Move Scenes into Automations tab, smaller Capture button, scene crosslinks

- Merge Scenes tab into Automations tab as a second CardSection below automations
- Make dashboard Capture button match Stop All sizing
- Dashboard scene cards navigate to automations tab on click (crosslink)
- Add scene steps to automations tutorial
- Fix tour.tgt.devices to say "LED controllers" instead of "WLED controllers"
- Update command palette and navigation for new scene location

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/static/js/features/tabs.js

@@ -60,8 +60,6 @@ export function switchTab(name, { updateHash = true, skipLoad = false } = {}) {
             if (typeof window.loadTargetsTab === 'function') window.loadTargetsTab();
         } else if (name === 'automations') {
             if (typeof window.loadAutomations === 'function') window.loadAutomations();
-        } else if (name === 'scenes') {
-            if (typeof window.loadScenes === 'function') window.loadScenes();
         }
     }
 }
@@ -82,8 +80,6 @@ export function initTabs() {
         saved = localStorage.getItem('activeTab');
     }
 
-    // Migrate legacy 'devices' tab to 'targets'
-    if (saved === 'devices') saved = 'targets';
     if (!saved || !document.getElementById(`tab-${saved}`)) saved = 'dashboard';
     switchTab(saved);
 }