feat: Memory Analysis tab

- New MemoryAnalysis.vue: scan all keys with MEMORY USAGE
- Pause/resume/stop scanning, min size filter, sort asc/desc
- Added as tab in MainArea with Odometer icon
- i18n keys for all memory analysis labels (zh-CN + en)

src/i18n/locales/zh-CN.ts

@@ -138,6 +138,24 @@ export default {
     duration: '耗时',
     command: '命令',
   },
+  memory: {
+    title: '内存分析',
+    scan: '开始扫描',
+    pause: '暂停',
+    resume: '继续',
+    stop: '停止',
+    scanning: '扫描中...',
+    paused: '已暂停',
+    noData: '暂无数据',
+    key: '键名',
+    size: '大小',
+    type: '类型',
+    totalSize: '总大小',
+    minSize: '最小大小 (KB)',
+    sortAsc: '升序',
+    sortDesc: '降序',
+    scanned: '已扫描 {n} 个',
+  },
   status: {
     title: '状态',
     database: '数据库',