add process step constants, channel/result label maps

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/shared/lib/constants.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from "vitest";
+import { PROZESS_SCHRITTE } from "./constants";
+
+describe("PROZESS_SCHRITTE", () => {
+	it("has 6 steps in correct order", () => {
+		expect(PROZESS_SCHRITTE).toHaveLength(6);
+		expect(PROZESS_SCHRITTE[0].key).toBe("neu");
+		expect(PROZESS_SCHRITTE[5].key).toBe("antrag_gestellt");
+	});
+
+	it("every step has label and description", () => {
+		for (const step of PROZESS_SCHRITTE) {
+			expect(step.label).toBeTruthy();
+			expect(step.beschreibung).toBeTruthy();
+		}
+	});
+});