Allow the provided URL to be used as the stock loading image.

README.md

@@ -217,7 +217,7 @@ See the [fully expanded view configuration example](#config-expanded-view) for h
 | - | - | - | - |
 | `default` | `live` | :white_check_mark: | The view to show in the card by default. The default camera is the first one listed. See [views](#views) below.|
 | `camera_select` | `current` | :white_check_mark: | The view to show when a new camera is selected (e.g. in the camera menu). If `current` the view is unchanged when a new camera is selected. Other acceptable values may be seen at [views](#views) below.|
-| `dark_mode` | `off` | :white_check_mark: | Whether or not to turn dark mode `on`, `off` or `auto` to automatically turn on if the card `timeout_seconds` has expired (i.e. card has been left unattended for that period of time) or if dark mode is enabled in the HA profile theme setting. Dark mode dims the brightness by `50%`.|
+| `dark_mode` | `off` | :white_check_mark: | Whether or not to turn dark mode `on`, `off` or `auto` to automatically turn on if the card `timeout_seconds` has expired (i.e. card has been left unattended for that period of time) or if dark mode is enabled in the HA profile theme setting. Dark mode dims the brightness by `25%`.|
 | `timeout_seconds` | `300` | :white_check_mark: | A numbers of seconds of inactivity after user interaction, after which the card will reset to the default configured view (i.e. 'screensaver' functionality). Inactivity is defined as lack of mouse/touch interaction with the Frigate card. If the default view occurs sooner (e.g. via `update_seconds` or manually) the timer will be stopped. `0` means disable this functionality. |
 | `update_seconds` | `0` | :white_check_mark: | A number of seconds after which to automatically update/refresh the default view. See [card updates](#card-updates) below for behavior and usecases. If the default view occurs sooner (e.g. manually) the timer will start over. `0` disables this functionality.|
 | `update_force` | `false` | :white_check_mark: | Whether automated card updates/refreshes should ignore user interaction. See [card updates](#card-updates) below for behavior and usecases.|
@@ -515,7 +515,7 @@ See the [fully expanded image configuration example](#config-expanded-image) for
 | Option | Default | Overridable | Description |
 | - | - | - | - |
 | `mode` | `url` | :white_check_mark: | Mode of the the `image` [view](#views). Value must be one of `url` (to fetch an arbitrary image URL), `camera` (to show a still of the currently selected camera using either `camera_entity` or `webrtc_card.entity` in that order of precedence), or `screensaver` (to show an [embedded stock Frigate card logo](https://github.com/dermotduffy/frigate-hass-card/blob/main/src/images/frigate-bird-in-sky.jpg)). In either `url` or `camera` mode, the `screensaver` content is used as a fallback if a URL is not specified or cannot be derived. |
-| `url` | | :white_check_mark: |  A static image URL to be used when the `mode` is set to `url`. Note that a `_t=[timestsamp]` query parameter will be automatically added to all URLs such that the image will not be cached by the browser.|
+| `url` | | :white_check_mark: |  A static image URL to be used when the `mode` is set to `url` or when a temporary image is required (e.g. may appear momentarily prior to load of a camera snapshot in the `camera` mode). Note that a `_t=[timestsamp]` query parameter will be automatically added to all URLs such that the image will not be cached by the browser.|
 | `refresh_seconds` | 0 | :white_check_mark: | The image will be refreshed at least every `refresh_seconds` (it may refresh more frequently, e.g. whenever Home Assistant updates its camera security token). `0` implies no refreshing. |
 | `actions` | | :white_check_mark: | Actions to use for the `image` view. See [actions](#actions) below.|