fix: suppress pre-existing no-explicit-any lint in chat.ts test mock

The options parameter in __setCreateFnAgent's inline arrow already
uses any to match the module-level let (which has its own suppress
comment). Add the missing eslint-disable-next-line so CI passes.

Unrelated to the spinner fix — pre-existing on main.

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

packages/dashboard/src/chat.ts

@@ -1231,6 +1231,7 @@ export function __setCreateFnAgent(mock: typeof createFnAgent): void {
   // hit the real engine. Mirror the same fake into the resolved-session slot
   // so existing test setups that only call `__setCreateFnAgent` continue to
   // work.
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   createResolvedAgentSession = (async (options: any) => mock(options)) as typeof createResolvedAgentSession;
 }