[SandObserver]

Summary

• Add the upnext widget (small, medium, large): the next episodes, films and albums from up to six Sonarr, Radarr and Lidarr apps, soonest first. Each row has a day and time column, a kind bar and the title over its detail line. Small and medium show 3 rows, large 7; medium and large add the episode name.
• Read /api/v3/calendar (Sonarr, Radarr) and /api/v1/calendar?includeArtist=true (Lidarr) with X-Api-Key, 14 days ahead, then 90 days when fewer than 8 items come back. A failed longer read keeps the shorter one and its 14 days.
• Sonarr: read the calendar without includeSeries and fetch /api/v3/series/{id} only for the series that can reach the list, cached per server for 6 hours, bounded to 500 entries of strings capped at 300 characters and validated runtime and series type.
• Parse replies in upnext-items.js with no I/O: daily shows drop the season and date-like names, runtimes past 24 hours fall back, rows past the Date range are skipped, consecutive episodes at one time merge into a range, premieres and finales are marked, Radarr gives one row per chosen release type, items listed by two apps show once.
• Date-only films and albums stay on the server until their day ends at UTC-12; the browser drops them at local midnight and sorts every row in local time.
• One failing app leaves the others on screen with a caption naming the app, also over the empty state; apps failing differently get a neutral line and each app's problem in spoken text. A Timed out error is a timeout. The widget fails only when every app fails. Empty state names the window and opens the app's calendar.
• The minute refresh redraws rows only when their content changes and returns focus to the same row.
• Rows link to /series/{slug}, /movie/{slug} and /album/{id} through serviceLink; each row carries its spoken text in a visually hidden span.
• Mark unmonitored, releases and href as cosmetic, so changing them keeps every app's API key.
• Increased contrast raises the secondary text; forced colors draw the kind bars in CanvasText and Today in Highlight. The shared loading placeholders now paint in forced colors.
• Rows get the shared sliding hover highlight on a fine pointer and a pressed fill everywhere. initFluidHover takes an optional list with an optional zoom function, and placePill takes the page zoom so the pill stays on its row in a zoomed widget page.
• Add the calendar glyph with a new upnext icon, and redraw the downloads icon as an arrow into a box.

Testing
All green, including the Docker build, image scan and e2e. Added 34 tests for the readers, series cache bounds, time zones, out-of-range rows, timeouts, partial failure, local sort, API key retention and the pill.

Changelog

Added

• Up Next widget for Sonarr, Radarr and Lidarr.

Fixed

• Widget loading placeholders show in high contrast mode.

Checklist

• Stays within the project constraints: one container, no runtime dependencies, no build step (see CONTRIBUTING.md).
• Tests added or updated for new logic, and the full suite, lint, and typechecks pass.
• Docs updated if behavior or configuration changed.