refactor: complete application rewrite with modern UI

src/models/types.ts

@@ -0,0 +1,13 @@
+/**
+ * Base interface for entities with optional ID
+ */
+export interface Entity {
+  id?: number;
+}
+
+/**
+ * Named entity with optional ID
+ */
+export interface NamedEntity extends Entity {
+  name?: string;
+}