feat: explain task phase in android progress cards

android/app/src/main/java/com/hyzq/boss/BossUi.java

@@ -1339,6 +1339,19 @@ public final class BossUi {
         titleRow.addView(pin);
         card.addView(titleRow);
 
+        String phase = progress == null ? "" : progress.optString("phase", "").trim();
+        if (!TextUtils.isEmpty(phase)) {
+            TextView phaseView = secondaryText(context, "当前状态：" + executionPhaseLabel(phase));
+            phaseView.setPadding(0, dp(context, 8), 0, 0);
+            card.addView(phaseView);
+        }
+        String lastProgressAt = progress == null ? "" : progress.optString("lastProgressAt", "").trim();
+        if (!TextUtils.isEmpty(lastProgressAt)) {
+            TextView lastProgressView = secondaryText(context, "最后更新：" + lastProgressAt);
+            lastProgressView.setPadding(0, dp(context, 4), 0, 0);
+            card.addView(lastProgressView);
+        }
+
         JSONArray steps = progress == null ? null : progress.optJSONArray("steps");
         if (steps == null || steps.length() == 0) {
             card.addView(progressLine(context, "等待执行进度回写", "running"));
@@ -1931,6 +1944,37 @@ public final class BossUi {
         return card;
     }
 
+    private static String executionPhaseLabel(String phase) {
+        switch (phase) {
+            case "queued":
+                return "等待设备接收";
+            case "claimed":
+                return "设备已接收";
+            case "executor_starting":
+                return "正在启动执行器";
+            case "turn_started":
+                return "已写入目标线程";
+            case "awaiting_reply":
+                return "等待线程回复";
+            case "completing":
+                return "正在回写结果";
+            case "completed":
+                return "已完成";
+            case "recoverable_failed":
+                return "可恢复失败";
+            case "terminal_failed":
+                return "执行失败";
+            case "timed_out":
+                return "执行超时";
+            case "canceled":
+                return "已取消";
+            case "needs_user_action":
+                return "需要用户处理";
+            default:
+                return phase;
+        }
+    }
+
     private static View progressLine(Context context, String text, String status) {
         LinearLayout row = new LinearLayout(context);
         row.setOrientation(LinearLayout.HORIZONTAL);

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

@@ -948,6 +948,42 @@ public class ProjectDetailActivityUiTest {
         assertTrue(viewTreeContainsText(messageView, "Mendel（explorer）"));
     }
 
+    @Test
+    public void executionProgressMessageRendersPhaseExplanation() throws Exception {
+        Intent intent = new Intent()
+                .putExtra(ProjectDetailActivity.EXTRA_PROJECT_ID, "thread-phase")
+                .putExtra(ProjectDetailActivity.EXTRA_PROJECT_NAME, "Boss开发主线程");
+        TestProjectDetailActivity activity = Robolectric
+                .buildActivity(TestProjectDetailActivity.class, intent)
+                .setup()
+                .get();
+
+        JSONObject message = new JSONObject()
+                .put("id", "progress-phase-1")
+                .put("sender", "master")
+                .put("senderLabel", "主 Agent")
+                .put("body", "执行进度")
+                .put("kind", "execution_progress")
+                .put("sentAt", "2026-06-06T10:16:00+08:00")
+                .put("executionProgress", new JSONObject()
+                        .put("status", "running")
+                        .put("phase", "awaiting_reply")
+                        .put("lastProgressAt", "2026-06-06T10:15:30+08:00")
+                        .put("steps", new JSONArray()
+                                .put(new JSONObject()
+                                        .put("text", "等待目标线程回复")
+                                        .put("status", "running"))));
+
+        View messageView = ReflectionHelpers.callInstanceMethod(
+                activity,
+                "buildMessageView",
+                ReflectionHelpers.ClassParameter.from(JSONObject.class, message)
+        );
+
+        assertTrue(viewTreeContainsText(messageView, "当前状态：等待线程回复"));
+        assertTrue(viewTreeContainsText(messageView, "最后更新：2026-06-06T10:15:30+08:00"));
+    }
+
     @Test
     public void executionProgressMessageRendersCodexApprovalAndFileChangeSections() throws Exception {
         Intent intent = new Intent()