fix(articles): add /quote CTA + planner links in cost and risk articles

- padel-halle-kosten-de, padel-hall-cost-guide-en: link planner ref,
  append quote CTA "Zahlen prüfen — Angebote einholen"
- padel-halle-risiken-de, padel-hall-investment-risks-en: link planner
  in sensitivity tab mention, append quote CTA on risk management

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

data/content/articles/padel-hall-investment-risks-en.md

@@ -192,6 +192,12 @@ The investors who succeed long-term in padel aren't the ones who found a risk-fr
 
 ## Model the Downside with Padelnomics
 
-The Padelnomics investment planner includes a sensitivity analysis tab designed for exactly this kind of scenario work: how does ROI change at 40% vs 65% utilization? What does a six-month construction delay cost in total? What happens to the model when a competitor opens in year three and takes 20% of demand?
+The [Padelnomics investment planner](/en/planner) includes a sensitivity analysis tab designed for exactly this kind of scenario work: how does ROI change at 40% vs 65% utilization? What does a six-month construction delay cost in total? What happens to the model when a competitor opens in year three and takes 20% of demand?
 
 Good decisions need an honest model — not just the best-case assumptions.
+
+<div style="background:#EFF6FF;border:1px solid #BFDBFE;border-radius:12px;padding:1.5rem 2rem;margin:2rem 0;">
+  <p style="margin:0 0 0.5rem;font-weight:600;color:#0F172A;font-size:1.0625rem;">Start with the right partners</p>
+  <p style="margin:0 0 1rem;color:#334155;font-size:0.9375rem;">Most of the risks in this article are manageable with the right advisors, builders, and specialists on board from day one. Describe your project — we'll connect you with vetted partners who specialize in padel facilities. Free and non-binding.</p>
+  <a href="/quote" class="btn">Request a Quote</a>
+</div>