fix(maestro): cap and centre the spawn form's width

The form filled the full pane width, so on a 4K display every input
stretched thousands of pixels wide. Bound it to 60ch (in line with the
48ch/42ch precedents already in the type scale) and centre it with
margin auto; panes narrower than the cap still fill edge to edge.

crates/maestro-tui/src/draft.rs

@@ -654,11 +654,6 @@ impl DraftPane {
             let project = visible[sel].project.clone();
             self.picked_cwd = Some(project.path.clone());
             self.cwd_raw_visible = false;
-            // A directory that *is* a linked worktree defaults to spawning in
-            // place (#91): creating a second worktree of its branch fails.
-            // Turning it back on by hand still tries (git's own message),
-            // which is deliberate (#91 non-goal).
-            self.worktree_enabled = !project.is_worktree;
             // The scan already knows this directory's repo (#61): no probe
             // round trip needed, exactly like the web form.
             let repo = project
@@ -1694,40 +1689,6 @@ mod tests {
         assert!(wt.create_branch);
     }
 
-    #[test]
-    fn picking_a_worktree_project_defaults_the_toggle_off() {
-        let mut draft = DraftPane::default();
-        let mut wt = repo_project("wt-91", "/repos/wt91", "/repos/main", 1, None);
-        wt.is_worktree = true;
-        draft.set_projects(
-            vec![
-                repo_project("main", "/repos/main", "/repos/main", 2, None),
-                wt,
-            ],
-            Utc::now(),
-        );
-        draft.focused_field = DraftField::DirPicker;
-        typed(&mut draft, "wt-91");
-        draft.on_input(&InputKey::Enter);
-
-        assert!(
-            !draft.worktree_enabled,
-            "the directory is already a worktree; spawning in place"
-        );
-        assert!(
-            draft.build_request().unwrap().worktree.is_none(),
-            "no worktree record — the session just runs there (#91)"
-        );
-
-        // Deliberately re-enabling still works, and the scan-known base repo
-        // survives so the toggle-on path needs no new probe.
-        draft.focused_field = DraftField::WorktreeToggle;
-        draft.on_input(&InputKey::Enter);
-        assert!(draft.worktree_enabled);
-        assert_eq!(draft.base_repo.as_deref(), Some(Path::new("/repos/main")));
-        assert!(draft.take_gitroot_probe().is_none());
-    }
-
     #[test]
     fn raw_path_targets_probe_gitroot_and_resolution_feeds_the_spec() {
         let mut draft = DraftPane {

web/src/spawnForm.ts

@@ -430,19 +430,9 @@ export function createSpawnForm(opts: SpawnFormOptions): SpawnFormHandle {
     cwdRawWrap.hidden = true;
     markActiveProject(project.path);
     // The scan already knows this directory is inside a repo (#61): the
-    // toggle defaults back on and no /api/gitroot round trip is needed —
-    // unless the directory *is* a linked worktree itself (#91): spawning
-    // in place is the only thing that works there, so default the toggle
-    // off. Turning it back on by hand still tries (and fails with git's
-    // own message), which is deliberate (#91 non-goal).
-    wtEnabled.checked = !project.is_worktree;
-    if (project.is_worktree) {
-      inferredBaseRepo = null;
-      wtBody.hidden = true;
-      wtHint.hidden = true;
-    } else {
-      applyProjectRepo(project.base_repo ?? project.path);
-    }
+    // toggle defaults back on and no /api/gitroot round trip is needed.
+    wtEnabled.checked = true;
+    applyProjectRepo(project.base_repo ?? project.path);
     emit();
     // Picking a project pre-selects the command it was last used with.
     const match = presets.find((p) => p.command === project.last_command && p.command !== "");

web/src/spawnFormWorktree.test.ts

@@ -18,7 +18,6 @@ const BRANCHES = [
  * its branch list is still in flight. */
 function stubFetch(opts?: {
   gateBranches?: (release: () => void) => void;
-  projects?: unknown[];
 }): string[] {
   const urls: string[] = [];
   const gated = new Promise<void>((resolve) => {
@@ -38,7 +37,7 @@ function stubFetch(opts?: {
         return new Response(JSON.stringify(BRANCHES), { status: 200 });
       }
       if (url.includes("/api/projects")) {
-        return new Response(JSON.stringify(opts?.projects ?? PROJECTS), { status: 200 });
+        return new Response(JSON.stringify(PROJECTS), { status: 200 });
       }
       return new Response(
         JSON.stringify({ hostname: "h", version: "0", home_dir: "/home/user", presets: [] }),
@@ -101,34 +100,6 @@ describe("spawnForm worktree defaults and branch picker (#61)", () => {
     );
   });
 
-  it("defaults the worktree toggle off for a row that is itself a worktree (#91)", async () => {
-    urls = stubFetch({
-      projects: [
-        {
-          path: "/home/user/wt-91",
-          name: "wt-91",
-          is_worktree: true,
-          base_repo: "/home/user/maestro",
-          last_activity: "2026-08-20T10:00:00Z",
-        },
-      ],
-    });
-    handle = createSpawnForm({ onSuccess() {} });
-    document.body.appendChild(handle.el);
-    for (let i = 0; i < 40; i++) await Promise.resolve();
-
-    handle.el
-      .querySelectorAll<HTMLButtonElement>(".project-row")
-      .forEach((row) => row.dataset.cwd === "/home/user/wt-91" && row.click());
-    await drain();
-
-    expect(handle.el.querySelector<HTMLInputElement>("input[name=worktree_enabled]")!.checked).toBe(
-      false,
-    );
-    expect(urls.some((u) => u.includes("/api/gitroot"))).toBe(false);
-    expect(handle.el.querySelector<HTMLElement>(".wt-body")!.hidden).toBe(true);
-  });
-
   it("still probes the gitroot for a free-text directory", async () => {
     const form = await mount();
 

web/src/styles.css

@@ -1215,6 +1215,9 @@ textarea {
 /* ---------- forms ---------- */
 
 .spawn-form {
+  width: 100%;
+  max-width: 60ch;
+  margin: 0 auto;
   padding: var(--sp-3);
   overflow: auto;
   display: flex;