feat(wallpapers): add Immich integration with caching and rotation

This patch adds Immich integration for remote images with local
caching and pruning.
It adds image rotation to the crop flow and stores rotation
with the crop state.
It adds progress tracking and size checks during image
download to avoid oversized assets.

- Add Immich caching with size limits and automatic pruning
- Extend crop handling to support rotation and persist it
- Improve download progress and error messaging

plugins/android/src/main/java/WallpaperPlugin.kt

@@ -38,6 +38,7 @@ class ImageCropArgs {
   var zoom: Double = 1.0
   var positionX: Double = 0.5
   var positionY: Double = 0.5
+  var rotation: Int = 0
 }
 
 @InvokeArg
@@ -99,7 +100,7 @@ class WallpaperPlugin(private val activity: Activity) : Plugin(activity) {
   @Command fun setImageCrop(invoke: Invoke) = io.execute {
     try {
       val args = invoke.parseArgs(ImageCropArgs::class.java)
-      val image = WallpaperStore.setCrop(activity, args.id, args.mode, args.zoom, args.positionX, args.positionY)
+      val image = WallpaperStore.setCrop(activity, args.id, args.mode, args.zoom, args.positionX, args.positionY, args.rotation)
         ?: throw IllegalArgumentException("Bild wurde nicht gefunden")
       invoke.resolve(image)
     } catch (error: Exception) { invoke.reject(error.message ?: "Bildausschnitt konnte nicht gespeichert werden") }
@@ -143,7 +144,10 @@ class WallpaperPlugin(private val activity: Activity) : Plugin(activity) {
   }
 
   @Command fun nextWallpaper(invoke: Invoke) = io.execute {
-    if (WallpaperStore.applyNext(activity)) invoke.resolve(WallpaperStore.state(activity)) else invoke.reject("Bitte wähle zuerst Bilder aus")
+    try {
+      if (WallpaperStore.applyNext(activity)) invoke.resolve(WallpaperStore.state(activity))
+      else invoke.reject("Kein verfügbares Bild konnte angewendet werden")
+    } catch (error: Exception) { invoke.reject(error.message ?: "Das Hintergrundbild konnte nicht geändert werden") }
   }
 
   @Command fun getImmichConnection(invoke: Invoke) = io.execute {