feat: key export/import, command import, virtualized scrolling

- P2-6: KeyList virtualized scrolling using @tanstack/vue-virtual (>100 keys)
- P2-8: Key export to CSV (DUMP + PTTL, hex-encoded)
- P2-9: Key import from CSV (RESTORE ... REPLACE)
- P2-10: CLI command import from text file
- i18n keys for all features (zh-CN + en)

package-lock.json

@@ -10,6 +10,7 @@
       "hasInstallScript": true,
       "dependencies": {
         "@guolao/vue-monaco-editor": "^1.6.0",
+        "@tanstack/vue-virtual": "^3.13.31",
         "electron-store": "^11.0.2",
         "electron-updater": "^6.8.9",
         "ioredis": "^5.7.0",
@@ -1881,6 +1882,32 @@
         "node": ">=10"
       }
     },
+    "node_modules/@tanstack/virtual-core": {
+      "version": "3.17.3",
+      "resolved": "https://registry.npmjs.org/@tanstack/virtual-core/-/virtual-core-3.17.3.tgz",
+      "integrity": "sha512-8Np/TFELpI0ySuJoVmjvOrQYXH/8sTX0Biv9szhFhY39xOdAAY+smrMxjxOum/ux3eM8MUJQsEJ0/R0UpvC8dw==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      }
+    },
+    "node_modules/@tanstack/vue-virtual": {
+      "version": "3.13.31",
+      "resolved": "https://registry.npmjs.org/@tanstack/vue-virtual/-/vue-virtual-3.13.31.tgz",
+      "integrity": "sha512-wZMEoSf852jQqaf3Ika1J7PiBae6341LNy/2CxmIyn0XKDQXMuK41wVX+xp6G0yx8jyR95Ef+Tdr13DK7mbJtQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@tanstack/virtual-core": "3.17.3"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/tannerlinsley"
+      },
+      "peerDependencies": {
+        "vue": "^2.7.0 || ^3.0.0"
+      }
+    },
     "node_modules/@tootallnate/once": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-2.0.1.tgz",