TDS polish: lt-frame tables, links search toolbar, dead CSS cleanup

- index.html: wrap UniFi devices table in lt-frame with section header
- links.html: add static lt-toolbar with lt-search filter and collapse
  controls above the dynamic container; remove collapse bar from
  renderLinks() since it's now static; add applyLinksSearch() to
  filter host/switch panels by name as user types
- suppressions.html: wrap Available Targets section in lt-frame
- style.css: remove unused .link-summary-panel and related rules
  (replaced by lt-stats-grid in previous commit)

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

static/style.css

@@ -724,20 +724,6 @@
   background: linear-gradient(90deg, transparent, var(--cyan), transparent);
 }
 
-/* Link health summary */
-.link-summary-panel {
-  background: var(--bg2);
-  border: 1px solid var(--border-color);
-  padding: 12px 16px;
-  margin-bottom: 12px;
-}
-.link-summary-panel.link-summary-has-alerts { border-color: var(--amber); }
-.link-summary-grid  { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-end; }
-.link-summary-stat  { min-width: 80px; }
-.link-summary-stat.lss-alert .lss-label { color: var(--amber); }
-.lss-label { display: block; font-size: .62em; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 2px; }
-.lss-value { font-size: 1.2em; font-weight: bold; color: var(--text); }
-.lss-sub   { font-size: .7em; color: var(--text-muted); font-weight: normal; }
 
 .link-loading { padding: 20px; text-align: center; color: var(--text-muted); font-size: .8em; }
 .link-loading::after { content: ' ...'; animation: blink 1s step-end infinite; }