fix: show auto-created workspace name instead of 'Private' in sidebar

For Gitea workspaces, the sidebar section now displays the actual
workspace name (e.g. '📁 Projets/Ares') instead of the generic '📁 Private'.
The workspace name is auto-created from the Gitea project's owner/repo
when the remote workspace is first opened.

app/templates/base.html

@@ -121,7 +121,7 @@
       <div class="sidebar-section-header" @click="toggleSection('workspace')">
         <div class="sidebar-section-title">
           <span class="chevron" :class="{ open: sectionsOpen.workspace }" x-text="sectionsOpen.workspace ? '▼' : '▶'"></span>
-          <span>{% if gitea_workspace %}📁 Private{% elif workspace_key and '/' in workspace_key %}🔗{% else %}📁{% endif %} {{ active_ws_name if not gitea_workspace else '' }}</span>
+          <span>{% if gitea_workspace %}📁 {{ active_ws_name }}{% elif workspace_key and '/' in workspace_key %}🔗{% else %}📁{% endif %} {{ active_ws_name if not gitea_workspace else '' }}</span>
         </div>
         <div class="sidebar-section-actions">
           <button class="section-action-btn" title="New Page" @click.stop="newPageInWorkspace()">📄</button>