feat: 增加AI回复手动重试

ai_knowledge_base_v2/apps/user-client/src/styles.css

@@ -1400,6 +1400,51 @@ textarea:focus-visible {
 .generation-state span:nth-child(2) { animation-delay: 0.14s; }
 .generation-state span:nth-child(3) { animation-delay: 0.28s; margin-right: 4px; }
 
+.message-error-state {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 9px 12px;
+  margin-top: 10px;
+  padding: 10px 11px;
+  border: 1px solid #ead5cf;
+  border-radius: 11px;
+  background: #fff8f5;
+  color: #8a5043;
+  font-size: 13px;
+  line-height: 1.5;
+}
+
+.message-error-state span {
+  flex: 1 1 190px;
+}
+
+.message-error-state button {
+  min-height: 32px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  padding: 0 11px;
+  border: 1px solid #bf7765;
+  border-radius: 9px;
+  background: #ffffff;
+  color: #8a4434;
+  font: inherit;
+  font-weight: 700;
+  white-space: nowrap;
+  cursor: pointer;
+}
+
+.message-error-state button:hover {
+  background: #fff0eb;
+}
+
+.message-error-state button:disabled {
+  cursor: not-allowed;
+  opacity: 0.55;
+}
+
 @keyframes generation-pulse {
   0%, 70%, 100% { opacity: 0.25; transform: translateY(0); }
   35% { opacity: 1; transform: translateY(-2px); }