feat(maestro): open the spawn form on the project picker

The picker now leads the form in both clients and takes focus on open, so
Tab walks from it into the command tiles. Opening the form also preselects
the project of the session you were last on — a worktree session seeds its
base repository — so 'n' then Enter spawns another session there.

web/src/spawnModal.test.ts

@@ -52,6 +52,16 @@ describe("spawn modal", () => {
     expect(host.querySelector(".form-actions .cancel")).toBeTruthy();
   });
 
+  it("opens with the project filter focused, ahead of the command tiles", async () => {
+    openSpawnModal({ onSuccess: () => {} });
+    await flush();
+
+    const form = modal()!.querySelector("form.spawn-form")!;
+    expect(document.activeElement).toBe(form.querySelector(".project-filter"));
+    const fields = [...form.querySelectorAll(".field .field-label")].map((el) => el.textContent);
+    expect(fields.slice(0, 2)).toEqual(["Project", "Command"]);
+  });
+
   it("titles a seeded open as a clone", async () => {
     openSpawnModal({ seed: { command: "claude" }, onSuccess: () => {} });
     await flush();