Fix field name mismatches, add events filter, in-place suppression refresh

- links.html: fix all field name bugs (auto_negotiation→autoneg, full_duplex,
  tx/rx_errors/drops_per_sec→_rate, tx/rx_bytes_per_sec→_rate, poe_total_w/poe_max_w
  computed from ports, renderUnifiSwitches uses top-level updated timestamp)
- suppressions.html: in-place DOM refresh after create/remove (no page reload),
  datalist autocomplete for target names, form reset after submit
- inspector.html: ESC key closes detail panel via lt.keys.on
- index.html: events filter bar with search input + severity pills (All/Critical/Warning),
  MutationObserver re-applies filter after dynamic updates
- style.css: g-section-actions, events-filter-bar, sev-pills layout
- app.js/db.py/monitor.py: carry forward prior session fixes (Promise.allSettled,
  daemon_ok, stale connection handling, double Prometheus call, self.cfg fix)

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

static/style.css

@@ -40,6 +40,31 @@
   --glow-xl:     0 0 8px var(--accent-green), 0 0 20px rgba(0,255,136,.5);
 }
 
+/* ── Light theme overrides for dim/glow variables ────────────────── */
+[data-theme="light"] {
+  --green-dim:   rgba(0,160,80,.08);
+  --green-muted: rgba(0,160,80,.45);
+  --amber-dim:   rgba(180,120,0,.07);
+  --cyan-dim:    rgba(0,140,180,.08);
+  --red-dim:     rgba(200,30,60,.06);
+  --orange-dim:  rgba(180,80,0,.06);
+  --glow:        none;
+  --glow-amber:  none;
+  --glow-red:    none;
+  --glow-cyan:   none;
+  --glow-xl:     none;
+}
+
+/* ── Refresh button loading state ────────────────────────────────── */
+[data-action="refresh"].is-loading {
+  opacity: .5;
+  pointer-events: none;
+  cursor: wait;
+}
+[data-action="refresh"].is-loading::after {
+  content: '…';
+}
+
 /* ── Animations used by custom components ─────────────────────────── */
 @keyframes pulse-red {
   0%,100% { box-shadow: 0 0 0 0 rgba(255,45,85,.5); }
@@ -85,6 +110,10 @@
   border: 1px solid var(--border-color);
   padding: 1px 7px;
 }
+.g-section-actions  { margin-left: auto; }
+.events-filter-bar  { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
+.events-filter-bar .lt-input-sm { width: 220px; }
+.sev-pills          { display: flex; gap: 4px; }
 .g-page-header { margin-bottom: 20px; }
 .g-page-title {
   font-size: 1em;