feat(#40): Persian (Jalali) date pickers in admin

Add react-multi-date-picker + a reusable PersianDateInput (displays Jalali, stores
Gregorian ISO so DTOs are unchanged). Replace admin date inputs: UserProfileEdit
birthdate + CRM date-range filters.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package-lock.json

@@ -40,6 +40,7 @@
         "react-dom": "^18",
         "react-hook-form": "^7.76.0",
         "react-konva": "^18.2.16",
+        "react-multi-date-picker": "^4.5.2",
         "react-rnd": "^10.5.3",
         "tailwind-merge": "^3.6.0",
         "use-image": "^1.1.4",
@@ -7285,6 +7286,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-date-object": {
+      "version": "2.1.9",
+      "resolved": "https://registry.npmjs.org/react-date-object/-/react-date-object-2.1.9.tgz",
+      "integrity": "sha512-BHxD/quWOTo9fLKV/cfL/M31ePoj4a1JaJ/CnOf8Ndg3mrkh4x9wEMMkCfTrzduxDOgU8ZgR8uarhqI5G71sTg==",
+      "license": "MIT"
+    },
     "node_modules/react-dom": {
       "version": "18.3.1",
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.3.1.tgz",
@@ -7312,6 +7319,16 @@
         "react-dom": ">= 16.3.0"
       }
     },
+    "node_modules/react-element-popper": {
+      "version": "2.1.7",
+      "resolved": "https://registry.npmjs.org/react-element-popper/-/react-element-popper-2.1.7.tgz",
+      "integrity": "sha512-tuM2OxKlW32h+6uFSK6EENHPeZ2OGgOipHfOAl+VLWEv9/j3QkSGbD+ADX3A9uJlmq24i37n28RjJmAbGTfpEg==",
+      "license": "MIT",
+      "peerDependencies": {
+        "react": ">=16.8.0",
+        "react-dom": ">=16.8.0"
+      }
+    },
     "node_modules/react-hook-form": {
       "version": "7.76.0",
       "resolved": "https://registry.npmjs.org/react-hook-form/-/react-hook-form-7.76.0.tgz",
@@ -7365,6 +7382,20 @@
         "react-dom": ">=18.0.0"
       }
     },
+    "node_modules/react-multi-date-picker": {
+      "version": "4.5.2",
+      "resolved": "https://registry.npmjs.org/react-multi-date-picker/-/react-multi-date-picker-4.5.2.tgz",
+      "integrity": "sha512-FgWjZB3Z6IA6XpcWiLPk85PwcRUhOiYhKK42o5k672gD/n2I6rzPfQ8bUrldOIiF/Z7FfOCdH7a6FeubzqteLg==",
+      "license": "MIT",
+      "dependencies": {
+        "react-date-object": "^2.1.8",
+        "react-element-popper": "^2.1.6"
+      },
+      "peerDependencies": {
+        "react": ">=16.8.0",
+        "react-dom": ">=16.8.0"
+      }
+    },
     "node_modules/react-reconciler": {
       "version": "0.29.2",
       "resolved": "https://registry.npmjs.org/react-reconciler/-/react-reconciler-0.29.2.tgz",