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.ts

@@ -59,6 +59,9 @@ export function openSpawnModal(opts: SpawnModalOptions): void {
     },
   });
   dialog.appendChild(form.el);
+  // The project filter owns the keyboard on open: typing narrows the list and
+  // Tab from here reaches the command tiles, matching the TUI's draft pane.
+  form.el.querySelector<HTMLInputElement>(".project-filter")?.focus();
 
   function close(): void {
     if (closeCurrent === close) closeCurrent = null;