Refactor code structure for improved readability and maintainability

app/utils/cookies.py

@@ -0,0 +1,24 @@
+"""Cookie parsing utilities for WebSocket authentication."""
+
+from typing import Optional
+
+
+def parse_cookies(cookie_header: str) -> dict[str, str]:
+    """Parse HTTP cookie header into a dictionary."""
+    cookies = {}
+    if not cookie_header:
+        return cookies
+
+    for cookie in cookie_header.split(";"):
+        cookie = cookie.strip()
+        if "=" in cookie:
+            name, value = cookie.split("=", 1)
+            cookies[name.strip()] = value.strip()
+
+    return cookies
+
+
+def extract_access_token_from_cookies(cookie_header: str) -> Optional[str]:
+    """Extract access token from HTTP cookies."""
+    cookies = parse_cookies(cookie_header)
+    return cookies.get("access_token")