feat: OpenCode-style session management implementation

services/claude-service.js

@@ -446,11 +446,17 @@ class ClaudeCodeService extends EventEmitter {
   listSessions() {
     return Array.from(this.sessions.values()).map(session => {
       const metadata = this.calculateSessionMetadata(session);
+
+      // FIX: Only mark as running if process is actually alive
+      const isRunning = session.status === 'running' &&
+                        session.process &&
+                        !session.process.killed;
+
       return {
         id: session.id,
         pid: session.pid,
         workingDir: session.workingDir,
-        status: session.status,
+        status: isRunning ? 'running' : 'stopped',
         createdAt: session.createdAt,
         lastActivity: session.lastActivity,
         metadata: session.metadata,