Introduce background data refresh so the dashboard stays current without
restarting. This touches four layers:
Config (config.go):
- New TUIConfig struct with AutoRefresh (bool) and RefreshIntervalSec
(int) fields, defaulting to enabled at 30-second intervals.
- Minimum interval floor of 10 seconds enforced at load time.
App core (app.go):
- RefreshDataMsg type for background refresh completion signaling.
- Auto-refresh state: interval timer, refreshing flag, lastRefresh
timestamp. Checked on every tick; fires refreshDataCmd when elapsed.
- refreshDataCmd: background goroutine that loads session data via cache
(with uncached fallback) and posts RefreshDataMsg on completion.
- Manual refresh keybind: 'r' triggers immediate refresh.
- Auto-refresh toggle keybind: 'R' toggles auto-refresh and persists
the preference to config.toml.
- Help text updated with r/R keybind documentation.
Status bar (statusbar.go):
- Shows spinning refresh indicator during active refresh.
- Shows auto-refresh icon when auto-refresh is enabled.
Settings tab (tab_settings.go):
- Two new editable fields: Auto Refresh (bool) and Refresh Interval
(seconds with 10s minimum).
- Settings display reads live App state to stay consistent with the
R toggle keybind (avoids stale config-file reads).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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