feat(ui): тёмный DateField на react-day-picker вместо нативного input

Нативный <input type="date"> выглядел чужеродно (браузерный светлый календарь).
Новый общий компонент DateField: react-day-picker внутри Radix Popover, тёмная
тема через CSS-переменные .rdp-dark, навигация — наши иконки из барреля,
локализация месяцев/дней по языку кабинета (date-fns). Принимает/отдаёт
'YYYY-MM-DD' — drop-in замена нативного инпута. Подключён в селекторе периода
статистики (свой период). Остальные места — следующими шагами.

package-lock.json

@@ -53,6 +53,7 @@
         "jsencrypt": "^3.5.4",
         "qrcode.react": "^4.2.0",
         "react": "^19.2.4",
+        "react-day-picker": "^10.0.1",
         "react-dom": "^19.2.4",
         "react-i18next": "^16.5.4",
         "react-icons": "^5.6.0",
@@ -392,6 +393,12 @@
         "node": ">=6.9.0"
       }
     },
+    "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/@dnd-kit/accessibility": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/@dnd-kit/accessibility/-/accessibility-3.1.1.tgz",
@@ -4564,6 +4571,16 @@
         "node": ">=12"
       }
     },
+    "node_modules/date-fns": {
+      "version": "4.4.0",
+      "resolved": "https://registry.npmjs.org/date-fns/-/date-fns-4.4.0.tgz",
+      "integrity": "sha512-+1UMbeh68lH1SegH83CGWwpb6OHHbpSgr3+s5Eww5M4CAgswBpoWS0AjTOfEJ33HiYKz1hdj/KTFprzXHmq/6w==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/kossnocorp"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -6870,6 +6887,32 @@
         "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",