CSS: replace remaining inline color/size styles with TDS utilities

- Stat card icons and values: style="color:var(--red)" etc replaced with
  lt-text-red, lt-text-amber, lt-text-cyan, lt-text-green (defined in
  base.css with both color and glow-shadow)
- Host search input: style="width:180px" extracted to .lt-search-input--sm
- base.html: suppress modal form groups use lt-form-group--last for last
  item (already committed); lt-divider--compact applied to settings divider

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

static/style.css

@@ -121,6 +121,9 @@
 /* ── Form group modifiers ────────────────────────────────────────── */
 .lt-form-group--last { margin-bottom: 0; }
 
+/* ── Search input size variant ───────────────────────────────────── */
+.lt-search-input--sm { width: 180px; }
+
 /* ── Divider compact variant ─────────────────────────────────────── */
 .lt-divider--compact { margin: 1rem 0 0.75rem; }