dashboard: Small cleanups to dashboard (#5841)

esphome/dashboard/settings.py

@@ -23,45 +23,45 @@ class DashboardSettings:
         self.cookie_secret: str | None = None
         self.absolute_config_dir: Path | None = None
 
-    def parse_args(self, args):
+    def parse_args(self, args: Any) -> None:
         self.on_ha_addon: bool = args.ha_addon
-        password: str = args.password or os.getenv("PASSWORD", "")
+        password = args.password or os.getenv("PASSWORD") or ""
         if not self.on_ha_addon:
-            self.username: str = args.username or os.getenv("USERNAME", "")
+            self.username = args.username or os.getenv("USERNAME") or ""
             self.using_password = bool(password)
         if self.using_password:
             self.password_hash = password_hash(password)
-        self.config_dir: str = args.configuration
-        self.absolute_config_dir: Path = Path(self.config_dir).resolve()
+        self.config_dir = args.configuration
+        self.absolute_config_dir = Path(self.config_dir).resolve()
         CORE.config_path = os.path.join(self.config_dir, ".")
 
     @property
-    def relative_url(self):
-        return os.getenv("ESPHOME_DASHBOARD_RELATIVE_URL", "/")
+    def relative_url(self) -> str:
+        return os.getenv("ESPHOME_DASHBOARD_RELATIVE_URL") or "/"
 
     @property
     def status_use_ping(self):
         return get_bool_env("ESPHOME_DASHBOARD_USE_PING")
 
     @property
-    def status_use_mqtt(self):
+    def status_use_mqtt(self) -> bool:
         return get_bool_env("ESPHOME_DASHBOARD_USE_MQTT")
 
     @property
-    def using_ha_addon_auth(self):
+    def using_ha_addon_auth(self) -> bool:
         if not self.on_ha_addon:
             return False
         return not get_bool_env("DISABLE_HA_AUTHENTICATION")
 
     @property
-    def using_auth(self):
+    def using_auth(self) -> bool:
         return self.using_password or self.using_ha_addon_auth
 
     @property
-    def streamer_mode(self):
+    def streamer_mode(self) -> bool:
         return get_bool_env("ESPHOME_STREAMER_MODE")
 
-    def check_password(self, username, password):
+    def check_password(self, username: str, password: str) -> bool:
         if not self.using_auth:
             return True
         if username != self.username: