fix(maestro): spawn similar preselects the cloned project

Spawn similar dropped the session's cwd into the free-text directory hatch,
so the project picker showed nothing selected. For a worktree session that
cwd was the daemon-made checkout, and the worktree toggle defaulted on, so
the clone asked for a worktree of a worktree.

It now seeds the picker: the cloned project's box selected, the same
worktree decision, base repo plus '+ new' when the source had a worktree.
A seeded path that matches no project falls back to the raw input showing
that path instead of an empty picker.

web/src/worktreeStep.test.ts

@@ -240,4 +240,35 @@ describe("spawnForm worktree step (#95)", () => {
     expect(box(form, MAESTRO.path).classList.contains("is-active")).toBe(true);
     expect(toggle(form).checked).toBe(false);
   });
+
+  it("lands a 'spawn similar' seed on the cloned project with '+ new' active", async () => {
+    urls = stubFetch([MAESTRO, WT_A, WT_B]);
+    handle = createSpawnForm({
+      onSuccess() {},
+      seed: { cwd: MAESTRO.path, cwdRawVisible: false, worktreeEnabled: true },
+    });
+    document.body.appendChild(handle.el);
+    await drain();
+    const form = handle.el;
+
+    expect(box(form, MAESTRO.path).classList.contains("is-active")).toBe(true);
+    expect(activeChoice(form)!.dataset.kind).toBe("new");
+    expect(toggle(form).checked).toBe(true);
+    expect(form.querySelector<HTMLElement>(".cwd-raw-wrap")!.hidden).toBe(true);
+  });
+
+  it("falls back to the raw input when the seeded directory matches no project", async () => {
+    urls = stubFetch([MAESTRO, WT_A]);
+    handle = createSpawnForm({
+      onSuccess() {},
+      seed: { cwd: "/home/user/gone", cwdRawVisible: false, worktreeEnabled: false },
+    });
+    document.body.appendChild(handle.el);
+    await drain();
+    const form = handle.el;
+
+    const raw = form.querySelector<HTMLInputElement>(".cwd-raw")!;
+    expect(form.querySelector<HTMLElement>(".cwd-raw-wrap")!.hidden).toBe(false);
+    expect(raw.value).toBe("/home/user/gone");
+  });
 });