feat: Introduce note version history with dedicated UI, API, and database schema.

notes-api/src/dto.rs

@@ -146,3 +146,25 @@ pub struct UserResponse {
     pub email: String,
     pub created_at: DateTime<Utc>,
 }
+
+/// Note Version response DTO
+#[derive(Debug, Serialize)]
+pub struct NoteVersionResponse {
+    pub id: Uuid,
+    pub note_id: Uuid,
+    pub title: String,
+    pub content: String,
+    pub created_at: DateTime<Utc>,
+}
+
+impl From<notes_domain::NoteVersion> for NoteVersionResponse {
+    fn from(version: notes_domain::NoteVersion) -> Self {
+        Self {
+            id: version.id,
+            note_id: version.note_id,
+            title: version.title,
+            content: version.content,
+            created_at: version.created_at,
+        }
+    }
+}

notes-api/src/routes/mod.rs

@@ -28,6 +28,7 @@ pub fn api_v1_router() -> Router<AppState> {
                 .patch(notes::update_note)
                 .delete(notes::delete_note),
         )
+        .route("/notes/{id}/versions", get(notes::list_note_versions))
         // Search route
         .route("/search", get(notes::search_notes))
         // Import/Export routes

notes-api/src/routes/notes.rs

@@ -177,3 +177,28 @@ pub async fn search_notes(
 
     Ok(Json(response))
 }
+
+/// List versions of a note
+/// GET /api/v1/notes/:id/versions
+pub async fn list_note_versions(
+    State(state): State<AppState>,
+    auth: AuthSession<AuthBackend>,
+    Path(id): Path<Uuid>,
+) -> ApiResult<Json<Vec<crate::dto::NoteVersionResponse>>> {
+    let user = auth
+        .user
+        .ok_or(ApiError::Domain(notes_domain::DomainError::Unauthorized(
+            "Login required".to_string(),
+        )))?;
+    let user_id = user.id();
+
+    let service = NoteService::new(state.note_repo, state.tag_repo);
+
+    let versions = service.list_note_versions(id, user_id).await?;
+    let response: Vec<crate::dto::NoteVersionResponse> = versions
+        .into_iter()
+        .map(crate::dto::NoteVersionResponse::from)
+        .collect();
+
+    Ok(Json(response))
+}