Offer only Windows builds as a replaced itch upload and stop a cancelled update from completing

app/src/main/java/com/droiddeck/launcher/stores/itch/ItchInstaller.kt

@@ -216,6 +216,7 @@ internal class ItchInstaller(
                 throw t
             }
             ItchStaging.merge(work, folder)
+            if (cancelled.get()) return null
             ItchStaging.delete(work)
         }
         return exe

app/src/main/java/com/droiddeck/launcher/stores/itch/ItchUpdates.kt

@@ -38,7 +38,7 @@ internal object ItchUpdates {
             val stamp = ItchUploads.updatedAt(current)
             return if (stamp > version) ItchUpdate(uploadId, stamp, ItchUploads.filename(current), false) else null
         }
-        val next = ItchUploads.windows(uploads) ?: return null
+        val next = ItchUploads.windows(uploads)?.takeIf { ItchUploads.windows(it) } ?: return null
         val stamp = ItchUploads.updatedAt(next)
         if (uploadId.isBlank() && stamp <= version) return null
         return ItchUpdate(next.optString("id"), stamp, ItchUploads.filename(next), uploadId.isNotBlank())

app/src/test/java/com/droiddeck/launcher/stores/itch/ItchUpdatesTest.kt

@@ -41,6 +41,12 @@ class ItchUpdatesTest {
         assertTrue(update.replaced)
     }
 
+    @Test fun aReplacedUploadWithNoWindowsBuildLeftIsNotOffered() {
+        val linux = list(upload("8", "2026-10-01T10:00:00Z", windows = false))
+        assertNull(ItchUpdates.evaluate(linux, "7", "2026-09-01T10:00:00Z"))
+        assertNull(ItchUpdates.evaluate(linux, "", "2026-09-01T10:00:00Z"))
+    }
+
     @Test fun anUnknownInstalledVersionNeverReportsAnUpdate() {
         assertNull(ItchUpdates.evaluate(list(upload("7", "2026-10-20T10:00:00Z")), "7", ""))
     }