feat: 增加失败历史详情渲染功能，展示失败反馈信息

ccw/src/templates/dashboard-css/32-issue-manager.css

@@ -331,6 +331,79 @@
   word-break: break-word;
 }
 
+/* Failure History Detail */
+.failure-history-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.failure-history-item {
+  padding: 0.75rem;
+  background: hsl(var(--destructive) / 0.06);
+  border: 1px solid hsl(var(--destructive) / 0.15);
+  border-radius: 0.5rem;
+}
+
+.failure-history-header {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  margin-bottom: 0.5rem;
+  color: hsl(var(--destructive));
+}
+
+.failure-history-count {
+  font-size: 0.875rem;
+  font-weight: 500;
+}
+
+.failure-history-timestamp {
+  margin-left: auto;
+}
+
+.failure-history-content {
+  display: flex;
+  flex-direction: column;
+  gap: 0.375rem;
+  padding-left: 0.5rem;
+}
+
+.failure-history-task,
+.failure-history-error {
+  display: flex;
+  align-items: center;
+  gap: 0.375rem;
+}
+
+.failure-history-message pre {
+  margin: 0;
+  white-space: pre-wrap;
+}
+
+.failure-history-stacktrace {
+  margin-top: 0.375rem;
+}
+
+.failure-history-stacktrace summary {
+  margin-bottom: 0.25rem;
+}
+
+.failure-history-stacktrace pre {
+  margin: 0;
+  background: hsl(var(--background));
+  padding: 0.5rem;
+  border-radius: 0.25rem;
+  border: 1px solid hsl(var(--border));
+}
+
+.detail-label-sm {
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: hsl(var(--muted-foreground));
+  min-width: 60px;
+}
+
 /* Priority Badges */
 .issue-priority {
   display: inline-flex;

ccw/src/templates/dashboard-js/views/issue-manager.js

@@ -431,8 +431,6 @@ function renderIssueCard(issue) {
           <span>Archived on ${archivedDate}</span>
         </div>
       ` : ''}
-
-      ${renderFailureInfo(issue)}
     </div>
   `;
 }
@@ -479,6 +477,72 @@ function renderFailureInfo(issue) {
   `;
 }
 
+function renderFailureHistoryDetail(issue) {
+  // Check if issue has failure feedback
+  if (!issue.feedback || issue.feedback.length === 0) {
+    return '';
+  }
+
+  // Extract failure feedbacks
+  const failures = issue.feedback.filter(f => f.type === 'failure' && f.stage === 'execute');
+  if (failures.length === 0) {
+    return '';
+  }
+
+  return `
+    <div class="detail-section">
+      <label class="detail-label">${t('issues.failureHistory') || 'Failure History'} (${failures.length})</label>
+      <div class="failure-history-list">
+        ${failures.map((failure, index) => {
+          let failureDetail;
+          try {
+            failureDetail = JSON.parse(failure.content);
+          } catch {
+            return '';
+          }
+
+          const errorMessage = failureDetail.message || 'Unknown error';
+          const errorType = failureDetail.error_type || 'error';
+          const taskId = failureDetail.task_id;
+          const timestamp = failure.created_at ? new Date(failure.created_at).toLocaleString() : 'Unknown time';
+
+          return `
+            <div class="failure-history-item">
+              <div class="failure-history-header">
+                <i data-lucide="alert-circle" class="w-4 h-4"></i>
+                <span class="failure-history-count">Failure ${index + 1}</span>
+                <span class="failure-history-timestamp text-xs text-muted-foreground">${timestamp}</span>
+              </div>
+              <div class="failure-history-content">
+                ${taskId ? `
+                  <div class="failure-history-task">
+                    <span class="detail-label-sm">Task:</span>
+                    <span class="font-mono text-xs">${taskId}</span>
+                  </div>
+                ` : ''}
+                <div class="failure-history-error">
+                  <span class="detail-label-sm">Error Type:</span>
+                  <span class="font-mono text-xs">${errorType}</span>
+                </div>
+                <div class="failure-history-message">
+                  <span class="detail-label-sm">Message:</span>
+                  <pre class="detail-pre text-xs">${escapeHtml(errorMessage)}</pre>
+                </div>
+                ${failureDetail.stack_trace ? `
+                  <details class="failure-history-stacktrace">
+                    <summary class="cursor-pointer text-xs text-muted-foreground">Show Stack Trace</summary>
+                    <pre class="detail-pre text-xs mt-1 max-h-60 overflow-auto">${escapeHtml(failureDetail.stack_trace)}</pre>
+                  </details>
+                ` : ''}
+              </div>
+            </div>
+          `;
+        }).join('')}
+      </div>
+    </div>
+  `;
+}
+
 // Helper: Truncate text to max length
 function truncateText(text, maxLength) {
   if (!text || text.length <= maxLength) return text;
@@ -1691,6 +1755,9 @@ function renderIssueDetailPanel(issue) {
         </div>
       </div>
 
+      <!-- Failure History -->
+      ${renderFailureHistoryDetail(issue)}
+
       <!-- Solutions -->
       <div class="detail-section">
         <label class="detail-label">${t('issues.solutions') || 'Solutions'} (${issue.solutions?.length || 0})</label>