diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
new file mode 100644
index 0000000..620bc2a
--- /dev/null
+++ b/.github/workflows/build-test.yml
@@ -0,0 +1,42 @@
+name: Build Test
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Retrieve Server Install Action
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: Nodarx/action-server-install
+          ref: main
+          path: action-server-install
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install Server
+        uses: ./action-server-install
+        with:
+          install-php: 'false'
+          install-node: 'true'
+          php-version: '8.5'
+          node-version: '24'
+          server-path: './server'
+
+      - name: Checkout Pull Request
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: ${{ github.repository }}
+          ref: ${{ github.event.pull_request.head.sha }}
+          path: server/modules/mail_manager
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install dependencies
+        run: npm ci
+        working-directory: server/modules/mail_manager
+
+      - name: Build
+        run: npm run build
+        working-directory: server/modules/mail_manager
diff --git a/.github/workflows/js-unit-tests.yml b/.github/workflows/js-unit-tests.yml
new file mode 100644
index 0000000..6ea0f40
--- /dev/null
+++ b/.github/workflows/js-unit-tests.yml
@@ -0,0 +1,42 @@
+name: JS Unit Tests
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Retrieve Server Install Action
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: Nodarx/action-server-install
+          ref: main
+          path: action-server-install
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install Server
+        uses: ./action-server-install
+        with:
+          install-php: 'false'
+          install-node: 'true'
+          php-version: '8.5'
+          node-version: '24'
+          server-path: './server'
+
+      - name: Checkout Pull Request
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: ${{ github.repository }}
+          ref: ${{ github.event.pull_request.head.sha }}
+          path: server/modules/mail_manager
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install dependencies
+        run: npm ci
+        working-directory: server/modules/mail_manager
+
+      - name: Run tests
+        run: npm run test:unit
+        working-directory: server/modules/mail_manager
diff --git a/.github/workflows/php-unit-tests.yml b/.github/workflows/php-unit-tests.yml
new file mode 100644
index 0000000..c5655b0
--- /dev/null
+++ b/.github/workflows/php-unit-tests.yml
@@ -0,0 +1,42 @@
+name: PHP Unit Tests
+
+on:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Retrieve Server Install Action
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: Nodarx/action-server-install
+          ref: main
+          path: action-server-install
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install Server
+        uses: ./action-server-install
+        with:
+          install-php: 'true'
+          install-node: 'false'
+          php-version: '8.5'
+          node-version: '24'
+          server-path: './server'
+
+      - name: Checkout Pull Request
+        uses: actions/checkout@v6.0.2
+        with:
+          repository: ${{ github.repository }}
+          ref: ${{ github.event.pull_request.head.sha }}
+          path: server/modules/mail_manager
+          github-server-url: https://git.ktrix.dev
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+        working-directory: server/modules/mail_manager
+
+      - name: Run tests
+        run: composer test:unit
+        working-directory: server/modules/mail_manager
diff --git a/.github/workflows/renovate.yml b/.github/workflows/renovate.yml
new file mode 100644
index 0000000..703aba3
--- /dev/null
+++ b/.github/workflows/renovate.yml
@@ -0,0 +1,35 @@
+name: Renovate
+
+on:
+  schedule:
+    - cron: "0 3 * * *"
+  workflow_dispatch:
+
+jobs:
+  renovate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6.0.2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6.2.0
+        with:
+          node-version: 24
+          cache: npm
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.5'
+          tools: composer:v2
+
+      - name: Install Renovate
+        run: npm install -g renovate
+
+      - name: Run Renovate
+        env:
+          RENOVATE_TOKEN: ${{ secrets.RENOVATE_TOKEN }}
+          RENOVATE_PLATFORM: gitea
+          RENOVATE_ENDPOINT: https://git.ktrix.dev/api/v1
+        run: renovate ${{ gitea.repository }}
diff --git a/.gitignore b/.gitignore
index 812e4cd..4002be7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@ node_modules/
 /lib/vendor/
 coverage/
 phpunit.xml.cache
+.phpunit.cache
 .phpunit.result.cache
 .php-cs-fixer.cache
 .phpstan.cache
diff --git a/composer.json b/composer.json
index 36986df..0c994bd 100644
--- a/composer.json
+++ b/composer.json
@@ -22,5 +22,18 @@
     "psr-4": {
       "KTXM\\MailManager\\": "lib/"
     }
+  },
+  "autoload-dev": {
+      "psr-4": {
+          "KTXT\\MailManager\\Tests\\": "tests/php/"
+      }
+  },
+  "scripts": {
+      "post-install-cmd": [
+      ],
+      "post-update-cmd": [
+      ],
+      "test:unit": "phpunit --configuration tests/php/phpunit.unit.xml --colors=always --testdox",
+      "test:coverage": "XDEBUG_MODE=coverage phpunit --configuration tests/php/phpunit.unit.xml --coverage-html .phpunit.coverage --coverage-text"
   }
 }
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..a008821
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,23 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "e711938000d424b66eeb32cd36b22ca2",
+    "packages": [],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=8.2 <=8.5"
+    },
+    "platform-dev": [],
+    "platform-overrides": {
+        "php": "8.2"
+    },
+    "plugin-api-version": "2.3.0"
+}
diff --git a/package-lock.json b/package-lock.json
index 5c154c3..66852ac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,9 +9,15 @@
       "version": "1.0.0",
       "license": "AGPL-3.0-or-later",
       "dependencies": {
-        "pinia": "^2.3.1"
+        "pinia": "^2.3.1",
+        "vue": "^3.5.18",
+        "vue-router": "^4.5.1",
+        "vuetify": "^3.10.2"
       },
       "devDependencies": {
+        "@vitejs/plugin-vue": "^6.0.1",
+        "@vitest/coverage-v8": "^4.0.18",
+        "@vitest/ui": "^4.0.18",
         "@vue/tsconfig": "^0.7.0",
         "typescript": "~5.8.3",
         "vite": "^7.1.2",
@@ -64,6 +70,16 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.27.3",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.3.tgz",
@@ -506,12 +522,46 @@
         "node": ">=18"
       }
     },
+    "node_modules/@jridgewell/resolve-uri": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
+      "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/@jridgewell/sourcemap-codec": {
       "version": "1.5.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz",
       "integrity": "sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==",
+      "license": "MIT"
+    },
+    "node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.31",
+      "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.31.tgz",
+      "integrity": "sha512-zzNR+SdQSDJzc8joaeP8QQoCQr8NuYx2dIIytl1QeBEZHJ9uW6hebsrYgbz8hJwUQao3TWCMtmfV8Nu1twOLAw==",
+      "dev": true,
       "license": "MIT",
-      "peer": true
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.1.0",
+        "@jridgewell/sourcemap-codec": "^1.4.14"
+      }
+    },
+    "node_modules/@polka/url": {
+      "version": "1.0.0-next.29",
+      "resolved": "https://registry.npmjs.org/@polka/url/-/url-1.0.0-next.29.tgz",
+      "integrity": "sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/@rolldown/pluginutils": {
+      "version": "1.0.0-rc.2",
+      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-rc.2.tgz",
+      "integrity": "sha512-izyXV/v+cHiRfozX62W9htOAvwMo4/bXKDrQ+vom1L1qRuexPock/7VZDAhnpHCLNejd3NJ6hiab+tO0D44Rgw==",
+      "dev": true,
+      "license": "MIT"
     },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.57.1",
@@ -863,6 +913,34 @@
         "win32"
       ]
     },
+    "node_modules/@standard-schema/spec": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
+      "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/@types/chai": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
+      "integrity": "sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@types/deep-eql": "*",
+        "assertion-error": "^2.0.1"
+      }
+    },
+    "node_modules/@types/deep-eql": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/deep-eql/-/deep-eql-4.0.2.tgz",
+      "integrity": "sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -870,6 +948,203 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@vitejs/plugin-vue": {
+      "version": "6.0.4",
+      "resolved": "https://registry.npmjs.org/@vitejs/plugin-vue/-/plugin-vue-6.0.4.tgz",
+      "integrity": "sha512-uM5iXipgYIn13UUQCZNdWkYk+sysBeA97d5mHsAoAt1u/wpN3+zxOmsVJWosuzX+IMGRzeYUNytztrYznboIkQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@rolldown/pluginutils": "1.0.0-rc.2"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "peerDependencies": {
+        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0-0",
+        "vue": "^3.2.25"
+      }
+    },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "4.0.18",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.0.18.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.2",
+        "@vitest/utils": "4.0.18",
+        "ast-v8-to-istanbul": "^0.3.10",
+        "istanbul-lib-coverage": "^3.2.2",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.2.0",
+        "magicast": "^0.5.1",
+        "obug": "^2.1.1",
+        "std-env": "^3.10.0",
+        "tinyrainbow": "^3.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@vitest/browser": "4.0.18",
+        "vitest": "4.0.18"
+      },
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+      }
+    },
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+      }
+    },
     "node_modules/typescript": {
       "version": "5.8.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
@@ -1424,6 +1990,85 @@
         }
       }
     },
+    "node_modules/vitest": {
+      "version": "4.0.18",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.0.18.tgz",
+      "integrity": "sha512-hOQuK7h0FGKgBAas7v0mSAsnvrIgAvWmRFjmzpJ7SwFHH3g1k2u37JtYwOwmEKhK6ZO3v9ggDBBm0La1LCK4uQ==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@vitest/expect": "4.0.18",
+        "@vitest/mocker": "4.0.18",
+        "@vitest/pretty-format": "4.0.18",
+        "@vitest/runner": "4.0.18",
+        "@vitest/snapshot": "4.0.18",
+        "@vitest/spy": "4.0.18",
+        "@vitest/utils": "4.0.18",
+        "es-module-lexer": "^1.7.0",
+        "expect-type": "^1.2.2",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^3.10.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.0.3",
+        "vite": "^6.0.0 || ^7.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.0.18",
+        "@vitest/browser-preview": "4.0.18",
+        "@vitest/browser-webdriverio": "4.0.18",
+        "@vitest/ui": "4.0.18",
+        "happy-dom": "*",
+        "jsdom": "*"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/vscode-uri": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/vscode-uri/-/vscode-uri-3.1.0.tgz",
@@ -1436,7 +2081,6 @@
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.28.tgz",
       "integrity": "sha512-BRdrNfeoccSoIZeIhyPBfvWSLFP4q8J3u8Ju8Ug5vu3LdD+yTM13Sg4sKtljxozbnuMu1NB1X5HBHRYUzFocKg==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vue/compiler-dom": "3.5.28",
         "@vue/compiler-sfc": "3.5.28",
@@ -1479,6 +2123,21 @@
         }
       }
     },
+    "node_modules/vue-router": {
+      "version": "4.6.4",
+      "resolved": "https://registry.npmjs.org/vue-router/-/vue-router-4.6.4.tgz",
+      "integrity": "sha512-Hz9q5sa33Yhduglwz6g9skT8OBPii+4bFn88w6J+J4MfEo4KRRpmiNG/hHHkdbRFlLBOqxN8y8gf2Fb0MTUgVg==",
+      "license": "MIT",
+      "dependencies": {
+        "@vue/devtools-api": "^6.6.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/posva"
+      },
+      "peerDependencies": {
+        "vue": "^3.5.0"
+      }
+    },
     "node_modules/vue-tsc": {
       "version": "3.2.4",
       "resolved": "https://registry.npmjs.org/vue-tsc/-/vue-tsc-3.2.4.tgz",
@@ -1495,6 +2154,51 @@
       "peerDependencies": {
         "typescript": ">=5.0.0"
       }
+    },
+    "node_modules/vuetify": {
+      "version": "3.11.8",
+      "resolved": "https://registry.npmjs.org/vuetify/-/vuetify-3.11.8.tgz",
+      "integrity": "sha512-4iKnntOnLFFklygZjzlVfcHrtLO8+iK4HOhiia6HP2U8v82x+ngaSCgm+epvPrGyCMfCpfuEttqD2qElrr1axw==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/johnleider"
+      },
+      "peerDependencies": {
+        "typescript": ">=4.7",
+        "vite-plugin-vuetify": ">=2.1.0",
+        "vue": "^3.5.0",
+        "webpack-plugin-vuetify": ">=3.1.0"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        },
+        "vite-plugin-vuetify": {
+          "optional": true
+        },
+        "webpack-plugin-vuetify": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
     }
   }
 }
diff --git a/package.json b/package.json
index 4657996..385e8de 100644
--- a/package.json
+++ b/package.json
@@ -10,12 +10,23 @@
     "build": "vite build --mode production --config vite.config.ts",
     "dev": "vite build --mode development --config vite.config.ts",
     "watch": "vite build --mode development --watch --config vite.config.ts",
-    "typecheck": "vue-tsc --noEmit"
+    "typecheck": "vue-tsc --noEmit",
+    "lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore",
+    "test": "vitest run --config tests/js/vitest.config.ts",
+    "test:unit": "vitest run --config tests/js/vitest.config.ts",
+    "test:watch": "vitest watch --config tests/js/vitest.config.ts",
+    "test:coverage": "vitest run --coverage --config tests/js/vitest.config.ts"
   },
   "dependencies": {
-    "pinia": "^2.3.1"
+    "pinia": "^2.3.1",
+    "vue": "^3.5.18",
+    "vue-router": "^4.5.1",
+    "vuetify": "^3.10.2"
   },
   "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.1",
+    "@vitest/coverage-v8": "^4.0.18",
+    "@vitest/ui": "^4.0.18",
     "@vue/tsconfig": "^0.7.0",
     "typescript": "~5.8.3",
     "vite": "^7.1.2",
diff --git a/tests/js/unit/base.test.ts b/tests/js/unit/base.test.ts
new file mode 100644
index 0000000..a3fc7cd
--- /dev/null
+++ b/tests/js/unit/base.test.ts
@@ -0,0 +1,30 @@
+import { describe, it, expect } from 'vitest'
+
+describe('Basic Tests', () => {
+  it('should perform basic assertion', () => {
+    expect(true).toBe(true)
+  })
+
+  it('should test array operations', () => {
+    const array = ['foo', 'bar', 'baz']
+    
+    expect(array).toHaveLength(3)
+    expect(array).toContain('bar')
+    expect(array[0]).toBe('foo')
+  })
+
+  it('should test string operations', () => {
+    const string = 'Hello, World!'
+    
+    expect(string).toContain('World')
+    expect(string.length).toBe(13)
+  })
+
+  it('should test object operations', () => {
+    const obj = { foo: 'bar', count: 42 }
+    
+    expect(obj).toHaveProperty('foo')
+    expect(obj.foo).toBe('bar')
+    expect(obj.count).toBeGreaterThan(40)
+  })
+})
diff --git a/tests/js/vitest.config.ts b/tests/js/vitest.config.ts
new file mode 100644
index 0000000..e3e5eb5
--- /dev/null
+++ b/tests/js/vitest.config.ts
@@ -0,0 +1,33 @@
+import { fileURLToPath } from 'node:url'
+import { defineConfig, configDefaults } from 'vitest/config'
+import vue from '@vitejs/plugin-vue'
+import vuetify from 'vite-plugin-vuetify'
+import path from 'path'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+
+export default defineConfig({
+  plugins: [vue(), vuetify()],
+  resolve: {
+    alias: {
+      '@KTXC': path.resolve(__dirname, '../../../core/src'),
+    },
+  },
+  test: {
+    environment: 'jsdom',
+    exclude: [...configDefaults.exclude, 'e2e/**'],
+    root: fileURLToPath(new URL('../../', import.meta.url)),
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'html'],
+      exclude: [
+        'node_modules/',
+        'tests/',
+        '**/*.d.ts',
+        '**/*.config.*',
+        '**/dist/**',
+      ],
+    },
+  },
+})
diff --git a/tests/php/bootstrap.php b/tests/php/bootstrap.php
new file mode 100644
index 0000000..e71a4d2
--- /dev/null
+++ b/tests/php/bootstrap.php
@@ -0,0 +1,7 @@
+<?php
+
+require dirname(__DIR__, 2).'/lib/vendor/autoload.php';
+
+if (isset($_SERVER['APP_DEBUG']) && $_SERVER['APP_DEBUG']) {
+    umask(0000);
+}
diff --git a/tests/php/phpunit.unit.xml b/tests/php/phpunit.unit.xml
new file mode 100644
index 0000000..582595f
--- /dev/null
+++ b/tests/php/phpunit.unit.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- https://phpunit.readthedocs.io/en/latest/configuration.html -->
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="../../vendor/phpunit/phpunit/phpunit.xsd"
+         colors="true"
+         failOnDeprecation="true"
+         failOnNotice="true"
+         failOnWarning="true"
+         bootstrap="bootstrap.php"
+         cacheDirectory="../../.phpunit.cache"
+>
+    <php>
+        <ini name="display_errors" value="1" />
+        <ini name="error_reporting" value="-1" />
+        <server name="APP_ENV" value="test" force="true" />
+        <server name="SHELL_VERBOSITY" value="-1" />
+    </php>
+
+    <testsuites>
+        <testsuite name="Unit Tests">
+            <directory>unit</directory>
+        </testsuite>
+    </testsuites>
+
+    <source ignoreSuppressionOfDeprecations="true"
+            ignoreIndirectDeprecations="true"
+            restrictNotices="true"
+            restrictWarnings="true"
+    >
+        <include>
+            <directory>../../core/lib</directory>
+            <directory>../../shared/lib</directory>
+        </include>
+
+        <deprecationTrigger>
+            <function>trigger_deprecation</function>
+        </deprecationTrigger>
+    </source>
+
+    <extensions>
+    </extensions>
+</phpunit>
diff --git a/tests/php/unit/BaseTest.php b/tests/php/unit/BaseTest.php
new file mode 100644
index 0000000..69b7594
--- /dev/null
+++ b/tests/php/unit/BaseTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace KTXT\MailManager\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+
+class BaseTest extends TestCase
+{
+    public function testBasicAssertion(): void
+    {
+        $this->assertTrue(true);
+    }
+
+    public function testArrayOperations(): void
+    {
+        $array = ['foo' => 'bar'];
+        
+        $this->assertArrayHasKey('foo', $array);
+        $this->assertEquals('bar', $array['foo']);
+    }
+
+    public function testStringOperations(): void
+    {
+        $string = 'Hello, World!';
+        
+        $this->assertStringContainsString('World', $string);
+        $this->assertEquals(13, strlen($string));
+    }
+}