docs: show the full dashboard in a MacBook Air frame

Built a simple CSS laptop-bezel mockup (lid, camera dot, hinge, base with the
trackpad-notch) and rendered the existing full dashboard.png (all 5 tiles + the
complete request table) inside its screen. Replaces the flat dashboard
screenshot in the guide's Dashboard section with this framed version — reads
better as a hero image and makes clear it's a real desktop-web app. Verified it
scales down cleanly within the content column at normal viewport widths.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: garthvh

docs/guide.html

@@ -359,7 +359,7 @@ <h2>Dashboard</h2>
       the model the client actually asked for. Below that, a paged table of up to
       ~2000 recent requests:</p>
       <figure>
-        <img src="screenshots/dashboard.png" alt="The FauxClaude live dashboard: stat tiles for requests, tokens, and savings, plus a table of recent requests with their routing, timing, and last message">
+        <img src="screenshots/dashboard-macbook.png" alt="The FauxClaude live dashboard on a laptop screen: stat tiles for requests, tokens, and savings, plus a full table of recent requests with their routing, timing, and last message">
         <figcaption>Live traffic against qwen3-vl:30b-a3b-instruct, routed per Claude tier.</figcaption>
       </figure>
       <ul>