Implement LotusGuild TDS v1.2 terminal mode

- Rewrite lotus-terminal.css.ts: TDS-exact dot-grid bg, scanlines, vignette,
  glitch keyframes, orange caret, cyan scrollbars, all --lt-* CSS vars
- Fix lotusTerminalTheme in colors.css.ts: full TDS color palette
  (Orange primary, Cyan secondary, Green success, Amber warning, Red critical)
- Add lotus-boot.ts: matrix boot sequence at 65ms intervals, green phosphor glow
- Update ThemeManager.tsx: call runLotusBootSequence on terminal mode activate,
  UnAuthRouteThemeManager now supports lotusTerminal setting
- Update index.html: add JetBrains Mono + VT323 from Google Fonts

src/lotus-boot.ts

@@ -0,0 +1,74 @@
+const BOOT_MESSAGES = [
+  '╔═══════════════════════════════════════════════════╗',
+  '║      LOTUS CHAT  —  LOTUSGUILD PLATFORM            ║',
+  '║   SECURE MATRIX CLIENT  —  TERMINAL MODE ACTIVE    ║',
+  '╚════════════════════════════════════════════════════╝',
+  '',
+  '[ OK ] Kernel modules loaded',
+  '[ OK ] Filesystem mounted read-write',
+  '[ OK ] Network interfaces configured',
+  '[ OK ] Matrix homeserver connection established',
+  '[ OK ] End-to-end encryption initialized',
+  '[ OK ] Authentication service started',
+  '[ OK ] Security headers applied',
+  '[ OK ] Room state synchronized',
+  '[ OK ] Terminal interface rendered',
+  '',
+  '> ALL SYSTEMS NOMINAL — LOTUS CHAT',
+  '',
+];
+
+const STORAGE_KEY = 'lt_booted_lotus-chat';
+
+export function resetBootSequence(): void {
+  sessionStorage.removeItem(STORAGE_KEY);
+}
+
+export function runLotusBootSequence(force = false): void {
+  if (!force && sessionStorage.getItem(STORAGE_KEY)) return;
+  sessionStorage.setItem(STORAGE_KEY, '1');
+
+  const overlay = document.createElement('div');
+  overlay.id = 'lt-boot';
+  overlay.style.cssText = [
+    'position:fixed',
+    'inset:0',
+    'background:#000',
+    'z-index:10100',
+    'display:flex',
+    'align-items:flex-start',
+    'justify-content:flex-start',
+    'padding:3rem',
+    "font-family:'JetBrains Mono','Fira Code','Courier New',monospace",
+  ].join(';');
+
+  const pre = document.createElement('pre');
+  pre.style.cssText = [
+    'font-family:inherit',
+    'font-size:0.78rem',
+    'color:#00FF88',
+    'text-shadow:0 0 6px #00FF88,0 0 16px rgba(0,255,136,0.45)',
+    'line-height:1.7',
+    'white-space:pre-wrap',
+    'overflow:hidden',
+  ].join(';');
+  overlay.appendChild(pre);
+  document.body.appendChild(overlay);
+
+  let i = 0;
+  let text = '';
+  const interval = setInterval(() => {
+    if (i >= BOOT_MESSAGES.length) {
+      clearInterval(interval);
+      setTimeout(() => {
+        overlay.style.transition = 'opacity 0.5s ease';
+        overlay.style.opacity = '0';
+        setTimeout(() => overlay.remove(), 500);
+      }, 500);
+      return;
+    }
+    text += BOOT_MESSAGES[i] + '\n';
+    pre.textContent = text;
+    i++;
+  }, 65);
+}