feat: add per-patient Local folder in Documents page backed by Cloud Storage

- Documents page shows a "Local Folder" card for each selected patient
  with an "Open in Cloud Storage" button that deep-links to their folder
- Cloud Storage page reads ?folderId URL param on mount and auto-opens
  the folder panel for seamless navigation from Documents
- Backend: GET /api/cloud-storage/patient-folder/:patientId endpoint
  that idempotently gets or creates a top-level CloudFolder per patient
- CloudFolder schema gains optional patientId field linked to Patient
- Disk directories for cloud storage folders now use the folder's name
  (e.g. "Xiaohui Wang/") instead of the opaque "folder-{id}/" path

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

packages/db/shared/schemas/findFirstCloudFolder.schema.ts

@@ -14,9 +14,11 @@ export const CloudFolderFindFirstSelectSchema: z.ZodType<Prisma.CloudFolderSelec
     userId: z.boolean().optional(),
     name: z.boolean().optional(),
     parentId: z.boolean().optional(),
+    patientId: z.boolean().optional(),
     parent: z.boolean().optional(),
     children: z.boolean().optional(),
     user: z.boolean().optional(),
+    patient: z.boolean().optional(),
     files: z.boolean().optional(),
     createdAt: z.boolean().optional(),
     updatedAt: z.boolean().optional(),
@@ -28,9 +30,11 @@ export const CloudFolderFindFirstSelectZodSchema = z.object({
     userId: z.boolean().optional(),
     name: z.boolean().optional(),
     parentId: z.boolean().optional(),
+    patientId: z.boolean().optional(),
     parent: z.boolean().optional(),
     children: z.boolean().optional(),
     user: z.boolean().optional(),
+    patient: z.boolean().optional(),
     files: z.boolean().optional(),
     createdAt: z.boolean().optional(),
     updatedAt: z.boolean().optional(),