feat: add omit_cards chips panel to deck generator HTML

ui/deckgenerator.html

@@ -138,6 +138,25 @@
                     </div>
                 </div>
 
+                                <!-- Omit Cards (chips input) -->
+                <div class="dg-panel">
+                    <div class="dg-panel-header">
+                        <span class="dg-panel-title">Omit Cards</span>
+                    </div>
+                    <div class="dg-panel-body">
+                        <div class="dg-omit-wrap" id="dg-omit-wrap">
+                            <div class="dg-omit-chips" id="dg-omit-chips"></div>
+                            <input
+                                type="text"
+                                class="dg-input dg-omit-input"
+                                id="dg-omit-input"
+                                placeholder="Type a card name and press Enter…"
+                            />
+                        </div>
+                        <small class="dg-hint">Cards listed here will be excluded from the generated deck.</small>
+                    </div>
+                </div>
+
                 <!-- Action Buttons -->
                 <div class="dg-actions">
                     <button class="dg-btn dg-btn-preview" id="dg-preview-btn" disabled>