Fix display-column toggle highlight polarity on compare board.

Highlight when display columns are visible, and use a stable toggle label.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/i18n/en.ts

@@ -527,7 +527,8 @@ const en = {
     keyFiltersToggle: "Field filters",
     hideDisplayCols: "Hide display cols",
     showDisplayCols: "Show display cols",
-    hideDisplayColsHint: "Compact: hide display-only columns so keys and diffs stand out",
+    displayColsToggle: "Display cols",
+    hideDisplayColsHint: "Compact: display-only columns are hidden by default; highlight means they are shown",
     ranWithDuration: "Compare finished ({{s}}s)",
     unchangedNotStored: "Success rows were counted but not stored. Set “Store success rows” to sample and re-run for spot-check.",
     unchangedSampleHint: "{{total}} success rows total; browsing a stratified sample of {{listed}}. Search any route for live source lookup. Pass rate uses all {{total}}.",

web/src/i18n/zh.ts

@@ -526,7 +526,8 @@ const zh = {
     keyFiltersToggle: "字段筛选",
     hideDisplayCols: "隐藏展示列",
     showDisplayCols: "显示展示列",
-    hideDisplayColsHint: "紧凑模式：默认隐藏不参与比对的展示列，突出 Key 与差异",
+    displayColsToggle: "展示列",
+    hideDisplayColsHint: "紧凑模式：默认隐藏不参与比对的展示列；高亮表示当前已显示",
     ranWithDuration: "比对完成（耗时 {{s}} 秒）",
     unchangedNotStored: "成功行仅统计数量未落库。可在任务配置将「成功行保存」改为抽样后重新比对（抽查用）。",
     unchangedSampleHint: "成功共 {{total}} 条，明细抽样 {{listed}} 条（分层抽查）。要查任意路由请输入筛选条件——将按原表即时判定。通过率按全部 {{total}} 计。",