fix(schedule): keep empty day headers in list view

[chiptus]

Set-level filters (type, vote, time-of-day) in the schedule list view used to make a whole day group disappear once its sets were filtered out, which also unmounted the filter sheet mid-interaction if it was opened from that day's header. Each day group now comes from filterScheduleDays's output directly (its contract already keeps non-matching days with empty stages), and empty groups show a "No sets match your filters." line instead of vanishing. The day picker still narrows to just the selected day.

UPL-64

Verification

• Open the schedule list view, filter by set type to something only some days have; every day's header stays, emptied days show "No sets match your filters."
• Open the filter sheet from a day group, then pick a filter that empties that same day; the sheet stays open and the day shows the empty state instead of unmounting.
• Pick a single day in the day filter; only that day's header renders (set-level filters on top of it still show the empty state, not disappear).
• Filter to something that empties every day; per-day headers with empty states render, not the global "No scheduled sets found" screen. Clear filters; sets return.
• tests/e2e/schedule-type-filter.spec.ts, schedule-list-day-header.spec.ts, schedule-filter-sheet.spec.ts, schedule-vote-chips.spec.ts, schedule-vote-scope.spec.ts (13 tests) all pass locally; full unit suite (655 tests) passes; lint and typecheck clean.

Note: self code-review flagged the day-selection filter (selectedDay === "all" ? days : days.filter(d => d.date === selectedDay)) as now duplicated a third time (existing copies in TimelineToolbar.tsx and ScheduleLineupView.tsx). Left as-is here to keep this fix scoped to the two files the issue named — consolidating into a shared helper in scheduleFilter.ts would be a reasonable follow-up touching unrelated call sites.

🤖 Generated with Claude Code

https://claude.ai/code/session_011bftBYh39JGWmEMUSJ2xdY

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Project	Deployment	Actions	Updated
upline	Ready	Preview	Sep 14, 2026 5:45am UTC

[Copilot]

🟢 Approval recommended

No unresolved issues were identified.

Pull request overview

Fixes schedule list filtering so empty day groups remain visible with an appropriate empty state.

Changes:

• Preserves filtered day headers and selected-day behavior.
• Adds per-day empty-state messaging.
• Updates E2E coverage.

File summaries

File	Change
tests/e2e/schedule-type-filter.spec.ts	Tests empty days and filter-sheet persistence.
src/routes/festivals/$festivalSlug/editions/$editionSlug/schedule/list.tsx	Builds groups from filtered schedule days.
src/pages/EditionView/tabs/ScheduleTab/list/ListDayGroup.tsx	Renders the per-day empty state.

Review details

• Files reviewed: 3/3 changed files
• Comments generated: 0
• Review effort level: Lite

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[github-actions]

Playwright test results

 65 passed

Details

 65 tests across 21 suites
 1 minute, 26 seconds
 12c019f