feat: add pastable link for markdown endpoint

src/beaver_gateway/frontends/admin/frontend.py

@@ -629,6 +629,11 @@ def _build_endpoint_catalog(
         )
         markdown_row = {
             "url": f"{markdown_base}/chat",
+            # Bare frontend root for the Obsidian companion plugin — its
+            # settings field asks for the base, then appends ``/chat``,
+            # ``/chat/stream`` itself. Curl + admin /chat tester want the
+            # full ``url`` above; the plugin wants this.
+            "base": markdown_base,
             "vault_path": str(markdown_fe.vault_path),
             "default_agent": markdown_fe.default_agent,
             "log_all_chats": markdown_fe.log_all_chats,

src/beaver_gateway/frontends/admin/templates/dashboard.html

@@ -143,6 +143,7 @@
         <tr class="ep-row"
             data-kind="markdown"
             data-url="{{ endpoints.markdown.url }}"
+            data-base="{{ endpoints.markdown.base }}"
             data-sample-agent="{{ endpoints.markdown.sample_agent }}">
           <td>
             <code>{{ endpoints.markdown.vault_path }}</code>
@@ -158,9 +159,15 @@
               <span class="muted">— (request must set <code>agent</code> or frontmatter)</span>
             {% endif %}
           </td>
-          <td><code class="ep-url">{{ endpoints.markdown.url }}</code></td>
+          <td>
+            <code class="ep-url">{{ endpoints.markdown.url }}</code>
+            <div class="muted" style="font-size:0.85em; margin-top:0.25rem;">
+              plugin base: <code>{{ endpoints.markdown.base }}</code>
+            </div>
+          </td>
           <td class="ep-actions">
             <button type="button" data-action="copy-url">Copy URL</button>
+            <button type="button" data-action="copy-base">Copy plugin base</button>
             <button type="button" data-action="copy-curl">Copy curl</button>
             <button type="button" data-action="toggle-curl" aria-expanded="false">▸ curl</button>
           </td>
@@ -452,6 +459,9 @@
     const tok = currentToken() || PLACEHOLDER;
     if (action === "copy-url") {
       copyText(btn, url);
+    } else if (action === "copy-base") {
+      const base = row.getAttribute("data-base");
+      if (base) copyText(btn, base);
     } else if (action === "copy-url-token") {
       const sep = url.indexOf("?") >= 0 ? "&" : "?";
       copyText(btn, url + sep + "token=" + encodeURIComponent(tok));