fix(agent): scope instance list to requesting user (multi-user isolation)

GET /api/v1/agent/instances was returning all instances regardless of user.
Now decodes JWT: non-admin users only see their own instances; admins see all.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/services/agent-service/src/interfaces/rest/controllers/agent-instance.controller.ts

@@ -6,9 +6,11 @@ import {
   Delete,
   Body,
   Param,
+  Req,
   NotFoundException,
   BadRequestException,
 } from '@nestjs/common';
+import { Request } from 'express';
 import * as crypto from 'crypto';
 import { AgentInstanceRepository } from '../../../infrastructure/repositories/agent-instance.repository';
 import { AgentInstanceDeployService } from '../../../infrastructure/services/agent-instance-deploy.service';
@@ -28,9 +30,17 @@ export class AgentInstanceController {
   }
 
   @Get()
-  async list() {
+  async list(@Req() req: Request) {
+    const jwt = this.decodeJwt(req.headers?.['authorization'] as string | undefined);
+    const userId = jwt?.sub;
+    const roles: string[] = jwt?.roles ?? [];
+    // Admins see all instances; regular users only see their own
+    if (!userId || roles.includes('admin')) {
       return this.instanceRepo.findAll();
     }
+    const instances = await this.instanceRepo.findByUserId(userId);
+    return instances.map((inst) => this.sanitize(inst));
+  }
 
   @Get('user/:userId')
   async listByUser(@Param('userId') userId: string) {
@@ -210,4 +220,14 @@ export class AgentInstanceController {
     const { openclawToken, openclawTokenIv, ...safe } = inst;
     return { ...safe, hasToken: !!openclawToken };
   }
+
+  private decodeJwt(authHeader: string | undefined): Record<string, any> | null {
+    if (!authHeader?.startsWith('Bearer ')) return null;
+    try {
+      const payload = authHeader.slice(7).split('.')[1];
+      return JSON.parse(Buffer.from(payload, 'base64url').toString('utf8'));
+    } catch {
+      return null;
+    }
+  }
 }