Hide AI recommendation from results view; keep DB capture

AI text is still generated and saved to calc_submissions for internal
follow-up, but no longer displayed to the user — keeps the detailed
analysis behind the product sign-up wall.

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

app.js

@@ -129,9 +129,9 @@
       ai += `This would represent entirely new interest income for your community at no additional risk.`;
     }
 
-    // ── AI recommendation — call server; fall back to client-side text ──
+    // ── AI recommendation — call server to generate & save to DB (not displayed) ──
     try {
-      const aiRes = await fetch('/api/calculate', {
+      await fetch('/api/calculate', {
         method:  'POST',
         headers: { 'Content-Type': 'application/json' },
         body:    JSON.stringify({
@@ -140,15 +140,7 @@
           totalPotential, opInterest, resInterest,
         }),
       });
-      if (aiRes.ok) {
-        const { recommendation } = await aiRes.json();
-        document.getElementById('calcAiText').textContent = recommendation;
-      } else {
-        document.getElementById('calcAiText').textContent = ai;
-      }
-    } catch (_) {
-      document.getElementById('calcAiText').textContent = ai;
-    }
+    } catch (_) { /* best-effort — DB save failed silently */ }
 
     // ── Animate the main number ──
     animateValue(document.getElementById('resultAmount'), 0, totalPotential);