Add v2 sandbox implementation with new API routes and sandbox library

app/api/run-command-v2/route.ts

@@ -0,0 +1,46 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { SandboxProvider } from '@/lib/sandbox/types';
+
+// Get active sandbox provider from global state
+declare global {
+  var activeSandboxProvider: SandboxProvider | null;
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const { command } = await request.json();
+    
+    if (!command) {
+      return NextResponse.json({ 
+        success: false, 
+        error: 'Command is required' 
+      }, { status: 400 });
+    }
+    
+    if (!global.activeSandboxProvider) {
+      return NextResponse.json({ 
+        success: false, 
+        error: 'No active sandbox' 
+      }, { status: 400 });
+    }
+    
+    console.log(`[run-command-v2] Executing: ${command}`);
+    
+    const result = await global.activeSandboxProvider.runCommand(command);
+    
+    return NextResponse.json({
+      success: result.success,
+      output: result.stdout,
+      error: result.stderr,
+      exitCode: result.exitCode,
+      message: result.success ? 'Command executed successfully' : 'Command failed'
+    });
+    
+  } catch (error) {
+    console.error('[run-command-v2] Error:', error);
+    return NextResponse.json({ 
+      success: false, 
+      error: (error as Error).message 
+    }, { status: 500 });
+  }
+}