website: add faq

web/src/routes/_marketing/index.tsx

@@ -37,7 +37,7 @@ function Home() {
           "Backlink Analysis",
           "Competitor Insights",
           "Rank Tracking",
-          "AI Visibility (Coming soon)",
+          "AI Visibility",
         ].map((item) => (
           <li key={item} className="flex gap-2.5 text-sm text-neutral-800">
             <span className="text-neutral-500 mt-[2px]">&mdash;</span>

web/src/routes/_marketing/pricing.tsx

@@ -116,8 +116,16 @@ function Pricing() {
         <dl className="mt-4 space-y-6">
           <div>
             <dt className="text-sm font-medium">
-              What features use credits vs. what's unlimited?
+              What if I use all my included credits?
             </dt>
+            <dd className="mt-1 text-sm text-neutral-600 leading-relaxed">
+              You'll never have unexpected costs or bills. If you use all your
+              credits, you'll see errors when you try to do tasks. You can
+              purchase more top up credits at any time.
+            </dd>
+          </div>
+          <div>
+            <dt className="text-sm font-medium">What features use credits?</dt>
             <dd className="mt-1 text-sm text-neutral-600 leading-relaxed">
               Credits are consumed by features that query DataForSEO's API —
               backlinks, keyword volume, competitor data, and site audits. Your