diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index d9293a7..ddf26ce 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -19,7 +19,8 @@
         "autoprefixer": "^10.4.18",
         "postcss": "^8.4.35",
         "tailwindcss": "^3.4.1",
-        "vite": "^5.1.6"
+        "vite": "^5.1.6",
+        "vitest": "^4.1.10"
       }
     },
     "node_modules/@alloc/quick-lru": {
@@ -81,6 +82,40 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@emnapi/core": {
+      "version": "1.11.1",
+      "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.11.1.tgz",
+      "integrity": "sha512-RSvbQmHzdKzNsLYa/wHrbc3KN4sYLKAdPZxqiM2HATqv/SBk2/ENSHpvXGaLOMcsAyz0poEGqkmmKYG3OWiJEQ==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/wasi-threads": "1.2.2",
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/runtime": {
+      "version": "1.11.1",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.11.1.tgz",
+      "integrity": "sha512-vgj7R3y3Wgx24IQaGPA/R6YFXLHVMOZ0uVEyIQPaWs+rd1AzfEMXlAC22FYwO1XkKR6NPsq7mUandH8oIRdZFw==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
+    "node_modules/@emnapi/wasi-threads": {
+      "version": "1.2.2",
+      "resolved": "https://registry.npmjs.org/@emnapi/wasi-threads/-/wasi-threads-1.2.2.tgz",
+      "integrity": "sha512-c95qOXkHdydNKhscBTebqEC1CVAZpyqOfVfBzQ1qgzyl3gfeldUjIggDbIZgDKsHLgnsM+igH7TJ/eAasaVuMA==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@esbuild/aix-ppc64": {
       "version": "0.21.5",
       "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.21.5.tgz",
@@ -781,6 +816,25 @@
         "url": "https://github.com/sponsors/Brooooooklyn"
       }
     },
+    "node_modules/@napi-rs/wasm-runtime": {
+      "version": "1.1.6",
+      "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-1.1.6.tgz",
+      "integrity": "sha512-ZLv/JdUfkvOy9eCnnBaGfiO+XimbjebAeO+MRQqD/B+FR1tnRN0tpKSJHRbE8sFfS6aqsXZ67TQjfwfsxULVbg==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@tybys/wasm-util": "^0.10.3"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Brooooooklyn"
+      },
+      "peerDependencies": {
+        "@emnapi/core": "^1.7.1",
+        "@emnapi/runtime": "^1.7.1"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -819,6 +873,298 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@oxc-project/types": {
+      "version": "0.139.0",
+      "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.139.0.tgz",
+      "integrity": "sha512-r9gHphtCs+1M7J0pw6Sn/hh/Wpa/iQrOOkrNAlVLF/gHq+/CJmHIWKKUUhdWjcD6CIa8idarspCsASiXCXvFUw==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/Boshen"
+      }
+    },
+    "node_modules/@rolldown/binding-android-arm64": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.1.5.tgz",
+      "integrity": "sha512-lZg8fqIv2v7FF237bwMgzGZEJvGL79/s5knJ/i6FmsGF4XXlzccZ4jb+TrFIxtSSxFtIpdsgrPZeMk1I9AFcyQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-arm64": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.1.5.tgz",
+      "integrity": "sha512-51Bnx9pNiMRKSUNtBfySkNJ9vMU9Hh3I1ozDd6gyPPYzaXCfnptUcEZxXGYFn+ul2dtcMUiqGR1Yai2K10uoTw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-x64": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.1.5.tgz",
+      "integrity": "sha512-Tm+gbfC0aHu1tBA/JvKQh32S0K6YgCHkiAF4/W6xX0K0RmNuc94VeK419dJoE65R5aRxmo+noZQSWrAMF6yb6g==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-freebsd-x64": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.1.5.tgz",
+      "integrity": "sha512-JMzDKCCXq93YccG5gz3hvOs1oXRKAf0XYpfOS88e+wZrC8Iugj6j68867vrYZkvpDDpKn/KoKORThmchMpF6TA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm-gnueabihf": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.1.5.tgz",
+      "integrity": "sha512-uML21j2K5TfPGutKxub+M+nLjZIrWjXQ5Grx4lCe/nimTj9B4L63zHpjXLl4y0L3mcm2htEQIb06oCG/szerNw==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm64-gnu": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.1.5.tgz",
+      "integrity": "sha512-navSiuTMogvnQoZoM/v+l3ZWo50/NTwSHSzheABx/RCnmUPaKwq9qSo4Br2OYRs21+Fz8uFqITZM3H4opOB0/Q==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-arm64-musl": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-musl/-/binding-linux-arm64-musl-1.1.5.tgz",
+      "integrity": "sha512-lAryqH7IteztmCXQXk0etKj4wBQ7Gx5S6LjKhsgp9zb8I5bsuvU/2llH1hDQcjsFeqIsovMVN339/8pUDDBXxA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-ppc64-gnu": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-ppc64-gnu/-/binding-linux-ppc64-gnu-1.1.5.tgz",
+      "integrity": "sha512-fsK/sNBnxzBlL4O1JNrZakVQxPspqpED5dLtNsZS9oOKmtSpdNIzxH2kkol5HYTWJN47sE20ztMJPxfZ89qGOg==",
+      "cpu": [
+        "ppc64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-s390x-gnu": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-s390x-gnu/-/binding-linux-s390x-gnu-1.1.5.tgz",
+      "integrity": "sha512-gLYb4BIadlfTOYT5gO503n8zQjXflgzpD0FcyKh0Mzx3rqCZKnHoJWV9xe1KXUJ5lx2JfcSHr/mhzS0PC/McAA==",
+      "cpu": [
+        "s390x"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-x64-gnu": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-gnu/-/binding-linux-x64-gnu-1.1.5.tgz",
+      "integrity": "sha512-FjcpEKUyJygHgs1o50VYNvkt5+7Le/VEdYt0AkRpkL33MnyQfwr8l5mXwMmfmTbyMPr5vJLC+8/Gd9gXnwU1QQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-linux-x64-musl": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.1.5.tgz",
+      "integrity": "sha512-Me+PfPI2TMeOQk0gYWfLQZtTktrmzbr8cDboqX83XKc7UrgAi55gF+2dUkWdxd19n55Essp2yeca+O9N5rBxHg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-openharmony-arm64": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.1.5.tgz",
+      "integrity": "sha512-yc5WrLzXks6zCQfn9Oxr8pORKyl/pF+QjHmW/Qx3qu0oyrrNC+y2JLTU1E2rcWYAmzlnqngWXHQjy51VzW70Vw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "openharmony"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-wasm32-wasi": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-wasm32-wasi/-/binding-wasm32-wasi-1.1.5.tgz",
+      "integrity": "sha512-VbQGPX2b4r48TAMIM2cjgluIM1HYutm4pcTEJsle7iEP7sB1dFqtPLBVbdLAZCxy1txCcPxf4QFf4v8uvltPqA==",
+      "cpu": [
+        "wasm32"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@emnapi/core": "1.11.1",
+        "@emnapi/runtime": "1.11.1",
+        "@napi-rs/wasm-runtime": "^1.1.6"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-win32-arm64-msvc": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.1.5.tgz",
+      "integrity": "sha512-gHv82k63z4qpV5+Q1y/12KrK0ltWBukVDI8nZcbT7Tt/ZlOIVwppazneq0F93oDxTo3IgAMEDIoQh3E2n6mVsw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-win32-x64-msvc": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.1.5.tgz",
+      "integrity": "sha512-tTZuDBPw85tEN5PQi1pnEBzDy0Z49HtScLAbD5t6hyeU92A95pRWaSMw1GZZi/RwgSgUIl0xrSlXIT/9QzvYSA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/pluginutils": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.1.tgz",
+      "integrity": "sha512-2j9bGt5Jh8hj+vPtgzPtl72j0yRxHAyumoo6TNfAjsLB04UtpSvPbPcDcBMxz7n+9CYB0c1GxQFxYRg2jimqGw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.55.1",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.55.1.tgz",
@@ -1169,6 +1515,42 @@
         "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"
+    },
+    "node_modules/@tybys/wasm-util": {
+      "version": "0.10.3",
+      "resolved": "https://registry.npmjs.org/@tybys/wasm-util/-/wasm-util-0.10.3.tgz",
+      "integrity": "sha512-F3fo1MYrRJYL3zER0OUOmkutjr1Vp23m7OsSgp7nq4SP6OqX6C/56XFIPAl5bt3zaBRjmW7SGz3u/6LwFpYcOg==",
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "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",
+      "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"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.8.tgz",
@@ -1190,6 +1572,92 @@
         "vue": "^3.2.25"
       }
     },
+    "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",
+      "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/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",
+      "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",
+      "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",
+      "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/@vue/compiler-core": {
       "version": "3.5.26",
       "resolved": "https://registry.npmjs.org/@vue/compiler-core/-/compiler-core-3.5.26.tgz",
@@ -1324,6 +1792,16 @@
       "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==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/autoprefixer": {
       "version": "10.4.23",
       "resolved": "https://registry.npmjs.org/autoprefixer/-/autoprefixer-10.4.23.tgz",
@@ -1462,6 +1940,16 @@
       ],
       "license": "CC-BY-4.0"
     },
+    "node_modules/chai": {
+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-6.2.2.tgz",
+      "integrity": "sha512-NUPRluOfOiTKBKvWPtSD4PhFvWCqOi0BGStNWs57X9js7XGTprSmFoz5F0tWhR4WPjNeR9jXqdC7/UpSJTnlRg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/chart.js": {
       "version": "4.5.1",
       "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-4.5.1.tgz",
@@ -1522,6 +2010,13 @@
         "node": ">= 6"
       }
     },
+    "node_modules/convert-source-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/cssesc": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/cssesc/-/cssesc-3.0.0.tgz",
@@ -1541,6 +2036,16 @@
       "integrity": "sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==",
       "license": "MIT"
     },
+    "node_modules/detect-libc": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
+      "integrity": "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/didyoumean": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/didyoumean/-/didyoumean-1.2.2.tgz",
@@ -1574,6 +2079,13 @@
         "url": "https://github.com/fb55/entities?sponsor=1"
       }
     },
+    "node_modules/es-module-lexer": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/es-module-lexer/-/es-module-lexer-2.3.1.tgz",
+      "integrity": "sha512-shc1dbU90Yl/xq1QrC7QRtfcwURZuVRfPhZbDoldJ1cn1gzDvBaBWlv0eFolj5+0znnPJz5TXLxsN77X/12KTA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/esbuild": {
       "version": "0.21.5",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.21.5.tgz",
@@ -1629,6 +2141,16 @@
       "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
       "license": "MIT"
     },
+    "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",
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/fast-glob": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/fast-glob/-/fast-glob-3.3.3.tgz",
@@ -1819,6 +2341,279 @@
         "jiti": "bin/jiti.js"
       }
     },
+    "node_modules/lightningcss": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss/-/lightningcss-1.33.0.tgz",
+      "integrity": "sha512-WkUDrojuJs0xkgGf2udWxa3yGBRxPtxUkB79i6aCZLRgc7PM8fZe9TosfPDcvEpQZbuFASnHYmRLBLUbmLOIIA==",
+      "dev": true,
+      "license": "MPL-2.0",
+      "dependencies": {
+        "detect-libc": "^2.0.3"
+      },
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      },
+      "optionalDependencies": {
+        "lightningcss-android-arm64": "1.33.0",
+        "lightningcss-darwin-arm64": "1.33.0",
+        "lightningcss-darwin-x64": "1.33.0",
+        "lightningcss-freebsd-x64": "1.33.0",
+        "lightningcss-linux-arm-gnueabihf": "1.33.0",
+        "lightningcss-linux-arm64-gnu": "1.33.0",
+        "lightningcss-linux-arm64-musl": "1.33.0",
+        "lightningcss-linux-x64-gnu": "1.33.0",
+        "lightningcss-linux-x64-musl": "1.33.0",
+        "lightningcss-win32-arm64-msvc": "1.33.0",
+        "lightningcss-win32-x64-msvc": "1.33.0"
+      }
+    },
+    "node_modules/lightningcss-android-arm64": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-android-arm64/-/lightningcss-android-arm64-1.33.0.tgz",
+      "integrity": "sha512-gEpRTalKdosp4Bb8qWtc2iOgE5SeIHlpS1up9bFq2wAyYhl1UdTObYiHe98zEM9SQvSoqQZ1IQD0JNpg3Ml5pg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-darwin-arm64": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-darwin-arm64/-/lightningcss-darwin-arm64-1.33.0.tgz",
+      "integrity": "sha512-Sciaz8eenNTKn9b3t7+xr0ipTp9YxKQY4npwQ3mrRuL0BAVHBLyZxofhaKBAVtzmtRZ/zTyo0/to4B1uWG/Djg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-darwin-x64": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-darwin-x64/-/lightningcss-darwin-x64-1.33.0.tgz",
+      "integrity": "sha512-Z5UPAxzrjlWNNyGy6i65cJzzvgJ5D3T6wMvs+gWpY9d7qRhANrxqAp6LhxIgZhWEw18RfJTGcRxjuLIBr+m8XQ==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-freebsd-x64": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-freebsd-x64/-/lightningcss-freebsd-x64-1.33.0.tgz",
+      "integrity": "sha512-QQM/Ti/hQajJwCY+RiWuCZ9sdtI/XQk7nDK5vC8kkdwixezOlDgvDx7+RT+QjK6FcFT4MpsuoBnHIo/O3StRRg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-linux-arm-gnueabihf": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-linux-arm-gnueabihf/-/lightningcss-linux-arm-gnueabihf-1.33.0.tgz",
+      "integrity": "sha512-N7FVBe6iS24MlM6R/4RBTxGhQheZGs7tiQ9U32UtF75NzP5Q7xWPRqLBCKxlRQRk3rY1jCIPLzx7WzOhuUIRLQ==",
+      "cpu": [
+        "arm"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-linux-arm64-gnu": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-linux-arm64-gnu/-/lightningcss-linux-arm64-gnu-1.33.0.tgz",
+      "integrity": "sha512-j2v/itmy4HlNxlc6voKXYgBqNi0Ng2LShg4z7GufpEgs05P+2suBVyi9I6YHq5uoVFx9ETin3eCEhLVyXGQnKg==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-linux-arm64-musl": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-linux-arm64-musl/-/lightningcss-linux-arm64-musl-1.33.0.tgz",
+      "integrity": "sha512-yiO5ROMuYQgXbC60yjZU5CYSFZGKXL0HFATXt9mHJn1+zW55oCtMI9NfcVhYLMFDL7gV7oBPon/EmMMGg2OvtQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-linux-x64-gnu": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-linux-x64-gnu/-/lightningcss-linux-x64-gnu-1.33.0.tgz",
+      "integrity": "sha512-ar+Ju7LmcN0Jo4FpL4hpFybwNG9/3A/Br5KW2n2jyODg3MEZXaDYADdemoNS+BDNfMgKvylJLj4S5tyRActuAg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "libc": [
+        "glibc"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-linux-x64-musl": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-linux-x64-musl/-/lightningcss-linux-x64-musl-1.33.0.tgz",
+      "integrity": "sha512-RYiYbkokw0trfKqqzfF55lginwEPrD3OJDfTuJzFs1MK6iFnDenaz1fqLLtX4ITG3OktJQXOeTaw1awrBAlZPw==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-win32-arm64-msvc": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-win32-arm64-msvc/-/lightningcss-win32-arm64-msvc-1.33.0.tgz",
+      "integrity": "sha512-1K+MPfLSFVpphzpdbfkhlWk6wBrTObBzS2T6db10PNOZgR9GoVsAWzwNyuhUYYbTp23j+4RrncfujZ4uAzXvwA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
+    "node_modules/lightningcss-win32-x64-msvc": {
+      "version": "1.33.0",
+      "resolved": "https://registry.npmjs.org/lightningcss-win32-x64-msvc/-/lightningcss-win32-x64-msvc-1.33.0.tgz",
+      "integrity": "sha512-OlEICDx/Xl0FqSp4bry8zFnCvGpig3Gl4gCquvYwHuqJKEC1+n9NgDniFvqHGmMv1ZkqDJrDqKKSykTDX+ehuA==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 12.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/parcel"
+      }
+    },
     "node_modules/lilconfig": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-3.1.3.tgz",
@@ -1885,9 +2680,9 @@
       }
     },
     "node_modules/nanoid": {
-      "version": "3.3.11",
-      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.11.tgz",
-      "integrity": "sha512-N8SpfPUnUp1bK+PMYW8qSWdl9U+wwNWI4QKxOYDy9JAro3WMX7p2OeVRF9v+347pnakNevPmiHhNmZ2HbFA76w==",
+      "version": "3.3.16",
+      "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.16.tgz",
+      "integrity": "sha512-bzlKTyNJ7+LdGIIwy8ijFpIqEQIvafahV7eYykJ8Cvh42EdJeODoJ6gUJXpQJvej1BddH8OqTXZNE/KfbWAu8Q==",
       "funding": [
         {
           "type": "github",
@@ -1939,6 +2734,20 @@
         "node": ">= 6"
       }
     },
+    "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/path-parse": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.7.tgz",
@@ -1946,6 +2755,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/pathe": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/pathe/-/pathe-2.0.3.tgz",
+      "integrity": "sha512-WUjGcAqP1gQacoQe+OBJsFA7Ld4DyXuUIjZ5cc75cLHvJ7dtNsTugphxIADwspS+AraAUePCKrSVtPLFj/F88w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/pdfjs-dist": {
       "version": "6.0.227",
       "resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-6.0.227.tgz",
@@ -1998,9 +2814,9 @@
       }
     },
     "node_modules/postcss": {
-      "version": "8.5.6",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.6.tgz",
-      "integrity": "sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==",
+      "version": "8.5.23",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.23.tgz",
+      "integrity": "sha512-g50586zr4bZmwFiTlflMu8E0bDTb5I5gertgwAKmsdUlTQIhZtunzUlD1WSzwcVWPoAVpsrA6vlfCD7oXvRwgg==",
       "funding": [
         {
           "type": "opencollective",
@@ -2017,7 +2833,7 @@
       ],
       "license": "MIT",
       "dependencies": {
-        "nanoid": "^3.3.11",
+        "nanoid": "^3.3.16",
         "picocolors": "^1.1.1",
         "source-map-js": "^1.2.1"
       },
@@ -2235,6 +3051,40 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/rolldown": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/rolldown/-/rolldown-1.1.5.tgz",
+      "integrity": "sha512-t9z29cJjXf/vxQ8dyhCSpt6H6aSwHTk8cT5I3iy6SMXuFpk5mB6PL6XfC8PCwrPTx93udwKUm9HRteAlTGBLiA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@oxc-project/types": "=0.139.0",
+        "@rolldown/pluginutils": "^1.0.0"
+      },
+      "bin": {
+        "rolldown": "bin/cli.mjs"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "optionalDependencies": {
+        "@rolldown/binding-android-arm64": "1.1.5",
+        "@rolldown/binding-darwin-arm64": "1.1.5",
+        "@rolldown/binding-darwin-x64": "1.1.5",
+        "@rolldown/binding-freebsd-x64": "1.1.5",
+        "@rolldown/binding-linux-arm-gnueabihf": "1.1.5",
+        "@rolldown/binding-linux-arm64-gnu": "1.1.5",
+        "@rolldown/binding-linux-arm64-musl": "1.1.5",
+        "@rolldown/binding-linux-ppc64-gnu": "1.1.5",
+        "@rolldown/binding-linux-s390x-gnu": "1.1.5",
+        "@rolldown/binding-linux-x64-gnu": "1.1.5",
+        "@rolldown/binding-linux-x64-musl": "1.1.5",
+        "@rolldown/binding-openharmony-arm64": "1.1.5",
+        "@rolldown/binding-wasm32-wasi": "1.1.5",
+        "@rolldown/binding-win32-arm64-msvc": "1.1.5",
+        "@rolldown/binding-win32-x64-msvc": "1.1.5"
+      }
+    },
     "node_modules/rollup": {
       "version": "4.55.1",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.55.1.tgz",
@@ -2304,6 +3154,13 @@
         "queue-microtask": "^1.2.2"
       }
     },
+    "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"
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
@@ -2313,6 +3170,20 @@
         "node": ">=0.10.0"
       }
     },
+    "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"
+    },
+    "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/sucrase": {
       "version": "3.35.1",
       "resolved": "https://registry.npmjs.org/sucrase/-/sucrase-3.35.1.tgz",
@@ -2410,15 +3281,32 @@
         "node": ">=0.8"
       }
     },
+    "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"
+    },
+    "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",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/tinyglobby": {
-      "version": "0.2.15",
-      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
-      "integrity": "sha512-j2Zq4NyQYG5XMST4cbs02Ak8iJUdxRM0XI5QyxXuZOzKOINmWurp3smXu3y5wDcJrptwpSjgXHzIQxR0omXljQ==",
+      "version": "0.2.17",
+      "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",
+      "integrity": "sha512-wXR/dYpcqKmfWpEdZjiKJOwCNFndD0DMnrW/cYjVGttEkBfVgcLFHoNrlj47mjOVic9yyNu65alsgF4NQyTa2g==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "fdir": "^6.5.0",
-        "picomatch": "^4.0.3"
+        "picomatch": "^4.0.4"
       },
       "engines": {
         "node": ">=12.0.0"
@@ -2446,9 +3334,9 @@
       }
     },
     "node_modules/tinyglobby/node_modules/picomatch": {
-      "version": "4.0.3",
-      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
-      "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.5.tgz",
+      "integrity": "sha512-RvwwcruNjI1ncT5xRakeyS9Lf8lcItv34KD+aif+VH9kduAyfYBipGh12274xtenIPZ119/R9BdTBa8gAwSh0A==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -2458,6 +3346,16 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "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/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -2478,6 +3376,14 @@
       "dev": true,
       "license": "Apache-2.0"
     },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "dev": true,
+      "license": "0BSD",
+      "optional": true
+    },
     "node_modules/update-browserslist-db": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.2.3.tgz",
@@ -2576,6 +3482,224 @@
         }
       }
     },
+    "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",
+      "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/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",
+      "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/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"
+      }
+    },
+    "node_modules/vitest/node_modules/picomatch": {
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.5.tgz",
+      "integrity": "sha512-RvwwcruNjI1ncT5xRakeyS9Lf8lcItv34KD+aif+VH9kduAyfYBipGh12274xtenIPZ119/R9BdTBa8gAwSh0A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
+    "node_modules/vitest/node_modules/vite": {
+      "version": "8.1.5",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.1.5.tgz",
+      "integrity": "sha512-7ULLwsCdYx/nRyrpiEwvqb5TFHrMVZyBt+rg/OAXT7rgj/z+DtTDyKFeLAdDkubDVDKD8jOsndmy7m55XcfUsw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lightningcss": "^1.32.0",
+        "picomatch": "^4.0.5",
+        "postcss": "^8.5.17",
+        "rolldown": "~1.1.5",
+        "tinyglobby": "^0.2.17"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "@vitejs/devtools": "^0.3.0",
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "@vitejs/devtools": {
+          "optional": true
+        },
+        "esbuild": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/vue": {
       "version": "3.5.26",
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.26.tgz",
@@ -2621,6 +3745,23 @@
       "peerDependencies": {
         "vue": "^3.5.0"
       }
+    },
+    "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",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
     }
   }
 }
diff --git a/frontend/package.json b/frontend/package.json
index 1e6ac6c..74835d3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -6,7 +6,8 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest run"
   },
   "dependencies": {
     "chart.js": "^4.4.1",
@@ -20,6 +21,7 @@
     "autoprefixer": "^10.4.18",
     "postcss": "^8.4.35",
     "tailwindcss": "^3.4.1",
-    "vite": "^5.1.6"
+    "vite": "^5.1.6",
+    "vitest": "^4.1.10"
   }
 }
diff --git a/frontend/src/components/ExtractionDiffDetails.vue b/frontend/src/components/ExtractionDiffDetails.vue
index e319a13..7ace8e4 100644
--- a/frontend/src/components/ExtractionDiffDetails.vue
+++ b/frontend/src/components/ExtractionDiffDetails.vue
@@ -4,11 +4,30 @@
     <div v-if="diff.metadata.length">
       <div class="font-semibold text-amber-300 mb-1">Métadonnées</div>
       <div class="space-y-0.5">
-        <div v-for="(c, i) in diff.metadata" :key="'m' + i" class="flex items-baseline gap-2">
-          <span class="text-gray-500 w-40 flex-shrink-0">{{ c.label }}</span>
-          <span class="text-red-400 line-through">{{ c.before }}</span>
-          <span class="text-gray-500">→</span>
-          <span class="text-green-400 font-medium">{{ c.after }}</span>
+        <div v-for="c in diff.metadata" :key="c.id" class="flex items-baseline gap-2">
+          <component :is="selectable ? 'label' : 'span'" class="flex items-baseline gap-2 flex-1 min-w-0" :class="selectable && 'cursor-pointer'">
+            <input
+              v-if="selectable"
+              type="checkbox"
+              :checked="accepted(c.id)"
+              @change="toggle(c.id, $event.target.checked)"
+              class="w-3.5 h-3.5 rounded flex-shrink-0 self-center"
+            />
+            <span class="text-gray-500 w-40 flex-shrink-0">{{ c.label }}</span>
+            <span class="text-red-400" :class="accepted(c.id) && 'line-through'">{{ c.before }}</span>
+            <span class="text-gray-500">→</span>
+            <span v-if="!selectable || !c.editable" class="text-green-400 font-medium" :class="!accepted(c.id) && 'line-through opacity-50'">
+              {{ c.after }}
+            </span>
+          </component>
+          <input
+            v-if="selectable && c.editable"
+            type="text"
+            :value="displayValue(c)"
+            :disabled="!accepted(c.id)"
+            @input="edit(c, $event.target.value)"
+            class="flex-1 min-w-0 px-1.5 py-0.5 rounded border border-gray-600 bg-gray-900 text-green-400 font-medium disabled:opacity-40 disabled:line-through focus:ring-1 focus:ring-amber-500 focus:border-amber-500 focus:outline-none"
+          />
         </div>
       </div>
     </div>
@@ -17,18 +36,74 @@
     <div v-if="diff.locataires.length">
       <div class="font-semibold text-amber-300 mb-1">Locataires</div>
       <div class="space-y-1.5">
-        <div v-for="(loc, i) in diff.locataires" :key="'l' + i" class="bg-gray-900/70 border border-gray-700 rounded p-1.5">
+        <div v-for="(loc, i) in diff.locataires" :key="loc.id || 'l' + i" class="bg-gray-900/70 border border-gray-700 rounded p-1.5">
           <div class="flex items-center gap-2 mb-0.5">
+            <input
+              v-if="selectable && loc.kind !== 'modified'"
+              type="checkbox"
+              :checked="accepted(loc.id)"
+              @change="toggle(loc.id, $event.target.checked)"
+              class="w-3.5 h-3.5 rounded flex-shrink-0"
+            />
             <span :class="kindClass(loc.kind)" class="text-[10px] uppercase font-semibold px-1 rounded">
               {{ kindLabel(loc.kind) }}
             </span>
             <span class="font-medium text-gray-200">{{ loc.title }}</span>
           </div>
-          <div v-for="(f, j) in loc.fields" :key="j" class="flex items-baseline gap-2 pl-2">
-            <span class="text-gray-500 w-24 flex-shrink-0">{{ f.label }}</span>
-            <span class="text-red-400 line-through break-all">{{ f.before }}</span>
-            <span class="text-gray-500">→</span>
-            <span class="text-green-400 font-medium break-all">{{ f.after }}</span>
+
+          <div v-for="c in loc.changes" :key="c.id">
+            <!-- Champ identitaire : cochable et modifiable individuellement -->
+            <div v-if="c.kind === 'champ'" class="flex items-baseline gap-2 pl-2">
+              <component :is="selectable && !c.forced ? 'label' : 'span'" class="flex items-baseline gap-2 flex-1 min-w-0" :class="selectable && !c.forced && 'cursor-pointer'">
+                <input
+                  v-if="selectable"
+                  type="checkbox"
+                  :checked="accepted(c.id)"
+                  :disabled="c.forced"
+                  :title="c.hint"
+                  @change="toggle(c.id, $event.target.checked)"
+                  class="w-3.5 h-3.5 rounded flex-shrink-0 self-center disabled:opacity-50"
+                />
+                <span class="text-gray-500 w-24 flex-shrink-0">{{ c.label }}</span>
+                <span class="text-red-400 break-all" :class="accepted(c.id) && 'line-through'">{{ c.before }}</span>
+                <span class="text-gray-500">→</span>
+                <span v-if="!selectable || !c.editable" class="text-green-400 font-medium break-all" :class="!accepted(c.id) && 'line-through opacity-50'">
+                  {{ c.after }}
+                </span>
+              </component>
+              <input
+                v-if="selectable && c.editable"
+                type="text"
+                :value="displayValue(c)"
+                :disabled="!accepted(c.id)"
+                @input="edit(c, $event.target.value)"
+                class="flex-1 min-w-0 px-1.5 py-0.5 rounded border border-gray-600 bg-gray-900 text-green-400 font-medium disabled:opacity-40 disabled:line-through focus:ring-1 focus:ring-amber-500 focus:border-amber-500 focus:outline-none"
+              />
+              <span v-if="selectable && c.forced" class="text-gray-400 italic flex-shrink-0">{{ c.hint }}</span>
+            </div>
+
+            <!-- Montants et lignes : un seul bloc, pour que les sommes restent justes -->
+            <div v-else class="pl-2">
+              <component :is="selectable ? 'label' : 'div'" class="flex items-center gap-2" :class="selectable && 'cursor-pointer'">
+                <input
+                  v-if="selectable"
+                  type="checkbox"
+                  :checked="accepted(c.id)"
+                  @change="toggle(c.id, $event.target.checked)"
+                  class="w-3.5 h-3.5 rounded flex-shrink-0"
+                />
+                <span class="text-gray-300 font-medium">{{ c.label }}</span>
+                <span class="text-gray-400">({{ c.fields.length }} changement{{ c.fields.length > 1 ? 's' : '' }})</span>
+              </component>
+              <div :class="['pl-5 space-y-0.5', selectable && !accepted(c.id) && 'opacity-40']">
+                <div v-for="(f, j) in c.fields" :key="j" class="flex items-baseline gap-2">
+                  <span class="text-gray-500 w-24 flex-shrink-0">{{ f.label }}</span>
+                  <span class="text-red-400 break-all" :class="accepted(c.id) && 'line-through'">{{ f.before }}</span>
+                  <span class="text-gray-500">→</span>
+                  <span class="text-green-400 font-medium break-all" :class="!accepted(c.id) && 'line-through'">{{ f.after }}</span>
+                </div>
+              </div>
+            </div>
           </div>
         </div>
       </div>
@@ -38,16 +113,23 @@
     <div v-if="diff.operations.length">
       <div class="font-semibold text-amber-300 mb-1">Opérations</div>
       <div class="space-y-1.5">
-        <div v-for="(op, i) in diff.operations" :key="'o' + i" class="bg-gray-900/70 border border-gray-700 rounded p-1.5">
-          <div class="flex items-center gap-2 mb-0.5">
+        <div v-for="(op, i) in diff.operations" :key="op.id || 'o' + i" class="bg-gray-900/70 border border-gray-700 rounded p-1.5">
+          <component :is="selectable ? 'label' : 'div'" class="flex items-center gap-2 mb-0.5" :class="selectable && 'cursor-pointer'">
+            <input
+              v-if="selectable"
+              type="checkbox"
+              :checked="accepted(op.id)"
+              @change="toggle(op.id, $event.target.checked)"
+              class="w-3.5 h-3.5 rounded flex-shrink-0"
+            />
             <span :class="kindClass(op.kind)" class="text-[10px] uppercase font-semibold px-1 rounded">
               {{ kindLabel(op.kind) }}
             </span>
             <span v-if="op.index >= 0" class="text-gray-500">opération #{{ op.index + 1 }}</span>
-          </div>
-          <div class="pl-2">
-            <div class="text-red-400 line-through break-all">{{ op.before }}</div>
-            <div class="text-green-400 font-medium break-all">{{ op.after }}</div>
+          </component>
+          <div :class="['pl-2', selectable && !accepted(op.id) && 'opacity-40']">
+            <div class="text-red-400 break-all" :class="accepted(op.id) && 'line-through'">{{ op.before }}</div>
+            <div class="text-green-400 font-medium break-all" :class="!accepted(op.id) && 'line-through'">{{ op.after }}</div>
           </div>
         </div>
       </div>
@@ -56,13 +138,58 @@
 </template>
 
 <script setup>
-defineProps({
+import { computed } from 'vue'
+
+const props = defineProps({
   diff: {
     type: Object,
     required: true,
   },
+  // Absente : affichage seul. Fournie : chaque changement devient cochable, et
+  // les champs textuels retenus deviennent modifiables.
+  selection: {
+    type: Object,
+    default: null,
+  },
 })
 
+const emit = defineEmits(['update:selection'])
+
+const selectable = computed(() => props.selection !== null)
+
+function accepted(id) {
+  if (!selectable.value) return true
+  const state = props.selection[id]
+  return state ? state.accepted !== false : true
+}
+
+function stateOf(id) {
+  return props.selection[id] || { accepted: true }
+}
+
+function toggle(id, value) {
+  emit('update:selection', { ...props.selection, [id]: { ...stateOf(id), accepted: value } })
+}
+
+// Valeur affichée dans le champ de saisie : celle déjà retenue, sinon celle
+// proposée par la nouvelle extraction.
+function displayValue(change) {
+  const state = props.selection?.[change.id]
+  const value = state && state.value !== undefined ? state.value : change.afterValue
+  return value == null ? '' : String(value)
+}
+
+function edit(change, raw) {
+  // Un champ numérique en base doit le rester (montant du solde, par exemple).
+  const value = typeof change.afterValue === 'number' && raw.trim() !== '' && !Number.isNaN(Number(raw))
+    ? Number(raw)
+    : raw
+  emit('update:selection', {
+    ...props.selection,
+    [change.id]: { ...stateOf(change.id), accepted: true, value },
+  })
+}
+
 function kindLabel(kind) {
   if (kind === 'added') return 'ajouté'
   if (kind === 'removed') return 'supprimé'
diff --git a/frontend/src/pages/ReExtractionPage.vue b/frontend/src/pages/ReExtractionPage.vue
index 8d54453..381369a 100644
--- a/frontend/src/pages/ReExtractionPage.vue
+++ b/frontend/src/pages/ReExtractionPage.vue
@@ -111,8 +111,9 @@
               <input
                 type="checkbox"
                 v-model="item.selected"
-                :disabled="isApplying"
-                class="w-4 h-4 rounded flex-shrink-0"
+                :disabled="isApplying || item.counts.accepted === 0"
+                :title="item.counts.accepted === 0 ? 'Aucune modification retenue pour ce document' : ''"
+                class="w-4 h-4 rounded flex-shrink-0 disabled:opacity-40"
               />
 
               <div class="flex-1 min-w-0">
@@ -134,6 +135,13 @@
                 <span v-if="item.diff.summary.operations" class="px-2 py-0.5 text-xs rounded bg-amber-500/20 text-amber-300">
                   {{ item.diff.summary.operations }} opération{{ item.diff.summary.operations > 1 ? 's' : '' }}
                 </span>
+                <span
+                  v-if="item.counts.accepted < item.counts.total"
+                  class="px-2 py-0.5 text-xs rounded bg-orange-500/20 text-orange-300"
+                  title="Une partie des modifications a été écartée"
+                >
+                  {{ item.counts.accepted }}/{{ item.counts.total }} retenues
+                </span>
               </div>
 
               <!-- État des tags -->
@@ -168,9 +176,34 @@
               </div>
             </div>
 
-            <!-- Détail : différences + tags à confirmer -->
+            <!-- Détail : différences (cochables) + tags à confirmer -->
             <div v-if="openDetails[item.id]" class="bg-amber-50 border-t border-amber-300 px-4 py-3 space-y-4">
-              <ExtractionDiffDetails :diff="item.diff" />
+              <div class="flex items-center justify-between text-xs">
+                <span class="text-amber-800">
+                  {{ item.counts.accepted }} modification{{ item.counts.accepted > 1 ? 's' : '' }}
+                  retenue{{ item.counts.accepted > 1 ? 's' : '' }} sur {{ item.counts.total }}
+                </span>
+                <div class="flex items-center gap-2">
+                  <button
+                    @click="setAllChanges(item, true)"
+                    class="px-2 py-1 rounded text-amber-700 hover:bg-amber-100 transition-colors"
+                  >
+                    Tout retenir
+                  </button>
+                  <button
+                    @click="setAllChanges(item, false)"
+                    class="px-2 py-1 rounded text-amber-700 hover:bg-amber-100 transition-colors"
+                  >
+                    Tout écarter
+                  </button>
+                </div>
+              </div>
+
+              <ExtractionDiffDetails
+                :diff="item.diff"
+                :selection="item.selection"
+                @update:selection="updateSelection(item, $event)"
+              />
 
               <div v-if="item.tagsToReview.length">
                 <div class="font-semibold text-amber-800 text-xs mb-2">
@@ -268,7 +301,8 @@
             {{ applyError }}
           </template>
           <template v-else>
-            Les documents sélectionnés seront réenregistrés avec la nouvelle extraction.
+            Seules les modifications retenues seront enregistrées ({{ acceptedInSelection }} sur
+            {{ totalInSelection }} pour la sélection).
           </template>
         </div>
         <button
@@ -287,7 +321,8 @@
 import { computed, onMounted, onBeforeUnmount, reactive, ref } from 'vue'
 import ExtractionDiffDetails from '../components/ExtractionDiffDetails.vue'
 import TagAutocomplete from '../components/TagAutocomplete.vue'
-import { computeExtractionDiff } from '../utils/diffExtraction.js'
+import { computeExtractionDiff, listChangeIds } from '../utils/diffExtraction.js'
+import { countAccepted, mergeExtraction } from '../utils/mergeExtraction.js'
 import { fillPredictions, remapTags, toDepensesTags } from '../utils/tagRemap.js'
 
 // Ordre de grandeur mesuré d'une extraction, avant toute mesure réelle.
@@ -321,6 +356,12 @@ const problemItems = computed(() =>
   items.value.filter((i) => ['sans_pdf', 'erreur'].includes(i.status))
 )
 const selectedItems = computed(() => changedItems.value.filter((i) => i.selected))
+const acceptedInSelection = computed(() =>
+  selectedItems.value.reduce((sum, i) => sum + i.counts.accepted, 0)
+)
+const totalInSelection = computed(() =>
+  selectedItems.value.reduce((sum, i) => sum + i.counts.total, 0)
+)
 const allSelected = computed(
   () => changedItems.value.length > 0 && selectedItems.value.length === changedItems.value.length
 )
@@ -386,7 +427,13 @@ function resetItems() {
     has_pdf: doc.has_pdf,
     status: 'attente',
     diff: null,
+    previousData: null,
+    previousTags: [],
     newData: null,
+    // État des cases du détail, par identifiant de changement.
+    selection: {},
+    changeIds: [],
+    counts: { accepted: 0, total: 0 },
     tags: {},
     tagStats: { reported: 0, predicted: 0, untagged: 0 },
     tagsToReview: [],
@@ -431,6 +478,7 @@ async function scanOne(item) {
     if (!response.ok) throw new Error(result.detail || 'Échec de la ré-extraction')
 
     const diff = computeExtractionDiff(result.previous_data, result.re_extracted_data)
+    item.previousData = result.previous_data
     item.newData = result.re_extracted_data
     item.diff = diff
 
@@ -439,6 +487,12 @@ async function scanOne(item) {
       return
     }
 
+    // Toutes les modifications sont retenues par défaut : le cas courant reste
+    // à un clic, décocher relève de l'exception.
+    item.changeIds = listChangeIds(diff)
+    item.selection = {}
+    item.counts = countAccepted(item.changeIds, {})
+
     await prepareTags(item, result)
     item.status = 'modifie'
     item.selected = true
@@ -461,6 +515,7 @@ async function prepareTags(item, result) {
 
   const predicted = await fillPredictions(tags, newOps, missing)
 
+  item.previousTags = result.depenses_tags || []
   item.tags = tags
   item.tagStats = {
     reported,
@@ -471,6 +526,31 @@ async function prepareTags(item, result) {
   item.tagsToReview = missing
 }
 
+// Les tags ont été choisis sur la liste d'opérations ré-extraite ; écarter un
+// ajout ou refuser une suppression change cette liste. On les reporte donc une
+// dernière fois, par signature, sur les opérations effectivement enregistrées.
+function finalTags(item, mergedData) {
+  const newOps = item.newData.recapitulatif_operations || []
+  const previousOps = item.previousData?.recapitulatif_operations || []
+  const finalOps = mergedData.recapitulatif_operations || []
+
+  const chosen = Object.entries(item.tags).map(([index, t]) => ({
+    index: Number(index),
+    tag_id: t.tag_id,
+    tag_nom: t.tag_nom,
+  }))
+  const { tags, missing } = remapTags(newOps, chosen, finalOps)
+
+  // Une opération dont on a refusé la suppression revient de l'ancienne
+  // extraction : son tag aussi, il n'est pas dans les choix ci-dessus.
+  if (missing.length) {
+    const { tags: restored } = remapTags(previousOps, item.previousTags, finalOps)
+    for (const i of missing) if (restored[i]) tags[i] = restored[i]
+  }
+
+  return toDepensesTags(tags)
+}
+
 function setTag(item, opIndex, tagId) {
   if (tagId == null) {
     delete item.tags[opIndex]
@@ -494,6 +574,22 @@ function refreshTagStats(item) {
   }
 }
 
+function updateSelection(item, selection) {
+  item.selection = selection
+  item.counts = countAccepted(item.changeIds, selection)
+  // Plus rien à retenir : réenregistrer le document n'aurait aucun effet.
+  if (item.counts.accepted === 0) item.selected = false
+}
+
+function setAllChanges(item, accepted) {
+  const selection = {}
+  for (const id of item.changeIds) {
+    // Une valeur saisie à la main est conservée si le changement reste retenu.
+    selection[id] = { ...(item.selection[id] || {}), accepted }
+  }
+  updateSelection(item, selection)
+}
+
 function stopScan() {
   abortScan = true
   controller?.abort()
@@ -527,13 +623,14 @@ async function applySelection() {
   let failures = 0
   for (const item of targets) {
     try {
+      const data = mergeExtraction(item.previousData, item.newData, item.diff, item.selection)
       const response = await fetch(`/api/documents/${item.id}`, {
         method: 'PUT',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
           source_file: item.source_file,
-          data: item.newData,
-          depenses_tags: toDepensesTags(item.tags),
+          data,
+          depenses_tags: finalTags(item, data),
         }),
       })
       const result = await response.json()
diff --git a/frontend/src/utils/diffExtraction.js b/frontend/src/utils/diffExtraction.js
index baab06b..a4348fc 100644
--- a/frontend/src/utils/diffExtraction.js
+++ b/frontend/src/utils/diffExtraction.js
@@ -1,8 +1,17 @@
 // Comparaison de deux jeux de données d'extraction (avant / après re-extraction).
 //
 // Chaque jeu a la forme { metadata, situation_locataires, recapitulatif_operations }.
-// Retourne un résumé structuré des différences, destiné à la fois à l'affichage
-// (panneau de diff) et à la mise en évidence inline (anneaux « modifié »).
+// Retourne un résumé structuré des différences, destiné à trois usages :
+//   - l'affichage (panneau de diff) via `label` / `before` / `after`, déjà formatés ;
+//   - la mise en évidence inline (anneaux « modifié ») via les listes `changed*` ;
+//   - l'application sélective (cf. mergeExtraction.js) via `id`, `path` et les
+//     valeurs brutes `beforeValue` / `afterValue`.
+//
+// Maille des changements sélectionnables : un champ pour ce qui est textuel
+// (nom, numéro de lot, métadonnées), un bloc pour les montants et lignes d'un
+// locataire — les retenir séparément produirait des totaux qui ne somment plus.
+
+import { sameLot } from './lots.js'
 
 const EPS = 0.005
 
@@ -49,6 +58,27 @@ const METADATA_FIELDS = [
   ['solde.date_arrete', 'Solde · date arrêté'],
 ]
 
+// Champs identitaires d'un locataire : du texte, sans lien arithmétique avec le
+// reste. Chacun se retient ou se refuse indépendamment.
+const LOCATAIRE_IDENTITE = [
+  ['locataire.nom', 'Nom'],
+  ['lot.numero', 'Lot'],
+  ['lot.type', 'Type'],
+]
+
+// Champs chiffrés d'un locataire : liés entre eux (total = somme des postes,
+// impayés = total − réglés), donc regroupés en un seul changement.
+const LOCATAIRE_MONTANTS = [
+  ['totaux.loyers', 'Total loyers'],
+  ['totaux.taxes', 'Total taxes'],
+  ['totaux.provisions', 'Total provisions'],
+  ['totaux.divers', 'Total divers'],
+  ['totaux.solde_anterieur', 'Solde antérieur'],
+  ['totaux.total', 'Total'],
+  ['totaux.regles', 'Réglés'],
+  ['totaux.impayes', 'Impayés'],
+]
+
 function ligneSig(l) {
   if (!l) return '∅'
   const p = l.periode || {}
@@ -77,30 +107,55 @@ function diffLignes(before, after) {
   return changes
 }
 
-function diffLocataire(before, after) {
-  const fields = []
-  const scalar = [
-    ['locataire.nom', 'Nom'],
-    ['lot.numero', 'Lot'],
-    ['lot.type', 'Type'],
-    ['totaux.loyers', 'Total loyers'],
-    ['totaux.taxes', 'Total taxes'],
-    ['totaux.provisions', 'Total provisions'],
-    ['totaux.divers', 'Total divers'],
-    ['totaux.solde_anterieur', 'Solde antérieur'],
-    ['totaux.total', 'Total'],
-    ['totaux.regles', 'Réglés'],
-    ['totaux.impayes', 'Impayés'],
-  ]
-  for (const [path, label] of scalar) {
+// Changements d'un locataire modifié : un par champ identitaire, plus un bloc
+// unique pour l'ensemble des montants et des lignes.
+function diffLocataire(index, before, after) {
+  const changes = []
+
+  for (const [path, label] of LOCATAIRE_IDENTITE) {
     const bv = get(before, path)
     const av = get(after, path)
     if (!valEq(bv, av)) {
-      fields.push({ label, before: fmtValue(bv), after: fmtValue(av) })
+      // Une réécriture de forme du numéro de lot ("0001" → "01") est imposée par
+      // le backend, qui normalise tout enregistrement : inutile de proposer de
+      // la refuser, la valeur reviendrait normalisée.
+      const forced = path === 'lot.numero' && sameLot(bv, av)
+      changes.push({
+        id: `loc:${index}:${path}`,
+        kind: 'champ',
+        path,
+        label,
+        before: fmtValue(bv),
+        after: fmtValue(av),
+        beforeValue: bv,
+        afterValue: av,
+        editable: !forced,
+        forced,
+        hint: forced ? 'Numéro normalisé automatiquement à l’enregistrement' : undefined,
+      })
     }
   }
-  fields.push(...diffLignes(before?.lignes, after?.lignes))
-  return fields
+
+  const montants = []
+  for (const [path, label] of LOCATAIRE_MONTANTS) {
+    const bv = get(before, path)
+    const av = get(after, path)
+    if (!valEq(bv, av)) {
+      montants.push({ label, before: fmtValue(bv), after: fmtValue(av) })
+    }
+  }
+  montants.push(...diffLignes(before?.lignes, after?.lignes))
+
+  if (montants.length) {
+    changes.push({
+      id: `loc:${index}:montants`,
+      kind: 'montants',
+      label: 'Montants et lignes',
+      fields: montants,
+    })
+  }
+
+  return changes
 }
 
 function locataireTitle(loc) {
@@ -134,7 +189,17 @@ export function computeExtractionDiff(before, after) {
     const bv = get(b.metadata, path)
     const av = get(a.metadata, path)
     if (!valEq(bv, av)) {
-      metadata.push({ label, before: fmtValue(bv), after: fmtValue(av) })
+      metadata.push({
+        id: `meta:${path}`,
+        kind: 'champ',
+        path,
+        label,
+        before: fmtValue(bv),
+        after: fmtValue(av),
+        beforeValue: bv,
+        afterValue: av,
+        editable: true,
+      })
       changedMetadataPaths.push(path)
     }
   }
@@ -149,14 +214,26 @@ export function computeExtractionDiff(before, after) {
     const ob = i < lb.length ? lb[i] : null
     const oa = i < la.length ? la[i] : null
     if (!ob && oa) {
-      locataires.push({ index: i, kind: 'added', title: locataireTitle(oa), fields: [] })
+      locataires.push({
+        id: `loc:${i}:entier`,
+        index: i,
+        kind: 'added',
+        title: locataireTitle(oa),
+        changes: [],
+      })
       changedLocataireIndices.push(i)
     } else if (ob && !oa) {
-      locataires.push({ index: i, kind: 'removed', title: locataireTitle(ob), fields: [] })
+      locataires.push({
+        id: `loc:${i}:entier`,
+        index: i,
+        kind: 'removed',
+        title: locataireTitle(ob),
+        changes: [],
+      })
     } else {
-      const fields = diffLocataire(ob, oa)
-      if (fields.length) {
-        locataires.push({ index: i, kind: 'modified', title: locataireTitle(oa), fields })
+      const changes = diffLocataire(i, ob, oa)
+      if (changes.length) {
+        locataires.push({ index: i, kind: 'modified', title: locataireTitle(oa), changes })
         changedLocataireIndices.push(i)
       }
     }
@@ -184,17 +261,32 @@ export function computeExtractionDiff(before, after) {
       oldCounts.set(s, remaining - 1) // appariée avec une ancienne identique
     } else {
       changedOperationIndices.push(i)
-      operations.push({ index: i, kind: 'added', before: '∅', after: fmtValue(s) })
+      operations.push({
+        id: `op:added:${i}`,
+        index: i,
+        oldIndex: -1,
+        kind: 'added',
+        before: '∅',
+        after: fmtValue(s),
+      })
     }
     newCounts.set(s, (newCounts.get(s) || 0) + 1)
   })
   // Anciennes opérations absentes de la nouvelle extraction -> supprimées.
+  // `oldIndex` permet de les réinsérer à leur place si la suppression est refusée.
   const seen = new Map()
-  ob.forEach((op) => {
+  ob.forEach((op, i) => {
     const s = opSig(op)
     seen.set(s, (seen.get(s) || 0) + 1)
     if ((newCounts.get(s) || 0) < seen.get(s)) {
-      operations.push({ index: -1, kind: 'removed', before: fmtValue(s), after: '∅' })
+      operations.push({
+        id: `op:removed:${i}`,
+        index: -1,
+        oldIndex: i,
+        kind: 'removed',
+        before: fmtValue(s),
+        after: '∅',
+      })
     }
   })
 
@@ -215,3 +307,17 @@ export function computeExtractionDiff(before, after) {
     summary,
   }
 }
+
+// Identifiants de tous les changements sélectionnables, dans l'ordre d'affichage.
+// Un locataire ajouté ou supprimé compte pour un ; un locataire modifié expose
+// une entrée par champ identitaire, plus une pour ses montants.
+export function listChangeIds(diff) {
+  const ids = []
+  for (const m of diff.metadata) ids.push(m.id)
+  for (const loc of diff.locataires) {
+    if (loc.kind === 'modified') ids.push(...loc.changes.map((c) => c.id))
+    else ids.push(loc.id)
+  }
+  for (const op of diff.operations) ids.push(op.id)
+  return ids
+}
diff --git a/frontend/src/utils/lots.js b/frontend/src/utils/lots.js
new file mode 100644
index 0000000..97b948d
--- /dev/null
+++ b/frontend/src/utils/lots.js
@@ -0,0 +1,21 @@
+// Miroir de la normalisation des numéros de lot appliquée par le backend
+// (src/plesna_gerance/utils/lots.py) : tout enregistrement y passe, quelle que
+// soit la valeur envoyée. Le front en a besoin pour ne pas proposer de refuser
+// un changement que le serveur réappliquera de toute façon.
+
+const LOT_NUMERO_WIDTH = 2
+const LOT_NUMERO_INCONNU = '00'
+
+export function normalizeLotNumero(value) {
+  if (value == null) return null
+  const digits = String(value).replace(/\D/g, '')
+  if (!digits) return null
+  const significant = digits.replace(/^0+/, '')
+  if (!significant) return LOT_NUMERO_INCONNU
+  return significant.padStart(LOT_NUMERO_WIDTH, '0')
+}
+
+// Vrai quand deux écritures désignent le même lot ("0001" et "01").
+export function sameLot(a, b) {
+  return normalizeLotNumero(a) === normalizeLotNumero(b)
+}
diff --git a/frontend/src/utils/mergeExtraction.js b/frontend/src/utils/mergeExtraction.js
new file mode 100644
index 0000000..8c7a8c0
--- /dev/null
+++ b/frontend/src/utils/mergeExtraction.js
@@ -0,0 +1,134 @@
+// Fusion sélective de deux extractions.
+//
+// Le balayage de ré-extraction n'impose pas de tout prendre ou tout laisser :
+// l'utilisateur retient les changements un par un. Le document enregistré est
+// donc construit ici, en partant des données actuelles et en n'y appliquant que
+// les changements retenus — éventuellement avec une valeur saisie à la main.
+//
+// `selection` associe l'identifiant d'un changement (cf. diffExtraction.js) à
+// { accepted, value } ; une entrée absente vaut « retenu », pour que le cas
+// courant (tout accepter) ne demande aucune initialisation.
+
+function clone(value) {
+  return value == null ? value : JSON.parse(JSON.stringify(value))
+}
+
+function isAccepted(selection, id) {
+  const state = selection?.[id]
+  return state ? state.accepted !== false : true
+}
+
+// Un changement imposé (normalisation appliquée par le backend) est appliqué
+// quoi qu'il arrive : le refuser produirait un écart entre ce qu'affiche
+// l'interface et ce qui finit en base.
+function isApplied(selection, change) {
+  return change.forced === true || isAccepted(selection, change.id)
+}
+
+// Valeur à écrire pour un changement retenu : celle saisie à la main si elle
+// existe, sinon celle proposée par la nouvelle extraction.
+function chosenValue(selection, change) {
+  const state = selection?.[change.id]
+  if (state && state.value !== undefined) return state.value
+  return change.afterValue
+}
+
+function setPath(obj, path, value) {
+  const keys = path.split('.')
+  let target = obj
+  for (const key of keys.slice(0, -1)) {
+    if (target[key] == null || typeof target[key] !== 'object') target[key] = {}
+    target = target[key]
+  }
+  target[keys.at(-1)] = value
+}
+
+/**
+ * Construit les données à enregistrer.
+ *
+ * @param {Object} previous  données actuellement en base
+ * @param {Object} next      données ré-extraites
+ * @param {Object} diff      sortie de computeExtractionDiff(previous, next)
+ * @param {Object} selection état des cases, par identifiant de changement
+ */
+export function mergeExtraction(previous, next, diff, selection = {}) {
+  const merged = clone(previous) || {}
+  const nextData = next || {}
+
+  // --- Métadonnées : un champ retenu écrase le champ correspondant.
+  if (!merged.metadata) merged.metadata = {}
+  for (const change of diff.metadata) {
+    if (isApplied(selection, change)) {
+      setPath(merged.metadata, change.path, chosenValue(selection, change))
+    }
+  }
+
+  // --- Locataires : alignés par index, comme dans le diff.
+  const previousLoc = previous?.situation_locataires || []
+  const nextLoc = nextData.situation_locataires || []
+  const byIndex = new Map(diff.locataires.map((loc) => [loc.index, loc]))
+  const locataires = []
+  for (let i = 0; i < Math.max(previousLoc.length, nextLoc.length); i++) {
+    const entry = byIndex.get(i)
+
+    // Locataire inchangé : l'ancienne et la nouvelle version sont équivalentes.
+    if (!entry) {
+      const kept = i < previousLoc.length ? previousLoc[i] : nextLoc[i]
+      if (kept) locataires.push(clone(kept))
+      continue
+    }
+
+    if (entry.kind === 'added') {
+      if (isAccepted(selection, entry.id)) locataires.push(clone(nextLoc[i]))
+      continue
+    }
+    if (entry.kind === 'removed') {
+      // Refuser la suppression, c'est conserver le locataire actuel.
+      if (!isAccepted(selection, entry.id)) locataires.push(clone(previousLoc[i]))
+      continue
+    }
+
+    const kept = clone(previousLoc[i])
+    for (const change of entry.changes) {
+      if (!isApplied(selection, change)) continue
+      if (change.kind === 'montants') {
+        // Les chiffres d'un locataire viennent en bloc du même parser.
+        kept.totaux = clone(nextLoc[i]?.totaux)
+        kept.lignes = clone(nextLoc[i]?.lignes)
+      } else {
+        setPath(kept, change.path, chosenValue(selection, change))
+      }
+    }
+    locataires.push(kept)
+  }
+  merged.situation_locataires = locataires
+
+  // --- Opérations : on part de la nouvelle liste, dont on retire les ajouts
+  // refusés, puis on y réinsère les suppressions refusées à leur place d'origine.
+  const previousOps = previous?.recapitulatif_operations || []
+  const refusedAdded = new Set(
+    diff.operations
+      .filter((op) => op.kind === 'added' && !isAccepted(selection, op.id))
+      .map((op) => op.index)
+  )
+  const operations = []
+  ;(nextData.recapitulatif_operations || []).forEach((op, i) => {
+    if (!refusedAdded.has(i)) operations.push(clone(op))
+  })
+  const restored = diff.operations
+    .filter((op) => op.kind === 'removed' && !isAccepted(selection, op.id))
+    .sort((x, y) => x.oldIndex - y.oldIndex)
+  for (const op of restored) {
+    operations.splice(Math.min(op.oldIndex, operations.length), 0, clone(previousOps[op.oldIndex]))
+  }
+  merged.recapitulatif_operations = operations
+
+  return merged
+}
+
+// Nombre de changements retenus sur le total, pour l'affichage.
+export function countAccepted(changeIds, selection = {}) {
+  let accepted = 0
+  for (const id of changeIds) if (isAccepted(selection, id)) accepted++
+  return { accepted, total: changeIds.length }
+}
diff --git a/frontend/tests/mergeExtraction.test.js b/frontend/tests/mergeExtraction.test.js
new file mode 100644
index 0000000..5eb3007
--- /dev/null
+++ b/frontend/tests/mergeExtraction.test.js
@@ -0,0 +1,223 @@
+// La fusion décide de ce qui est écrit en base : elle est testée pièce par pièce.
+import { describe, expect, it } from 'vitest'
+
+import { computeExtractionDiff, listChangeIds } from '../src/utils/diffExtraction.js'
+import { countAccepted, mergeExtraction } from '../src/utils/mergeExtraction.js'
+
+// Données en base, inspirées d'un compte rendu réel.
+const previous = {
+  metadata: {
+    document: { reference: '33680000', date: '2026-06-22' },
+    immeuble: { code: '33689020', adresse: '4 RUE SERVIENT' },
+    solde: { montant: 11214.51, type: 'crediteur' },
+  },
+  situation_locataires: [
+    {
+      lot: { numero: '0007', type: 'Appartement' },
+      locataire: { nom: 'LATAPY NINA' },
+      totaux: { total: 1200, regles: 1200, impayes: 0 },
+      lignes: [{ type: 'loyer', loyers: 500, total: 500 }],
+    },
+    {
+      lot: { numero: '0008', type: 'Appartement' },
+      locataire: { nom: 'BESSON Léa' },
+      totaux: { total: 800, regles: 800, impayes: 0 },
+      lignes: [{ type: 'loyer', loyers: 800, total: 800 }],
+    },
+  ],
+  recapitulatif_operations: [
+    { categorie: 'DL', fournisseur: 'PPR', description: 'entretien', montants: { debit: 80 } },
+    { categorie: 'DL', fournisseur: 'TOTAL', description: 'elec', montants: { debit: 120 } },
+  ],
+}
+
+// Nouvelle extraction : corrige les numéros de lot, mais agrège un libellé dans
+// le nom du locataire (régression du parser), change des montants, ajoute une
+// opération et en perd une autre.
+const next = {
+  metadata: {
+    document: { reference: '33680000', date: '2026-06-22' },
+    immeuble: { code: '33689020', adresse: '4 R. SERVIENT' },
+    solde: { montant: 11214.51, type: 'crediteur' },
+  },
+  situation_locataires: [
+    {
+      lot: { numero: '07', type: 'Appartement' },
+      locataire: { nom: 'LATAPY NINA Complément loyer' },
+      totaux: { total: 1250, regles: 1200, impayes: 50 },
+      lignes: [
+        { type: 'loyer', loyers: 500, total: 500 },
+        { type: 'complement', loyers: 50, total: 50 },
+      ],
+    },
+    {
+      lot: { numero: '08', type: 'Appartement' },
+      locataire: { nom: 'BESSON Léa' },
+      totaux: { total: 800, regles: 800, impayes: 0 },
+      lignes: [{ type: 'loyer', loyers: 800, total: 800 }],
+    },
+  ],
+  recapitulatif_operations: [
+    { categorie: 'DL', fournisseur: 'PPR', description: 'entretien', montants: { debit: 80 } },
+    { categorie: 'DL', fournisseur: 'NOUVEAU', description: 'ajout', montants: { debit: 42 } },
+  ],
+}
+
+const diff = computeExtractionDiff(previous, next)
+const merge = (selection) => mergeExtraction(previous, next, diff, selection)
+
+describe('découpage du diff', () => {
+  it('sépare les champs identitaires du bloc de montants', () => {
+    const latapy = diff.locataires.find((l) => l.index === 0)
+    expect(latapy.changes.map((c) => c.id)).toEqual([
+      'loc:0:locataire.nom',
+      'loc:0:lot.numero',
+      'loc:0:montants',
+    ])
+    // Le bloc de montants porte le détail, mais reste un seul changement.
+    const montants = latapy.changes.at(-1)
+    expect(montants.kind).toBe('montants')
+    expect(montants.fields.length).toBeGreaterThan(1)
+  })
+
+  it('marque comme imposée la seule réécriture de forme d’un numéro de lot', () => {
+    // Le backend normalise tout numéro de lot à l'enregistrement : refuser
+    // "0007" → "07" n'aurait aucun effet, la case ne doit pas le laisser croire.
+    const lot = diff.locataires[0].changes.find((c) => c.path === 'lot.numero')
+    expect(lot.forced).toBe(true)
+    expect(lot.editable).toBe(false)
+
+    const merged = merge({ [lot.id]: { accepted: false } })
+    expect(merged.situation_locataires[0].lot.numero).toBe('07')
+  })
+
+  it('laisse refusable un vrai changement de lot', () => {
+    const autreLot = {
+      ...next,
+      situation_locataires: [
+        { ...next.situation_locataires[0], lot: { numero: '12', type: 'Appartement' } },
+        next.situation_locataires[1],
+      ],
+    }
+    const d = computeExtractionDiff(previous, autreLot)
+    const lot = d.locataires[0].changes.find((c) => c.path === 'lot.numero')
+
+    expect(lot.forced).toBe(false) // "0007" et "12" ne sont pas le même lot
+    const merged = mergeExtraction(previous, autreLot, d, { [lot.id]: { accepted: false } })
+    expect(merged.situation_locataires[0].lot.numero).toBe('0007')
+  })
+
+  it('retient l’index d’origine des opérations supprimées', () => {
+    const removed = diff.operations.find((o) => o.kind === 'removed')
+    expect(removed.oldIndex).toBe(1) // TOTAL / elec
+  })
+})
+
+describe('fusion sélective', () => {
+  it('sans sélection, reproduit la nouvelle extraction', () => {
+    expect(merge({})).toEqual(next)
+  })
+
+  it('refuse un nom tout en gardant la correction du numéro de lot', () => {
+    // Le cas qui motive la maille fine : la régression sur le nom est écartée,
+    // la correction du lot est conservée, sur le même locataire.
+    const merged = merge({ 'loc:0:locataire.nom': { accepted: false } })
+    const latapy = merged.situation_locataires[0]
+
+    expect(latapy.locataire.nom).toBe('LATAPY NINA')
+    expect(latapy.lot.numero).toBe('07')
+    expect(latapy.totaux.total).toBe(1250) // montants acceptés
+  })
+
+  it('garde les anciens montants et lignes quand le bloc est refusé', () => {
+    const merged = merge({ 'loc:0:montants': { accepted: false } })
+    const latapy = merged.situation_locataires[0]
+
+    expect(latapy.totaux).toEqual(previous.situation_locataires[0].totaux)
+    expect(latapy.lignes).toEqual(previous.situation_locataires[0].lignes)
+    // Le refus des chiffres n'annule pas les champs identitaires acceptés.
+    expect(latapy.lot.numero).toBe('07')
+    expect(latapy.locataire.nom).toBe('LATAPY NINA Complément loyer')
+  })
+
+  it('écrit la valeur saisie à la main plutôt que celle proposée', () => {
+    const merged = merge({
+      'loc:0:locataire.nom': { accepted: true, value: 'LATAPY Nina' },
+      'meta:immeuble.adresse': { accepted: true, value: '4 rue Servient' },
+    })
+
+    expect(merged.situation_locataires[0].locataire.nom).toBe('LATAPY Nina')
+    expect(merged.metadata.immeuble.adresse).toBe('4 rue Servient')
+  })
+
+  it('laisse une métadonnée refusée à sa valeur en base', () => {
+    const merged = merge({ 'meta:immeuble.adresse': { accepted: false } })
+    expect(merged.metadata.immeuble.adresse).toBe('4 RUE SERVIENT')
+  })
+
+  it('écarte une opération ajoutée dont on ne veut pas', () => {
+    const added = diff.operations.find((o) => o.kind === 'added')
+    const merged = merge({ [added.id]: { accepted: false } })
+
+    expect(merged.recapitulatif_operations.map((o) => o.fournisseur)).toEqual(['PPR'])
+  })
+
+  it('réinsère à sa place une opération dont on refuse la suppression', () => {
+    const removed = diff.operations.find((o) => o.kind === 'removed')
+    const merged = merge({ [removed.id]: { accepted: false } })
+
+    expect(merged.recapitulatif_operations.map((o) => o.fournisseur)).toEqual([
+      'PPR',
+      'TOTAL', // restaurée à son index d'origine
+      'NOUVEAU',
+    ])
+  })
+
+  it('ne modifie pas les données d’origine', () => {
+    const avant = JSON.stringify(previous)
+    merge({ 'loc:0:montants': { accepted: false } })
+    expect(JSON.stringify(previous)).toBe(avant)
+  })
+})
+
+describe('locataires ajoutés ou supprimés', () => {
+  const avecAjout = {
+    ...next,
+    situation_locataires: [
+      ...next.situation_locataires,
+      { lot: { numero: '09' }, locataire: { nom: 'NOUVEAU LOCATAIRE' }, totaux: {}, lignes: [] },
+    ],
+  }
+  const diffAjout = computeExtractionDiff(previous, avecAjout)
+
+  it('n’ajoute pas un locataire refusé', () => {
+    const merged = mergeExtraction(previous, avecAjout, diffAjout, {
+      'loc:2:entier': { accepted: false },
+    })
+    expect(merged.situation_locataires).toHaveLength(2)
+  })
+
+  it('conserve un locataire dont on refuse la disparition', () => {
+    const sansBesson = {
+      ...next,
+      situation_locataires: next.situation_locataires.slice(0, 1),
+    }
+    const diffSuppr = computeExtractionDiff(previous, sansBesson)
+    const merged = mergeExtraction(previous, sansBesson, diffSuppr, {
+      'loc:1:entier': { accepted: false },
+    })
+
+    expect(merged.situation_locataires.map((l) => l.locataire.nom)).toEqual([
+      'LATAPY NINA Complément loyer',
+      'BESSON Léa',
+    ])
+  })
+})
+
+describe('comptage pour l’affichage', () => {
+  it('compte les changements retenus', () => {
+    const ids = listChangeIds(diff)
+    expect(countAccepted(ids, {})).toEqual({ accepted: ids.length, total: ids.length })
+    expect(countAccepted(ids, { [ids[0]]: { accepted: false } }).accepted).toBe(ids.length - 1)
+  })
+})