diff --git a/lightsync/frontend/index.html b/lightsync/frontend/index.html
index a119028..b3ea4fb 100644
--- a/lightsync/frontend/index.html
+++ b/lightsync/frontend/index.html
@@ -20,8 +20,8 @@
         </header>
 
         <aside class="sidebar">
-            <div class="panel" id="devices-panel" style="flex: 1; min-height: 0;">
-                <div class="panel-header">DEVICES <button class="panel-manage-btn" id="devices-manage-toggle" title="Manage devices">⚙ MANAGE</button></div>
+            <div class="panel" id="devices-panel" style="flex: 0 0 auto;">
+                <div class="panel-header">DEVICES <button type="button" class="panel-manage-btn" id="devices-manage-toggle" title="Manage devices">⚙ MANAGE</button></div>
                 <div class="panel-content" id="device-list">
                     <span class="text-dim">loading...</span>
                 </div>
@@ -38,7 +38,7 @@
                     <button type="submit">+ ADD DEVICE</button>
                 </form>
             </div>
-            <div class="panel" id="animations-panel" style="flex: 0 0 120px;">
+            <div class="panel" id="animations-panel" style="flex: 1; min-height: 0;">
                 <div class="panel-header">ANIMATIONS</div>
                 <div class="panel-content text-dim">[ PHASE 3+ ]</div>
             </div>