Introduce a reusable Tooltip component with delayed hover reveal,
viewport-aware horizontal nudging, and smooth CSS entrance animation.
Supports top/bottom positioning via a data-side attribute.
FilterPanel now wraps the auto-redact checkbox in a Tooltip that
explains what auto-redaction detects. When sensitive messages exist
in the current view, a red pill badge displays the count next to
the label, giving users immediate visibility into how many messages
contain detectable secrets before toggling auto-redact on.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
