Improve AI agent chat, tool display, and workflow agent management (#17876)

## Summary

- **Fix token renewal endpoint**: Use `/metadata` instead of `/graphql`
for token renewal in agent chat, fixing auth issues
- **Improve tool display**: Add `load_skills` support, show formatted
tool names (underscores → spaces) with finish/loading states, display
tool icons during loading, and support custom loading messages from tool
input
- **Refactor workflow agent management**: Replace direct
`AgentRepository` access with `AgentService` for create/delete/find
operations in workflow steps, improving encapsulation and consistency
- **Simplify Apollo client usage**: Remove explicit Apollo client
override in `useGetToolIndex`, add `AgentChatProvider` to
`AppRouterProviders`
- **Fix load-skill tool**: Change parameter type from `string` to `json`
for proper schema parsing
- **Update agent-chat-streaming**: Use `AgentService` for agent
resolution and tool registration instead of direct repository queries

## Test plan

- [ ] Verify AI agent chat works end-to-end (send message, receive
response)
- [ ] Verify tool steps display correctly with icons and proper messages
during loading and after completion
- [ ] Verify workflow AI agent step creation and deletion works
correctly
- [ ] Verify workflow version cloning preserves agent configuration
- [ ] Verify token renewal works when tokens expire during agent chat


Made with [Cursor](https://cursor.com)

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: cubic-dev-ai[bot] <191113872+cubic-dev-ai[bot]@users.noreply.github.com>

packages/twenty-server/src/engine/workspace-cache-storage/workspace-cache-storage.service.ts

@@ -17,7 +17,6 @@ export const METADATA_VERSIONED_WORKSPACE_CACHE_KEY = {
   MetadataObjectMetadataMaps: 'metadata:object-metadata-maps',
   GraphQLUsedScalarNames: 'graphql:used-scalar-names',
   ORMEntitySchemas: 'orm:entity-schemas',
-  ToolCatalog: 'tool-catalog',
 } as const;
 export const WORKSPACE_CACHE_KEYS = {
   GraphQLOperations: 'graphql:operations',
@@ -215,24 +214,6 @@ export class WorkspaceCacheStorageService {
     );
   }
 
-  setToolCatalog(
-    cacheKey: string,
-    descriptors: unknown[],
-    ttl: number,
-  ): Promise<void> {
-    return this.cacheStorageService.set<unknown[]>(
-      `${METADATA_VERSIONED_WORKSPACE_CACHE_KEY.ToolCatalog}:${cacheKey}`,
-      descriptors,
-      ttl,
-    );
-  }
-
-  getToolCatalog(cacheKey: string): Promise<unknown[] | undefined> {
-    return this.cacheStorageService.get<unknown[]>(
-      `${METADATA_VERSIONED_WORKSPACE_CACHE_KEY.ToolCatalog}:${cacheKey}`,
-    );
-  }
-
   async flush(workspaceId: string, metadataVersion?: number): Promise<void> {
     await this.flushVersionedMetadata(workspaceId, metadataVersion);