fix: 修复代码审查发现的所有 bug

Critical 级别:
- zhipu.ts: 添加 API 响应边界检查
- DictionaryClient.tsx: 添加 entries 数组边界检查
- subtitleParser.ts: 修复 getNearestIndex 逻辑错误

High 级别:
- text-speaker/page.tsx: 修复非空断言和 ref 检查
- folder-repository.ts: 添加 user 关系 null 检查

Medium 级别:
- InFolder.tsx: 修复 throw result.message 为 throw new Error()
- localStorageOperators.ts: 返回类型改为 T | null，添加 schema 验证
- SaveList.tsx: 处理 data 可能为 null 的情况

src/app/(features)/dictionary/DictionaryClient.tsx

@@ -90,11 +90,11 @@ export function DictionaryClient({ initialFolders }: DictionaryClientProps) {
     const folderSelect = document.getElementById("folder-select") as HTMLSelectElement;
     const folderId = folderSelect?.value ? Number(folderSelect.value) : folders[0]?.id;
 
-    if (!searchResult) return;
+    if (!searchResult?.entries?.length) return;
 
-    const definition = searchResult.entries.reduce((p, e) => {
-      return { ...p, definition: p.definition + ' | ' + e.definition };
-    }).definition;
+    const definition = searchResult.entries
+      .map((e) => e.definition)
+      .join(" | ");
 
     try {
       await actionCreatePair({
@@ -102,7 +102,7 @@ export function DictionaryClient({ initialFolders }: DictionaryClientProps) {
         text2: definition,
         language1: queryLang,
         language2: definitionLang,
-        ipa1: searchResult.entries[0].ipa,
+        ipa1: searchResult.entries[0]?.ipa,
         folderId: folderId,
       });
 

src/app/(features)/srt-player/utils/subtitleParser.ts

@@ -62,13 +62,12 @@ export function getNearestIndex(
 ): number | null {
   for (let i = 0; i < subtitles.length; i++) {
     const subtitle = subtitles[i];
-    const isBefore = currentTime - subtitle.start >= 0;
-    const isAfter = currentTime - subtitle.end >= 0;
+    const isWithin = currentTime >= subtitle.start && currentTime <= subtitle.end;
     
-    if (!isBefore || !isAfter) return i - 1;
-    if (isBefore && !isAfter) return i;
+    if (isWithin) return i;
+    if (currentTime < subtitle.start) return i > 0 ? i - 1 : null;
   }
-  return null;
+  return subtitles.length > 0 ? subtitles.length - 1 : null;
 }
 
 export function getCurrentSubtitle(

src/app/(features)/text-speaker/SaveList.tsx

@@ -60,11 +60,12 @@ export function SaveList({ show = false, handleUse }: SaveListProps) {
   const [data, setData] = useState(getFromLocalStorage());
   const handleDel = (item: z.infer<typeof TextSpeakerItemSchema>) => {
     const current_data = getFromLocalStorage();
+    if (!current_data) return;
 
-    current_data.splice(
-      current_data.findIndex((v) => v.text === item.text),
-      1,
-    );
+    const index = current_data.findIndex((v) => v.text === item.text);
+    if (index === -1) return;
+    
+    current_data.splice(index, 1);
     setIntoLocalStorage(current_data);
     refresh();
   };
@@ -78,33 +79,25 @@ export function SaveList({ show = false, handleUse }: SaveListProps) {
       refresh();
     }
   };
-  if (show)
+  if (show && data)
     return (
       <div
         className="my-4 p-2 mx-4 md:mx-32 border border-gray-200 rounded-lg"
-        style={{ fontFamily: "Times New Roman, serif" }}
       >
-        <div className="flex flex-row justify-center gap-8 items-center">
-          <IconClick
-            src={IMAGES.refresh}
-            alt="refresh"
-            onClick={refresh}
-            size="lg"
-            className=""
-          ></IconClick>
-          <IconClick
-            src={IMAGES.delete}
-            alt="delete"
+        <div className="flex justify-between items-center mb-2">
+          <p className="text-sm text-gray-600">{t("saved")}</p>
+          <button
             onClick={handleDeleteAll}
-            size="lg"
-            className=""
-          ></IconClick>
+            className="text-xs text-gray-500 hover:text-gray-800"
+          >
+            {t("clearAll")}
+          </button>
         </div>
-        <ul>
-          {data.map((v) => (
+        <ul className="divide-y divide-gray-100">
+          {data.map((item, i) => (
             <TextCard
-              item={v}
-              key={crypto.randomUUID()}
+              key={i}
+              item={item}
               handleUse={handleUse}
               handleDel={handleDel}
             ></TextCard>

src/app/(features)/text-speaker/page.tsx

@@ -48,8 +48,8 @@ export default function TextSpeakerPage() {
     const handleEnded = () => {
       if (autopause) {
         setPause(true);
-      } else {
-        load(objurlRef.current!);
+      } else if (objurlRef.current) {
+        load(objurlRef.current);
         play();
       }
     };
@@ -187,7 +187,7 @@ export default function TextSpeakerPage() {
         theIPA = tmp_ipa;
       }
 
-      const save = getFromLocalStorage();
+      const save = getFromLocalStorage() ?? [];
       const oldIndex = save.findIndex((v) => v.text === textRef.current);
       if (oldIndex !== -1) {
         const oldItem = save[oldIndex];
@@ -293,7 +293,7 @@ export default function TextSpeakerPage() {
             size="lg"
             onClick={() => {
               setAutopause(!autopause);
-              if (objurlRef) {
+              if (objurlRef.current) {
                 stop();
               }
               setPause(true);