diff --git a/homeassistant/components/powerwall/__init__.py b/homeassistant/components/powerwall/__init__.py
index 33395f5fe6a..8587101a42a 100644
--- a/homeassistant/components/powerwall/__init__.py
+++ b/homeassistant/components/powerwall/__init__.py
@@ -122,9 +122,9 @@ class PowerwallDataManager:
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up Tesla Powerwall from a config entry."""
     http_session = requests.Session()
-    ip_address = entry.data[CONF_IP_ADDRESS]
+    ip_address: str = entry.data[CONF_IP_ADDRESS]
 
-    password = entry.data.get(CONF_PASSWORD)
+    password: str | None = entry.data.get(CONF_PASSWORD)
     power_wall = Powerwall(ip_address, http_session=http_session)
     try:
         base_info = await hass.async_add_executor_job(
@@ -184,7 +184,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 
 
 def _login_and_fetch_base_info(
-    power_wall: Powerwall, host: str, password: str
+    power_wall: Powerwall, host: str, password: str | None
 ) -> PowerwallBaseInfo:
     """Login to the powerwall and fetch the base info."""
     if password is not None:
diff --git a/homeassistant/components/samsungtv/strings.json b/homeassistant/components/samsungtv/strings.json
index f1f237fa4fb..c9d08f756d0 100644
--- a/homeassistant/components/samsungtv/strings.json
+++ b/homeassistant/components/samsungtv/strings.json
@@ -7,6 +7,9 @@
         "data": {
           "host": "[%key:common::config_flow::data::host%]",
           "name": "[%key:common::config_flow::data::name%]"
+        },
+        "data_description": {
+          "host": "The hostname or IP address of your TV."
         }
       },
       "confirm": {
diff --git a/homeassistant/components/sfr_box/strings.json b/homeassistant/components/sfr_box/strings.json
index 7ea18304164..6f0001e97ce 100644
--- a/homeassistant/components/sfr_box/strings.json
+++ b/homeassistant/components/sfr_box/strings.json
@@ -26,6 +26,9 @@
         "data": {
           "host": "[%key:common::config_flow::data::host%]"
         },
+        "data_description": {
+          "host": "The hostname or IP address of your SFR device."
+        },
         "description": "Setting the credentials is optional, but enables additional functionality."
       }
     }
diff --git a/homeassistant/components/sma/strings.json b/homeassistant/components/sma/strings.json
index f5dc6c16c88..16e5d7408c4 100644
--- a/homeassistant/components/sma/strings.json
+++ b/homeassistant/components/sma/strings.json
@@ -19,6 +19,9 @@
           "ssl": "[%key:common::config_flow::data::ssl%]",
           "verify_ssl": "[%key:common::config_flow::data::verify_ssl%]"
         },
+        "data_description": {
+          "host": "The hostname or IP address of your SMA device."
+        },
         "description": "Enter your SMA device information.",
         "title": "Set up SMA Solar"
       }
diff --git a/homeassistant/components/snapcast/strings.json b/homeassistant/components/snapcast/strings.json
index 0d51c7543f1..b5673910595 100644
--- a/homeassistant/components/snapcast/strings.json
+++ b/homeassistant/components/snapcast/strings.json
@@ -7,6 +7,9 @@
           "host": "[%key:common::config_flow::data::host%]",
           "port": "[%key:common::config_flow::data::port%]"
         },
+        "data_description": {
+          "host": "The hostname or IP address of your Snapcast server."
+        },
         "title": "[%key:common::action::connect%]"
       }
     },
diff --git a/homeassistant/components/synology_dsm/media_source.py b/homeassistant/components/synology_dsm/media_source.py
index 16db365f708..3f30fe9b4e9 100644
--- a/homeassistant/components/synology_dsm/media_source.py
+++ b/homeassistant/components/synology_dsm/media_source.py
@@ -153,8 +153,7 @@ class SynologyPhotosMediaSource(MediaSource):
         ret = []
         for album_item in album_items:
             mime_type, _ = mimetypes.guess_type(album_item.file_name)
-            assert isinstance(mime_type, str)
-            if mime_type.startswith("image/"):
+            if isinstance(mime_type, str) and mime_type.startswith("image/"):
                 # Force small small thumbnails
                 album_item.thumbnail_size = "sm"
                 ret.append(