feat: add shadcn calendar primitives

frontend/package-lock.json

@@ -19,6 +19,7 @@
         "lucide-react": "^1.24.0",
         "next": "16.2.10",
         "react": "19.2.4",
+        "react-day-picker": "^10.0.1",
         "react-dom": "19.2.4",
         "react-markdown": "^10.1.0",
         "remark-gfm": "^4.0.1",
@@ -575,6 +576,12 @@
         }
       }
     },
+    "node_modules/@date-fns/tz": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@date-fns/tz/-/tz-1.5.0.tgz",
+      "integrity": "sha512-lwYN/vDPeNRULcepoE/LO2Pgx+7/RV+S9ARfbc9lr2DtGkOD7pAiruHvbR1RX3Qyf6ja47EWJDMsNK5vK08DJg==",
+      "license": "MIT"
+    },
     "node_modules/@ecies/ciphers": {
       "version": "0.2.6",
       "resolved": "https://registry.npmjs.org/@ecies/ciphers/-/ciphers-0.2.6.tgz",
@@ -8681,6 +8688,32 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-day-picker": {
+      "version": "10.0.1",
+      "resolved": "https://registry.npmjs.org/react-day-picker/-/react-day-picker-10.0.1.tgz",
+      "integrity": "sha512-eNh6BlwcYInWaJtRv18mXQ06Ys/H6rdTZAnTaSdOYJuTpwP1JMCHNd1FDRadA+gbeinq+psdULN5Xnowy9mV8w==",
+      "license": "MIT",
+      "dependencies": {
+        "@date-fns/tz": "^1.4.1",
+        "date-fns": "^4.1.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "individual",
+        "url": "https://github.com/sponsors/gpbl"
+      },
+      "peerDependencies": {
+        "@types/react": ">=16.8.0",
+        "react": ">=16.8.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-dom": {
       "version": "19.2.4",
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.4.tgz",