docs: standardize and validate plugin READMEs

daily-wallpaper/README.md

@@ -1,10 +1,34 @@
 # Daily Wallpaper
 
-Fetches a daily wallpaper from Bing or NASA and applies it through the Noctalia 5 wallpaper API.
+Daily Wallpaper fetches Bing's image of the day or NASA's image of the day and
+applies it through Noctalia's wallpaper API.
 
-The service checks on startup and then every 10 minutes. It downloads at most one image per source and Bing locale per day, stores its files in a dedicated `daily-wallpaper` directory, and removes cached images older than 5 days. Repeated failures are logged, but error notifications are limited to once per day.
+## Plugin
 
-Settings:
+| Field | Value |
+| --- | --- |
+| ID | `nzlov/daily-wallpaper` |
+| Entry | Service: `service` |
 
-- Source: Bing or NASA.
-- Locale: Bing market locale such as `en-US`, `de-DE`, or `fr-FR`. NASA ignores this setting.
+## Usage
+
+Enable the plugin in Settings → Plugins. Its headless service checks for the
+current image on startup and every ten minutes, applying at most one new image
+per source and Bing locale each day.
+
+Choose Bing or NASA under the plugin's settings. Bing accepts a market locale
+such as `en-US`, `de-DE`, or `fr-FR`; NASA ignores the locale setting.
+
+## Settings
+
+| Setting | Type | Default | Description |
+| --- | --- | --- | --- |
+| `source` | `select` | `bing` | Selects Bing or NASA as the daily image source. |
+| `locale` | `string` | *(automatic)* | Bing market locale; an empty value uses the service default. |
+
+## Notes
+
+The service contacts the selected provider and downloads images into a
+dedicated `daily-wallpaper` cache directory. It removes cached images older
+than five days. Repeated failures are logged, but error notifications are
+limited to once per day.