feat: AI bug fixes, deck/collection migration, and enrichment pipeline

- Fix AI turn pipeline: add cmc to Scryfall cache, tag isRamp/isRemoval/
  isBoardWipe from oracle text during enrichment, enable post-combat spell
  casting for all difficulty levels
- Migrate deck builder, deck generator, and collection from ui/ to
  lan-client/ as iframe-embedded panels with LAB_API_BASE patching
- Fix ai-bridge.js: turnNumber, deck_name, battlefield serialization,
  5-playstyle mapping, window exports for cross-script access
- Fix engine.js: battlefieldCards flat array (not player.battlefield),
  aiDeclareAttacks extraction, combat overlay fixes
- Fix collection.js: template literal, column visibility alignment,
  set_code key, oracle text column, sortable category
- Add exile/graveyard last-card image rendering in ui.js
- Make state_encoder.py resilient to mixed input types
- Enrich type_line from Scryfall at card insert in deckbuilder.py

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

lan-client/style.css

@@ -3541,3 +3541,35 @@ kbd {
   border-color: rgba(255,255,255,0.2);
   color: var(--color-text-muted);
 }
+
+/* ── Fullscreen Panel (Deck Builder / Deck Generator) ──── */
+.fullscreen-panel {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100vw;
+  height: 100vh;
+  z-index: 9000;
+  background: #0a0a14;
+  display: flex;
+  flex-direction: column;
+}
+.fullscreen-panel.hidden {
+  display: none;
+}
+.fullscreen-panel-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  height: 36px;
+  padding: 0 12px;
+  background: rgba(20,20,35,0.95);
+  border-bottom: 1px solid rgba(255,255,255,0.08);
+  color: rgba(255,255,255,0.8);
+  font-size: 13px;
+  font-weight: 600;
+}
+.fullscreen-panel-header .btn-util {
+  font-size: 18px;
+  line-height: 1;
+}