Add status bar contribution host

frontend/src/App.svelte

@@ -2,6 +2,7 @@
   import PluginManager from './lib/plugin-manager/PluginManager.svelte';
   import Sidebar from './lib/shell/Sidebar.svelte';
   import CommandPalette from './lib/shell/CommandPalette.svelte';
+  import StatusBar from './lib/shell/StatusBar.svelte';
   import ViewContainer from './lib/shell/ViewContainer.svelte';
   import VaultSelection from './lib/shell/VaultSelection.svelte';
   import WorkbenchHost from './lib/shell/WorkbenchHost.svelte';
@@ -295,16 +296,19 @@
     <Sidebar />
     <CommandPalette />
 
-    <section class="content scroll-surface">
-      {#if currentView === 'plugin-manager'}
-        <PluginManager {activeSettingsPluginId} {activeSettingsPanelId} />
-      {:else if currentView === 'workbench'}
-        <WorkbenchHost {openedResource} />
-      {:else if currentView === 'workspace'}
-        <WorkspaceHost selectedWorkspaceName={selectedWorkspaceName} nodes={workspaceNodes} />
-      {:else}
-        <ViewContainer {activeView} {activeViewPluginId} />
-      {/if}
+    <section class="content-shell">
+      <section class="content scroll-surface">
+        {#if currentView === 'plugin-manager'}
+          <PluginManager {activeSettingsPluginId} {activeSettingsPanelId} />
+        {:else if currentView === 'workbench'}
+          <WorkbenchHost {openedResource} />
+        {:else if currentView === 'workspace'}
+          <WorkspaceHost selectedWorkspaceName={selectedWorkspaceName} nodes={workspaceNodes} />
+        {:else}
+          <ViewContainer {activeView} {activeViewPluginId} />
+        {/if}
+      </section>
+      <StatusBar />
     </section>
   </main>
 {/if}
@@ -460,6 +464,14 @@
     overflow: hidden;
   }
 
+  .content-shell {
+    flex: 1;
+    min-width: 0;
+    min-height: 0;
+    display: flex;
+    flex-direction: column;
+  }
+
   .content {
     flex: 1;
     min-width: 0;

frontend/src/lib/shell/StatusBar.svelte

@@ -0,0 +1,102 @@
+<script>
+  import { onDestroy, onMount } from 'svelte';
+  import * as App from '../../../wailsjs/go/api/App';
+
+  let items = [];
+  $: leftItems = items.filter((item) => item.position === 'left');
+  $: centerItems = items.filter((item) => item.position === 'center');
+  $: rightItems = items.filter((item) => item.position === 'right');
+
+  const inactiveStatuses = new Set(['disabled', 'failed', 'incompatible', 'missing-required-capability']);
+
+  async function loadStatusBar() {
+    const [plugins, contributions] = await Promise.all([
+      App.GetPlugins().catch(() => []),
+      App.GetContributions().catch(() => ({})),
+    ]);
+    const pluginById = new Map((plugins || []).map((plugin) => [plugin.manifest?.id, plugin]));
+    items = (contributions.statusBarItems || [])
+      .filter((item) => {
+        const plugin = pluginById.get(item.pluginId);
+        if (!plugin) return false;
+        return !inactiveStatuses.has(plugin.status);
+      })
+      .map((item) => ({
+        ...item,
+        position: item.position || 'left',
+      }));
+  }
+
+  onMount(() => {
+    loadStatusBar();
+    window.addEventListener('verstak:plugins-changed', loadStatusBar);
+  });
+
+  onDestroy(() => {
+    window.removeEventListener('verstak:plugins-changed', loadStatusBar);
+  });
+</script>
+
+<footer class="status-bar" aria-label="Status bar">
+  <div class="status-bar-group status-left">
+    {#each leftItems as item}
+      <span class="status-bar-item" data-status-item-id={item.id} title={item.pluginId}>
+        {item.label || item.id}
+      </span>
+    {/each}
+  </div>
+  <div class="status-bar-group status-center">
+    {#each centerItems as item}
+      <span class="status-bar-item" data-status-item-id={item.id} title={item.pluginId}>
+        {item.label || item.id}
+      </span>
+    {/each}
+  </div>
+  <div class="status-bar-group status-right">
+    {#each rightItems as item}
+      <span class="status-bar-item" data-status-item-id={item.id} title={item.pluginId}>
+        {item.label || item.id}
+      </span>
+    {/each}
+  </div>
+</footer>
+
+<style>
+  .status-bar {
+    min-height: 1.7rem;
+    display: grid;
+    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
+    align-items: center;
+    gap: 0.5rem;
+    padding: 0.2rem 0.65rem;
+    border-top: 1px solid #16213e;
+    background: #111629;
+    color: #9fb2ca;
+    font-size: 0.74rem;
+  }
+
+  .status-bar-group {
+    min-width: 0;
+    display: flex;
+    align-items: center;
+    gap: 0.4rem;
+    overflow: hidden;
+  }
+
+  .status-center {
+    justify-content: center;
+  }
+
+  .status-right {
+    justify-content: flex-end;
+  }
+
+  .status-bar-item {
+    max-width: 18rem;
+    overflow: hidden;
+    padding: 0.12rem 0.35rem;
+    border-radius: 4px;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+</style>