fix: workspace name shows even empty, folders vs files, delete button

- dashboard.py _sidebar_data now reads active workspace cookie
- Workspace name always displays (even with 0 pages)
- Folders stored with parent_section='Workspace' (icon 📁)
- Files stored with parent_section='Private' (icon 📄)
- Delete button uses @click directive (not onclick app.)
- workspace_pages loaded in dashboard's _sidebar_data

app/templates/base.html

@@ -95,11 +95,11 @@
       <div class="sidebar-section-items" x-show="sectionsOpen.workspace" x-transition>
         <ul class="sidebar-items" data-section="workspace">
           {% for page in workspace_pages %}
-            <li class="sidebar-item" data-id="{{ page.db_id }}">
-              <span class="page-icon">📄</span>
-              <a href="/pages/{{ page.db_id }}" class="page-name">{{ page.name }}</a>
-              <button class="sidebar-item-delete" onclick="event.preventDefault();app.deleteWorkspacePage({{ page.db_id }})" title="Delete">×</button>
-            </li>
+          <li class="sidebar-item" data-id="{{ page.db_id }}">
+            <span class="page-icon">{{ page.icon or '📄' }}</span>
+            <a href="/pages/{{ page.db_id }}" class="page-name">{{ page.name }}</a>
+            <button class="sidebar-item-delete" @click="deleteWorkspacePage({{ page.db_id }})" title="Delete">×</button>
+          </li>
           {% endfor %}
           {% if not workspace_pages %}
           <li class="sidebar-item empty-hint"><span class="page-icon">📄</span><span class="page-name text-dim">No pages yet</span></li>