feat: 3D-Statistik Tool mit Haushaltsbuch, Diagrammen und Ausgaben-Tracker

backend/src/db.js

@@ -590,4 +590,17 @@ db.exec(`
   )
 `);
 
+// 3D-Druck Ausgaben (Haushaltsbuch)
+db.exec(`
+  CREATE TABLE IF NOT EXISTS expenses (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id     INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    date        TEXT NOT NULL,
+    category    TEXT NOT NULL DEFAULT 'Sonstiges',
+    description TEXT NOT NULL,
+    amount      REAL NOT NULL,
+    created_at  DATETIME DEFAULT CURRENT_TIMESTAMP
+  )
+`);
+
 module.exports = db;