Add isPermanentlyDeleted field to Note model and update sync logic

docs/API.md

@@ -181,6 +181,7 @@ Body ejemplo:
         "serverVersion": 1,
         "position": 2000,
         "isDeleted": true,
+        "isPermanentlyDeleted": false,
         "updatedAt": "2026-05-18T10:10:00.000Z"
       }
     ]
@@ -239,6 +240,7 @@ Campos:
 - `serverVersion`: `number` entero >= 0, obligatorio. Es la versión base local con la que se hizo el cambio.
 - `position`: `number`, opcional.
 - `isDeleted`: `boolean`, opcional, por defecto `false`.
+- `isPermanentlyDeleted`: `boolean`, opcional, por defecto `false`. Si llega en `true`, el servidor guarda la nota con `encrypted_title` y `encrypted_body` vacíos, `position` en `0` y `isDeleted` en `true`.
 - `updatedAt`: `ISO date string`, opcional (solo informativo para UI).
 
 #### Response
@@ -260,6 +262,7 @@ Respuesta ejemplo (nuevo contrato):
         "serverVersion": 3,
         "position": 0,
         "isDeleted": false,
+        "isPermanentlyDeleted": false,
         "updatedAt": "2026-05-18T10:15:00.000Z"
       }
     ]

src/models/Note.js

@@ -27,6 +27,10 @@ const Note = sequelize.define('Note', {
   isDeleted: {
     type: DataTypes.BOOLEAN,
     defaultValue: false
+  },
+  isPermanentlyDeleted: {
+    type: DataTypes.BOOLEAN,
+    defaultValue: false
   }
 });
 

src/services/syncService.js

@@ -26,10 +26,27 @@ const normalizeNote = (note) => ({
   encrypted_body: note.encrypted_body,
   position: note.position,
   isDeleted: Boolean(note.isDeleted),
+  isPermanentlyDeleted: Boolean(note.isPermanentlyDeleted),
   serverVersion: note.serverVersion || 1,
   updatedAt: note.updatedAt instanceof Date ? note.updatedAt.toISOString() : toIso(note.updatedAt)
 });
 
+const buildStoredNoteData = (incomingNote, existingNote = null) => {
+  const isPermanentlyDeleted = Boolean(incomingNote.isPermanentlyDeleted);
+  const position = isPermanentlyDeleted
+    ? 0
+    : (incomingNote.position ?? existingNote?.position ?? 0);
+
+  return {
+    categoryId: incomingNote.categoryId || null,
+    encrypted_title: isPermanentlyDeleted ? '' : incomingNote.encrypted_title,
+    encrypted_body: isPermanentlyDeleted ? '' : incomingNote.encrypted_body,
+    position,
+    isDeleted: Boolean(incomingNote.isDeleted) || isPermanentlyDeleted,
+    isPermanentlyDeleted
+  };
+};
+
 const getIncomingVersion = (entityName, incoming) => {
   if (!Number.isInteger(incoming.serverVersion) || incoming.serverVersion < 0) {
     throw new Error(`Cada ${entityName} debe incluir serverVersion como entero >= 0`);
@@ -90,7 +107,9 @@ class SyncService {
       }
 
       for (const incomingNote of incomingNotes) {
-        if (!incomingNote.id || !incomingNote.encrypted_title || !incomingNote.encrypted_body) {
+        const isPermanentlyDeleted = Boolean(incomingNote.isPermanentlyDeleted);
+
+        if (!incomingNote.id || (!isPermanentlyDeleted && (!incomingNote.encrypted_title || !incomingNote.encrypted_body))) {
           throw new Error('Cada nota debe incluir id, encrypted_title y encrypted_body');
         }
 
@@ -102,14 +121,12 @@ class SyncService {
         });
 
         if (!existingNote) {
+          const storedNoteData = buildStoredNoteData(incomingNote);
+
           await Note.create({
             id: incomingNote.id,
             userId,
-            categoryId: incomingNote.categoryId || null,
-            encrypted_title: incomingNote.encrypted_title,
-            encrypted_body: incomingNote.encrypted_body,
-            position: incomingNote.position ?? 0,
-            isDeleted: Boolean(incomingNote.isDeleted),
+            ...storedNoteData,
             serverVersion: 1
           }, { transaction });
           continue;
@@ -118,24 +135,20 @@ class SyncService {
         const serverVersion = existingNote.serverVersion || 1;
 
         if (incomingBaseVersion === serverVersion) {
+          const storedNoteData = buildStoredNoteData(incomingNote, existingNote);
+
           await existingNote.update({
-            categoryId: incomingNote.categoryId || null,
-            encrypted_title: incomingNote.encrypted_title,
-            encrypted_body: incomingNote.encrypted_body,
-            position: incomingNote.position ?? existingNote.position,
-            isDeleted: Boolean(incomingNote.isDeleted),
+            ...storedNoteData,
             serverVersion: serverVersion + 1
           }, { transaction });
         } else if (serverVersion > incomingBaseVersion) {
           // Server version is newer -> create a new note with incoming content so user sees a duplicate
+          const storedNoteData = buildStoredNoteData(incomingNote);
+
           await Note.create({
             id: randomUUID(),
             userId,
-            categoryId: incomingNote.categoryId || null,
-            encrypted_title: incomingNote.encrypted_title,
-            encrypted_body: incomingNote.encrypted_body,
-            position: incomingNote.position ?? 0,
-            isDeleted: Boolean(incomingNote.isDeleted),
+            ...storedNoteData,
             serverVersion: 1
           }, { transaction });
         } else {