feat(lanes): surface child worktrees on a lane card + detect Superpowers skills

Adopting the main repo as its own lane now gets stage detection
(cwd matches, same as any other lane), and its card lists every
managed-worktree lane provisioned from it with a jump-to link.
Also add the two missing Skill-tool detect rules (implement, ship)
so detection covers all four Superpowers workflow phases, not just
plan/review.

client/src/components/lanes/LaneCard.tsx

@@ -180,9 +180,17 @@ function since(sec: number | null): string {
 export default function LaneCard({
   lane,
   onAction,
+  childWorktrees,
+  onSelectLane,
 }: {
   lane: Lane;
   onAction: (action: string, body?: Record<string, unknown>) => void;
+  /** Other lanes whose `source_repo` is this lane's `cwd` — populated only
+   *  when this lane is itself a source repo (typically an adopted one) that
+   *  other lanes were provisioned as worktrees from. */
+  childWorktrees?: Lane[];
+  /** Jumps the Workspace page's selection to another lane's card. */
+  onSelectLane?: (id: number) => void;
 }) {
   const { t } = useTranslation(["lanes"]);
   const [destructiveAction, setDestructiveAction] = useState<"reset" | "remove" | "purge" | null>(
@@ -452,6 +460,31 @@ export default function LaneCard({
           </div>
         </dl>
 
+        {childWorktrees && childWorktrees.length > 0 && (
+          <div
+            data-testid="lane-child-worktrees"
+            className="mb-3 space-y-1 text-[11px] text-fg-secondary"
+          >
+            <div className="text-fg-muted">
+              {t("worktrees.heading", { count: childWorktrees.length })}
+            </div>
+            <ul className="space-y-0.5">
+              {childWorktrees.map((w) => (
+                <li key={w.id}>
+                  <button
+                    type="button"
+                    onClick={() => onSelectLane?.(w.id)}
+                    className="truncate text-left text-blue-400 hover:underline"
+                    title={w.cwd}
+                  >
+                    #{w.id} {w.title || w.cwd} · {w.status}
+                  </button>
+                </li>
+              ))}
+            </ul>
+          </div>
+        )}
+
         {integrations && (
           <div className="mb-2 flex items-center gap-1.5 text-[10px]">
             {(["tracker", "dev_qc", "ci_wait"] as const).map((name) => (