Rename Agents to Applications, remove Exchanges, implement Routes search

- Rename "Agents" scope/labels to "Applications" throughout command palette
- Remove "Exchanges" scope (was disabled placeholder)
- Implement "Routes" scope: derives routes from agents' routeIds, filterable
  by route ID or owning application name
- Selecting a route filters executions by routeId
- Route results show purple icon, route ID, and owning application(s)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/pages/executions/SearchFilters.tsx

@@ -1,7 +1,7 @@
 import { useRef, useEffect, useCallback } from 'react';
 import { useExecutionSearch } from './use-execution-search';
 import { useCommandPalette } from '../../components/command-palette/use-command-palette';
-import { usePaletteSearch, type PaletteResult } from '../../components/command-palette/use-palette-search';
+import { usePaletteSearch, type PaletteResult, type RouteInfo } from '../../components/command-palette/use-palette-search';
 import { PaletteInput } from '../../components/command-palette/PaletteInput';
 import { ScopeTabs } from '../../components/command-palette/ScopeTabs';
 import { ResultsList } from '../../components/command-palette/ResultsList';
@@ -27,7 +27,7 @@ export function SearchFilters() {
   const { isOpen, close, scope, setScope, selectedIndex, setSelectedIndex, reset, filters } =
     useCommandPalette();
   const openPalette = useCommandPalette((s) => s.open);
-  const { results, executionCount, agentCount, isLoading } = usePaletteSearch();
+  const { results, executionCount, applicationCount, routeCount, isLoading } = usePaletteSearch();
   const dropdownRef = useRef<HTMLDivElement>(null);
 
   const handleSelect = useCallback(
@@ -39,13 +39,20 @@ export function SearchFilters() {
         execSearch.setRouteId('');
         execSearch.setAgentId('');
         execSearch.setProcessorType('');
-      } else if (result.type === 'agent') {
+      } else if (result.type === 'application') {
         const agent = result.data as AgentInstance;
         execSearch.setStatus(['COMPLETED', 'FAILED', 'RUNNING']);
         execSearch.setAgentId(agent.id);
         execSearch.setText('');
         execSearch.setRouteId('');
         execSearch.setProcessorType('');
+      } else if (result.type === 'route') {
+        const route = result.data as RouteInfo;
+        execSearch.setStatus(['COMPLETED', 'FAILED', 'RUNNING']);
+        execSearch.setRouteId(route.routeId);
+        execSearch.setText('');
+        execSearch.setAgentId('');
+        execSearch.setProcessorType('');
       }
       for (const f of filters) {
         if (f.key === 'status') execSearch.setStatus([f.value.toUpperCase()]);
@@ -75,7 +82,7 @@ export function SearchFilters() {
   // Keyboard handling when open
   useEffect(() => {
     if (!isOpen) return;
-    const SCOPES = ['all', 'executions', 'agents'] as const;
+    const SCOPES = ['all', 'executions', 'applications', 'routes'] as const;
     function handleKeyDown(e: KeyboardEvent) {
       switch (e.key) {
         case 'Escape':
@@ -127,7 +134,7 @@ export function SearchFilters() {
           {isOpen ? (
             <div className={styles.paletteInline}>
               <PaletteInput />
-              <ScopeTabs executionCount={executionCount} agentCount={agentCount} />
+              <ScopeTabs executionCount={executionCount} applicationCount={applicationCount} routeCount={routeCount} />
               <ResultsList results={results} isLoading={isLoading} onSelect={handleSelect} />
               <PaletteFooter />
             </div>