Trips just got a top-to-bottom rebuild.

Added:
- Trips: redesigned list with timeline fingerprints, an interactive timeline on detail, edit & merge legs, cost donut, weather sparkline, horizontal energy-flow card
- Charges list: new Cost filter (find sessions still missing a price) — Type/Cost/Location now share one tidy dropdown row

Changed:
- 90-day and yearly charts include empty weeks/months so gaps are visible

Fixed:
- DatePicker off-by-one in some time zones
