diff --git a/packages/node-runtime/src/ai/agent/__tests__/core.test.ts b/packages/node-runtime/src/ai/agent/__tests__/core.test.ts
index b5bbdb9e..9284570a 100644
--- a/packages/node-runtime/src/ai/agent/__tests__/core.test.ts
+++ b/packages/node-runtime/src/ai/agent/__tests__/core.test.ts
@@ -243,8 +243,9 @@ describe('runAgentCore runtime contract', () => {
       })
     )
     assert.equal(result.error, undefined)
-    assert.equal(captured?.messages[0].content[0].type, 'text')
-    assert.equal(captured?.messages[0].content[0].text, historyText)
+    const firstBlock = captured?.messages[0].content[0]
+    assert.ok(typeof firstBlock === 'object' && firstBlock.type === 'text')
+    assert.equal(firstBlock.text, historyText)
     assert.equal(outputBudget, 2048, 'Preserve the configured output budget when the history and answer both fit')
   })
 
diff --git a/packages/node-runtime/src/logging/app-logger.ts b/packages/node-runtime/src/logging/app-logger.ts
index b6893ae6..99627cf0 100644
--- a/packages/node-runtime/src/logging/app-logger.ts
+++ b/packages/node-runtime/src/logging/app-logger.ts
@@ -10,7 +10,7 @@
 
 import * as fs from 'fs'
 import * as path from 'path'
-import { extractErrorInfo, extractErrorStack } from '../ai/ai-logger'
+import { extractErrorInfo } from '../ai/ai-logger'
 
 type LogLevel = 'DEBUG' | 'INFO' | 'WARN' | 'ERROR'
 
@@ -92,7 +92,7 @@ function formatData(data: unknown): string {
   if (data === undefined) return ''
   if (data instanceof Error) {
     const info = extractErrorInfo(data)
-    const stack = extractErrorStack(data)
+    const stack = data.stack
     return JSON.stringify(info) + (stack ? `\n${stack}` : '')
   }
   if (typeof data === 'string') return data
diff --git a/src/components/common/Sidebar.vue b/src/components/common/Sidebar.vue
index 4707102d..e6bfc12d 100644
--- a/src/components/common/Sidebar.vue
+++ b/src/components/common/Sidebar.vue
@@ -611,7 +611,12 @@ function getAvatarColorClass(session: AnalysisSession, isActive: boolean) {
         >
           <template v-if="!isCollapsed">
             <p class="text-sm text-gray-600 dark:text-gray-300">{{ t('layout.sessionLoadFailed') }}</p>
-            <p v-if="loadError" class="mt-1 line-clamp-2 text-xs text-gray-400">{{ loadError }}</p>
+            <p
+              v-if="loadError"
+              class="mt-2 text-left text-xs leading-relaxed break-all whitespace-pre-wrap text-gray-400 select-text"
+            >
+              {{ loadError }}
+            </p>
             <UButton size="xs" variant="soft" class="mt-3" @click="sessionStore.loadSessions()">
               {{ t('common.retry') }}
             </UButton>