feat: display user biomarker results with severity indicators and visual scale bars on dashboard

backend/src/handlers/sources.rs

@@ -7,13 +7,13 @@ use axum::{
 };
 use axum_extra::extract::Multipart;
 use chrono::Utc;
-use sea_orm::{ActiveModelTrait, DatabaseConnection, EntityTrait, Set};
+use sea_orm::{ActiveModelTrait, ColumnTrait, DatabaseConnection, EntityTrait, QueryFilter, Set};
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 use tokio::fs;
 use tokio::io::AsyncWriteExt;
 
-use crate::models::bio::source;
+use crate::models::bio::{biomarker_entry, source};
 
 /// Response for a source.
 #[derive(Serialize)]
@@ -215,6 +215,13 @@ pub async fn delete_source(
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
         .ok_or(StatusCode::NOT_FOUND)?;
 
+    // Delete related biomarker entries first (cascade delete)
+    biomarker_entry::Entity::delete_many()
+        .filter(biomarker_entry::Column::SourceId.eq(id))
+        .exec(&state.db)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
     // Delete file from disk
     if let Err(e) = fs::remove_file(&s.file_path).await {
         tracing::warn!("Failed to delete file {}: {:?}", s.file_path, e);