feat: complete M3 Web UI Enhancement milestone with include/exclude cards, fuzzy matching, mobile responsive design, and performance optimization

- Include/exclude cards feature complete with 300+ card knowledge base and intelligent fuzzy matching
- Enhanced visual validation with warning icons and performance benchmarks (100% pass rate)
- Mobile responsive design with bottom-floating controls, two-column layout, and horizontal scroll prevention
- Dark theme confirmation modal for fuzzy matches with card preview and alternatives
- Dual architecture support for web UI staging system and CLI direct build paths
- All M3 checklist items completed: fuzzy match modal, enhanced algorithm, summary panel, mobile responsive, Playwright tests

test_constants_refactor.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+"""
+Test script to verify that card constants refactoring works correctly.
+"""
+
+from code.deck_builder.include_exclude_utils import fuzzy_match_card_name
+
+# Test data - sample card names
+sample_cards = [
+    'Lightning Bolt',
+    'Lightning Strike', 
+    'Lightning Helix',
+    'Chain Lightning',
+    'Lightning Axe',
+    'Lightning Volley',
+    'Sol Ring',
+    'Counterspell',
+    'Chaos Warp',
+    'Swords to Plowshares',
+    'Path to Exile',
+    'Volcanic Bolt',
+    'Galvanic Bolt'
+]
+
+def test_fuzzy_matching():
+    """Test fuzzy matching with various inputs."""
+    test_cases = [
+        ('bolt', 'Lightning Bolt'),  # Should prioritize Lightning Bolt
+        ('lightning', 'Lightning Bolt'),  # Should prioritize Lightning Bolt
+        ('sol', 'Sol Ring'),  # Should prioritize Sol Ring
+        ('counter', 'Counterspell'),  # Should prioritize Counterspell
+        ('chaos', 'Chaos Warp'),  # Should prioritize Chaos Warp
+        ('swords', 'Swords to Plowshares'),  # Should prioritize Swords to Plowshares
+    ]
+    
+    print("Testing fuzzy matching after constants refactoring:")
+    print("-" * 60)
+    
+    for input_name, expected in test_cases:
+        result = fuzzy_match_card_name(input_name, sample_cards)
+        
+        print(f"Input: '{input_name}'")
+        print(f"Expected: {expected}")
+        print(f"Matched: {result.matched_name}")
+        print(f"Confidence: {result.confidence:.3f}")
+        print(f"Auto-accepted: {result.auto_accepted}")
+        print(f"Suggestions: {result.suggestions[:3]}")  # Show top 3
+        
+        if result.matched_name == expected:
+            print("✅ PASS")
+        else:
+            print("❌ FAIL")
+        print()
+
+def test_constants_access():
+    """Test that constants are accessible from imports."""
+    from code.deck_builder.builder_constants import POPULAR_CARDS, ICONIC_CARDS
+    
+    print("Testing constants access:")
+    print("-" * 30)
+    
+    print(f"POPULAR_CARDS count: {len(POPULAR_CARDS)}")
+    print(f"ICONIC_CARDS count: {len(ICONIC_CARDS)}")
+    
+    # Check that Lightning Bolt is in both sets
+    lightning_bolt_in_popular = 'Lightning Bolt' in POPULAR_CARDS
+    lightning_bolt_in_iconic = 'Lightning Bolt' in ICONIC_CARDS
+    
+    print(f"Lightning Bolt in POPULAR_CARDS: {lightning_bolt_in_popular}")
+    print(f"Lightning Bolt in ICONIC_CARDS: {lightning_bolt_in_iconic}")
+    
+    if lightning_bolt_in_popular and lightning_bolt_in_iconic:
+        print("✅ Constants are properly set up")
+    else:
+        print("❌ Constants missing Lightning Bolt")
+    
+    print()
+
+if __name__ == "__main__":
+    test_constants_access()
+    test_fuzzy_matching()