feat(hosts): per-host tags edit + dashboard chip-row filter (P4-07)

web/templates/pages/dashboard.html

@@ -125,10 +125,25 @@
       <div class="flex items-center justify-between mb-3">
         <div class="flex items-center gap-3">
           <h2 class="text-[13px] font-semibold tracking-[0.01em]">Hosts</h2>
-          <div class="text-xs text-ink-fade">{{$page.HostCount}} of {{$page.HostCount}}</div>
+          <div class="text-xs text-ink-fade">{{$page.ShownCount}} of {{$page.HostCount}}</div>
         </div>
       </div>
 
+      {{/* Tag chip-row — only renders when at least one tag exists in
+           the fleet. Active tag is highlighted; clicking the active
+           tag clears the filter. The "All" pill is shown in the active
+           state when no tag filter is set. */}}
+      {{if $page.KnownTags}}
+        <div class="flex items-center gap-1.5 flex-wrap mb-3 text-[11.5px]">
+          <span class="text-ink-fade mr-1">filter</span>
+          <a href="/" class="tag {{if eq $page.ActiveTag ""}}tag-active{{end}}">All</a>
+          {{range $page.KnownTags}}
+            {{$t := .}}
+            <a href="/?tag={{$t}}" class="tag {{if eq $page.ActiveTag $t}}tag-active{{end}}">{{$t}}</a>
+          {{end}}
+        </div>
+      {{end}}
+
       <div class="panel rounded-[7px] overflow-hidden">
 
         <div class="host-row head hairline">