fix(widget): avoid recycling aliased source bitmap for 2:3 covers (#4850)

Bitmap.createBitmap returns the same immutable instance when the
center-crop covers the whole source, which happens for covers that
decode to exactly 2:3. writeThumbnail then recycled that instance
before createScaledBitmap used it, crashing with "cannot use a
recycled source in createBitmap". Guard the recycle the same way the
scaled vs cropped case is already guarded, and add an instrumented
regression test.

Also bundles a pending widget debugging note and a regenerated
fastlane README that were staged in the working tree.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/readest-app/src-tauri/plugins/tauri-plugin-native-bridge/android/src/main/java/ReadingWidgetStore.kt

@@ -57,7 +57,11 @@ object ReadingWidgetStore {
         val cropX = (srcW - cropW) / 2
         val cropY = (srcH - cropH) / 2
         val cropped = Bitmap.createBitmap(bitmap, cropX, cropY, cropW, cropH)
-        bitmap.recycle()
+        // createBitmap returns the SAME instance when the crop covers the whole
+        // (immutable) source — i.e. covers already at exactly 2:3. Recycling here
+        // would recycle `cropped` too and crash createScaledBitmap below with
+        // "cannot use a recycled source". Mirror the scaled !== cropped guard.
+        if (cropped !== bitmap) bitmap.recycle()
 
         // Scale the cropped bitmap to the target size.
         val scaled = Bitmap.createScaledBitmap(cropped, THUMB_WIDTH, THUMB_HEIGHT, true)