zh locale: translate all 40250 itemdesc descriptions, wrapped for the tooltip

itemdesc_translate_zh.tsv maps the English description/summary text to Chinese (1,788 entries,
every itemdesc row covered). build_zh_locale.py replaces the cells and wraps Chinese into
26-byte lines joined by ' |', which 40250's Western SplitDescription turns into forced line
breaks; the 50307 overlay row is wrapped the same way.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/test_build_zh_locale.py

@@ -13,6 +13,29 @@ MODULE = importlib.util.module_from_spec(SPEC)
 SPEC.loader.exec_module(MODULE)
 
 
+def split_description(desc, limit):
+    """uitooltip.SplitDescription (40250 root), which runs on the encoded bytes under Python 2."""
+    line_tokens, line_len, lines = [], 0, []
+    for token in desc.split():
+        if b"|" in token:
+            sep_pos = token.find(b"|")
+            line_tokens.append(token[:sep_pos])
+            lines.append(b" ".join(line_tokens))
+            line_len = len(token) - (sep_pos + 1)
+            line_tokens = [token[sep_pos + 1:]]
+        else:
+            line_len += len(token)
+            if len(line_tokens) + line_len > limit:
+                lines.append(b" ".join(line_tokens))
+                line_len = len(token)
+                line_tokens = [token]
+            else:
+                line_tokens.append(token)
+    if line_tokens:
+        lines.append(b" ".join(line_tokens))
+    return lines
+
+
 class LocaleBuildTest(unittest.TestCase):
     def test_preserves_40250_keys_formats_and_proto(self):
         with tempfile.TemporaryDirectory() as directory:
@@ -95,6 +118,31 @@ class LocaleBuildTest(unittest.TestCase):
             with self.assertRaises(ValueError):
                 MODULE.overlay_rows(root / "itemdesc.txt", root / "overlay.txt")
 
+    def test_itemdesc_translation_wraps_for_split_description(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            (root / "itemdesc.txt").write_bytes(
+                b"27001\tRed Potion (S)\tRestores HP.\t\r\n"
+                b"27002\tRed Potion (M)\tRestores 1,000 HP. Item is tradeable.\tPotion production\r\n"
+                b"99\tNew\tCaf\xe9.\t\r\n")
+            (root / "table.tsv").write_text(
+                "# English\t中文\nRestores HP.\t恢复生命值。\n"
+                "Restores 1,000 HP. Item is tradeable.\t立即恢复1,000点生命值，此物品可交易，冷却时间结束后可再次使用。\n"
+                "Potion production\t药水制作\n")
+            result = MODULE.translate_itemdesc(root / "itemdesc.txt", root / "table.tsv")
+            rows = (root / "itemdesc.txt").read_bytes().decode("gbk").split("\r\n")
+            self.assertEqual(rows[0], "27001\tRed Potion (S)\t恢复生命值。\t")
+            wrapped = rows[1].split("\t")[2]
+            self.assertEqual(wrapped, "立即恢复1,000点生命值， |此物品可交易， |冷却时间结束后可再次使用。")
+            self.assertEqual(rows[1].split("\t")[3], "药水制作")
+            self.assertEqual(rows[2], "99\tNew\tCafé.\t")
+            self.assertEqual(result, {"translated_cells": 3, "english_rows": ["99"]})
+            # uitooltip.SplitDescription (40250, Western path, 35 columns) on the GBK bytes gives these lines.
+            lines = split_description(wrapped.encode("gbk"), 35)
+            self.assertEqual([line.strip().decode("gbk") for line in lines],
+                             ["立即恢复1,000点生命值，", "此物品可交易，", "冷却时间结束后可再次使用。"])
+            self.assertEqual(MODULE.wrap_description("Plain English text"), "Plain English text")
+
     def test_skilldesc_keeps_format_arguments(self):
         with tempfile.TemporaryDirectory() as directory:
             root = Path(directory)