Make the selected-card dashed outline thicker so the ants box reads more clearly in the create flow.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/unit/Selection.test.jsx

@@ -38,6 +38,8 @@ describe("Selection Component", () => {
     expect(screen.getByText("SELECTED")).toBeInTheDocument();
     const card = screen.getByRole("button");
     expect(card).toHaveClass("outline-dashed");
+    expect(card).toHaveClass("outline-4");
+    expect(card).toHaveClass("outline-offset-[-4px]");
   });
 
   it("applies horizontal layout by default", () => {