feat: add validation for required fields and improve agent creation logic

frontend/package-lock.json

@@ -14,6 +14,7 @@
         "copy-to-clipboard": "^3.3.3",
         "i18next": "^24.2.0",
         "i18next-browser-languagedetector": "^8.0.2",
+        "lodash": "^4.17.21",
         "mermaid": "^11.6.0",
         "prop-types": "^15.8.1",
         "react": "^19.1.0",
@@ -32,6 +33,7 @@
       },
       "devDependencies": {
         "@tailwindcss/postcss": "^4.1.10",
+        "@types/lodash": "^4.17.20",
         "@types/mermaid": "^9.1.0",
         "@types/react": "^19.1.8",
         "@types/react-dom": "^19.0.0",
@@ -2302,6 +2304,13 @@
       "integrity": "sha512-HMwFiRujE5PjrgwHQ25+bsLJgowjGjm5Z8FVSf0N6PwgJrwxH0QxzHYDcKsTfV3wva0vzrpqMTJS2jXPr5BMEQ==",
       "license": "MIT"
     },
+    "node_modules/@types/lodash": {
+      "version": "4.17.20",
+      "resolved": "https://registry.npmjs.org/@types/lodash/-/lodash-4.17.20.tgz",
+      "integrity": "sha512-H3MHACvFUEiujabxhaI/ImO6gUrd8oOurg7LQtS7mbwIXA/cUqWrvBsaeJ23aZEPk1TAYkurjfMbSELfoCXlGA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/mdast": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/@types/mdast/-/mdast-4.0.4.tgz",
@@ -7226,6 +7235,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/lodash": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+      "license": "MIT"
+    },
     "node_modules/lodash-es": {
       "version": "4.17.21",
       "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz",