Merge caitlin/CRM_ENVR: AI chat ref+health, tips panel, cyberpunk theme, app-shell/bg improvements

src/app/api/ai/health/route.ts

@@ -0,0 +1,7 @@
+import { NextResponse } from "next/server"
+import { checkAiServiceStatus } from "@/lib/ai"
+
+export async function GET() {
+  const ok = await checkAiServiceStatus()
+  return NextResponse.json({ status: ok ? "ok" : "unavailable" }, { status: ok ? 200 : 503 })
+}