Revert upper-third centering — inconsistent start positions across tabs
felt jumpy. Back to standard top-align with consistent table placement.
Demo GIF now pauses on Nodes tab (cluster view is a selling point) and
skips Maint/Users quickly instead of sprinting through all three.
Tables on tabs with few rows (Alerts, Nodes, Maint, Users) now sit in
the upper third of the viewport instead of flush against the tab bar.
Dense tabs like Monitors and Logs fill naturally and are unaffected.
Strip Go module pseudo-version suffix (timestamp+hash+dirty) from the
footer version string — shows "v0.1.0" instead of the full build
metadata. Rename "Sites" tab and breadcrumbs to "Monitors" for
consistency with README, CLI help, and user-facing docs.