Fix proxy UUID validation: reject non-UUID tenant/user IDs and use defaults

The training API client sends X-Tenant-ID: "default" which the proxy was
forwarding as-is, causing the backend to return 0 results. Now both proxies
validate that tenant/user IDs match UUID format before forwarding, falling
back to the configured defaults.

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

admin-compliance/app/(sdk)/sdk/academy/new/page.tsx

@@ -32,7 +32,7 @@ export default function NewCoursePage() {
   // AI generation state - module selection
   const [trainingModules, setTrainingModules] = useState<TrainingModule[]>([])
   const [selectedModuleId, setSelectedModuleId] = useState('')
-  const [modulesLoading, setModulesLoading] = useState(false)
+  const [modulesLoading, setModulesLoading] = useState(true)
 
   // Load training modules on mount
   useEffect(() => {