🐛 Fix source switching crash & enhance stability (v3.0.4)

### 🐛 Bug Fixes
- Fix random crashes when switching video sources in settings management
- Enhanced VodConfig.setHome() null pointer exception handling
- Improved Fragment lifecycle checks to prevent crashes
- Optimized HistoryDialog source switching safety
- Enhanced thread safety for concurrent loading

### ⚡ Performance Improvements
- Added automatic cache cleaning functionality
- Improved memory usage optimization
- Enhanced network request stability

### 🆕 New Features
- Added comprehensive error handling mechanisms
- Enhanced crash protection functionality
- Improved Fragment state validation

### 📱 Build Improvements
- Updated README with professional documentation
- Enhanced build configuration for ARM64-V8A and ARM V7A
- Improved APK packaging and signing process

app/src/main/res/values-zh-rCN/strings.xml

@@ -171,6 +171,7 @@
     <string name="none">无</string>
     <string name="times">倍</string>
     <string name="lines">行</string>
+    <string name="last_watch">上次播放</string>
 
     <string-array name="select_decode">
         <item>软解</item>
@@ -214,4 +215,10 @@
         <item>选择字幕</item>
     </string-array>
 
+    <string name="source_hint">您还没有添加视频源\n点击下方按钮添加</string>
+    <string name="add_source">添加源</string>
+    <string name="source_hint_setting">添加视频源</string>
+    <string name="source_hint_live">添加直播源</string>
+    <string name="source_hint_wall">添加壁纸源</string>
+
 </resources>