Add OIDC logout, fix OpenAPI schema types, expose end_session_endpoint

Backend:
- Expose end_session_endpoint from OIDC provider metadata in /auth/oidc/config
- Add getEndSessionEndpoint() to OidcTokenExchanger

Frontend:
- On OIDC logout, redirect to provider's end_session_endpoint to clear SSO session
- Strip /api/v1 prefix from OpenAPI paths to match client baseUrl convention
- Add schema-types.ts with convenience type re-exports from generated schema
- Fix all type imports to use schema-types instead of raw generated schema
- Fix optional field access (processors, children, duration) with proper typing
- Fix AgentInstance.state → status field name

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/command-palette/ResultItem.tsx

@@ -1,4 +1,4 @@
-import type { ExecutionSummary, AgentInstance } from '../../api/schema';
+import type { ExecutionSummary, AgentInstance } from '../../api/schema-types';
 import type { PaletteResult, RouteInfo } from './use-palette-search';
 import { highlightMatch, formatRelativeTime } from './utils';
 import { AppBadge } from '../shared/AppBadge';
@@ -93,7 +93,7 @@ function ApplicationResult({ data, query }: { data: AgentInstance; query: string
       <div className={styles.resultBody}>
         <div className={styles.resultTitle}>
           <HighlightedText text={data.id} query={query} />
-          <span className={stateBadgeClass(data.state)}>{data.state}</span>
+          <span className={stateBadgeClass(data.status)}>{data.status}</span>
         </div>
         <div className={styles.resultMeta}>
           <span>group: {data.group}</span>

ui/src/components/command-palette/use-palette-search.ts

@@ -1,6 +1,6 @@
 import { useQuery } from '@tanstack/react-query';
 import { api } from '../../api/client';
-import type { ExecutionSummary, AgentInstance } from '../../api/schema';
+import type { ExecutionSummary, AgentInstance } from '../../api/schema-types';
 import { useCommandPalette, type PaletteScope } from './use-command-palette';
 import { useDebouncedValue } from './utils';
 
@@ -51,7 +51,7 @@ export function usePaletteSearch() {
         },
       });
       if (error) throw new Error('Search failed');
-      return data!;
+      return data as unknown as { data: ExecutionSummary[]; total: number };
     },
     enabled: isOpen && isExecutionScope(scope),
     placeholderData: (prev) => prev,
@@ -64,7 +64,7 @@ export function usePaletteSearch() {
         params: { query: {} },
       });
       if (error) throw new Error('Failed to load agents');
-      return data!;
+      return data as unknown as AgentInstance[];
     },
     enabled: isOpen && (isApplicationScope(scope) || isRouteScope(scope)),
     staleTime: 30_000,