’s timed events and live-meeting status from one iCloud, Google Calendar, or Outlook ICS subscription per installation. Users configure the link and appearance in Tidbyt’s mobile app; no separate hosting, device API token, or paid subscription is required.

The app rotates remaining events, recognizes common meeting providers, pages simultaneous calls, and merges overlapping/back-to-back busy intervals. It uses normal rotation, requests full animation playback, returns no image for empty/disabled states, and bounds graphic lifetime with max_age. The standalone Starlark parser supports the documented recurrence/timezone subset and reports unsupported input instead of silently presenting a partial schedule. Setup, privacy, revocation, and compatibility limits are documented in the app README.

The submitted package contains a single Starlark file and only standard Pixlet runtime imports. Maintained calendar/display modules are bundled in the source project; validation checks the generated artifact and runs all four suites against that exact bundle. Normal, active, and simultaneous-call preview GIFs remain byte-for-byte identical after bundling.

Tracking issue: https://github.com/tlambrou/tidbyt-calendar/issues/1

Review requirement

The single-file package resolves the bot’s multiple-file objection. The refreshed Modules result requests review of http.star, which the app needs to fetch ICS subscriptions directly. URL validation restricts requests to HTTPS subscription endpoints for iCloud, Google Calendar, and Outlook. The app does not log subscription URLs or calendar contents.

Validation

• Source-project Linux CI passes for this bundle: https://github.com/tlambrou/tidbyt-calendar/actions/runs/34299733365
• pixlet check apps/meetingcalendar passes with upstream-pinned v0.34.0, without raising the one-second render threshold.
• Four native Starlark suites pass: calendar, display, integration, and independent oracle cases. This includes 55 calendar checks, 37 independent recurrence cases, 16 independent timezone cases, and expectations for the existing calendar fixtures.
• Normal, single-call, and simultaneous-call fixture renders pass the default one-second profile check and have been visually inspected. Existing source-project TypeScript checks and 69 tests also pass.
• Test harness and synthetic fixtures: https://github.com/tlambrou/tidbyt-calendar/tree/fdb9255/test/community
• Reproduction instructions: https://github.com/tlambrou/tidbyt-calendar/blob/fdb9255/docs/community-app.md

Physical original-device testing is pending access to a device credential configuration. Hosted full-animation playback, no-image behavior, and expiration also remain pending hosted access; local rendering/pushing cannot establish those contracts. Low-level network exceptions cannot be caught in Pixlet 0.34.0, so prior-image expiration is the fallback; HTTP response and parser failures have safe error screens.

Synthetic previews

[tidbyt]

⚠️ The automated review process is experimental and likely has bugs. Please bear with us as we iron out the kinks and enable you to ship changes at high velocity 🚀

Next Steps

Hello! Thank you so much for your change 🤜 🤛 . There are a few things you need to do:

• Sign the CLA if you haven't already
• Ensure your build is green! Any problem will display a proposed solution to try out
• Get a review, either by Tidbyt Bot or by a Tidbyt engineer

Manual Review Required

Hang tight! A Tidbyt engineer will be by shortly to review your change. Here is what they will be looking for:

	Test	Details
✅	App Dir	All files are in a single app directory
🟡	Modules	Usage of http.star requires review
✅	Original Author	The original author matches the PR author