Resolve "Review tasks"

Closes #8 (closed)

aleksis/apps/matrix/util/matrix.py

@@ -12,13 +12,15 @@ class MatrixException(Exception):
     pass
 
 
-def build_url(path):
+def build_url(path: str) -> str:
+    """Build a URL to the Matrix Client Server API."""
     return urljoin(
         urljoin(get_site_preferences()["matrix__homeserver"], "_matrix/client/v3/"), path
     )
 
 
-def get_headers():
+def get_headers() -> dict[str, str]:
+    """Get the headers for a Matrix Client Server API request."""
     return {
         "Authorization": "Bearer " + get_site_preferences()["matrix__access_token"],
     }