feat: complete include/exclude observability, fix validation bugs, and organize tests

- Add structured logging for include/exclude operations with comprehensive event tracking
- Fix duplicate counting bug in validation API by eliminating double validation passes
- Simplify color identity validation UX by consolidating into single 'illegal' status
- Organize project structure by moving all test files to centralized code/tests/ directory
- Update documentation reflecting feature completion and production readiness
- Add validation test scripts and performance benchmarks confirming targets met
- Finalize include/exclude feature as production-ready with EDH format compliance

code/tests/test_web_form.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+"""
+Test to check if the web form is properly sending exclude_cards
+"""
+
+import requests
+import re
+
+def test_web_form_exclude():
+    """Test that the web form properly handles exclude cards"""
+    
+    print("=== Testing Web Form Exclude Flow ===")
+    
+    # Test 1: Check if the exclude textarea is visible
+    print("1. Checking if exclude textarea is visible in new deck modal...")
+    
+    try:
+        response = requests.get("http://localhost:8080/build/new")
+        if response.status_code == 200:
+            content = response.text
+            if 'name="exclude_cards"' in content:
+                print("   ✅ exclude_cards textarea found in form")
+            else:
+                print("   ❌ exclude_cards textarea NOT found in form")
+                print("   Checking for Advanced Options section...")
+                if 'Advanced Options' in content:
+                    print("   ✅ Advanced Options section found")
+                else:
+                    print("   ❌ Advanced Options section NOT found")
+                return False
+            
+            # Check if feature flag is working
+            if 'allow_must_haves' in content or 'exclude_cards' in content:
+                print("   ✅ Feature flag appears to be working")
+            else:
+                print("   ❌ Feature flag might not be working")
+                
+        else:
+            print(f"   ❌ Failed to get modal: HTTP {response.status_code}")
+            return False
+    
+    except Exception as e:
+        print(f"   ❌ Error checking modal: {e}")
+        return False
+    
+    # Test 2: Try to submit a form with exclude cards
+    print("2. Testing form submission with exclude cards...")
+    
+    form_data = {
+        "commander": "Alesha, Who Smiles at Death",
+        "primary_tag": "Humans", 
+        "bracket": "3",
+        "exclude_cards": "Sol Ring\nByrke, Long Ear of the Law\nBurrowguard Mentor\nHare Apparent"
+    }
+    
+    try:
+        # Submit the form
+        response = requests.post("http://localhost:8080/build/new", data=form_data)
+        if response.status_code == 200:
+            print("   ✅ Form submitted successfully")
+            
+            # Check if we can see any exclude-related content in the response
+            content = response.text
+            if "exclude" in content.lower() or "excluded" in content.lower():
+                print("   ✅ Exclude-related content found in response")
+            else:
+                print("   ⚠️  No exclude-related content found in response")
+                
+        else:
+            print(f"   ❌ Form submission failed: HTTP {response.status_code}")
+            return False
+            
+    except Exception as e:
+        print(f"   ❌ Error submitting form: {e}")
+        return False
+    
+    print("3. ✅ Web form test completed")
+    return True
+
+if __name__ == "__main__":
+    test_web_form_exclude()