fix: decouple AI completion from history save failures and improve history API errors

Co-authored-by: Cursor <cursoragent@cursor.com>

components/result-ai.tsx

@@ -11,6 +11,7 @@ function ResultAI({
   isLoading,
   onCompletion,
   error,
+  warning,
   panel = false,
   emptyHint = "完成左侧填写并起卦/排盘后，点击「AI 解读」",
   downloadFilename,
@@ -20,6 +21,7 @@ function ResultAI({
   isLoading: boolean;
   onCompletion: () => void;
   error: string;
+  warning?: string;
   panel?: boolean;
   emptyHint?: string;
   downloadFilename?: string;
@@ -94,9 +96,17 @@ function ResultAI({
             <p className="mt-1 whitespace-pre-wrap">{error}</p>
           </div>
         ) : completion ? (
-          <Markdown className="prose max-w-none text-sm dark:prose-invert prose-p:leading-relaxed">
-            {completion}
-          </Markdown>
+          <>
+            {warning && (
+              <div className="mb-3 rounded-md border border-amber-500/40 bg-amber-500/10 px-3 py-2 text-sm text-amber-700 dark:text-amber-300">
+                <p className="font-medium">解读已完成，但历史未保存</p>
+                <p className="mt-1 whitespace-pre-wrap">{warning}</p>
+              </div>
+            )}
+            <Markdown className="prose max-w-none text-sm dark:prose-invert prose-p:leading-relaxed">
+              {completion}
+            </Markdown>
+          </>
         ) : isLoading ? (
           <p className="text-sm text-muted-foreground">正在等待 AI 响应...</p>
         ) : (