diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d0bb843..3f03d39 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,10 +44,10 @@ jobs:
 
     steps:
       - name: Baixar código
-        uses: actions/checkout@v4
+        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
 
       - name: Configurar Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.12"
 
@@ -71,7 +71,7 @@ jobs:
       working-directory: frontend
       install-command: npm ci
       lint-command: npm run lint
-      test-command: ""
+      test-command: npm test
       build-command: npm run build
       artifact-path: dist
       upload-artifact: false
diff --git a/backend/Dockerfile b/backend/Dockerfile
index 80d329f..101f66c 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -5,6 +5,11 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
 
 WORKDIR /app
 
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get upgrade -y --no-install-recommends && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
 COPY requirements.txt .
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt && \
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 86934b6..c0041a5 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -16,6 +16,7 @@
       },
       "devDependencies": {
         "@eslint/js": "^10.0.1",
+        "@testing-library/react": "^16.3.2",
         "@types/react": "^18.3.18",
         "@types/react-dom": "^18.3.5",
         "@vitejs/plugin-react": "^4.3.4",
@@ -23,11 +24,64 @@
         "eslint-plugin-react-hooks": "^7.1.1",
         "eslint-plugin-react-refresh": "^0.5.3",
         "globals": "^17.7.0",
+        "jsdom": "^29.1.1",
         "typescript": "^5.7.2",
         "typescript-eslint": "^8.65.0",
-        "vite": "^6.4.3"
+        "vite": "^6.4.3",
+        "vitest": "^4.1.11"
       }
     },
+    "node_modules/@asamuzakjp/css-color": {
+      "version": "5.1.11",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/css-color/-/css-color-5.1.11.tgz",
+      "integrity": "sha512-KVw6qIiCTUQhByfTd78h2yD1/00waTmm9uy/R7Ck/ctUyAPj+AEDLkQIdJW0T8+qGgj3j5bpNKK7Q3G+LedJWg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@asamuzakjp/generational-cache": "^1.0.1",
+        "@csstools/css-calc": "^3.2.0",
+        "@csstools/css-color-parser": "^4.1.0",
+        "@csstools/css-parser-algorithms": "^4.0.0",
+        "@csstools/css-tokenizer": "^4.0.0"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      }
+    },
+    "node_modules/@asamuzakjp/dom-selector": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/dom-selector/-/dom-selector-7.1.1.tgz",
+      "integrity": "sha512-67RZDnYRc8H/8MLDgQCDE//zoqVFwajkepHZgmXrbwybzXOEwOWGPYGmALYl9J2DOLfFPPs6kKCqmbzV895hTQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@asamuzakjp/generational-cache": "^1.0.1",
+        "@asamuzakjp/nwsapi": "^2.3.9",
+        "bidi-js": "^1.0.3",
+        "css-tree": "^3.2.1",
+        "is-potential-custom-element-name": "^1.0.1"
+      },
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      }
+    },
+    "node_modules/@asamuzakjp/generational-cache": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/generational-cache/-/generational-cache-1.0.1.tgz",
+      "integrity": "sha512-wajfB8KqzMCN2KGNFdLkReeHncd0AslUSrvHVvvYWuU8ghncRJoA50kT3zP9MVL0+9g4/67H+cdvBskj9THPzg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      }
+    },
+    "node_modules/@asamuzakjp/nwsapi": {
+      "version": "2.3.9",
+      "resolved": "https://registry.npmjs.org/@asamuzakjp/nwsapi/-/nwsapi-2.3.9.tgz",
+      "integrity": "sha512-n8GuYSrI9bF7FFZ/SjhwevlHc8xaVlb/7HmHelnc/PZXBD2ZR49NnN9sMMuDdEGPeeRQ5d0hqlSlEpgCX3Wl0Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@babel/code-frame": {
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz",
@@ -309,6 +363,159 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@bramus/specificity": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/@bramus/specificity/-/specificity-2.4.2.tgz",
+      "integrity": "sha512-ctxtJ/eA+t+6q2++vj5j7FYX3nRu311q1wfYH3xjlLOsczhlhxAg2FWNUXhpGvAw3BWo1xBcvOV6/YLc2r5FJw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "css-tree": "^3.0.0"
+      },
+      "bin": {
+        "specificity": "bin/cli.js"
+      }
+    },
+    "node_modules/@csstools/color-helpers": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-6.1.1.tgz",
+      "integrity": "sha512-gLNsunvwf3mCi5u5o46/Z/JcJMnhbHSaZ69rkgPzNM3J4s8hWwpPUQB6/tt0EDFyCiWzxANlx+2LJwpYj4zS1w==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT-0",
+      "engines": {
+        "node": ">=20.19.0"
+      }
+    },
+    "node_modules/@csstools/css-calc": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/@csstools/css-calc/-/css-calc-3.3.0.tgz",
+      "integrity": "sha512-c5ihYsPkdG6JCkU2zTMm4+k6r7RXuGxtWYhu5DHMIiF1FHzrfmHL5so11AoFpUv/tu61xfcmT4AmKoFfMPoqdQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=20.19.0"
+      },
+      "peerDependencies": {
+        "@csstools/css-parser-algorithms": "^4.0.0",
+        "@csstools/css-tokenizer": "^4.0.0"
+      }
+    },
+    "node_modules/@csstools/css-color-parser": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/@csstools/css-color-parser/-/css-color-parser-4.2.0.tgz",
+      "integrity": "sha512-5+5LEmFuY1AjXdYhmgjTJogtQnP1evJ1zrBZGUNZ0thkpwnnmKxcHdAMn/OtFjAb25zA+jKDVYVRl+5G7rjv1A==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "@csstools/color-helpers": "^6.1.1",
+        "@csstools/css-calc": "^3.3.0"
+      },
+      "engines": {
+        "node": ">=20.19.0"
+      },
+      "peerDependencies": {
+        "@csstools/css-parser-algorithms": "^4.0.0",
+        "@csstools/css-tokenizer": "^4.0.0"
+      }
+    },
+    "node_modules/@csstools/css-parser-algorithms": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@csstools/css-parser-algorithms/-/css-parser-algorithms-4.0.0.tgz",
+      "integrity": "sha512-+B87qS7fIG3L5h3qwJ/IFbjoVoOe/bpOdh9hAjXbvx0o8ImEmUsGXN0inFOnk2ChCFgqkkGFQ+TpM5rbhkKe4w==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=20.19.0"
+      },
+      "peerDependencies": {
+        "@csstools/css-tokenizer": "^4.0.0"
+      }
+    },
+    "node_modules/@csstools/css-syntax-patches-for-csstree": {
+      "version": "1.1.8",
+      "resolved": "https://registry.npmjs.org/@csstools/css-syntax-patches-for-csstree/-/css-syntax-patches-for-csstree-1.1.8.tgz",
+      "integrity": "sha512-CpMLjAvwQg3BL5S0IeqsZNMH7EQrEWi0kLKOC13ZBF0ZwERiLWlibNPJr8G1kdU3Ms/r2KiNrF81pUh2HwAHdg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT-0",
+      "peerDependencies": {
+        "css-tree": "^3.2.1"
+      },
+      "peerDependenciesMeta": {
+        "css-tree": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@csstools/css-tokenizer": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/@csstools/css-tokenizer/-/css-tokenizer-4.0.0.tgz",
+      "integrity": "sha512-QxULHAm7cNu72w97JUNCBFODFaXpbDg+dP8b/oWFAZ2MTRppA3U00Y2L1HqaS4J6yBqxwa/Y3nMBaxVKbB/NsA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/csstools"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/csstools"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=20.19.0"
+      }
+    },
     "node_modules/@emotion/babel-plugin": {
       "version": "11.13.5",
       "resolved": "https://registry.npmjs.org/@emotion/babel-plugin/-/babel-plugin-11.13.5.tgz",
@@ -999,6 +1206,24 @@
         "node": "^20.19.0 || ^22.13.0 || >=24"
       }
     },
+    "node_modules/@exodus/bytes": {
+      "version": "1.15.1",
+      "resolved": "https://registry.npmjs.org/@exodus/bytes/-/bytes-1.15.1.tgz",
+      "integrity": "sha512-S6mL0yNB/Abt9Ei4tq8gDhcczc4S3+vQ4ra7vxnAf+YHC02srtqxKKZghx2Dq6p0e66THKwR6r8N6P95wEty7Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0"
+      },
+      "peerDependencies": {
+        "@noble/hashes": "^1.8.0 || ^2.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@noble/hashes": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@floating-ui/core": {
       "version": "1.7.5",
       "resolved": "https://registry.npmjs.org/@floating-ui/core/-/core-1.7.5.tgz",
@@ -1541,6 +1766,63 @@
       "integrity": "sha512-e7Mew686owMaPJVNNLs55PUvgz371nKgwsc4vxE49zsODpJEnxgxRo2y/OKrqueavXgZNMDVj3DdHFlaSAeU8g==",
       "license": "MIT"
     },
+    "node_modules/@testing-library/dom": {
+      "version": "10.4.1",
+      "resolved": "https://registry.npmjs.org/@testing-library/dom/-/dom-10.4.1.tgz",
+      "integrity": "sha512-o4PXJQidqJl82ckFaXUeoAW+XysPLauYI43Abki5hABd853iMhitooc6znOnczgbTYmEP6U6/y1ZyKAIsvMKGg==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@babel/code-frame": "^7.10.4",
+        "@babel/runtime": "^7.12.5",
+        "@types/aria-query": "^5.0.1",
+        "aria-query": "5.3.0",
+        "dom-accessibility-api": "^0.5.9",
+        "lz-string": "^1.5.0",
+        "picocolors": "1.1.1",
+        "pretty-format": "^27.0.2"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@testing-library/react": {
+      "version": "16.3.2",
+      "resolved": "https://registry.npmjs.org/@testing-library/react/-/react-16.3.2.tgz",
+      "integrity": "sha512-XU5/SytQM+ykqMnAnvB2umaJNIOsLF3PVv//1Ew4CTcpz0/BRyy/af40qqrt7SjKpDdT1saBMc42CUok5gaw+g==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.12.5"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@testing-library/dom": "^10.0.0",
+        "@types/react": "^18.0.0 || ^19.0.0",
+        "@types/react-dom": "^18.0.0 || ^19.0.0",
+        "react": "^18.0.0 || ^19.0.0",
+        "react-dom": "^18.0.0 || ^19.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        },
+        "@types/react-dom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@types/aria-query": {
+      "version": "5.0.4",
+      "resolved": "https://registry.npmjs.org/@types/aria-query/-/aria-query-5.0.4.tgz",
+      "integrity": "sha512-rfT93uj5s0PRL7EzccGMs3brplhcrghnDoV26NqKhCAS1hVo+WdNsPvE/yb6ilfr5hi2MEk6d5EWJTKdxg8jVw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",
@@ -1586,6 +1868,17 @@
         "@babel/types": "^7.28.2"
       }
     },
+    "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",
+      "dependencies": {
+        "@types/deep-eql": "*",
+        "assertion-error": "^2.0.1"
+      }
+    },
     "node_modules/@types/d3-array": {
       "version": "3.2.2",
       "resolved": "https://registry.npmjs.org/@types/d3-array/-/d3-array-3.2.2.tgz",
@@ -1649,6 +1942,13 @@
       "integrity": "sha512-Ps3T8E8dZDam6fUyNiMkekK3XUsaUEik+idO9/YjPtfj2qruF8tFBXS7XhtE4iIXBLxhmLjP3SXpLhVf21I9Lw==",
       "license": "MIT"
     },
+    "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"
+    },
     "node_modules/@types/esrecurse": {
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/@types/esrecurse/-/esrecurse-4.3.1.tgz",
@@ -1981,6 +2281,119 @@
         "vite": "^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
       }
     },
+    "node_modules/@vitest/expect": {
+      "version": "4.1.11",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.1.11.tgz",
+      "integrity": "sha512-VX2x5vNJXET47KAFzwERI+KRMtTTCSWTfSMKsW7JsUsXV4psq++e3DvZpuTDOpHcxytiDs6p2nhVb2tVDiiUYw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@standard-schema/spec": "^1.1.0",
+        "@types/chai": "^5.2.2",
+        "@vitest/spy": "4.1.11",
+        "@vitest/utils": "4.1.11",
+        "chai": "^6.2.2",
+        "tinyrainbow": "^3.1.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/mocker": {
+      "version": "4.1.11",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-4.1.11.tgz",
+      "integrity": "sha512-2XJVD55d1o5AZous5CCGKS74g/riOj9odEt2bQpCVZeblHyHdnMeFl4jl0XjU21stf4mbjUkew2eXQZt65g5CQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/spy": "4.1.11",
+        "estree-walker": "^3.0.3",
+        "magic-string": "^0.30.21"
+      },
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+        "url": "https://opencollective.com/vitest"
+      },
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+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "msw": {
+          "optional": true
+        },
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/pretty-format": {
+      "version": "4.1.11",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-4.1.11.tgz",
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+      "dependencies": {
+        "@vitest/pretty-format": "4.1.11",
+        "@vitest/utils": "4.1.11",
+        "magic-string": "^0.30.21",
+        "pathe": "^2.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
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@@ -3591,6 +4331,19 @@
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@@ -3633,6 +4386,13 @@
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@@ -3652,6 +4412,20 @@
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@@ -3670,12 +4444,36 @@
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@@ -3693,6 +4491,62 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
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@@ -3757,6 +4611,16 @@
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@@ -3918,6 +4782,144 @@
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+        "@vitest/browser-webdriverio": {
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+        "@vitest/coverage-istanbul": {
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+        "@vitest/ui": {
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+      "license": "MIT",
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+      "dev": true,
+      "license": "BSD-2-Clause",
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+      "dev": true,
+      "license": "MIT",
+      "engines": {
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+    "node_modules/whatwg-url": {
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+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-16.0.1.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
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+        "tr46": "^6.0.0",
+        "webidl-conversions": "^8.0.1"
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       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -3934,6 +4936,23 @@
         "node": ">= 8"
       }
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+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
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+        "why-is-node-running": "cli.js"
+      },
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       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
@@ -3944,6 +4963,23 @@
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+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz",
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+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
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+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
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diff --git a/frontend/package.json b/frontend/package.json
index 09afde4..9dfdece 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -6,6 +6,7 @@
   "scripts": {
     "dev": "vite --host 0.0.0.0",
     "lint": "eslint .",
+    "test": "vitest run",
     "build": "tsc && vite build",
     "preview": "vite preview --host 0.0.0.0"
   },
@@ -18,6 +19,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
+    "@testing-library/react": "^16.3.2",
     "@types/react": "^18.3.18",
     "@types/react-dom": "^18.3.5",
     "@vitejs/plugin-react": "^4.3.4",
@@ -25,8 +27,10 @@
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     "eslint-plugin-react-refresh": "^0.5.3",
     "globals": "^17.7.0",
+    "jsdom": "^29.1.1",
     "typescript": "^5.7.2",
     "typescript-eslint": "^8.65.0",
-    "vite": "^6.4.3"
+    "vite": "^6.4.3",
+    "vitest": "^4.1.11"
   }
 }
diff --git a/frontend/src/App.test.tsx b/frontend/src/App.test.tsx
new file mode 100644
index 0000000..c3e6389
--- /dev/null
+++ b/frontend/src/App.test.tsx
@@ -0,0 +1,143 @@
+import { render, screen, within } from "@testing-library/react";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import App from "./App";
+import { AuthProvider } from "./auth/AuthContext";
+import type { DashboardSummary, User, UserRole } from "./types";
+
+const now = "2026-08-24T12:00:00.000Z";
+
+function user(role: UserRole): User {
+  return {
+    id: 1,
+    name: "Ana Silva",
+    email: "ana@example.com",
+    role,
+    is_active: true,
+    created_at: now,
+    updated_at: now
+  };
+}
+
+function service(id: number, name: string, current_status: "online" | "degraded" | "offline") {
+  return {
+    id,
+    name,
+    description: null,
+    environment: "production" as const,
+    healthcheck_url: `https://example.com/${id}/health`,
+    owner: "SRE",
+    responsible_id: null,
+    is_active: true,
+    created_at: now,
+    updated_at: now,
+    current_status,
+    last_http_status_code: current_status === "offline" ? 503 : 200,
+    last_response_time_ms: current_status === "degraded" ? 950 : 120,
+    last_checked_at: now
+  };
+}
+
+const dashboardSummary: DashboardSummary = {
+  total_services: 3,
+  online_services: 1,
+  offline_services: 1,
+  degraded_services: 1,
+  inactive_services: 0,
+  average_response_time_ms: 397,
+  overall_uptime_percent: 66.67,
+  open_incidents: 1,
+  failures_last_24h: 1,
+  recent_failures: [
+    {
+      id: 10,
+      service_id: 3,
+      status: "offline",
+      http_status_code: 503,
+      response_time_ms: null,
+      error_message: "Connection refused",
+      checked_at: now
+    }
+  ],
+  recent_incidents: [
+    {
+      id: 20,
+      service_id: 3,
+      service_name: "Billing API",
+      status: "open",
+      started_at: now,
+      resolved_at: null,
+      duration_seconds: null,
+      reason: "HTTP 503",
+      last_error_message: "Connection refused",
+      created_at: now,
+      updated_at: now
+    }
+  ],
+  recent_notifications: [],
+  failed_notifications: [],
+  unstable_services: [],
+  slowest_services: [],
+  services: [
+    service(1, "Gateway API", "online"),
+    service(2, "Search API", "degraded"),
+    service(3, "Billing API", "offline")
+  ]
+};
+
+function mockDashboardRequest(): void {
+  vi.stubGlobal(
+    "fetch",
+    vi.fn(async () => new Response(JSON.stringify(dashboardSummary), { status: 200 }))
+  );
+}
+
+function renderAuthenticatedApp(role: UserRole, path = "/dashboard"): void {
+  localStorage.setItem("sentinel_token", "test-token");
+  localStorage.setItem("sentinel_user", JSON.stringify(user(role)));
+  window.history.pushState(null, "", path);
+
+  render(
+    <AuthProvider>
+      <App />
+    </AuthProvider>
+  );
+}
+
+describe("App dashboard", () => {
+  beforeEach(() => {
+    mockDashboardRequest();
+  });
+
+  it("renders monitored services with online, degraded and offline states", async () => {
+    renderAuthenticatedApp("ADMIN");
+
+    const gatewayRow = await screen.findByRole("row", { name: /Gateway API/i });
+    const searchRow = screen.getByRole("row", { name: /Search API/i });
+    const billingRow = screen.getByRole("row", { name: /Billing API/i });
+
+    expect(within(gatewayRow).getByText("Online")).toBeTruthy();
+    expect(within(searchRow).getByText("Degradado")).toBeTruthy();
+    expect(within(billingRow).getByText("Offline")).toBeTruthy();
+  });
+
+  it("shows recent incident context on the operational dashboard", async () => {
+    renderAuthenticatedApp("ADMIN");
+
+    const incidentsPanel = await screen.findByText("Incidentes recentes");
+    const panel = incidentsPanel.closest(".panel");
+
+    expect(panel).not.toBeNull();
+    expect(within(panel as HTMLElement).getByText("Billing API")).toBeTruthy();
+    expect(within(panel as HTMLElement).getByText("HTTP 503")).toBeTruthy();
+    expect(within(panel as HTMLElement).getByText("Aberto")).toBeTruthy();
+  });
+
+  it("prevents a viewer from accessing user management", async () => {
+    renderAuthenticatedApp("VIEWER", "/users");
+
+    expect(await screen.findByText("Dashboard operacional")).toBeTruthy();
+    expect(screen.queryByRole("heading", { name: "Usuários" })).toBeNull();
+    expect(screen.queryByRole("button", { name: "Usuários" })).toBeNull();
+  });
+});
diff --git a/frontend/src/components/StatusBadge.test.tsx b/frontend/src/components/StatusBadge.test.tsx
new file mode 100644
index 0000000..fcf48a2
--- /dev/null
+++ b/frontend/src/components/StatusBadge.test.tsx
@@ -0,0 +1,16 @@
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it } from "vitest";
+
+import { StatusBadge } from "./StatusBadge";
+
+describe("StatusBadge", () => {
+  it.each([
+    ["online", "Online"],
+    ["degraded", "Degradado"],
+    ["offline", "Offline"]
+  ] as const)("renders the %s operational state", (status, label) => {
+    render(<StatusBadge status={status} />);
+
+    expect(screen.getByText(label)).toBeTruthy();
+  });
+});
diff --git a/frontend/src/test/setup.ts b/frontend/src/test/setup.ts
new file mode 100644
index 0000000..1c19f2a
--- /dev/null
+++ b/frontend/src/test/setup.ts
@@ -0,0 +1,8 @@
+import { cleanup } from "@testing-library/react";
+import { afterEach, vi } from "vitest";
+
+afterEach(() => {
+  cleanup();
+  localStorage.clear();
+  vi.unstubAllGlobals();
+});
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index f7d2ef6..872f613 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -1,8 +1,14 @@
+/// <reference types="vitest/config" />
+
 import { defineConfig } from "vite";
 import react from "@vitejs/plugin-react";
 
 export default defineConfig({
   plugins: [react()],
+  test: {
+    environment: "jsdom",
+    setupFiles: "./src/test/setup.ts"
+  },
   server: {
     port: 5173,
     proxy: {