feat: improve Linux bootable USB stability and user experience

- Enhanced Live USB environment detection and support
- Added troubleshooting guide (TROUBLESHOOTING.md)
- Added installation test script (test-installation.sh)
- Improved error handling in PowerShell scripts
- Better network retry logic for downloads
- Enhanced desktop integration for Live environments
- Added detailed improvements summary (IMPROVEMENTS_SUMMARY.md)
- Updated README with troubleshooting links

Key improvements:
1. Auto-detection of Live USB environment (boot=casper)
2. Additional dependency installation for Live environments
3. Network download retry mechanism (3 attempts)
4. Smart browser opening with fallback instructions
5. Comprehensive installation validation script
6. Detailed fault diagnosis and recovery guide

bootable/linux-setup/setup-openclaw.sh

@@ -33,7 +33,14 @@ REAL_HOME=$(eval echo "~$REAL_USER")
 # ── 2. Install system dependencies ──
 echo "[1/9] Installing system dependencies..."
 apt-get update -qq
-apt-get install -y -qq curl xdg-utils > /dev/null 2>&1
+
+# Live USB环境需要额外的包
+if grep -q "boot=casper" /proc/cmdline 2>/dev/null; then
+    echo "      Detected Live USB environment, installing additional packages..."
+    apt-get install -y -qq curl xdg-utils gvfs-bin libgtk-3-0 libnotify4 libnss3 libxss1 libxtst6 xdg-utils libatspi2.0-0 libuuid1 libgbm1 libasound2 > /dev/null 2>&1
+else
+    apt-get install -y -qq curl xdg-utils > /dev/null 2>&1
+fi
 echo "      Done."
 
 # ── 3. Create install directory ──
@@ -132,6 +139,21 @@ DESKTOP_FILE="$REAL_HOME/Desktop/openclaw.desktop"
 APPS_DIR="$REAL_HOME/.local/share/applications"
 mkdir -p "$APPS_DIR"
 
+# 检查是否是Live环境，如果是则创建更简单的启动脚本
+if grep -q "boot=casper" /proc/cmdline 2>/dev/null; then
+    echo "      Live USB detected, creating simplified launcher..."
+    # 创建直接启动脚本
+    cat > "$REAL_HOME/Desktop/Start-U-Claw.sh" << 'LAUNCHEREOF'
+#!/bin/bash
+echo "Starting U-Claw AI Assistant..."
+cd /opt/u-claw
+bash start-openclaw.sh
+LAUNCHEREOF
+    chmod +x "$REAL_HOME/Desktop/Start-U-Claw.sh"
+    chown "$REAL_USER:$REAL_USER" "$REAL_HOME/Desktop/Start-U-Claw.sh"
+fi
+
+# 仍然创建标准的.desktop文件
 cat > "$DESKTOP_FILE" << 'DESKTOPEOF'
 [Desktop Entry]
 Name=U-Claw AI Assistant
@@ -140,6 +162,7 @@ Exec=/opt/u-claw/start-openclaw.sh
 Terminal=true
 Type=Application
 Categories=Utility;
+Icon=utilities-terminal
 DESKTOPEOF
 
 cp "$DESKTOP_FILE" "$APPS_DIR/openclaw.desktop"
@@ -177,5 +200,19 @@ echo ""
 echo "  To start:  Double-click 'U-Claw AI Assistant' on desktop"
 echo "         or: bash $INSTALL_DIR/start-openclaw.sh"
 echo ""
+
+# 复制测试脚本
+if [[ -f "$SCRIPT_DIR/test-installation.sh" ]]; then
+    cp "$SCRIPT_DIR/test-installation.sh" "$INSTALL_DIR/test-installation.sh"
+    chmod +x "$INSTALL_DIR/test-installation.sh"
+    echo "  Test script: bash $INSTALL_DIR/test-installation.sh"
+    echo ""
+fi
+
+# 运行快速测试
+echo "Running quick installation test..."
+if [[ -f "$SCRIPT_DIR/test-installation.sh" ]]; then
+    bash "$SCRIPT_DIR/test-installation.sh" | tail -20
+fi
 echo "  First time? Configure your AI model in the browser after startup."
 echo "============================================"