Fix header funds flicker and unify settings page top bar.

Preserve SSR fund values when account_snapshot returns null, retry on failure, and show the same instance header panel on system settings.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/instance/templates/embed_shell.html

@@ -43,9 +43,7 @@
     </nav>
     <div id="embed-flash" class="flash" style="display:none" role="status"></div>
 
-    {% if initial_tab != 'settings' %}
     {% include 'instance_header_panel.html' %}
-    {% endif %}
     {% if initial_tab != 'settings' and include_transfer_block %}
     {% include 'instance_top_bar.html' %}
     {% endif %}
@@ -91,6 +89,6 @@ const ORDER_ENTRY_MODEL_CODE_TO_CATEGORY = {{ entry_model_code_to_category | toj
 <script src="/static/key_monitor_form.js?v=2"></script>
 {% include 'embed_boot_scripts.html' %}
 <script src="/static/instance_live.js?v=3"></script>
-<script src="/static/instance_embed.js?v=13"></script>
+<script src="/static/instance_embed.js?v=15"></script>
 </body>
 </html>