chore(tests): organize test scripts and beautify account creation email

- Moved scattered Python test scripts from root and 'admin/development/' to 'tests/'.
- Beautified the HTML email body for account creation links in 'app/methods/person_methods.py' with a modern responsive design.

tests/test_v3_extra.py

@@ -0,0 +1,55 @@
+import requests
+import json
+
+# Configuration
+BASE_URL = "https://dev-api.oneskyit.com/v3/crud"
+ACCOUNT_ID = "nqOzejLCDXM" # Legacy Header Fallback
+
+def get_headers(include_account=True):
+    headers = {
+        "Content-Type": "application/json"
+    }
+    if include_account:
+        headers["X-Account-ID"] = ACCOUNT_ID
+    return headers
+
+def test_endpoint(path, description, include_account=True):
+    print(f"--- Testing: {description} ---")
+    url = f"{BASE_URL}{path}"
+    try:
+        response = requests.get(url, headers=get_headers(include_account))
+        print(f"URL: {response.url}")
+        print(f"Status Code: {response.status_code}")
+        
+        data = response.json()
+        result_data = data.get('data')
+        
+        if isinstance(result_data, list):
+            print(f"Result Count: {len(result_data)}")
+            if len(result_data) > 0:
+                print(f"First Item: {json.dumps(result_data[0], indent=2)[:300]}...")
+        else:
+            print(f"Result Data: {json.dumps(result_data, indent=2)}")
+            
+        if response.status_code != 200:
+            print(f"Error Message: {data.get('status_message')}")
+            
+    except Exception as e:
+        print(f"Error during test: {e}")
+    print("-" * 40 + "\n")
+
+if __name__ == "__main__":
+    # Test Users
+    test_endpoint("/user/", "List Users (Default filter)")
+    test_endpoint("/user/?enabled=all&hidden=all", "List Users (Bypass filter)")
+    
+    # Test Sites
+    test_endpoint(f"/account/{ACCOUNT_ID}/site/", "List Sites (Account Filter)")
+    
+    # Test Site Domains
+    test_endpoint("/site_domain/", "List Site Domains (Default filter)")
+    test_endpoint("/site_domain/?enabled=all&hidden=all", "List Site Domains (Bypass filter)")
+
+    # Test Legacy Site Domain Lookup (Initial frontend request)
+    # This route is in api_crud.py (v1) and needs to work without an account ID header
+    test_endpoint("/../../crud/site/domain/scott.localhost:5173?use_alt_table=true&use_alt_base=true", "Legacy Site Domain Lookup", include_account=False)