feat: production-readiness pass

- Migrate login page to atelier design system (editorial modal style)
- Polish root error.tsx, not-found.tsx, loading.tsx with atelier design
- Add JSON-LD structured data: SoftwareApplication + LocalBusiness
- Fix next.config.ts outputFileTracingRoot absolute path warning
- Add force-dynamic to protected-example (uses cookies)
- Add proper type for stops page (replace : any)
- Fix unescaped quotes in StopTableClient
- Fix no-explicit-any in db-schema route
- Clean up console.logs in admin-permissions
- Fix inline any in admin/stops page
- Update OG image references to existing og-default.svg

src/app/api/health/db-schema/route.ts

@@ -19,11 +19,12 @@ export async function GET() {
       { status: "ok", message: "admin_users table present" },
       { status: 200 }
     );
-  } catch (err: any) {
+  } catch (err: unknown) {
+    const message = err instanceof Error ? err.message : "Database schema check failed";
     return NextResponse.json(
       {
         status: "error",
-        message: err?.message ?? "Database schema check failed",
+        message,
         hint: "Run migrations against the DATABASE_URL (see docs/superpowers/plans/2026-06-prod-db-schema-migration-reliability.md)",
       },
       { status: 503 }