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>

templates/suppressions.html

@@ -184,20 +184,27 @@
   <div class="g-section-header">
     <h2 class="g-section-title">Available Targets</h2>
   </div>
-  <div class="targets-grid">
-    {% for name, host in snapshot.hosts.items() %}
-    <div class="target-card">
-      <div class="target-name">{{ name }}</div>
-      <div class="target-type">{{ 'Proxmox Host (prometheus)' if host.source == 'prometheus' else 'Ping-only host' }}</div>
-      {% if host.interfaces %}
-      <div class="target-ifaces">
-        {% for iface in host.interfaces.keys() | sort %}
-        <code class="iface-chip">{{ iface }}</code>
+  <div class="lt-frame">
+    <span class="lt-frame-bl">&#x255A;</span>
+    <span class="lt-frame-br">&#x255D;</span>
+    <div class="lt-section-header">Host &amp; Interface Reference</div>
+    <div style="padding:12px 14px">
+      <div class="targets-grid">
+        {% for name, host in snapshot.hosts.items() %}
+        <div class="target-card">
+          <div class="target-name">{{ name }}</div>
+          <div class="target-type">{{ 'Proxmox Host (prometheus)' if host.source == 'prometheus' else 'Ping-only host' }}</div>
+          {% if host.interfaces %}
+          <div class="target-ifaces">
+            {% for iface in host.interfaces.keys() | sort %}
+            <code class="iface-chip">{{ iface }}</code>
+            {% endfor %}
+          </div>
+          {% endif %}
+        </div>
         {% endfor %}
       </div>
-      {% endif %}
     </div>
-    {% endfor %}
   </div>
 </section>