refactor: leverage new dependency features from recent updates (#5057)

feature/firmware/build.gradle.kts

@@ -58,11 +58,12 @@ kotlin {
 
         androidMain.dependencies { implementation(libs.markdown.renderer.android) }
 
+        commonTest.dependencies { implementation(projects.core.testing) }
+
         val androidHostTest by getting {
             dependencies {
                 implementation(libs.junit)
                 implementation(libs.kotlinx.coroutines.test)
-                implementation(libs.androidx.compose.ui.test.junit4)
                 implementation(libs.androidx.test.ext.junit)
             }
         }

feature/firmware/src/commonMain/kotlin/org/meshtastic/feature/firmware/ota/dfu/DfuZipParser.kt

@@ -17,7 +17,9 @@
 package org.meshtastic.feature.firmware.ota.dfu
 
 import co.touchlab.kermit.Logger
+import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.json.Json
+import kotlinx.serialization.json.JsonDecodingException
 
 private val json = Json { ignoreUnknownKeys = true }
 
@@ -36,7 +38,11 @@ internal fun parseDfuZipEntries(entries: Map<String, ByteArray>): DfuZipPackage
 
     val manifest =
         runCatching { json.decodeFromString<DfuManifest>(manifestBytes.decodeToString()) }
-            .getOrElse { e -> throw DfuException.InvalidPackage("Failed to parse manifest.json: ${e.message}") }
+            .getOrElse { e ->
+                @OptIn(ExperimentalSerializationApi::class)
+                val detail = (e as? JsonDecodingException)?.shortMessage ?: e.message
+                throw DfuException.InvalidPackage("Failed to parse manifest.json: $detail")
+            }
 
     val entry =
         manifest.manifest.primaryEntry ?: throw DfuException.InvalidPackage("No firmware entry found in manifest.json")