fix: delete invoice_items before invoice to prevent FK constraint failure

src-tauri/src/commands.rs

@@ -371,6 +371,7 @@ pub fn update_invoice(state: State<AppState>, invoice: Invoice) -> Result<(), St
 #[tauri::command]
 pub fn delete_invoice(state: State<AppState>, id: i64) -> Result<(), String> {
     let conn = state.db.lock().map_err(|e| e.to_string())?;
+    conn.execute("DELETE FROM invoice_items WHERE invoice_id = ?1", params![id]).map_err(|e| e.to_string())?;
     conn.execute("DELETE FROM invoices WHERE id = ?1", params![id]).map_err(|e| e.to_string())?;
     Ok(())
 }