refactor!: use all ruff rules

src/registry.py

@@ -1,31 +1,37 @@
 import logging
+import typing
 
-from . import data_dir, page, params
+from . import data_dir, page
+
+if typing.TYPE_CHECKING:
+    from . import params
 
 
 class Registry:
-    def __init__(self, params: params.Parameters):
+    def __init__(self, params: params.Parameters) -> None:
         self.logger = logging.getLogger(self.__class__.__name__)
         self.pages: dict[str, page.Page] = {}
         self.data_dir = data_dir.DataDir(params.data_dir)
         self.prefix = f"http://{params.host}"
 
-    def load_pages(self):
+    def load_pages(self) -> None:
         self.pages = {}
         for path in self.data_dir.list_paths():
             self.add(path)
 
-    def add(self, path: str):
+    def add(self, path: str) -> None:
         self.pages[path] = page.Page(
-            path, self.data_dir.has_index(path), self.data_dir.get_host(path)
+            path,
+            self.data_dir.has_index(path),
+            self.data_dir.get_host(path),
         )
         self.logger.info("Updated %s%s", self.prefix, str(self.pages[path]))
 
-    def set_host(self, path: str, host: str):
+    def set_host(self, path: str, host: str) -> None:
         self.data_dir.set_host(path, host)
         self.pages[path].host = host
 
-    def remove(self, path: str):
+    def remove(self, path: str) -> None:
         page = self.pages[path]
         del self.pages[path]
         self.logger.info("Removed %s%s", self.prefix, str(page))
@@ -34,3 +40,4 @@ class Registry:
         for p in self.pages.values():
             if p.host == host:
                 return p
+        return None