test: cover broader non-Latin script matrix in UrlTitle

Reviewer pointed out the fix changes slug generation for many non-Latin
scripts, not just Arabic. Pin the actual behavior across Thai, Japanese
hiragana, Korean, Hebrew, and Cyrillic so the test surface matches the
real scope of the change.

Also pin the pre-existing Japanese-kanji-via-pinyin path so reviewers
can see it is unchanged by this PR.

Author: ahmedqasid

pkg/htmltext/htmltext_test.go

@@ -116,14 +116,50 @@ func TestUrlTitleTable(t *testing.T) {
 			want:  "zhe-shi-yi-ge-biao-ti",
 		},
 		{
-			name:  "pure arabic transliterated",
+			// The fix: previously collapsed to "topic" for all of these scripts.
+			// Outputs are an ASCII approximation, not linguistically correct
+			// romanization — see PR description.
+			name:  "arabic transliterated",
 			title: "كيف حالك",
 			want:  "kyf-hlk",
 		},
 		{
 			name:  "mixed latin and arabic",
-			title: "hello كيف",
-			want:  "hello-kyf",
+			title: "مرحبا hello",
+			want:  "mrhb-hello",
+		},
+		{
+			name:  "thai transliterated",
+			title: "ไทย ไทย",
+			want:  "aithy-aithy",
+		},
+		{
+			name:  "japanese hiragana transliterated",
+			title: "こんにちは",
+			want:  "konnichiha",
+		},
+		{
+			// Japanese with Han-block kanji is caught by the pre-existing pinyin
+			// pre-step (Chinese reading, not Japanese), so this path is unchanged
+			// by this PR. Pinning to document the existing behavior.
+			name:  "japanese kanji goes through pinyin path unchanged",
+			title: "日本",
+			want:  "ri-ben",
+		},
+		{
+			name:  "korean transliterated",
+			title: "안녕하세요",
+			want:  "annyeonghaseyo",
+		},
+		{
+			name:  "hebrew transliterated",
+			title: "שלום עולם",
+			want:  "shlvm-vlm",
+		},
+		{
+			name:  "cyrillic transliterated",
+			title: "Привет мир",
+			want:  "privet-mir",
 		},
 		{
 			name:  "emoji only falls back to topic",