duration() shows wrong days and hours past 24h #32956

Description

duration() in packages/tui/src/util/locale.ts gets the days/hours branch wrong once a duration reaches 24h.

It computes days from the sub-hour remainder (input % 3600000) divided by a full day, which is always 0, and leaves hours as the uncapped total:

const hours = Math.floor(input / 3600000)               // total hours, never capped
const days  = Math.floor((input % 3600000) / 86400000)  // always 0

So:

• 1 day → 0d 24h (expected 1d 0h)
• 2d 3h → 0d 51h (expected 2d 3h)

It's used to show elapsed time in the TUI session view, where a span is completed - created over a whole session or subagent, so anything that ran 24h or longer shows a nonsensical value.

OpenCode version

dev (1.17.8)

Steps to reproduce

duration(86400000)   // "0d 24h", expected "1d 0h"
duration(183600000)  // "0d 51h", expected "2d 3h"