feat: final production polish — light mode rebuild, lt.init(), cross-tab theme

Light mode — complete rebuild (section 51):
- Full token override for every surface, component, and state
- Desaturated accents: orange #c44e00, cyan #0062b8, green #006d35 etc.
- Glows replaced with subtle drop-shadow rings (no neon on white)
- Covers: toasts, modals, dropdowns, notification panel, context menu,
  right drawer, combobox, typeahead, wizard, timeline, pagination, tabs,
  badges, tables, code blocks, skeleton, avatar, sortable, markdown,
  scrollbars, buttons, nav drawer, WS status — nothing missed
- Dot-grid: neutral gray (was incorrect blue tint)
- Toast background uses var(--bg-overlay) instead of hardcoded dark rgba

Theme system improvements:
- _applyTheme now sets document.documentElement.style.colorScheme
- theme-color meta tag syncs on toggle (browser chrome follows theme)
- Cross-tab sync via storage event (toggle in one tab updates others)

lt.init() master initializer:
- Single call wires accordion, tooltip, alerts, clipboard, sidebar,
  submenus, and boot sequence
- Replaces 6+ individual .init() calls in user code
- demo HTML updated to use lt.init({ bootName: 'MY APP' })

Accessibility:
- Ticket table: add <caption class="lt-sr-only"> for WCAG compliance
- Table gets aria-label attribute

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

base.html

@@ -455,7 +455,8 @@
             <div class="lt-section-header">Ticket Queue</div>
 
             <div class="lt-table-wrap">
-              <table class="lt-table lt-table-responsive" id="ticket-table">
+              <table class="lt-table lt-table-responsive" id="ticket-table" aria-label="Ticket queue">
+                <caption class="lt-sr-only">Ticket queue — sorted by priority</caption>
                 <thead>
                   <tr>
                     <th><input type="checkbox" class="lt-checkbox" aria-label="Select all"></th>
@@ -1696,17 +1697,9 @@ Storage array link-down on `compute-storage-01`.
   <!-- Init v1.2 modules -->
   <script>
     document.addEventListener('DOMContentLoaded', () => {
-      // Accordion
-      lt.accordion.init();
-
-      // Tooltips (JS-positioned — optional, CSS tooltips work without this)
-      lt.tooltip.init();
-
-      // Clipboard copy buttons ([data-copy])
-      lt.clipboard.initCopyButtons();
-
-      // Alert dismiss buttons
-      lt.alerts.init();
+      // One call initializes accordion, tooltip, alerts, clipboard, sidebar, submenus + boot.
+      // Pass { boot: false } to skip the terminal boot animation.
+      lt.init({ bootName: 'MY APP' });
 
       // Command palette demo commands
       lt.cmdPalette.init([