feat(dashboard): add date difference and timezone conversion tools for dashboard

package-lock.json

@@ -37,6 +37,7 @@
         "jspdf": "^3.0.1",
         "langchain": "^0.3.26",
         "lucide-react": "^0.525.0",
+        "luxon": "^3.7.1",
         "mammoth": "^1.9.1",
         "markdown-to-jsx": "^7.7.2",
         "next": "^15.2.2",
@@ -59,6 +60,7 @@
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         "@types/jsdom": "^21.1.7",
         "@types/jspdf": "^2.0.0",
+        "@types/luxon": "^3.6.2",
         "@types/node": "^20",
         "@types/pdf-parse": "^1.1.4",
         "@types/react": "^19",
@@ -3374,6 +3376,13 @@
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       "license": "MIT"
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+    "node_modules/@types/luxon": {
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+      "resolved": "https://registry.npmjs.org/@types/luxon/-/luxon-3.6.2.tgz",
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+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/ms": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/@types/ms/-/ms-2.1.0.tgz",
@@ -8846,6 +8855,15 @@
         "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
       }
     },
+    "node_modules/luxon": {
+      "version": "3.7.1",
+      "resolved": "https://registry.npmjs.org/luxon/-/luxon-3.7.1.tgz",
+      "integrity": "sha512-RkRWjA926cTvz5rAb1BqyWkKbbjzCGchDUIKMCUvNi17j6f6j8uHGDV82Aqcqtzd+icoYpELmG3ksgGiFNNcNg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/mammoth": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/mammoth/-/mammoth-1.9.1.tgz",