fix: 🏠 à gauche des flèches ← → dans breadcrumb, topbar nettoyée

- Bouton All workspaces (🏠) déplacé du topbar-right vers le breadcrumb row,
  positionné AVANT les flèches ← → de navigation
- Retiré 📁 icône + nom workspace du topbar (redondant avec le breadcrumb)
- Topbar allégée: hamburger menu + breadcrumb serveur uniquement

app/templates/local_workspace.html

@@ -8,9 +8,6 @@
     <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><line x1="3" y1="6" x2="21" y2="6"/><line x1="3" y1="12" x2="21" y2="12"/><line x1="3" y1="18" x2="21" y2="18"/></svg>
   </button>
   <div class="topbar-left">
-    <span class="breadcrumb" style="display:flex;align-items:center;gap:4px;color:rgba(255,255,255,.5);font-size:13px;">
-      <a href="/local-workspace" style="color:rgba(255,255,255,.5);text-decoration:none;">📁 {{ workspace_name }}</a>
-    </span>
     <span class="page-title-topbar">
       {% if breadcrumb %}
         {% for b in breadcrumb %}
@@ -19,9 +16,6 @@
       {% endif %}
     </span>
   </div>
-  <div class="topbar-right">
-    <a href="/workspaces" class="page-action-btn" title="All workspaces">🏠</a>
-  </div>
 </header>
 {% endblock %}
 
@@ -377,6 +371,7 @@
 
   <!-- Breadcrumb row -->
   <div class="breadcrumb-row">
+    <a href="/workspaces" class="btn-icon nav-arrow" title="All workspaces">🏠</a>
     <button class="btn-icon nav-arrow" @click="goBack()" title="Back" :disabled="!canGoBack">←</button>
     <button class="btn-icon nav-arrow" @click="goForward()" title="Forward" :disabled="!canGoForward">→</button>
     <div class="unified-breadcrumb">