Rename preview build type to nightly and label FOSS builds (#3760)

Assisted-by: Claude:claude-opus-5

domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt

@@ -11,7 +11,7 @@ class GetApplicationRelease(
 
         // Check if latest version is different from current version
         val isNewVersion = isNewVersion(
-            arguments.isPreview,
+            arguments.isNightly,
             arguments.commitCount,
             arguments.versionName,
             release.version,
@@ -23,15 +23,15 @@ class GetApplicationRelease(
     }
 
     private fun isNewVersion(
-        isPreview: Boolean,
+        isNightly: Boolean,
         commitCount: Int,
         versionName: String,
         versionTag: String,
     ): Boolean {
         // Removes prefixes like "r" or "v"
         val newVersion = versionTag.replace("[^\\d.]".toRegex(), "")
-        return if (isPreview) {
-            // Preview builds: based on releases in "mihonapp/mihon-preview" repo
+        return if (isNightly) {
+            // Nightly builds: based on releases in "mihonapp/mihon-preview" repo
             // tagged as something like "r1234"
             newVersion.toInt() > commitCount
         } else {
@@ -54,7 +54,7 @@ class GetApplicationRelease(
 
     data class Arguments(
         val isFoss: Boolean,
-        val isPreview: Boolean,
+        val isNightly: Boolean,
         val commitCount: Int,
         val versionName: String,
         val repository: String,

domain/src/test/java/tachiyomi/domain/release/interactor/GetApplicationReleaseTest.kt

@@ -22,7 +22,7 @@ class GetApplicationReleaseTest {
     }
 
     @Test
-    fun `When has update but is preview expect new update`() = runTest {
+    fun `When has update but is nightly expect new update`() = runTest {
         val release = Release(
             "r2000",
             "info",
@@ -35,7 +35,7 @@ class GetApplicationReleaseTest {
         val result = getApplicationRelease.await(
             GetApplicationRelease.Arguments(
                 isFoss = false,
-                isPreview = true,
+                isNightly = true,
                 commitCount = 1000,
                 versionName = "",
                 repository = "test",
@@ -61,7 +61,7 @@ class GetApplicationReleaseTest {
         val result = getApplicationRelease.await(
             GetApplicationRelease.Arguments(
                 isFoss = false,
-                isPreview = false,
+                isNightly = false,
                 commitCount = 0,
                 versionName = "v1.0.0",
                 repository = "test",
@@ -87,7 +87,7 @@ class GetApplicationReleaseTest {
         val result = getApplicationRelease.await(
             GetApplicationRelease.Arguments(
                 isFoss = false,
-                isPreview = false,
+                isNightly = false,
                 commitCount = 0,
                 versionName = "v2.0.0",
                 repository = "test",