fix: wire agent group selection through to simulation start

Step 2 -> Step 3 -> Simulation API now passes selected_agent_ids.
Backend filters reddit_profiles.json and twitter_profiles.csv
to only include selected agents before starting simulation.

Flow: Step2 checkboxes -> emit('next-step', {selectedAgentIds}) ->
router query -> Step3 props -> startSimulation API -> filter profiles

backend/app/api/simulation.py

@@ -1448,6 +1448,41 @@ def generate_profiles():
 
 # ============== 模拟运行控制接口 ==============
 
+def _filter_simulation_agents(simulation_id: str, selected_agent_ids: list):
+    """
+    Filter simulation profiles to only include selected agents.
+    Modifies the profile files in-place before simulation starts.
+    """
+    import csv
+    sim_dir = os.path.join(Config.OASIS_SIMULATION_DATA_DIR, simulation_id)
+    
+    # Filter Reddit profiles (JSON)
+    reddit_path = os.path.join(sim_dir, 'reddit_profiles.json')
+    if os.path.exists(reddit_path):
+        with open(reddit_path, 'r', encoding='utf-8') as f:
+            profiles = json.load(f)
+        
+        if isinstance(profiles, list):
+            filtered = [p for i, p in enumerate(profiles) if i in selected_agent_ids]
+            with open(reddit_path, 'w', encoding='utf-8') as f:
+                json.dump(filtered, f, ensure_ascii=False, indent=2)
+            logger.info(f"Reddit profiles: {len(profiles)} -> {len(filtered)}")
+    
+    # Filter Twitter profiles (CSV)
+    twitter_path = os.path.join(sim_dir, 'twitter_profiles.csv')
+    if os.path.exists(twitter_path):
+        with open(twitter_path, 'r', encoding='utf-8') as f:
+            reader = csv.DictReader(f)
+            rows = list(reader)
+            fieldnames = reader.fieldnames
+        
+        filtered = [r for i, r in enumerate(rows) if i in selected_agent_ids]
+        with open(twitter_path, 'w', encoding='utf-8', newline='') as f:
+            writer = csv.DictWriter(f, fieldnames=fieldnames)
+            writer.writeheader()
+            writer.writerows(filtered)
+        logger.info(f"Twitter profiles: {len(rows)} -> {len(filtered)}")
+
 @simulation_bp.route('/start', methods=['POST'])
 def start_simulation():
     """
@@ -1503,6 +1538,7 @@ def start_simulation():
         max_rounds = data.get('max_rounds')  # 可选：最大模拟轮数
         enable_graph_memory_update = data.get('enable_graph_memory_update', False)  # 可选：是否启用图谱记忆更新
         force = data.get('force', False)  # 可选：强制重新开始
+        selected_agent_ids = data.get('selected_agent_ids')  # 可选：选中的Agent ID列表
 
         # 验证 max_rounds 参数
         if max_rounds is not None:
@@ -1600,6 +1636,11 @@ def start_simulation():
             
             logger.info(f"启用图谱记忆更新: simulation_id={simulation_id}, graph_id={graph_id}")
         
+        # Filter agents if selected_agent_ids provided
+        if selected_agent_ids:
+            logger.info(f"Filtering agents: selected {len(selected_agent_ids)} agents")
+            _filter_simulation_agents(simulation_id, selected_agent_ids)
+        
         # 启动模拟
         run_state = SimulationRunner.start_simulation(
             simulation_id=simulation_id,

frontend/src/components/Step2EnvSetup.vue

@@ -834,6 +834,12 @@ const handleStartSimulation = () => {
     addLog(t('log.startSimAutoRounds', { rounds: autoGeneratedRounds.value }))
   }
   
+  // Pass selected agent IDs (filtered by group checkboxes)
+  params.selectedAgentIds = getSelectedAgentIds()
+  if (agentGroups.value.length > 0) {
+    addLog(`✅ ส่ง ${params.selectedAgentIds.length} agents ไปขั้นตอนถัดไป`)
+  }
+  
   emit('next-step', params)
 }
 

frontend/src/components/Step3Simulation.vue

@@ -301,7 +301,8 @@ const { t } = useI18n()
 
 const props = defineProps({
   simulationId: String,
-  maxRounds: Number, // 从Step2传入的最大轮数
+  maxRounds: Number,
+  selectedAgentIds: Array, // Agent IDs selected from Step 2 grouping // 从Step2传入的最大轮数
   minutesPerRound: {
     type: Number,
     default: 30 // 默认每轮30分钟
@@ -407,6 +408,12 @@ const doStartSimulation = async () => {
       addLog(t('log.setMaxRounds', { rounds: props.maxRounds }))
     }
     
+    // Pass selected agent IDs from Step 2 grouping
+    if (props.selectedAgentIds && props.selectedAgentIds.length > 0) {
+      params.selected_agent_ids = props.selectedAgentIds
+      addLog(`✅ ใช้ ${props.selectedAgentIds.length} agents ที่เลือก`)
+    }
+    
     addLog(t('log.graphMemoryUpdateEnabled'))
     
     const res = await startSimulation(params)

frontend/src/views/SimulationRunView.vue

@@ -54,6 +54,7 @@
         <Step3Simulation
           :simulationId="currentSimulationId"
           :maxRounds="maxRounds"
+          :selectedAgentIds="selectedAgentIds"
           :minutesPerRound="minutesPerRound"
           :projectData="projectData"
           :graphData="graphData"
@@ -94,6 +95,7 @@ const viewMode = ref('split')
 const currentSimulationId = ref(route.params.simulationId)
 // 直接在初始化时从 query 参数获取 maxRounds，确保子组件能立即获取到值
 const maxRounds = ref(route.query.maxRounds ? parseInt(route.query.maxRounds) : null)
+const selectedAgentIds = ref(route.query.selectedAgentIds ? route.query.selectedAgentIds.split(',').map(Number) : null)
 const minutesPerRound = ref(30) // 默认每轮30分钟
 const projectData = ref(null)
 const graphData = ref(null)

frontend/src/views/SimulationView.vue

@@ -167,8 +167,15 @@ const handleNextStep = (params = {}) => {
   }
   
   // 如果有自定义轮数，通过 query 参数传递
+  const query = {}
   if (params.maxRounds) {
-    routeParams.query = { maxRounds: params.maxRounds }
+    query.maxRounds = params.maxRounds
+  }
+  if (params.selectedAgentIds && params.selectedAgentIds.length > 0) {
+    query.selectedAgentIds = params.selectedAgentIds.join(',')
+  }
+  if (Object.keys(query).length > 0) {
+    routeParams.query = query
   }
   
   // 跳转到 Step 3 页面