diff --git a/.github/workflows/basic-workflow.yml b/.github/workflows/basic-workflow.yml
new file mode 100644
index 0000000..2d13fe9
--- /dev/null
+++ b/.github/workflows/basic-workflow.yml
@@ -0,0 +1,64 @@
+name: Basic Workflow + SonarCloud Analysis
+
+on:
+  push:
+    branches:
+      - 'feature/*'
+      - 'fix/*'
+    paths-ignore:
+      - '*.md'
+      - '.github/workflows/**'
+      - 'docs/**'
+  workflow_dispatch:
+
+jobs:
+  build-and-analyze:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # Frontend steps
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: npm
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install client dependencies
+        working-directory: frontend
+        run: npm ci
+
+      - name: Build client
+        working-directory: frontend
+        run: npm run build
+
+      - name: Run Client Unit Tests with Coverage
+        working-directory: frontend
+        run: npm run test:coverage
+
+      # Backend steps
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with: 
+          distribution: 'temurin'
+          java-version: '25'
+          cache: 'maven'
+
+      - name: Compile Backend & Run Unit Tests with JaCoCo
+        working-directory: backend/pcmod
+        run: ./mvnw clean test jacoco:report -Dgroups="server-unit"
+
+      # SonarCloud Analysis
+      - name: SonarCloud Analysis
+        uses: sonarsource/sonarcloud-github-action@v3.1.0
+        with:
+          projectBaseDir: .
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
diff --git a/.github/workflows/complete-workflow.yml b/.github/workflows/complete-workflow.yml
new file mode 100644
index 0000000..6d2ab30
--- /dev/null
+++ b/.github/workflows/complete-workflow.yml
@@ -0,0 +1,107 @@
+name: Complete Workflow
+
+on:
+  pull_request:
+    branches:
+      - main
+    types: [opened, synchronize, reopened]
+    paths-ignore:
+      - '*.md'
+      - '.github/workflows/**'
+      - 'docs/**'
+  workflow_dispatch:
+
+jobs:
+  server-tests:
+    name: Backend Tests (JUnit, Testcontainers, Rest Assured)
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: backend/pcmod
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          java-version: '25'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Server Unit Tests (Services + Mocks)
+        run: ./mvnw test -Dgroups="server-unit"
+
+      - name: Server Integration Tests (Services + Testcontainers)
+        run: ./mvnw test -Dgroups="server-integration"
+
+      - name: Server System Tests (API REST with Rest Assured)
+        run: ./mvnw test -Dgroups="server-system"
+
+  client-tests:
+    name: Frontend Unit Tests (Virtual DOM / Vitest)
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'npm'
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Client Unit Tests (Components + Virtual DOM)
+        run: npm run test:unit
+
+  client-server-integration-tests:
+    name: E2E & Integration (Chrome + Selenium)
+    runs-on: ubuntu-latest
+    needs: [server-tests, client-tests]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 25
+        uses: actions/setup-java@v4
+        with:
+          java-version: '25'
+          distribution: 'temurin'
+          cache: 'maven'
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '24'
+          cache: 'npm'
+          cache-dependency-path: frontend/package-lock.json
+
+      - name: Set up Chrome for Selenium
+        uses: browser-actions/setup-chrome@v1
+        with:
+          chrome-version: stable
+
+      - name: Prepare and Launch Full Environment
+        env:
+          HEADLESS_TESTS: "true"
+          NODE_TLS_REJECT_UNAUTHORIZED: "0"
+        run: |
+          cd frontend
+          npm run dev &
+          
+          cd ../backend/pcmod
+          ./mvnw spring-boot:run &
+          
+          npx wait-on http-get://localhost:5173 https-get://localhost:8443/
+          
+          ./mvnw test -Dgroups="client-server-integration,client-system"
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 4cc3dd8..b022a65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 frontend/.DS_Store
 frontend/**/.DS_Store
 /frontend/node_modules/
+/frontend/coverage/
 
 # React Router (frontend)
 /frontend/.react-router/
diff --git a/backend/pcmod/mvnw b/backend/pcmod/mvnw
old mode 100644
new mode 100755
diff --git a/backend/pcmod/pom.xml b/backend/pcmod/pom.xml
index 1a1ce55..92a5418 100644
--- a/backend/pcmod/pom.xml
+++ b/backend/pcmod/pom.xml
@@ -112,21 +112,32 @@
   </dependencyManagement>
 
   <build>
-    <pluginManagement>
-      <plugins>
-        <plugin>
-          <groupId>org.jacoco</groupId>
-          <artifactId>jacoco-maven-plugin</artifactId>
-          <version>0.8.14</version>
-        </plugin>
-      </plugins>
-    </pluginManagement>
 
     <plugins>
 
       <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <version>3.5.4</version>
+        <configuration>
+          <argLine>@{argLine}</argLine>
+          <excludedGroups>server-integration, server-system, client-server-integration,
+            client-system</excludedGroups>
+        </configuration>
+      </plugin>
+
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-failsafe-plugin</artifactId>
+        <version>3.5.4</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>integration-test</goal>
+              <goal>verify</goal>
+            </goals>
+          </execution>
+        </executions>
       </plugin>
 
       <plugin>
@@ -152,78 +163,6 @@
         <configuration>
           <jmxPort>9009</jmxPort>
         </configuration>
-        <executions>
-          <execution>
-            <id>pre-integration-test</id>
-            <goals>
-              <goal>start</goal>
-            </goals>
-          </execution>
-          <execution>
-            <id>post-integration-test</id>
-            <goals>
-              <goal>stop</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-
-      <plugin>
-        <groupId>org.springdoc</groupId>
-        <artifactId>springdoc-openapi-maven-plugin</artifactId>
-        <version>1.5</version>
-        <executions>
-          <execution>
-            <phase>integration-test</phase>
-            <goals>
-              <goal>generate</goal>
-            </goals>
-          </execution>
-        </executions>
-        <configuration>
-          <apiDocsUrl>https://127.0.0.1:8443/v3/api-docs.yaml</apiDocsUrl>
-          <outputFileName>api-docs.yaml</outputFileName>
-          <outputDir>${project.basedir}/docs/api</outputDir>
-        </configuration>
-      </plugin>
-
-      <plugin>
-        <groupId>org.openapitools</groupId>
-        <artifactId>openapi-generator-maven-plugin</artifactId>
-        <version>7.17.0</version>
-        <executions>
-          <execution>
-            <phase>integration-test</phase>
-            <goals>
-              <goal>generate</goal>
-            </goals>
-            <configuration>
-              <generatorName>html2</generatorName>
-              <inputSpec>${project.basedir}/docs/api/api-docs.yaml</inputSpec>
-              <output>${project.basedir}/docs/api/</output>
-              <skipValidateSpec>true</skipValidateSpec>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-
-      <plugin>
-        <groupId>com.coderplus.maven.plugins</groupId>
-        <artifactId>copy-rename-maven-plugin</artifactId>
-        <version>1.0.1</version>
-        <executions>
-          <execution>
-            <id>copy-file</id>
-            <phase>integration-test</phase>
-            <goals>
-              <goal>rename</goal>
-            </goals>
-            <configuration>
-              <sourceFile>${project.basedir}/docs/api/index.html</sourceFile>
-              <destinationFile>${project.basedir}/docs/api/api-docs.html</destinationFile>
-            </configuration>
-          </execution>
-        </executions>
       </plugin>
 
       <plugin>
@@ -248,6 +187,73 @@
       </plugin>
 
     </plugins>
+
   </build>
 
+  <profiles>
+    <profile>
+      <id>generate-docs</id>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.springdoc</groupId>
+            <artifactId>springdoc-openapi-maven-plugin</artifactId>
+            <version>1.5</version>
+            <executions>
+              <execution>
+                <phase>integration-test</phase>
+                <goals>
+                  <goal>generate</goal>
+                </goals>
+              </execution>
+            </executions>
+            <configuration>
+              <apiDocsUrl>https://127.0.0.1:8443/v3/api-docs.yaml</apiDocsUrl>
+              <outputFileName>api-docs.yaml</outputFileName>
+              <outputDir>${project.basedir}/docs/api</outputDir>
+            </configuration>
+          </plugin>
+
+          <plugin>
+            <groupId>org.openapitools</groupId>
+            <artifactId>openapi-generator-maven-plugin</artifactId>
+            <version>7.17.0</version>
+            <executions>
+              <execution>
+                <phase>integration-test</phase>
+                <goals>
+                  <goal>generate</goal>
+                </goals>
+                <configuration>
+                  <generatorName>html2</generatorName>
+                  <inputSpec>${project.basedir}/docs/api/api-docs.yaml</inputSpec>
+                  <output>${project.basedir}/docs/api/</output>
+                  <skipValidateSpec>true</skipValidateSpec>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+
+          <plugin>
+            <groupId>com.coderplus.maven.plugins</groupId>
+            <artifactId>copy-rename-maven-plugin</artifactId>
+            <version>1.0.1</version>
+            <executions>
+              <execution>
+                <id>copy-file</id>
+                <phase>integration-test</phase>
+                <goals>
+                  <goal>rename</goal>
+                </goals>
+                <configuration>
+                  <sourceFile>${project.basedir}/docs/api/index.html</sourceFile>
+                  <destinationFile>${project.basedir}/docs/api/api-docs.html</destinationFile>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
+  </profiles>
 </project>
\ No newline at end of file
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index ef72af3..1b2e15f 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -18,6 +18,7 @@
         "@types/node": "^22",
         "@types/react": "^19.2.14",
         "@types/react-dom": "^19.2.3",
+        "@vitest/coverage-v8": "^4.1.10",
         "typescript": "^5.9.3",
         "vite": "^8.0.3",
         "vite-tsconfig-paths": "^5.1.4"
@@ -486,6 +487,16 @@
         "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/@emnapi/core": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.11.1.tgz",
@@ -1023,6 +1034,14 @@
       "dev": true,
       "license": "MIT"
     },
+    "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/@tybys/wasm-util": {
       "version": "0.10.3",
       "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.3.tgz",
@@ -1034,6 +1053,33 @@
         "tslib": "^2.4.0"
       }
     },
+    "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": "1.0.9",
+      "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
+      "integrity": "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/node": {
       "version": "22.20.1",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-22.20.1.tgz",
@@ -1064,6 +1110,155 @@
         "@types/react": "^19.2.0"
       }
     },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.1.10.tgz",
+      "integrity": "sha512-IM49HmthevbgAO4anp1hwtoT9wYe59w0LR00gr+eagHE+ZJ5lK4sLPeO0ubgoJcwLk6dehU3R24N+FbEEKDc8g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.2",
+        "@vitest/utils": "4.1.10",
+        "ast-v8-to-istanbul": "^1.0.0",
+        "istanbul-lib-coverage": "^3.2.2",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.2.0",
+        "magicast": "^0.5.2",
+        "obug": "^2.1.1",
+        "std-env": "^4.0.0-rc.1",
+        "tinyrainbow": "^3.1.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@vitest/browser": "4.1.10",
+        "vitest": "4.1.10"
+      },
+      "peerDependenciesMeta": {
+        "@vitest/browser": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/expect": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.1.10.tgz",
+      "integrity": "sha512-YsCn+qAk1GWjQOWFEsEcL2gNQ0zmVmQu3T03qP6UyjhtmdtwtbuI+DASn/7iQB3HGTXkdBwGddzxPlmiql5vlA==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@standard-schema/spec": "^1.1.0",
+        "@types/chai": "^5.2.2",
+        "@vitest/spy": "4.1.10",
+        "@vitest/utils": "4.1.10",
+        "chai": "^6.2.2",
+        "tinyrainbow": "^3.1.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/mocker": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.1.10.tgz",
+      "integrity": "sha512-v0xaezt+DKEmKfaxg133ldzADrwLGd7Ze1MfQQTYfvs8OqZIwbxyxaYURivwV7sWy5fqn3rH5uOrSp07bp44Ow==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@vitest/spy": "4.1.10",
+        "estree-walker": "^3.0.3",
+        "magic-string": "^0.30.21"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "msw": "^2.4.9",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "msw": {
+          "optional": true
+        },
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/pretty-format": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.1.10.tgz",
+      "integrity": "sha512-W1HsjSH4MXQ9YfmmhLAoIYf1HRfekQCGngeIgcei6MP5QQGWUe0gkopdZQaVCFO+JDJMrAJGwa5pRpNpvy4P8Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tinyrainbow": "^3.1.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/runner": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-4.1.10.tgz",
+      "integrity": "sha512-IKI6kpIH+LmpROplyLwBBaCfMgOZOMsygVa6BARD6ahA04VRuJSa6OaVG7kRvSEMD870Vd91rSSw0eegtWyLGg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@vitest/utils": "4.1.10",
+        "pathe": "^2.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/snapshot": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-4.1.10.tgz",
+      "integrity": "sha512-xRkfOT1qpTAi/Ti4Y1LtfRc3kEuqxGw59eN2jN9pRWMtS/XDevekhcFSqvQqjUNGksfjMJu3Y+oJ+4Ypn2OaJw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@vitest/pretty-format": "4.1.10",
+        "@vitest/utils": "4.1.10",
+        "magic-string": "^0.30.21",
+        "pathe": "^2.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/spy": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-4.1.10.tgz",
+      "integrity": "sha512-PLf/Ugvoq5wO/b4rwYCR1h2PSIdXz7wnkQFMiUpLdtM7l6pqVFcQIBEHyT1+l+cj7mNwAfZHzqXqDyjvOuwbDw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/utils": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-4.1.10.tgz",
+      "integrity": "sha512-fy9am/HWxbaGt/Sawrp90vt6Y6jQwf1RX77cz3uwoJwJVMli/e1IEwRPnMNJ7vKfPTwo0diXifkpPvwH9v7nGA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/pretty-format": "4.1.10",
+        "convert-source-map": "^2.0.0",
+        "tinyrainbow": "^3.1.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
     "node_modules/accepts": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/accepts/-/accepts-2.0.0.tgz",
@@ -1093,6 +1288,36 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/assertion-error": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
+      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
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+      "license": "MIT",
+      "peer": true,
+      "engines": {
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+      }
+    },
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+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/ast-v8-to-istanbul/-/ast-v8-to-istanbul-1.0.5.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
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+        "estree-walker": "^3.0.3",
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+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-10.0.0.tgz",
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@@ -1273,6 +1498,17 @@
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       "license": "CC-BY-4.0"
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+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.2.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=18"
+      }
+    },
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       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-5.0.0.tgz",
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       "license": "MIT"
     },
+    "node_modules/estree-walker": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-3.0.3.tgz",
+      "integrity": "sha512-7RUKfXgSMMkzt6ZuXmqapOurLGPPfgj6l9uRZ7lRGolvk0y2yocc35LdcxKC5PQZdn2DMqioAQ2NoWcrTKmm6g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/estree": "^1.0.0"
+      }
+    },
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       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/etag/-/etag-1.8.1.tgz",
@@ -1563,6 +1809,17 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/expect-type": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/expect-type/-/expect-type-1.4.0.tgz",
+      "integrity": "sha512-KfYbmpRm0VbLjEvVa9yGwCi9GI34xvi7A/HXYWQO65CSD2u3MczUJSuwXKFIxlGsgBQizV9q5J9NHj4VG0n+pA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "peer": true,
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/express": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/express/-/express-5.2.1.tgz",
@@ -1772,6 +2029,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1796,6 +2063,13 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/html-escaper": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
+      "integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/http-errors": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.1.tgz",
@@ -1862,6 +2136,45 @@
         "node": ">=18"
       }
     },
+    "node_modules/istanbul-lib-coverage": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.2.tgz",
+      "integrity": "sha512-O8dpsF+r0WV/8MNRKfnmrtCWhuKjxrq2w+jpzBL5UZKTi2LeVWnWOmWRxFlesJONmc+wLAGvKQZEOanko0LFTg==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/istanbul-lib-report": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
+      "integrity": "sha512-GCfE1mtsHGOELCU8e/Z7YWzpmybrx/+dSTfLrvY8qRmaY6zXTKWn6WQIjaAFw069icm6GVMNkgu0NzI4iPZUNw==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "istanbul-lib-coverage": "^3.0.0",
+        "make-dir": "^4.0.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/istanbul-reports": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.2.0.tgz",
+      "integrity": "sha512-HGYWWS/ehqTV3xN10i23tkPkpH46MLCIMFNCaaKNavAXTF1RkqxawEPtnjnGZ6XKSInBKkiOA5BKS+aZiY3AvA==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "html-escaper": "^2.0.0",
+        "istanbul-lib-report": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/js-tokens": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -2185,6 +2498,45 @@
         "yallist": "^3.0.2"
       }
     },
+    "node_modules/magic-string": {
+      "version": "0.30.21",
+      "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.30.21.tgz",
+      "integrity": "sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@jridgewell/sourcemap-codec": "^1.5.5"
+      }
+    },
+    "node_modules/magicast": {
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/magicast/-/magicast-0.5.3.tgz",
+      "integrity": "sha512-pVKE4UdSQ7DvHzivsCIFx2BJn1mHG6KsyrFcaxFx6tONdneEuThrDx0Cj3AMg58KyN4pzYT+LHOotxDQDjNvkw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.29.3",
+        "@babel/types": "^7.29.0",
+        "source-map-js": "^1.2.1"
+      }
+    },
+    "node_modules/make-dir": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
+      "integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "semver": "^7.5.3"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -2331,6 +2683,20 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/obug": {
+      "version": "2.1.4",
+      "resolved": "https://registry.npmjs.org/obug/-/obug-2.1.4.tgz",
+      "integrity": "sha512-4a+OsYv9UktOJKE+l1A4OufDgdRF9PifWj+tJnHURo/P+WOxpG4GzUFL9qCalmWauao6ogiG+QvnCovwPoyAWA==",
+      "dev": true,
+      "funding": [
+        "https://github.com/sponsors/sxzz",
+        "https://opencollective.com/debug"
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=12.20.0"
+      }
+    },
     "node_modules/on-finished": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/on-finished/-/on-finished-2.4.1.tgz",
@@ -2818,6 +3184,14 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/siginfo": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
+      "integrity": "sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==",
+      "dev": true,
+      "license": "ISC",
+      "peer": true
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -2847,6 +3221,14 @@
         "source-map": "^0.6.0"
       }
     },
+    "node_modules/stackback": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
+      "integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
     "node_modules/statuses": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
@@ -2856,6 +3238,45 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/std-env": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/std-env/-/std-env-4.2.0.tgz",
+      "integrity": "sha512-oCUKSupKTHX53EyjDtuZQ64pjLJ6yYCtpmEw0goYxtjG9KpbRe8KAsl2tBUGU9DyMcJ0RwJ8GqJAFzMXcXW1Rw==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/tinybench": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+      "integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
+    "node_modules/tinyexec": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.2.4.tgz",
+      "integrity": "sha512-SHf/r48b7vOrjve9PxJo3MN5v5yuyjHvdUcrQffT3WXMUfnGmHDVbC4k3sHJaJTgZCwpUplIaAo5ANtMyp3YHg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.17",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",
@@ -2873,6 +3294,16 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tinyrainbow": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.1.0.tgz",
+      "integrity": "sha512-Bf+ILmBgretUrdJxzXM0SgXLZ3XfiaUuOj/IKQHuTXip+05Xn+uyEYdVg0kYDipTBcLrCVyUzAPz7QmArb0mmw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -3126,6 +3557,115 @@
         }
       }
     },
+    "node_modules/vitest": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.10.tgz",
+      "integrity": "sha512-R9jUTe5S4Qb0HCd4TNqpC7oGcrMssMRGXLW80ubjWsW9VH5GF8y1Y0SFLY9AbqSk6nt0PnOx4H4WNJYZ13GUPw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@vitest/expect": "4.1.10",
+        "@vitest/mocker": "4.1.10",
+        "@vitest/pretty-format": "4.1.10",
+        "@vitest/runner": "4.1.10",
+        "@vitest/snapshot": "4.1.10",
+        "@vitest/spy": "4.1.10",
+        "@vitest/utils": "4.1.10",
+        "es-module-lexer": "^2.0.0",
+        "expect-type": "^1.3.0",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^4.0.0-rc.1",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.1.0",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0",
+        "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": "4.1.10",
+        "@vitest/browser-preview": "4.1.10",
+        "@vitest/browser-webdriverio": "4.1.10",
+        "@vitest/coverage-istanbul": "4.1.10",
+        "@vitest/coverage-v8": "4.1.10",
+        "@vitest/ui": "4.1.10",
+        "happy-dom": "*",
+        "jsdom": "*",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "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/coverage-istanbul": {
+          "optional": true
+        },
+        "@vitest/coverage-v8": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        },
+        "vite": {
+          "optional": false
+        }
+      }
+    },
+    "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"
+      }
+    },
     "node_modules/wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index d0d1c3f..d7cc44c 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -6,7 +6,10 @@
     "build": "react-router build",
     "dev": "react-router dev",
     "start": "react-router-serve ./build/server/index.js",
-    "typecheck": "react-router typegen && tsc"
+    "typecheck": "react-router typegen && tsc",
+    "test": "vitest",
+    "test:unit": "vitest run",
+    "test:coverage": "vitest run --coverage"
   },
   "dependencies": {
     "@react-router/node": "8.0.0",
@@ -21,6 +24,7 @@
     "@types/node": "^22",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@vitest/coverage-v8": "^4.1.10",
     "typescript": "^5.9.3",
     "vite": "^8.0.3",
     "vite-tsconfig-paths": "^5.1.4"
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 6f78fe0..d3385e7 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -15,4 +15,12 @@ export default defineConfig(({ }) => ({
       },
     },
   },
-}));
\ No newline at end of file
+  test: {
+    coverage: {
+      reporter: [
+        'text',
+        'lcov'
+      ]
+    }
+  }
+}));
diff --git a/sonar-project.properties b/sonar-project.properties
new file mode 100644
index 0000000..f98a6f0
--- /dev/null
+++ b/sonar-project.properties
@@ -0,0 +1,12 @@
+sonar.organization=codeurjc_students
+sonar.projectKey=codeurjc-students_2026-PCMod
+sonar.projectName=2026-PCMod
+
+sonar.sources=backend/pcmod/src/main/java,frontend/app
+sonar.java.binaries=backend/pcmod/target/classes
+
+sonar.coverage.jacoco.xmlReportPaths=backend/pcmod/target/site/jacoco/jacoco.xml
+sonar.javascript.lcov.reportPaths=frontend/coverage/lcov.info
+
+sonar.exclusions=backend/pcmod/target/**,frontend/node_modules/**,frontend/dist/**,frontend/build/**
+sonar.qualitygate.wait=true
\ No newline at end of file