Improve onboarding defaults and issue goal fallback

ui/src/lib/onboarding-goal.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "vitest";
+import { parseOnboardingGoalInput } from "./onboarding-goal";
+
+describe("parseOnboardingGoalInput", () => {
+  it("uses a single-line goal as the title only", () => {
+    expect(parseOnboardingGoalInput("Ship the MVP")).toEqual({
+      title: "Ship the MVP",
+      description: null,
+    });
+  });
+
+  it("splits a multiline goal into title and description", () => {
+    expect(
+      parseOnboardingGoalInput(
+        "Ship the MVP\nLaunch to 10 design partners\nMeasure retention",
+      ),
+    ).toEqual({
+      title: "Ship the MVP",
+      description: "Launch to 10 design partners\nMeasure retention",
+    });
+  });
+});

ui/src/lib/onboarding-goal.ts

@@ -0,0 +1,18 @@
+export function parseOnboardingGoalInput(raw: string): {
+  title: string;
+  description: string | null;
+} {
+  const trimmed = raw.trim();
+  if (!trimmed) {
+    return { title: "", description: null };
+  }
+
+  const [firstLine, ...restLines] = trimmed.split(/\r?\n/);
+  const title = firstLine.trim();
+  const description = restLines.join("\n").trim();
+
+  return {
+    title,
+    description: description.length > 0 ? description : null,
+  };
+}