Add per-tab tutorials, profile expand/collapse, and fix card animation

- Add sub-tutorials for Dashboard, Targets, Sources, and Profiles tabs
  with ? trigger buttons, en/ru/zh translations, and hidden-ancestor
  skip via offsetParent check
- Add expand/collapse all buttons to Profiles tab toolbar
- Move dashboard poll slider from section header to toolbar
- Fix cardEnter animation forcing opacity:1 on disabled profile cards
- Use data-card-section selectors instead of data-cs-toggle to avoid
  z-index misalignment during tutorial spotlight
- Add tutorial sync convention to CLAUDE.md

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

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

@@ -1301,7 +1301,7 @@ function renderPictureSourcesList(streams) {
 
     const tabBar = `<div class="stream-tab-bar">${tabs.map(tab =>
         `<button class="stream-tab-btn${tab.key === activeTab ? ' active' : ''}" data-stream-tab="${tab.key}" onclick="switchStreamTab('${tab.key}')">${tab.icon} ${t(tab.titleKey)} <span class="stream-tab-count">${tab.count}</span></button>`
-    ).join('')}<span class="cs-expand-collapse-group"><button class="btn-expand-collapse" onclick="expandAllStreamSections()" title="${t('section.expand_all')}">⊞</button><button class="btn-expand-collapse" onclick="collapseAllStreamSections()" title="${t('section.collapse_all')}">⊟</button></span></div>`;
+    ).join('')}<span class="cs-expand-collapse-group"><button class="btn-expand-collapse" onclick="expandAllStreamSections()" title="${t('section.expand_all')}">⊞</button><button class="btn-expand-collapse" onclick="collapseAllStreamSections()" title="${t('section.collapse_all')}">⊟</button><button class="tutorial-trigger-btn" onclick="startSourcesTutorial()" title="${t('tour.restart')}">?</button></span></div>`;
 
     const renderAudioSourceCard = (src) => {
         const isMono = src.source_type === 'mono';