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/objects/CloudFolderCreateManyUserInput.schema.ts

@@ -6,6 +6,7 @@ const makeSchema = () => z.object({
   id: z.number().int().optional(),
   name: z.string(),
   parentId: z.number().int().optional().nullable(),
+  patientId: z.number().int().optional().nullable(),
   createdAt: z.coerce.date().optional(),
   updatedAt: z.coerce.date().optional()
 }).strict();