feat(web): tools and MCP section in Agent settings, tool call IO drawer

Settings > Agent: MCP server card (endpoint, enable switch, allowed API keys,
live sessions, recent calls, copyable client config without secrets) and the
capability list (scope, risk, idempotency/replay, authorization state, 7-day
calls and failure rate, last call, schema sheet). Agent session tool cards get
a drawer with input/output schema and the redacted input/output of the call.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/web/app/components/settings/agent.tsx

@@ -1,3 +1,4 @@
+import { AgentToolsBlock } from "./agent-tools.tsx";
 import { PiUpstreamsBlock } from "./pi-upstreams.tsx";
 import type { FieldValue } from "./resource-section.tsx";
 import { num, str } from "./resource-section.tsx";
@@ -194,6 +195,7 @@ export function AgentSection() {
           </>
         )}
       </SettingsGate>
+      <AgentToolsBlock />
     </div>
   );
 }