fix(brand-questions): accept generic search terms in lexicon validation

Search terms like "全屋定制" or "GEO排名优化" were rejected as invalid because
both the Vue candidate validator and the Go question_metadata classifier
required interrogative cues (什么/如何/为什么/...). Lexicon entries are search
terms, not questions, so require only letters or digits plus the existing
4-char minimum. Rename helpers to searchTermLooksValid/questionLooksValid
to reflect the looser semantics, and relabel the navigation entry from
"公司和词库" to "品牌和词库" to match the actual domain.

apps/admin-web/src/i18n/messages/zh-CN.ts

@@ -79,7 +79,7 @@ const zhCN = {
     media: "媒体管理",
     publishManagement: "发文管理",
     brandManagement: "品牌管理",
-    brands: "公司和词库",
+    brands: "品牌和词库",
     tracking: "数据追踪",
     trackingDetail: "数据详情",
     contentManagement: "内容管理",
@@ -222,7 +222,7 @@ const zhCN = {
       description: "查看桌面端发布任务、外链、账号工作台入口和重发状态。",
     },
     brands: {
-      title: "公司和词库",
+      title: "品牌和词库",
       description: "围绕品牌维护关键词库（搜索词）和竞品信息。",
     },
     brandQuestionCreate: {
@@ -1275,7 +1275,7 @@ const zhCN = {
   },
   brands: {
     eyebrow: "Company & Lexicon",
-    title: "公司和词库",
+    title: "品牌和词库",
     description: "通过品牌名称和品牌相关信息维护关键词库（搜索词）和竞品资产。",
     railTitle: "品牌库",
     selectBrand: "选择品牌后即可继续维护关键词库（搜索词）。",

apps/admin-web/src/views/BrandQuestionCreateView.vue

@@ -506,12 +506,12 @@ function normalizeSearchTermText(value: string): string {
     .replace(/\s+/g, '')
 }
 
-function questionLooksLikeQuestion(value: string): boolean {
+function searchTermLooksValid(value: string): boolean {
   const text = normalizeSearchTermText(value)
   if (text.length < 4) {
     return false
   }
-  return /什么|如何|怎么|哪|为什么|是否|能不能|适合|区别|对比|推荐/.test(text)
+  return /[\p{L}\p{N}]/u.test(text)
 }
 
 function toCandidateRows(candidates: QuestionCandidate[]): CandidateRow[] {
@@ -519,7 +519,7 @@ function toCandidateRows(candidates: QuestionCandidate[]): CandidateRow[] {
     .map((candidate, index) => {
       const text = normalizeSearchTermText(candidate.text)
       const tooShort = text.length < 4
-      const invalid = !questionLooksLikeQuestion(text)
+      const invalid = !searchTermLooksValid(text)
       return {
         ...candidate,
         text,
@@ -545,7 +545,7 @@ function buildLocalCandidates(texts: string[], source: QuestionSource): Candidat
     seen.add(key)
     const tooShort = text.length < 4
     const duplicate = existingQuestionSet.value.has(key) || duplicateInBatch
-    const invalid = !questionLooksLikeQuestion(text)
+    const invalid = !searchTermLooksValid(text)
     rows.push({
       id: `${Date.now()}-${rows.length}-${text}`,
       text,
@@ -682,7 +682,7 @@ function refreshCandidate(row: CandidateRow): void {
   )
   row.too_short = row.text.length < 4
   row.duplicate = Boolean(key) && (existingQuestionSet.value.has(key) || duplicateInBatch)
-  row.suggest_skip = row.too_short || row.duplicate || !questionLooksLikeQuestion(row.text)
+  row.suggest_skip = row.too_short || row.duplicate || !searchTermLooksValid(row.text)
 }
 
 function refreshAllCandidates(): void {

server/internal/tenant/app/question_metadata_classify.go

@@ -123,17 +123,14 @@ func questionLooksValid(text string) bool {
 	if utf8.RuneCountInString(trimmed) < 4 {
 		return false
 	}
-	hasLetterOrNumber := false
+	hasSearchTermChar := false
 	for _, r := range trimmed {
 		if unicode.IsLetter(r) || unicode.IsNumber(r) {
-			hasLetterOrNumber = true
+			hasSearchTermChar = true
 			break
 		}
 	}
-	if !hasLetterOrNumber {
-		return false
-	}
-	return containsAny(strings.ToLower(trimmed), []string{"?", "？", "什么", "如何", "怎么", "哪", "为什么", "是否", "能不能", "适合", "区别", "对比", "推荐"})
+	return hasSearchTermChar
 }
 
 func containsAny(value string, needles []string) bool {

server/internal/tenant/app/question_search_term_validation_test.go

@@ -0,0 +1,48 @@
+package app
+
+import "testing"
+
+func TestQuestionLooksValidAcceptsGenericSearchTerms(t *testing.T) {
+	tests := []string{
+		"全屋定制",
+		"GEO排名优化",
+		"AI搜索排名",
+	}
+
+	for _, text := range tests {
+		if !questionLooksValid(text) {
+			t.Fatalf("questionLooksValid(%q) = false, want true", text)
+		}
+	}
+}
+
+func TestBuildCandidateKeepsGenericSearchTermSavable(t *testing.T) {
+	candidate := buildCandidate(
+		"全屋定制",
+		QuestionSourceManual,
+		false,
+		map[string]struct{}{},
+		&questionBrandContext{BrandName: "安徽海翔家居用品销售有限公司"},
+	)
+
+	if candidate.TooShort {
+		t.Fatal("expected generic search term not to be marked too short")
+	}
+	if candidate.SuggestSkip {
+		t.Fatal("expected generic search term not to be suggested for skip")
+	}
+}
+
+func TestQuestionLooksValidRejectsEmptyOrTooShortTerms(t *testing.T) {
+	tests := []string{
+		"",
+		"！？。",
+		"AI",
+	}
+
+	for _, text := range tests {
+		if questionLooksValid(text) {
+			t.Fatalf("questionLooksValid(%q) = true, want false", text)
+		}
+	}
+}