fix: live SSH update log re-renders in modal (v0.5.7)

Remove cached openLogs computed that blocked Vue updates to output/loading; preserve log tail on empty poll; auto-scroll log panel.

frontend/src/components/HostActionLogStack.vue

@@ -1,18 +1,19 @@
 <template>
-  <div v-if="openLogs.length" class="host-action-log-stack" aria-live="polite">
-    <HostActionLogModal
-      v-for="entry in openLogs"
-      :key="entry.id"
-      :open="true"
-      :title="entry.title"
-      :loading="entry.loading"
-      :ok="entry.ok"
-      :message="entry.message"
-      :output="entry.output"
-      :log-visible="entry.logVisible"
-      @close="closeHostRemoteActionLog(entry.id)"
-      @toggle-log="toggleHostRemoteActionLog(entry.id)"
-    />
+  <div v-if="hasOpenLogs" class="host-action-log-stack" aria-live="polite">
+    <template v-for="entry in hostRemoteActionLogs" :key="entry.id">
+      <HostActionLogModal
+        v-if="entry.open"
+        :open="true"
+        :title="entry.title"
+        :loading="entry.loading"
+        :ok="entry.ok"
+        :message="entry.message"
+        :output="entry.output"
+        :log-visible="entry.logVisible"
+        @close="closeHostRemoteActionLog(entry.id)"
+        @toggle-log="toggleHostRemoteActionLog(entry.id)"
+      />
+    </template>
   </div>
 </template>
 
@@ -25,7 +26,7 @@ import {
   toggleHostRemoteActionLog,
 } from "../composables/useHostRemoteAction";
 
-const openLogs = computed(() => hostRemoteActionLogs.filter((e) => e.open));
+const hasOpenLogs = computed(() => hostRemoteActionLogs.some((e) => e.open));
 </script>
 
 <style scoped>