[codex] Compact schedule page UI

[utopiafar]

Background

The Schedule tab felt visually heavier than the task it serves: it repeated date context, used a pinned chip row that looked like tabs even though it only jumped within the page, and gave the hero/overview/reminder blocks too much first-screen weight.

Changes

• Rename the page heading from the implementation-oriented “Schedule aggregation” label to the user-facing Schedule label.
• Move generated time into subtle header metadata instead of a prominent in-list date header.
• Remove the horizontal anchor chip strip for days/conflicts/done items.
• Compact the featured schedule card, weekly overview, high-priority reminder rows, and dirty-state banner.
• Keep same-day timeline items focused on time-only labels and update widget coverage for the simplified flow.

Validation

• flutter test --no-pub test/ui/schedule/widgets/schedule_widgets_test.dart
• flutter analyze --no-pub lib/ui/schedule/widgets/schedule_aggregator_screen.dart lib/ui/schedule/widgets/tabs/magazine_narrative_tab.dart test/ui/schedule/widgets/schedule_widgets_test.dart
• Android emulator QA on globalDev:
  • first-run profile setup into Timeline
  • Schedule empty state
  • Schedule page with local QA aggregation data
  • scroll through overview/conflict/Today/Tomorrow sections
  • toggle a real task card completion through updateCardUiConfig
  • checked logcat for RenderFlex/overflow/fatal errors

Notes

The global bottom FAB can still cover the lower edge of scroll content in some positions; that appears to be shell-level behavior outside this scoped schedule-page cleanup.