formatUsageDuration should show days for durations >= 24h

[jetm]

Problem

The weekly-reset-timer and other usage duration widgets display total hours and minutes (e.g., 36hr 30m), even when the duration exceeds 24 hours. For weekly reset timers that can show up to ~168 hours, this is hard to parse at a glance.

Expected behavior

Durations >= 24h should include days, e.g.:

• 36hr 30m -> 1d 12hr 30m
• 168hr -> 7d
• 5hr 20m -> unchanged (below 24h)

Compact mode similarly: 36h30m -> 1d12h30m

Location

src/utils/usage-windows.ts, formatUsageDuration() (line 92-106)

Suggested fix

Add a days calculation before the hours/minutes logic:

const days = Math.floor(clampedMs / (1000 * 60 * 60 * 24));
const elapsedHours = Math.floor((clampedMs % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));

Then prepend ${days}d when days > 0.