bug(dashboard): OverviewPage keyboard hint shows R=refresh but no handler exists

[OneStepAt4time]

Description

The OverviewPage renders keyboard shortcut hints at the bottom showing "R refresh", but there is no keydown handler for the R key. Only N (new session) is implemented.

Location

dashboard/src/pages/OverviewPage.tsx lines ~229-234:

<span><kbd>R</kbd> refresh</span>

The useEffect keyboard handler only handles n key:

if (e.key === ' && !isInput && ...) {
    e.preventDefault();
    setModalOpen(true);
}

Expected Behavior

Either:

1. Implement the R shortcut (call fetchAnalytics), OR
2. Remove the hint from the UI

Fix

Add R handler:

if (e.key === ' && !isInput && !e.ctrlKey && !e.metaKey && !e.altKey) {
    e.preventDefault();
    void fetchAnalytics();
}

Or remove the misleading hint.

Environment

• Aegis Dashboard (all versions with CCMeter overview)

[aegis-gh-agent]

Resolved by PR #4425 (merged on 2026-05-29).