feat: save claim attachments to cloud storage and documents page

- Claim file uploads (chatbot or manual) now save to both the Cloud
  Storage patient folder and the Documents page via new
  POST /api/claims/upload-to-cloud endpoint
- MH submit flow now calls uploadAttachmentsToLocalFolder (same as
  DDMA/United/Tufts) so chatbot-attached X-rays are persisted
- Removed old /upload-attachments disk route and attachmentDiskStorage
  multer config; deleted uploads/patients/ folder
- uploadAttachmentsToLocalFolder now points to /upload-to-cloud and
  sends patientId so the backend can create the patient folder

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

apps/Frontend/src/components/claims/claim-form.tsx

@@ -899,11 +899,10 @@ export function ClaimForm({
       ...formToCreateClaim
     } = f;
 
-    // build claimFiles metadata from uploadedFiles (only filename + mimeType)
-    const claimFilesMeta: ClaimFileMeta[] = (uploadedFiles || []).map((f) => ({
-      filename: f.name,
-      mimeType: f.type,
-    }));
+    // Save uploaded files to disk (uploads/patients/<name>/) and record their paths
+    const claimFilesMeta: ClaimFileMeta[] = uploadedFiles?.length
+      ? await uploadAttachmentsToLocalFolder(uploadedFiles)
+      : [];
 
     const selectedNpiProviderId = npiProvider?.npiNumber
       ? npiProviders.find((p) => p.npiNumber === npiProvider.npiNumber)?.id ?? null
@@ -1423,10 +1422,11 @@ export function ClaimForm({
       : patient?.firstName ?? `patient-${patientId}`;
 
     const formData = new FormData();
+    formData.append("patientId", String(patientId));
     formData.append("patientName", patientName);
     files.forEach((f) => formData.append("files", f));
 
-    const res = await apiRequest("POST", "/api/claims/upload-attachments", formData);
+    const res = await apiRequest("POST", "/api/claims/upload-to-cloud", formData);
     const data = await res.json();
     return (data.data ?? []) as ClaimFileMeta[];
   };