diff --git a/backend/app/models/project.py b/backend/app/models/project.py
index e7df539a..f5dad2e4 100644
--- a/backend/app/models/project.py
+++ b/backend/app/models/project.py
@@ -242,8 +242,43 @@ class ProjectManager:
 
     @classmethod
     def _to_dict(cls, proj: "ProjectModel") -> Dict[str, Any]:
+        import os, json as _json
         ontology = cls.get_ontology(proj.id)
         graph_external_id = cls.get_latest_graph_external_id(proj.id)
+
+        # Find the latest simulation for this project by scanning state.json files
+        last_simulation_id = None
+        last_report_id = None
+        sim_base = Config.OASIS_SIMULATION_DATA_DIR
+        if os.path.isdir(sim_base):
+            candidates = []
+            for entry in os.scandir(sim_base):
+                if not entry.is_dir():
+                    continue
+                state_path = os.path.join(entry.path, "state.json")
+                if not os.path.exists(state_path):
+                    continue
+                try:
+                    with open(state_path, encoding="utf-8") as f:
+                        state = _json.load(f)
+                    if state.get("project_id") == proj.id:
+                        candidates.append((state.get("updated_at", ""), state.get("simulation_id")))
+                except Exception:
+                    pass
+            if candidates:
+                candidates.sort(reverse=True)
+                last_simulation_id = candidates[0][1]
+
+        # Find latest report for that simulation
+        if last_simulation_id:
+            from ..services.report_agent import ReportManager
+            try:
+                report = ReportManager.get_report_by_simulation(last_simulation_id)
+                if report:
+                    last_report_id = report.report_id
+            except Exception:
+                pass
+
         return {
             "id": proj.id,
             "project_id": proj.id,
@@ -262,4 +297,6 @@ class ProjectManager:
             "graph_id": graph_external_id,
             "graph_build_task_id": None,
             "error": None,
+            "last_simulation_id": last_simulation_id,
+            "last_report_id": last_report_id,
         }
diff --git a/frontend/src/api/report.js b/frontend/src/api/report.js
index 0c340ccc..a4b4150e 100644
--- a/frontend/src/api/report.js
+++ b/frontend/src/api/report.js
@@ -50,3 +50,11 @@ export const chatWithReport = (data) => {
   return requestWithRetry(() => service.post('/api/report/chat', data), 3, 1000)
 }
 
+/**
+ * Get report by simulation ID
+ * @param {string} simulationId
+ */
+export const getReportBySimulation = (simulationId) => {
+  return service.get(`/api/report/by-simulation/${simulationId}`)
+}
+
diff --git a/frontend/src/components/HistoryDatabase.vue b/frontend/src/components/HistoryDatabase.vue
index 19bf4502..1e022baa 100644
--- a/frontend/src/components/HistoryDatabase.vue
+++ b/frontend/src/components/HistoryDatabase.vue
@@ -44,7 +44,8 @@
               :title="$t('history.envSetup')"
             >◈</span>
             <span
-              class="status-icon unavailable"
+              class="status-icon"
+              :class="{ available: project.last_report_id || project.last_simulation_id, unavailable: !project.last_report_id && !project.last_simulation_id }"
               :title="$t('history.analysisReport')"
             >◆</span>
           </div>
@@ -173,7 +174,7 @@
               <button
                 class="modal-btn btn-report"
                 @click="goToReport"
-                :disabled="true"
+                :disabled="!selectedProject.last_report_id && !selectedProject.last_simulation_id"
               >
                 <span class="btn-step">Step4</span>
                 <span class="btn-icon">◆</span>
@@ -196,6 +197,7 @@ import { ref, computed, onMounted, onUnmounted, onActivated, watch, nextTick } f
 import { useRouter, useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { listProjects } from '../api/graph'
+import { getReportBySimulation } from '../api/report'
 
 const router = useRouter()
 const route = useRoute()
@@ -427,8 +429,26 @@ const goToSimulation = () => {
 }
 
 // 导航到分析报告页面（Report）
-const goToReport = () => {
-  // Report not yet implemented in F1-1
+const goToReport = async () => {
+  if (!selectedProject.value) return
+
+  // Use known report_id if available
+  let reportId = selectedProject.value.last_report_id
+
+  // Otherwise look it up by simulation_id
+  if (!reportId && selectedProject.value.last_simulation_id) {
+    try {
+      const res = await getReportBySimulation(selectedProject.value.last_simulation_id)
+      reportId = res?.data?.report_id
+    } catch {
+      // no report found
+    }
+  }
+
+  if (reportId) {
+    closeModal()
+    router.push({ name: 'Interaction', params: { reportId } })
+  }
 }
 
 // 加载历史项目