Add Inscriboor download and install flow

index.html

@@ -18,7 +18,7 @@
     <div id="status" role="status" aria-live="polite">Choose Inscriboor or a local test wallet to start your first loop.</div>
     <section class="workspace">
       <article class="panel wallet"><div class="panel-title"><span class="step">01</span><h2>Your test wallet</h2><span id="wallet-state" class="tag">NOT CREATED</span></div>
-        <div id="empty-wallet"><p>One wallet. A whole chain to play with.</p><button id="connect-inscriboor" class="primary">Connect Inscriboor <span>↗</span></button> <button id="create-wallet" class="quiet">Use local test wallet</button><p id="inscriboor-status" class="muted">Looking for the extension…</p></div>
+        <div id="empty-wallet"><p>One wallet. A whole chain to play with.</p><button id="connect-inscriboor" class="primary">Connect Inscriboor <span>↗</span></button> <a class="quiet button-link" href="/downloads/inscriboor-extension-v0.2.zip" download>Get Inscriboor ↓</a> <button id="create-wallet" class="quiet">Use local test wallet</button><p id="inscriboor-status" class="muted">Looking for the extension…</p><details class="install-help"><summary>Install Inscriboor</summary><ol><li>Download and unzip Inscriboor.</li><li>Open <code>chrome://extensions</code> (or Brave extensions).</li><li>Turn on Developer mode.</li><li>Choose <strong>Load unpacked</strong> and select the unzipped <code>extension</code> folder.</li><li>Refresh this page, then click <strong>Connect Inscriboor</strong>.</li></ol></details></div>
         <div id="active-wallet" hidden><p class="label">FAKE BTC BALANCE</p><div class="balance"><span id="balance">0</span><small>BTC</small></div><p id="reserved" class="muted"></p><label for="address">Local regtest-format address</label><input id="address" readonly><button id="export-wallet" class="quiet">↓ Save test wallet</button></div>
         <div class="wallet-footer"><label class="file-button" for="load-wallet">↑ Load test wallet or lab backup</label><input id="load-wallet" type="file" accept=".json,application/json"><p class="muted">Saved on this device. Local-wallet backups contain their test key; Inscriboor backups contain only a public descriptor. A lab backup also preserves the chain.</p></div>
       </article>