fix(FN-2392): finalize squash merge conflict resolution

- Resolve merge markers across plugin loader, agents view, dashboard server tests, and engine pi session setup
- Keep current cache-busting and hook-guard implementations while removing stale branch-side fragments
- Preserve rate-limit test imports and useAgents-driven loading flow in dashboard agent UI
- Ensure workspace passes required verification gates with pnpm test and pnpm build

packages/engine/src/pi.ts

@@ -75,7 +75,6 @@ type AgentToolHookSession = AgentSession & {
   __fusionToolResultGuardInstalled?: boolean;
   __fusionMessageContentGuardInstalled?: boolean;
 };
-
 const FN_MEMORY_APPEND_TOOL_NAME = "fn_memory_append";
 
 function getSessionStateError(session: AgentSession): string {