test(ui): add AGPL-3.0 badge to footer to validate visual-capture pipeline

Deliberate small, real, visible test change -- not a feature PR. Used to
confirm the newly-activated before/after screenshot capture pipeline
renders correctly end-to-end on a real gittensory-ui PR (production
before-shot vs. this PR's preview-deploy after-shot).

Author: JSONbored

apps/gittensory-ui/src/components/site/site-footer.tsx

@@ -1,6 +1,8 @@
 import { Link } from "@tanstack/react-router";
 import { Github } from "lucide-react";
 
+import { Badge } from "@/components/ui/badge";
+
 import { GittensoryMark } from "./mark";
 import { HealthDot } from "./health-dot";
 
@@ -122,6 +124,9 @@ export function SiteFooter() {
               </a>{" "}
               OSS project.
             </span>
+            <Badge variant="outline" className="border-hairline text-muted-foreground">
+              AGPL-3.0
+            </Badge>
           </div>
         </div>
       </div>