diff --git a/app/templates/_header.html b/app/templates/_header.html
index 8910a5d..83bbac8 100644
--- a/app/templates/_header.html
+++ b/app/templates/_header.html
@@ -90,10 +90,10 @@
 <aside class="sidebar" id="sidebar" aria-label="Navigation principale">
     <div class="side-head">
         <a href="/" class="side-logo" aria-label="Kanbante — accueil">
-            <span class="logo-mark">📋</span>
+            <span class="logo-mark"><svg viewBox="0 0 24 24" fill="#fff" aria-hidden="true"><rect x="3" y="4" width="5" height="16" rx="1"/><rect x="9.5" y="4" width="5" height="10" rx="1"/><rect x="16" y="4" width="5" height="13" rx="1"/></svg></span>
             <span class="side-label gradient-text">Kanbante</span>
         </a>
-        <button type="button" class="side-search palette-trigger" title="Recherche & commandes (Ctrl+K)" aria-label="Recherche et commandes (Ctrl+K)">🔍</button>
+        <button type="button" class="side-search palette-trigger" title="Recherche & commandes (Ctrl+K)" aria-label="Recherche et commandes (Ctrl+K)"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" aria-hidden="true"><circle cx="11" cy="11" r="7"/><path d="M20 20l-4-4"/></svg></button>
         <button type="button" class="side-collapse" id="side-collapse" title="Replier ou déplier le menu" aria-label="Replier ou déplier le menu"><span class="side-collapse-ico">«</span></button>
     </div>
     {% if current_workspace and user_workspaces and user_workspaces|length > 1 %}
@@ -107,6 +107,9 @@
         </select>
     </form>
     {% endif %}
+    {# Icônes de navigation (#54) : SVG fins en trait, style rail
+       Spark — monochromes (currentColor), pas d'emoji. #}
+    {% macro nav_icon(key) %}<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">{% if key == 'home' %}<path d="M3 11l9-8 9 8"/><path d="M5 10v11h14V10"/><path d="M10 21v-6h4v6"/>{% elif key == 'focus' %}<circle cx="12" cy="12" r="9"/><circle cx="12" cy="12" r="5"/><circle cx="12" cy="12" r="1" fill="currentColor"/>{% elif key == 'today' %}<path d="M7 18a5 5 0 0 1 10 0"/><path d="M3 18h18"/><path d="M12 9V6"/><path d="M5.5 11l1.5 1.5"/><path d="M18.5 11l-1.5 1.5"/>{% elif key == 'my' %}<circle cx="12" cy="8" r="3.5"/><path d="M4 20c0-3.5 3.5-5.5 8-5.5s8 2 8 5.5"/>{% elif key == 'briefing' %}<path d="M4 20V11"/><path d="M10 20V4"/><path d="M16 20v-8"/><path d="M3 20h18"/>{% elif key == 'standup' %}<path d="M4 5h16v11h-7l-4 4v-4H4z"/>{% elif key == 'digest' %}<path d="M6 3h12v18H6z"/><path d="M9 8h6"/><path d="M9 12h6"/><path d="M9 16h4"/>{% elif key == 'inflight' %}<path d="M3 12l19-9-7 18-4-6z"/><path d="M11 15L22 3"/>{% elif key == 'forecast' %}<path d="M3 18l5-6 4 3 9-9"/><path d="M16 6h5v5"/>{% elif key == 'health' %}<path d="M12 20C7 16 3 13 3 9a4.5 4.5 0 0 1 8-2.5A4.5 4.5 0 0 1 21 9c0 4-4 7-9 11z"/>{% elif key == 'rules' %}<path d="M6 3h12v18H6z"/><path d="M9 12l2 2 4-4"/>{% elif key == 'activity' %}<path d="M4 4h16v16H4z"/><path d="M7 8h10"/><path d="M7 12h10"/><path d="M7 16h6"/>{% elif key == 'search' %}<circle cx="11" cy="11" r="7"/><path d="M20 20l-4-4"/>{% elif key == 'capture' %}<path d="M13 2L4 14h6l-1 8 10-13h-6z"/>{% elif key == 'archives' %}<path d="M3 8h18"/><path d="M5 8v12h14V8"/><path d="M9 8v5h6V8"/>{% elif key == 'wall' %}<path d="M3 5h18v11H3z"/><path d="M9 21h6"/><path d="M12 16v5"/>{% elif key == 'admin' %}<path d="M4 4h7v7H4z"/><path d="M13 4h7v7h-7z"/><path d="M4 13h7v7H4z"/><path d="M13 13h7v7h-7z"/>{% elif key == 'admin_connections' %}<path d="M9 3v5"/><path d="M15 3v5"/><path d="M7 8h10v5a5 5 0 0 1-10 0z"/><path d="M12 18v3"/>{% elif key == 'admin_workspaces' %}<circle cx="12" cy="12" r="9"/><path d="M15 9l-2 4-4 2 2-4z"/>{% elif key == 'admin_columns' %}<path d="M4 4h4v16H4z"/><path d="M10 4h4v16h-4z"/><path d="M16 4h4v16h-4z"/>{% elif key == 'admin_settings' %}<circle cx="12" cy="12" r="3"/><path d="M12 2v3"/><path d="M12 19v3"/><path d="M2 12h3"/><path d="M19 12h3"/><path d="M4.5 4.5l2 2"/><path d="M17.5 17.5l2 2"/><path d="M19.5 4.5l-2 2"/><path d="M6.5 17.5l-2 2"/>{% else %}<circle cx="12" cy="12" r="9"/>{% endif %}</svg>{% endmacro %}
     <nav class="side-nav">
         {% for gkey, group, links in nav_groups %}
         <div class="side-section" data-group="{{ gkey }}">
@@ -118,10 +121,16 @@
                 <div class="side-acc-inner">
                     {% for key, href, icon, label in links %}
                     <a href="{{ href }}" class="side-link{% if active_nav == key %} active{% endif %}" title="{{ label }}">
-                        <span class="side-ico">{{ icon }}</span>
+                        <span class="side-ico">{{ nav_icon(key) }}</span>
                         <span class="side-label">{{ label }}</span>
                     </a>
                     {% endfor %}
+                    {% if gkey == 'admin' %}
+                    <button type="button" class="side-link theme-toggle-link" id="theme-toggle" title="Basculer entre thème sombre et clair" aria-label="Basculer entre thème sombre et clair">
+                        <span class="side-ico" data-theme-ico>☀️</span>
+                        <span class="side-label" data-theme-label>Mode clair</span>
+                    </button>
+                    {% endif %}
                 </div>
             </div>
         </div>
@@ -135,6 +144,9 @@
         <a href="/profile" class="side-logout" title="Mon profil">👤<span class="side-label"> {{ current_user.display_name or current_user.username }}</span></a>
         {% endif %}
         <span class="side-version side-label">v{{ version }}</span>
+        {% if not is_admin %}
+        <button type="button" class="theme-toggle-foot" id="theme-toggle" title="Basculer entre thème sombre et clair" aria-label="Basculer entre thème sombre et clair"><span data-theme-ico>☀️</span></button>
+        {% endif %}
         {% if auth_enabled %}
         <a href="/logout" class="side-logout" title="Se déconnecter">⏻<span class="side-label"> Sortir</span></a>
         {% endif %}
@@ -153,7 +165,6 @@
         <a href="{{ repo_info.html_url }}" target="_blank" rel="noopener" class="nav-pill" title="Ouvrir ce dépôt dans Gitea">🔗 Gitea ↗</a>
         {% endif %}
         <button type="button" class="nav-pill palette-trigger topbar-search" title="Recherche et commandes (Ctrl+K)">🔍</button>
-        <button type="button" class="nav-pill" id="theme-toggle" title="Basculer entre thème sombre et clair" aria-label="Basculer entre thème sombre et clair">☀️ Mode clair</button>
     </div>
     <script src="/static/js/nav.js?v={{ version }}" defer></script>
 </header>