Statusline "today" shows $0.00 due to timezone defaulting to UTC

[CaffiendDevKit]

When using ccusage statusline, the "today" value shows $0.00 even though ccusage daily correctly shows usage for the current day. This appears to be a timezone issue - the statusline seems to default to UTC rather than detecting the local timezone.

Environment:

ccusage: 16.1.2
Runtime: Bun 1.3.5
OS: Ubuntu (WSL2)
Timezone: Australia/Perth (UTC+8)

Steps to reproduce:

Be in a timezone significantly offset from UTC (e.g., UTC+8)
Use Claude Code during local daytime hours
Configure statusline in ~/.claude/settings.json
Observe "today" shows $0.00 while "session" correctly increments
Run bunx ccusage daily - shows correct usage for the day

Workaround:

Creating a ccusage.json config file in the ~/.claude. directory with the timezone setting resolves the issue.

{
  "$schema": "https://ccusage.com/config-schema.json",
  "defaults": {
    "timezone": "Australia/Perth"
  }
}

Suggestion:

Consider having the statusline default to the system's local timezone (like daily appears to do) rather than UTC, or document that timezone configuration is required for accurate "today" aggregation.