diff --git a/docs/superpowers/plans/2026-03-27-wechat-native-ui-phase2.md b/docs/superpowers/plans/2026-03-27-wechat-native-ui-phase2.md
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+# WeChat Native UI Phase 2 Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Polish the native Android WeChat-style rollback with better chat feel, clearer OTA download/install feedback, and smoother root navigation memory.
+
+**Architecture:** Keep the approved WeChat-style root surfaces intact and limit this batch to interaction polish. Add small pure-Java helpers for chat UI state and OTA download state so the tricky behavior is unit-tested, then wire those helpers into `ProjectDetailActivity`, `AboutActivity`, and `MainActivity`.
+
+**Tech Stack:** Android AppCompat, XML layouts, Java 21, Gradle 8, JUnit4, DownloadManager, existing Boss APIs, existing release packaging and deploy scripts.
+
+---
+
+## File Structure
+
+### New files
+
+- `android/app/src/main/java/com/hyzq/boss/ProjectChatUiState.java`
+  - Pure-Java helper for send-button enabled state, optimistic pending bubble state, and auto-scroll policy.
+- `android/app/src/main/java/com/hyzq/boss/OtaDownloadStateMapper.java`
+  - Pure-Java helper for mapping `DownloadManager` progress/status into UI strings and retry/install states.
+- `android/app/src/main/java/com/hyzq/boss/RootTabMemory.java`
+  - Pure-Java helper for resolving explicit root tabs versus stored root tabs.
+- `android/app/src/test/java/com/hyzq/boss/ProjectChatUiStateTest.java`
+  - Unit tests for chat send/pending/scroll rules.
+- `android/app/src/test/java/com/hyzq/boss/OtaDownloadStateMapperTest.java`
+  - Unit tests for OTA download state mapping.
+- `android/app/src/test/java/com/hyzq/boss/RootTabMemoryTest.java`
+  - Unit tests for remembered root tab selection.
+
+### Modified files
+
+- `android/app/src/main/java/com/hyzq/boss/ProjectDetailActivity.java`
+- `android/app/src/main/java/com/hyzq/boss/AboutActivity.java`
+- `android/app/src/main/java/com/hyzq/boss/MainActivity.java`
+- `android/app/src/main/java/com/hyzq/boss/BossUi.java`
+- `README.md`
+- `docs/architecture/current_runtime_and_deploy_status_cn.md`
+- `docs/architecture/api_and_service_inventory_cn.md`
+
+## Task 1: Polish Chat Composer Feedback and Scroll Behavior
+
+**Files:**
+- Create: `android/app/src/main/java/com/hyzq/boss/ProjectChatUiState.java`
+- Create: `android/app/src/test/java/com/hyzq/boss/ProjectChatUiStateTest.java`
+- Modify: `android/app/src/main/java/com/hyzq/boss/ProjectDetailActivity.java`
+- Modify: `android/app/src/main/java/com/hyzq/boss/BossUi.java`
+
+- [ ] **Step 1: Write the failing test**
+
+```java
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class ProjectChatUiStateTest {
+    @Test
+    public void sendEnabled_requiresTextAndNotBusy() {
+        assertFalse(ProjectChatUiState.canSend("", false));
+        assertFalse(ProjectChatUiState.canSend("   ", false));
+        assertFalse(ProjectChatUiState.canSend("你好", true));
+        assertTrue(ProjectChatUiState.canSend("你好", false));
+    }
+
+    @Test
+    public void shouldAutoScroll_onlyWhenNearBottomOrForced() {
+        assertTrue(ProjectChatUiState.shouldAutoScroll(true, false));
+        assertTrue(ProjectChatUiState.shouldAutoScroll(false, true));
+        assertFalse(ProjectChatUiState.shouldAutoScroll(false, false));
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --tests com.hyzq.boss.ProjectChatUiStateTest --no-daemon
+```
+
+Expected: FAIL with missing `ProjectChatUiState`.
+
+- [ ] **Step 3: Write minimal implementation**
+
+```java
+package com.hyzq.boss;
+
+public final class ProjectChatUiState {
+    private ProjectChatUiState() {}
+
+    public static boolean canSend(String text, boolean sending) {
+        return !sending && text != null && !text.trim().isEmpty();
+    }
+
+    public static boolean shouldAutoScroll(boolean nearBottom, boolean forced) {
+        return nearBottom || forced;
+    }
+}
+```
+
+Then integrate it into `ProjectDetailActivity`:
+
+- disable send button when text empty or request busy
+- show a local pending outgoing bubble immediately after tapping send
+- only auto-scroll on refresh when user was already near bottom or after local send
+
+- [ ] **Step 4: Run tests and compile verification**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --tests com.hyzq.boss.ProjectChatUiStateTest --no-daemon
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android :app:compileDebugJavaWithJavac --no-daemon
+```
+
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+cd /Users/kris/code/boss
+git add android/app/src/main/java/com/hyzq/boss/ProjectChatUiState.java \
+  android/app/src/test/java/com/hyzq/boss/ProjectChatUiStateTest.java \
+  android/app/src/main/java/com/hyzq/boss/ProjectDetailActivity.java \
+  android/app/src/main/java/com/hyzq/boss/BossUi.java
+git commit -m "feat: polish native chat composer feedback"
+```
+
+## Task 2: Add OTA Download Progress and Retry Guidance
+
+**Files:**
+- Create: `android/app/src/main/java/com/hyzq/boss/OtaDownloadStateMapper.java`
+- Create: `android/app/src/test/java/com/hyzq/boss/OtaDownloadStateMapperTest.java`
+- Modify: `android/app/src/main/java/com/hyzq/boss/AboutActivity.java`
+- Modify: `android/app/src/main/java/com/hyzq/boss/BossUi.java`
+
+- [ ] **Step 1: Write the failing test**
+
+```java
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class OtaDownloadStateMapperTest {
+    @Test
+    public void toProgressLabel_formatsKnownProgress() {
+        assertEquals("已下载 50%", OtaDownloadStateMapper.toProgressLabel(50, true));
+    }
+
+    @Test
+    public void toProgressLabel_handlesUnknownProgress() {
+        assertEquals("正在准备下载", OtaDownloadStateMapper.toProgressLabel(0, false));
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --tests com.hyzq.boss.OtaDownloadStateMapperTest --no-daemon
+```
+
+Expected: FAIL with missing `OtaDownloadStateMapper`.
+
+- [ ] **Step 3: Write minimal implementation**
+
+```java
+package com.hyzq.boss;
+
+public final class OtaDownloadStateMapper {
+    private OtaDownloadStateMapper() {}
+
+    public static String toProgressLabel(int percent, boolean hasKnownTotal) {
+        if (!hasKnownTotal) {
+            return "正在准备下载";
+        }
+        return "已下载 " + Math.max(0, Math.min(100, percent)) + "%";
+    }
+}
+```
+
+Then integrate it into `AboutActivity`:
+
+- query `DownloadManager` while download is active
+- render a visible progress row in page content
+- keep a retry action after failed download
+- show install permission guidance row when unknown-source install permission is missing
+
+- [ ] **Step 4: Run tests and compile verification**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --tests com.hyzq.boss.OtaDownloadStateMapperTest --no-daemon
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android :app:compileDebugJavaWithJavac --no-daemon
+```
+
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+cd /Users/kris/code/boss
+git add android/app/src/main/java/com/hyzq/boss/OtaDownloadStateMapper.java \
+  android/app/src/test/java/com/hyzq/boss/OtaDownloadStateMapperTest.java \
+  android/app/src/main/java/com/hyzq/boss/AboutActivity.java \
+  android/app/src/main/java/com/hyzq/boss/BossUi.java
+git commit -m "feat: add native ota progress feedback"
+```
+
+## Task 3: Remember Root Tab and Smooth Root Back Behavior
+
+**Files:**
+- Create: `android/app/src/main/java/com/hyzq/boss/RootTabMemory.java`
+- Create: `android/app/src/test/java/com/hyzq/boss/RootTabMemoryTest.java`
+- Modify: `android/app/src/main/java/com/hyzq/boss/MainActivity.java`
+
+- [ ] **Step 1: Write the failing test**
+
+```java
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+public class RootTabMemoryTest {
+    @Test
+    public void resolveInitialTab_prefersExplicitTab() {
+        assertEquals("devices", RootTabMemory.resolveInitialTab("devices", "me"));
+    }
+
+    @Test
+    public void resolveInitialTab_fallsBackToStoredTab() {
+        assertEquals("me", RootTabMemory.resolveInitialTab(null, "me"));
+    }
+
+    @Test
+    public void resolveInitialTab_defaultsToConversations() {
+        assertEquals("conversations", RootTabMemory.resolveInitialTab(null, null));
+    }
+}
+```
+
+- [ ] **Step 2: Run test to verify it fails**
+
+Run the new unit test target after creating it in the same package:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --tests com.hyzq.boss.RootTabMemoryTest --no-daemon
+```
+
+Expected: FAIL with missing helper.
+
+- [ ] **Step 3: Write minimal implementation**
+
+Implement the helper:
+
+```java
+package com.hyzq.boss;
+
+public final class RootTabMemory {
+    private RootTabMemory() {}
+
+    public static String resolveInitialTab(String explicitTab, String storedTab) {
+        if ("conversations".equals(explicitTab) || "devices".equals(explicitTab) || "me".equals(explicitTab)) {
+            return explicitTab;
+        }
+        if ("conversations".equals(storedTab) || "devices".equals(storedTab) || "me".equals(storedTab)) {
+            return storedTab;
+        }
+        return "conversations";
+    }
+}
+```
+
+Then wire it into `MainActivity` so that:
+
+- last selected root tab is persisted in `SharedPreferences`
+- explicit deep-link tab still wins over stored tab
+- when already at root conversations tab, back key shows a soft toast then moves task to back
+
+- [ ] **Step 4: Run tests and full debug verification**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android testDebugUnitTest --no-daemon
+JAVA_HOME=$(/usr/libexec/java_home) ./android/gradlew -p ./android assembleDebug --no-daemon
+```
+
+Expected: PASS.
+
+- [ ] **Step 5: Commit**
+
+```bash
+cd /Users/kris/code/boss
+git add android/app/src/main/java/com/hyzq/boss/MainActivity.java \
+  android/app/src/main/java/com/hyzq/boss/RootTabMemory.java \
+  android/app/src/test/java/com/hyzq/boss/RootTabMemoryTest.java
+git commit -m "feat: polish native root tab memory"
+```
+
+## Task 4: Verification, Packaging, Deploy, and Docs
+
+**Files:**
+- Modify: `README.md`
+- Modify: `docs/architecture/current_runtime_and_deploy_status_cn.md`
+- Modify: `docs/architecture/api_and_service_inventory_cn.md`
+- Modify: `android/app/build.gradle`
+
+- [ ] **Step 1: Update docs and version**
+
+- bump Android version for the next polish release
+- document chat send feedback, OTA progress, and root tab memory behavior
+
+- [ ] **Step 2: Run local verification**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+npm run lint
+npm run build
+curl -sS http://127.0.0.1:3000/api/health
+curl -sS http://127.0.0.1:4317/health
+JAVA_HOME=$(/usr/libexec/java_home) npm run apk:release
+JAVA_HOME=$(/usr/libexec/java_home) npm run aab:release
+```
+
+- [ ] **Step 3: Deploy and verify**
+
+Run:
+
+```bash
+cd /Users/kris/code/boss
+BOSS_SERVER_PASS='your-password' ./scripts/deploy-server.sh
+"$HOME/.codex/skills/boss-server-debug/scripts/server_ssh.sh" exec "curl -sS http://127.0.0.1:3000/api/health"
+curl -sS https://boss.hyzq.net/api/health
+curl -sS https://boss.hyzq.net/downloads/boss-android-latest.json
+```
+
+- [ ] **Step 4: Commit**
+
+```bash
+cd /Users/kris/code/boss
+git add README.md docs/architecture/current_runtime_and_deploy_status_cn.md \
+  docs/architecture/api_and_service_inventory_cn.md android/app/build.gradle \
+  public/downloads/
+git commit -m "chore: publish native ui phase 2 polish release"
+```
diff --git a/docs/superpowers/specs/2026-03-27-wechat-native-ui-phase2-design.md b/docs/superpowers/specs/2026-03-27-wechat-native-ui-phase2-design.md
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+# WeChat Native UI Phase 2 Design
+
+**日期：** 2026-03-27  
+**范围：** 原生 Android 微信式回退后的第二批细化  
+**前提：** 延续 `2026-03-27-wechat-native-ui-rollback-design.md` 已批准方向，不改一级导航、不改原生路线、不把控制台式信息重新放回主 UI
+
+---
+
+## 1. 目标
+
+这一批只做三个方向的补齐：
+
+1. 聊天页手感更接近常用 IM，而不是“能发消息但交互生硬”
+2. OTA 下载与安装链路给出更明确的原生反馈，而不是只靠系统通知
+3. 根页导航和返回逻辑再收一轮，减少“像功能页、不像 APP”的割裂感
+
+这批不新增新的一级功能，也不改 Boss 的后端技术路线。
+
+## 2. 保持不变的约束
+
+- 一级导航仍然固定为 `会话 / 设备 / 我的`
+- 会话首页仍是微信式简单聊天列表
+- 项目聊天页仍然只保留 `项目目标 / 版本记录` 两个轻入口
+- `运维 / 审计 / 修复 / 线程详情 / 转发` 仍保留深层入口，但不回到主聊天页和一级 `我的`
+- 原生 Android 仍使用 `BossApiClient + Activity + XML`
+- 登录恢复、OTA API、Boss Web 部署链路都保持现有实现
+
+## 3. 设计一：聊天页体验细化
+
+### 3.1 现状问题
+
+- 点击发送后只有整体刷新，用户会感觉“发出去了，但界面没跟手”
+- 发送中没有明确状态，输入框和发送按钮的反馈太弱
+- 每次刷新后直接滚到底，用户如果在看旧消息，会被强制拉走
+
+### 3.2 目标效果
+
+- 发送后立即出现一条本地“发送中”气泡，先给到即时反馈
+- 服务端成功后，再用真实消息列表替换掉临时气泡
+- 如果用户本来就在底部，刷新后继续滚到底
+- 如果用户已经往上翻历史，自动刷新不能把用户强行拉回底部
+- 发送按钮在空输入、发送中这两种状态下要有明确禁用表现
+
+### 3.3 设计取舍
+
+- 不做真正的本地离线消息队列
+- 不做复杂的消息已读/送达双勾状态
+- 只做“发送中 -> 成功刷新”这一层最小原生体验闭环
+
+## 4. 设计二：OTA 原生反馈细化
+
+### 4.1 现状问题
+
+- 现在已经能下载并拉起安装，但主页面上看不到清晰下载进度
+- 下载失败或权限阻塞时，提示不够聚焦
+- 用户回到关于页时，不容易知道“刚才那个下载现在走到哪一步了”
+
+### 4.2 目标效果
+
+- 关于页能显示当前 OTA 下载状态：未开始、下载中、已完成、失败、等待安装授权
+- 下载中能看到百分比或至少看到“已下载 / 总大小”的进度文案
+- 下载失败时可直接重试，不需要用户自己猜该做什么
+- 如果安装未知来源权限没开，界面要明确告诉用户下一步去哪开
+
+### 4.3 设计取舍
+
+- 继续使用系统 `DownloadManager`
+- 不实现后台自定义下载器
+- 不实现增量更新，只优化整包 APK 下载体验
+
+## 5. 设计三：导航细节细化
+
+### 5.1 现状问题
+
+- 根页 tab 虽然已经变成微信式，但重新进 APP 时对用户上次停留页的记忆还不稳定
+- 根页返回虽然不会直接乱跳，但体验还可以更像成熟 APP
+
+### 5.2 目标效果
+
+- 记住用户上次停留的根 tab，下次进 APP 优先回到该 tab
+- 如果外部显式指定入口 tab，仍然以显式入口优先
+- 在根页按返回时，不再像“页面崩掉式退出”；给出更柔和的退后台反馈
+
+### 5.3 设计取舍
+
+- 不做复杂导航栈框架迁移
+- 继续基于现有 `MainActivity` 自己维护 root tab 状态
+
+## 6. 代码边界
+
+这批预计新增少量纯 Java helper，目的是让关键交互可以用单元测试覆盖，而不是把逻辑都埋进 Activity：
+
+- `ProjectChatUiState.java`
+  - 负责“是否自动滚到底”“发送按钮是否可用”“临时发送中消息”的最小映射
+- `OtaDownloadStateMapper.java`
+  - 负责把 `DownloadManager` 查询结果映射成页面文案和状态
+
+活动页主要做接线，不堆业务判断：
+
+- `ProjectDetailActivity.java`
+- `AboutActivity.java`
+- `MainActivity.java`
+
+## 7. 验收标准
+
+1. 聊天页发送消息后，立刻能看到发送中反馈
+2. 聊天页刷新不会在用户查看历史消息时强制跳到底
+3. 关于页能看到 OTA 下载状态和失败重试入口
+4. 未知来源安装权限未开时，页面能给出明确引导
+5. APP 再次打开时，根 tab 能恢复到上次停留位置
+6. 微信式一级 UI 不被破坏，主聊天页仍然只保留 `项目目标 / 版本记录`