i18n: update cache terminology across all languages

- Change 'Cache Read' to 'Cache Hit' in all languages
- Change 'Cache Write' to 'Cache Creation' in all languages
- Update zh: 缓存读取 → 缓存命中, 缓存写入 → 缓存创建
- Update en: Cache Read → Cache Hit, Cache Write → Cache Creation
- Update ja: キャッシュ読取 → キャッシュヒット, キャッシュ書込 → キャッシュ作成

Affected keys: cacheReadTokens, cacheCreationTokens, cacheReadCost,
cacheWriteCost, cacheRead, cacheWrite

src/i18n/locales/en.json

@@ -436,8 +436,8 @@
     "billingModel": "Billing Model",
     "inputTokens": "Input",
     "outputTokens": "Output",
-    "cacheReadTokens": "Cache Read",
-    "cacheCreationTokens": "Cache Write",
+    "cacheReadTokens": "Cache Hit",
+    "cacheCreationTokens": "Cache Creation",
     "timingInfo": "Duration/TTFT",
     "status": "Status",
     "noData": "No data",
@@ -453,8 +453,8 @@
     "displayName": "Display Name",
     "inputCost": "Input Cost",
     "outputCost": "Output Cost",
-    "cacheReadCost": "Cache Read",
-    "cacheWriteCost": "Cache Write",
+    "cacheReadCost": "Cache Hit",
+    "cacheWriteCost": "Cache Creation",
     "deleteConfirmTitle": "Confirm Delete",
     "deleteConfirmDesc": "Are you sure you want to delete this model pricing? This action cannot be undone.",
     "queryFailed": "Query failed",
@@ -481,8 +481,8 @@
     "timeRange": "Time Range",
     "input": "Input",
     "output": "Output",
-    "cacheWrite": "Write",
-    "cacheRead": "Read"
+    "cacheWrite": "Creation",
+    "cacheRead": "Hit"
   },
   "usageScript": {
     "title": "Configure Usage Query",

src/i18n/locales/ja.json

@@ -436,8 +436,8 @@
     "billingModel": "課金モデル",
     "inputTokens": "入力",
     "outputTokens": "出力",
-    "cacheReadTokens": "キャッシュ読取",
-    "cacheCreationTokens": "キャッシュ書込",
+    "cacheReadTokens": "キャッシュヒット",
+    "cacheCreationTokens": "キャッシュ作成",
     "timingInfo": "応答時間/TTFT",
     "status": "ステータス",
     "noData": "データなし",
@@ -453,8 +453,8 @@
     "displayName": "表示名",
     "inputCost": "入力コスト",
     "outputCost": "出力コスト",
-    "cacheReadCost": "キャッシュ読取",
-    "cacheWriteCost": "キャッシュ書込",
+    "cacheReadCost": "キャッシュヒット",
+    "cacheWriteCost": "キャッシュ作成",
     "deleteConfirmTitle": "削除の確認",
     "deleteConfirmDesc": "このモデル料金を削除しますか？この操作は元に戻せません。",
     "queryFailed": "照会に失敗しました",
@@ -481,8 +481,8 @@
     "timeRange": "期間",
     "input": "Input",
     "output": "Output",
-    "cacheWrite": "Write",
-    "cacheRead": "Read"
+    "cacheWrite": "作成",
+    "cacheRead": "ヒット"
   },
   "usageScript": {
     "title": "利用状況を設定",

src/i18n/locales/zh.json

@@ -436,8 +436,8 @@
     "billingModel": "计费模型",
     "inputTokens": "输入",
     "outputTokens": "输出",
-    "cacheReadTokens": "缓存读取",
-    "cacheCreationTokens": "缓存写入",
+    "cacheReadTokens": "缓存命中",
+    "cacheCreationTokens": "缓存创建",
     "timingInfo": "用时/首字",
     "status": "状态",
     "noData": "暂无数据",
@@ -453,8 +453,8 @@
     "displayName": "显示名称",
     "inputCost": "输入成本",
     "outputCost": "输出成本",
-    "cacheReadCost": "缓存读取",
-    "cacheWriteCost": "缓存写入",
+    "cacheReadCost": "缓存命中",
+    "cacheWriteCost": "缓存创建",
     "deleteConfirmTitle": "确认删除",
     "deleteConfirmDesc": "确定要删除此模型定价配置吗？此操作无法撤销。",
     "queryFailed": "查询失败",
@@ -481,8 +481,8 @@
     "timeRange": "时间范围",
     "input": "Input",
     "output": "Output",
-    "cacheWrite": "Write",
-    "cacheRead": "Read"
+    "cacheWrite": "创建",
+    "cacheRead": "命中"
   },
   "usageScript": {
     "title": "配置用量查询",