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

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

components/modes/bazi-form.tsx

@@ -16,7 +16,7 @@ import RegionSelect, {
 } from "@/components/shared/region-select";
 import { calculateBazi, type BaziChart } from "@/lib/calc/bazi";
 import { streamAiCompletion } from "@/lib/ai/client-stream";
-import { saveHistoryEntry } from "@/lib/history/storage";
+import { saveHistoryEntrySafe } from "@/lib/history/storage";
 
 export default function BaziForm() {
   const [date, setDate] = useState(todaySolarYmd());
@@ -29,6 +29,7 @@ export default function BaziForm() {
   const [chart, setChart] = useState<BaziChart | null>(null);
   const [completion, setCompletion] = useState("");
   const [error, setError] = useState("");
+  const [warning, setWarning] = useState("");
   const [isLoading, setIsLoading] = useState(false);
 
   const location = useRegionLocation(provinceCode, cityCode);
@@ -77,6 +78,7 @@ export default function BaziForm() {
     }
 
     setError("");
+    setWarning("");
     setCompletion("");
     setIsLoading(true);
 
@@ -92,7 +94,7 @@ export default function BaziForm() {
         },
         setCompletion,
       );
-      await saveHistoryEntry({
+      const saveResult = await saveHistoryEntrySafe({
         mode: "bazi",
         title: "生辰八字解读",
         question,
@@ -115,6 +117,9 @@ export default function BaziForm() {
           四柱: `${activeChart.pillars.year.ganZhi} ${activeChart.pillars.month.ganZhi} ${activeChart.pillars.day.ganZhi} ${activeChart.pillars.time.ganZhi}`,
         },
       });
+      if (!saveResult.ok) {
+        setWarning(saveResult.error);
+      }
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err));
     } finally {
@@ -137,6 +142,7 @@ export default function BaziForm() {
           isLoading={isLoading}
           onCompletion={handleAnalyze}
           error={error}
+          warning={warning}
           emptyHint="排盘后点击「AI 测算」获取解读"
           downloadFilename={completion ? "生辰八字解读.md" : undefined}
           downloadPreamble={downloadPreamble}