Prettify retry duration display in TUI

[opencode-agent]

The change is complete. Here's a summary of the formatting logic I added:

Duration formatting rules:

• < 60 seconds: Shows as Xs (e.g., 45s)
• < 1 hour: Shows minutes + seconds like Xm Ys (e.g., 5m 30s, or 5m if no remaining seconds)
• < 1 day: Shows hours + minutes like Xh Ym (e.g., 2h 15m, or 2h if no remaining minutes)
• < 1 week: Shows approximate days like ~X days (e.g., ~3 days)
• >= 1 week: Shows approximate weeks like ~X weeks (e.g., ~2 weeks)

This addresses the issue where 447+ hours was displayed as raw hours/seconds. Now it would show as ~2 weeks or ~18 days instead, making it much clearer when a quota resets.

Closes #8170

opencode session  |  github run

[xiantang]

@rekram1-node add test cases for it?

[rekram1-node]

/oc can you make this function testable and then write some unit tests for it?

[opencode-agent]

Done! Here's a summary of the changes:

Changes made:

1. Created /packages/opencode/src/util/format.ts - Extracted the formatDuration function to a reusable utility module, making it testable and available for use elsewhere in the codebase.

2. Updated /packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx - Added import for formatDuration from the new utility module and removed the inline function definition.

3. Created /packages/opencode/test/util/format.test.ts - Comprehensive unit tests covering:

   • Zero and negative values
   • Seconds under a minute
   • Minutes under an hour (with and without remaining seconds)
   • Hours under a day (with and without remaining minutes)
   • Days under a week (singular and plural)
   • Weeks (singular and plural)
   • Boundary values at each threshold

opencode session  |  github run

[rekram1-node]

/review

[github-actions]

lgtm