feat(sidebar): mark Agent entries as Agent or Pipeline

Add a trailing badge (icon + label) to each entry in the sidebar Agent
section so users can tell Agent orchestration apart from legacy Pipeline.
Thread the agent `kind` field through SidebarEntityItem.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/app/home/components/home-sidebar/HomeSidebar.tsx

@@ -32,6 +32,8 @@ import {
   Server,
   Puzzle,
   RefreshCcw,
+  Bot,
+  Workflow,
 } from 'lucide-react';
 import { useTheme } from '@/components/providers/theme-provider';
 
@@ -774,6 +776,18 @@ function NavItems({
                           />
                         ) : null}
                         <span className="truncate">{item.name}</span>
+                        {item.kind && (
+                          <span className="ml-auto flex shrink-0 items-center gap-0.5 text-[10px] text-muted-foreground">
+                            {item.kind === 'pipeline' ? (
+                              <Workflow className="size-3" />
+                            ) : (
+                              <Bot className="size-3" />
+                            )}
+                            {item.kind === 'pipeline'
+                              ? t('agents.kindBadgePipeline')
+                              : t('agents.kindBadgeAgent')}
+                          </span>
+                        )}
                         {item.debug && (
                           <Bug className="size-3.5 shrink-0 text-orange-400" />
                         )}

web/src/app/home/components/home-sidebar/SidebarDataContext.tsx

@@ -28,6 +28,8 @@ export interface SidebarEntityItem {
   debug?: boolean;
   // Set when this item appears in the unified extensions list
   extensionType?: 'plugin' | 'mcp' | 'skill';
+  // Agent-specific: distinguishes Agent orchestration from legacy Pipeline
+  kind?: 'agent' | 'pipeline';
 }
 
 // Plugin page registered by a plugin
@@ -123,6 +125,7 @@ export function SidebarDataProvider({
           description: p.description,
           emoji: p.emoji,
           updatedAt: p.updated_at,
+          kind: p.kind,
         })),
       );
     } catch (error) {