Add i18n support with language selector on login page (#1410)

* feat: add i18n support with language selector on login page

Co-Authored-By: Junyan Qin <Chin> <rockchinq@gmail.com>

* feat: complete i18n implementation for all webui components

Co-Authored-By: Junyan Qin <Chin> <rockchinq@gmail.com>

* feat: complete all hardcoded text

* feat: dynamic label i18n

* fix: lint errors

* fix: lint errors

* delete sh fils

* fix: edit model dialog title

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Junyan Qin <Chin> <rockchinq@gmail.com>

web/package-lock.json

@@ -25,6 +25,8 @@
         "axios": "^1.8.4",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
+        "i18next": "^25.1.2",
+        "i18next-browser-languagedetector": "^8.1.0",
         "lodash": "^4.17.21",
         "lucide-react": "^0.507.0",
         "next": "15.2.4",
@@ -33,6 +35,7 @@
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
         "react-hook-form": "^7.56.3",
+        "react-i18next": "^15.5.1",
         "sonner": "^2.0.3",
         "tailwind-merge": "^3.2.0",
         "tailwindcss": "^4.1.5",
@@ -68,6 +71,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.27.1.tgz",
+      "integrity": "sha512-1x3D2xEk2fRo3PAhwQwu5UubzgiVWSXTBfWpVd2Mx2AzRqJuDJCsgaDVZ7HB5iGzDW1Hl1sWN2mFyKjmR9uAog==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@dnd-kit/accessibility": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/@dnd-kit/accessibility/-/accessibility-3.1.1.tgz",
@@ -4375,6 +4387,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/html-parse-stringify": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/html-parse-stringify/-/html-parse-stringify-3.0.1.tgz",
+      "integrity": "sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg==",
+      "license": "MIT",
+      "dependencies": {
+        "void-elements": "3.1.0"
+      }
+    },
     "node_modules/human-signals": {
       "version": "5.0.0",
       "resolved": "https://registry.npmmirror.com/human-signals/-/human-signals-5.0.0.tgz",
@@ -4384,6 +4405,46 @@
         "node": ">=16.17.0"
       }
     },
+    "node_modules/i18next": {
+      "version": "25.1.2",
+      "resolved": "https://registry.npmjs.org/i18next/-/i18next-25.1.2.tgz",
+      "integrity": "sha512-SP63m8LzdjkrAjruH7SCI3ndPSgjt4/wX7ouUUOzCW/eY+HzlIo19IQSfYA9X3qRiRP1SYtaTsg/Oz/PGsfD8w==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://locize.com"
+        },
+        {
+          "type": "individual",
+          "url": "https://locize.com/i18next.html"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.26.10"
+      },
+      "peerDependencies": {
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/i18next-browser-languagedetector": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/i18next-browser-languagedetector/-/i18next-browser-languagedetector-8.1.0.tgz",
+      "integrity": "sha512-mHZxNx1Lq09xt5kCauZ/4bsXOEA2pfpwSoU11/QTJB+pD94iONFwp+ohqi///PwiFvjFOxe1akYCdHyFo1ng5Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.23.2"
+      }
+    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -6033,6 +6094,32 @@
         "react": "^16.8.0 || ^17 || ^18 || ^19"
       }
     },
+    "node_modules/react-i18next": {
+      "version": "15.5.1",
+      "resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-15.5.1.tgz",
+      "integrity": "sha512-C8RZ7N7H0L+flitiX6ASjq9p5puVJU1Z8VyL3OgM/QOMRf40BMZX+5TkpxzZVcTmOLPX5zlti4InEX5pFyiVeA==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.25.0",
+        "html-parse-stringify": "^3.0.1"
+      },
+      "peerDependencies": {
+        "i18next": ">= 23.2.3",
+        "react": ">= 16.8.0",
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        },
+        "react-native": {
+          "optional": true
+        },
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-is": {
       "version": "16.13.1",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz",
@@ -7069,7 +7156,7 @@
       "version": "5.8.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
       "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
-      "dev": true,
+      "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -7184,6 +7271,15 @@
         "uuidjs": "dist/cli.js"
       }
     },
+    "node_modules/void-elements": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
+      "integrity": "sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",