编辑卡片类型徽标不随题干换行(shrink-0+min-w-0);新增题目按钮去掉双加号(图标+文字)

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/app/parent/exams/question-list.test.tsx

@@ -25,7 +25,7 @@ describe("QuestionList 结构化编辑", () => {
     const user = userEvent.setup();
     let saved: QuizQ[] = [];
     render(<QuestionList value={[]} onChange={(v) => (saved = v)} />);
-    await user.click(screen.getByText("+ 新增题目"));
+    await user.click(screen.getByText("新增题目"));
     await user.selectOptions(screen.getByLabelText("题型"), "choice");
     await user.type(screen.getByLabelText("题干"), "2+2=?");
     await user.click(screen.getByText("+ 添加选项"));
@@ -43,7 +43,7 @@ describe("QuestionList 结构化编辑", () => {
   it("新建应用题仅 answer 模式(无判分模式 select)", async () => {
     const user = userEvent.setup();
     render(<QuestionList value={[]} onChange={() => {}} />);
-    await user.click(screen.getByText("+ 新增题目"));
+    await user.click(screen.getByText("新增题目"));
     await user.selectOptions(screen.getByLabelText("题型"), "solve");
     expect(screen.queryByLabelText("判分模式")).not.toBeInTheDocument();
     expect(screen.getByText("仅最终答案(秒判)")).toBeInTheDocument();
@@ -77,7 +77,7 @@ describe("QuestionList 结构化编辑", () => {
     const user = userEvent.setup();
     let saved: QuizQ[] = [];
     render(<QuestionList value={[]} onChange={(v) => (saved = v)} />);
-    await user.click(screen.getByText("+ 新增题目"));
+    await user.click(screen.getByText("新增题目"));
     await user.click(screen.getByText("完成"));
     expect(saved.length).toBe(0);
     expect(screen.getByText(/缺少题干/)).toBeInTheDocument();

src/app/parent/exams/question-list.tsx

@@ -214,9 +214,9 @@ export function QuestionList({
           <Fragment key={i}>
             <div className="rounded-xl border border-slate-100 bg-slate-50/60 p-3">
               <div className="flex items-center gap-2">
-                <span className="rounded-full bg-indigo-100 px-2 py-0.5 text-xs font-medium text-indigo-700">{TYPE_LABEL[def.type]}</span>
-                <span className="truncate text-sm font-medium text-slate-800">{def.stem}</span>
-                <span className="ml-auto flex items-center gap-1">
+                <span className="shrink-0 rounded-full bg-indigo-100 px-2 py-0.5 text-xs font-medium text-indigo-700">{TYPE_LABEL[def.type]}</span>
+                <span className="min-w-0 flex-1 truncate text-sm font-medium text-slate-800">{def.stem}</span>
+                <span className="ml-auto flex shrink-0 items-center gap-1">
                   <button type="button" aria-label={`上移第 ${i + 1} 题`} className="text-muted-foreground hover:text-indigo-600" onClick={() => move(i, -1)}>
                     <ArrowUp className="size-4" />
                   </button>
@@ -240,7 +240,7 @@ export function QuestionList({
       {draft && editIndex == null && draftForm}
       {!draft && (
         <Button variant="outline" onClick={startNew}>
-          <Plus className="size-4" /> + 新增题目
+          <Plus className="size-4" /> 新增题目
         </Button>
       )}
     </div>