refactor(maestro): extract the spawn form so it can live outside the modal

web/src/spawnForm.test.ts

@@ -0,0 +1,59 @@
+import { describe, expect, it } from "vitest";
+
+import { buildSpawnRequest, type SpawnFormValues } from "./spawnForm.js";
+
+const base: SpawnFormValues = {
+  command: "claude",
+  cwd: "/home/user/project",
+  name: "amber-fox",
+  worktreeEnabled: false,
+  worktreeBranch: "",
+  worktreeCleanup: false,
+};
+
+describe("buildSpawnRequest", () => {
+  it("builds a plain request with the picked cwd and command", () => {
+    const res = buildSpawnRequest(base, null);
+    expect(res).toEqual({
+      req: { cwd: "/home/user/project", command: "claude", metadata: { name: "amber-fox" } },
+    });
+  });
+
+  it("omits metadata.name when the name is blank", () => {
+    const res = buildSpawnRequest({ ...base, name: "   " }, null);
+    expect(res).toEqual({ req: { cwd: base.cwd, command: base.command, metadata: {} } });
+  });
+
+  it("attaches a trimmed branch and cleanup flag when worktree is enabled", () => {
+    const res = buildSpawnRequest(
+      { ...base, worktreeEnabled: true, worktreeBranch: " feat/foo ", worktreeCleanup: true },
+      "/home/user/project",
+    );
+    expect(res).toEqual({
+      req: {
+        cwd: base.cwd,
+        command: base.command,
+        metadata: { name: "amber-fox" },
+        worktree: { base_repo: "/home/user/project", branch: "feat/foo", cleanup_on_kill: true },
+      },
+    });
+  });
+
+  it("rejects a missing working directory", () => {
+    expect(buildSpawnRequest({ ...base, cwd: "" }, null)).toHaveProperty("error");
+  });
+
+  it("rejects a missing command", () => {
+    expect(buildSpawnRequest({ ...base, command: "" }, null)).toHaveProperty("error");
+  });
+
+  it("rejects a worktree without an inferred base repo", () => {
+    expect(buildSpawnRequest({ ...base, worktreeEnabled: true, worktreeBranch: "b" }, null))
+      .toHaveProperty("error");
+  });
+
+  it("rejects a worktree without a branch name", () => {
+    expect(buildSpawnRequest({ ...base, worktreeEnabled: true, worktreeBranch: "  " }, "/repo"))
+      .toHaveProperty("error");
+  });
+});