feat: add native ota progress feedback

android/app/src/test/java/com/hyzq/boss/OtaDownloadStateMapperTest.java

@@ -0,0 +1,17 @@
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class OtaDownloadStateMapperTest {
+    @Test
+    public void toProgressLabel_formatsKnownProgress() {
+        assertEquals("已下载 50%", OtaDownloadStateMapper.toProgressLabel(50, true));
+    }
+
+    @Test
+    public void toProgressLabel_handlesUnknownProgress() {
+        assertEquals("正在准备下载", OtaDownloadStateMapper.toProgressLabel(0, false));
+    }
+}