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

Assisted-by: Claude:claude-opus-5

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt

@@ -2,7 +2,7 @@ package eu.kanade.tachiyomi.data.updater
 
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.util.system.isFossBuildType
-import eu.kanade.tachiyomi.util.system.isPreviewBuildType
+import eu.kanade.tachiyomi.util.system.isNightlyBuildType
 import tachiyomi.core.common.util.lang.withIOContext
 import tachiyomi.domain.release.interactor.GetApplicationRelease
 import uy.kohesive.injekt.injectLazy
@@ -21,7 +21,7 @@ class AppUpdateChecker {
             val result = getApplicationRelease.await(
                 GetApplicationRelease.Arguments(
                     isFossBuildType,
-                    isPreviewBuildType,
+                    isNightlyBuildType,
                     BuildConfig.COMMIT_COUNT.toInt(),
                     BuildConfig.VERSION_NAME,
                     GITHUB_REPO,
@@ -35,7 +35,7 @@ class AppUpdateChecker {
 }
 
 val GITHUB_REPO: String by lazy {
-    if (isPreviewBuildType) {
+    if (isNightlyBuildType) {
         "mihonapp/mihon-preview"
     } else {
         "mihonapp/mihon"
@@ -43,7 +43,7 @@ val GITHUB_REPO: String by lazy {
 }
 
 val RELEASE_TAG: String by lazy {
-    if (isPreviewBuildType) {
+    if (isNightlyBuildType) {
         "r${BuildConfig.COMMIT_COUNT}"
     } else {
         "v${BuildConfig.VERSION_NAME}"

app/src/main/java/eu/kanade/tachiyomi/util/system/BuildConfig.kt

@@ -13,8 +13,8 @@ val updaterEnabled: Boolean
 val isDebugBuildType: Boolean
     inline get() = BuildConfig.BUILD_TYPE == "debug"
 
-val isPreviewBuildType: Boolean
-    inline get() = BuildConfig.BUILD_TYPE == "preview"
+val isNightlyBuildType: Boolean
+    inline get() = BuildConfig.BUILD_TYPE == "nightly"
 
 val isReleaseBuildType: Boolean
     inline get() = BuildConfig.BUILD_TYPE == "release"