fix: WORKSPSACES section + remaining emoji icons replaced

- base.html: séparateur entre version et Log out, _local_workspaces_for_user
- board.py: _local_workspaces_for_user helper, app_version, fix emoji icons
- dashboard.py: _local_workspaces_for_user helper
- library.html: 📚📁📄🕒⭐👥🌐🔒📦 → SVG + icon map
- workspaces.html: 📁🔍🗑📝 → SVG
- local_workspace.html: page_icon, empty states, icon functions → SVG
- settings.html: 👤🔔 → SVG nav icons
- _icons.html: +'bell' icon
- CSS: .nav-icon-inline, .empty-state-icon
- 143 tests passent

app/templates/_header.html

@@ -67,7 +67,7 @@
                  @mouseleave="dragCloseTimer()">
               <template x-for="h in crumb.hidden" :key="h.id">
                 <div class="fd-nav-item" @click.stop="go(h.url); closeAll()">
-                  <span class="fd-nav-ico" x-text="h.icon || '📄'"></span>
+                  <span class="fd-nav-ico" :title="h.icon || 'file'"></span>
                   <span class="fd-nav-label" x-text="h.label"></span>
                 </div>
               </template>
@@ -110,7 +110,7 @@
                 <div class="fd-nav-item"
                      @mouseenter="openSub(item)"
                      @click.stop="go(item.url); closeAll()">
-                  <span class="fd-nav-ico" x-text="item.icon || '📄'"></span>
+                  <span class="fd-nav-ico" :title="item.icon || 'file'"></span>
                   <span class="fd-nav-label" x-text="item.name"></span>
                   <span class="fd-nav-arrow" x-show="item.has_children">&rsaquo;</span>
                   <div class="fd-nav-menu fd-nav-submenu" x-show="subOpenId === item.id" x-cloak
@@ -118,7 +118,7 @@
                        @mouseleave="dragCloseTimer()">
                     <template x-for="s in subItems" :key="s.id">
                       <div class="fd-nav-item" @click.stop="go(s.url); closeAll()">
-                        <span class="fd-nav-ico" x-text="s.icon || '📄'"></span>
+                        <span class="fd-nav-ico" :title="s.icon || 'file'"></span>
                         <span class="fd-nav-label" x-text="s.name"></span>
                         <span class="fd-nav-arrow" x-show="s.has_children">&rsaquo;</span>
                       </div>