feat(机柜管理): 添加机柜导入导出功能并优化分页查询

- 添加xlsx依赖支持Excel文件处理
- 实现机柜数据的导入导出功能，包括模板下载
- 优化机柜列表的分页查询接口
- 修复机柜可视化页面U位标记位置计算问题
- 更新背景设置和渐变颜色样式

backend/package-lock.json

@@ -18,7 +18,8 @@
         "mysql2": "^3.16.0",
         "sequelize": "^6.32.1",
         "sqlite3": "^5.1.6",
-        "three": "^0.182.0"
+        "three": "^0.182.0",
+        "xlsx": "^0.18.5"
       },
       "devDependencies": {
         "nodemon": "^3.0.1"
@@ -117,6 +118,15 @@
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       }
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+    "node_modules/adler-32": {
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+      "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.3.1.tgz",
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+      "license": "Apache-2.0",
+      "engines": {
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@@ -466,6 +476,19 @@
         "url": "https://github.com/sponsors/ljharb"
       }
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+    "node_modules/cfb": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/cfb/-/cfb-1.2.2.tgz",
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+      "license": "Apache-2.0",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "crc-32": "~1.2.0"
+      },
+      "engines": {
+        "node": ">=0.8"
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@@ -510,6 +533,15 @@
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+      "resolved": "https://registry.npmjs.org/codepage/-/codepage-1.15.0.tgz",
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+      "license": "Apache-2.0",
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@@ -583,6 +615,18 @@
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+      "license": "Apache-2.0",
+      "bin": {
+        "crc32": "bin/crc32.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
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     "node_modules/csv-parser": {
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@@ -926,6 +970,15 @@
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+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
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       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
@@ -2712,6 +2765,18 @@
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       }
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+    "node_modules/ssf": {
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+      "resolved": "https://registry.npmjs.org/ssf/-/ssf-0.11.2.tgz",
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+      "license": "Apache-2.0",
+      "dependencies": {
+        "frac": "~1.1.2"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
@@ -3049,12 +3114,51 @@
         "@types/node": "*"
       }
     },
+    "node_modules/wmf": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wmf/-/wmf-1.0.2.tgz",
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+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
+    "node_modules/word": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/word/-/word-0.3.0.tgz",
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+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.8"
+      }
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       "license": "ISC"
     },
+    "node_modules/xlsx": {
+      "version": "0.18.5",
+      "resolved": "https://registry.npmjs.org/xlsx/-/xlsx-0.18.5.tgz",
+      "integrity": "sha512-dmg3LCjBPHZnQp5/F/+nnTa+miPJxUXB6vtk42YjBBKayDNagxGEeIdWApkYPOf3Z3pm3k62Knjzp7lMeTEtFQ==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "adler-32": "~1.3.0",
+        "cfb": "~1.2.1",
+        "codepage": "~1.15.0",
+        "crc-32": "~1.2.1",
+        "ssf": "~0.11.2",
+        "wmf": "~1.0.1",
+        "word": "~0.3.0"
+      },
+      "bin": {
+        "xlsx": "bin/xlsx.njs"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/yallist": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",