The Stage Timer and PiP Timer views relied on `align-content: center` to
vertically center the timer digits inside `.timer-container`, which is a
plain block element. Aligning children of a block container via
`align-content` only works in Chromium 123+ (Firefox 125+, Safari 17.4+).
Embedded browsers such as vMix Browser Input (CEF V115) and other older
CEF/Chromium-based production tools ignore the property, so the digits
fall back to the top of the container while every other element renders
correctly.
Make `.timer-container` a real flex column and center with
`justify-content: center`, which is universally supported and matches the
centering approach used elsewhere in the codebase. The removed
`justify-self`/`align-self` were no-ops on a full-width flex item.
Fixes#2126
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014T6ENZ3r6JXZb1fpYw2oNY
refactor: improve empty state
refactor: review schedule design
- fit as many elements as possible
- expose cycle interval as an option
- stabilise rundown reference
- style tweaks