Feat: Add GoatCounter analytics, Terms & Privacy pages, prompt copy button

- Update AI system prompt example (README + index)
- Add copy button for the prompt on the index page
- Add GoatCounter to homepage; report image hits server-side via
  waitUntil (optional GOATCOUNTER_URL/GOATCOUNTER_TOKEN)
- Add TERMS.md and PRIVACY.md, linked in the index footer
- Remove dead c.planetrenox.com tracker

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

index.html

@@ -5,7 +5,8 @@
     <title>direct-img.link | Live images in markdown</title>
     <meta name="description" content="Embed live images in markdown powered by search. No APIs, no tokens, just search.">
     <link rel="icon" href="/assets/favicon.ico" sizes="16x16 32x32 48x48"><link rel="icon" href="/assets/logo.svg" type="image/svg+xml">
-    <script defer src="https://c.planetrenox.com/tracker.js"></script>
+    <script data-goatcounter="https://direct-img.goatcounter.com/count"
+            async src="//gc.zgo.at/count.js"></script>
     <style>
         :root{--bg:#fff;--text:#1a1a1a;--text-muted:#666;--accent:#0070f3;--warning:#eb5757;--code-bg:#f5f5f5;--border:#eaeaea;--radius:8px;}
         *{box-sizing:border-box;}
@@ -21,6 +22,10 @@
         section{margin-bottom:48px;}
         h2{font-size:1.5rem;font-weight:700;margin-bottom:16px;border-bottom:1px solid var(--border);padding-bottom:8px;}
         pre{background:var(--code-bg);padding:16px;border-radius:var(--radius);overflow-x:auto;font-size:0.9rem;border:1px solid var(--border);}
+        .copy-wrap{position:relative;}
+        .copy-wrap pre{white-space:pre-wrap;padding-right:72px;}
+        .copy{position:absolute;top:8px;right:8px;font:inherit;font-size:0.75rem;font-weight:600;padding:4px 10px;border:1px solid var(--border);border-radius:6px;background:var(--bg);color:var(--text-muted);cursor:pointer;}
+        .copy:hover{color:var(--accent);border-color:var(--accent);}
         code{font-family:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;}
         table{width:100%;border-collapse:collapse;margin:16px 0;font-size:0.9rem;}
         th,td{text-align:left;padding:12px;border-bottom:1px solid var(--border);}
@@ -50,10 +55,13 @@
         <section>
             <h2>For AI System Prompts</h2>
             <p>Add this to your system instructions:</p>
-            <pre><code>When writing markdown, embed relevant images using direct-img.link — a free image search proxy that returns images directly from a URL. But keep it entertaining, for example use it to show reaction faces, anime girl, or fun, not technical.
+            <div class="copy-wrap">
+                <button class="copy" onclick="copyPrompt(this)">Copy</button>
+                <pre><code id="prompt">When writing markdown, embed relevant images/gifs using direct-img.link — a free image search proxy that returns images directly from a URL. But keep it entertaining, for example use it to show reaction faces, girl, or fun, not technical.
 Example structure:
-![Happy Girl](https://direct-img.link/happy+girl)
+![Cat Gif](https://direct-img.link/cat+gif)
 Use images to complement your responses, powered by Brave.</code></pre>
+            </div>
         </section>
 
         <section>
@@ -87,7 +95,16 @@ Use images to complement your responses, powered by Brave.</code></pre>
 
     <footer>
         <div>Built for the AI era.</div>
-        <div><a href="https://github.com/direct-img/direct-img.link">GitHub</a></div>
+        <div><a href="https://github.com/direct-img/direct-img.link/blob/main/TERMS.md">Terms</a> · <a href="https://github.com/direct-img/direct-img.link/blob/main/PRIVACY.md">Privacy</a> · <a href="https://github.com/direct-img/direct-img.link">GitHub</a></div>
     </footer>
+    <script>
+        const copyPrompt=b=>{
+            const p=document.getElementById('prompt');
+            (navigator.clipboard?.writeText(p.textContent)??Promise.reject()).then(()=>{
+                b.textContent='Copied!';
+                setTimeout(()=>b.textContent='Copy',1500);
+            },()=>getSelection().selectAllChildren(p));
+        };
+    </script>
 </body>
 </html>