Deepen TDS integration: full terminal CSS coverage + 3 new backgrounds

Terminal Mode:
- Text selection: orange highlight rgba(255,107,0,0.28)
- Links: cyan (#00D4FF) with orange hover glow (#FF6B00)
- Code/pre: TDS green (#00FF88) on terminal bg, left green border
- Strong/b → orange, em/i → cyan, mark → amber, del → red
- Blockquote: orange left border (matches chat reply quotes)
- HR: cyan border with dim glow
- Input/textarea/[contenteditable] focus: orange glow ring
- Tables: TDS headers (orange+uppercase), cyan borders, hover rows
- List markers: cyan ▸ for ul, orange for ol
- Boot box-drawing alignment fixed (51→52 ═)
- data-theme=\"dark\" set on html element when terminal active
- Updated description: correct TDS palette names
- ▶ Boot replay button in settings (visible when terminal on)

Chat backgrounds (+3):
- Tactical: LotusGuild TDS exact cyan dot-grid (28px)
- Circuit: green grid + node dots on dark terminal bg
- Hex Grid: isometric cyan hexagonal outlines

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

src/lotus-boot.ts

@@ -1,5 +1,5 @@
 const BOOT_MESSAGES = [
-  '╔═══════════════════════════════════════════════════╗',
+  '╔════════════════════════════════════════════════════╗',
   '║      LOTUS CHAT  —  LOTUSGUILD PLATFORM            ║',
   '║   SECURE MATRIX CLIENT  —  TERMINAL MODE ACTIVE    ║',
   '╚════════════════════════════════════════════════════╝',