fix(deps): react-router-dom v6.30.6 -> v7.18.3 (CVE: Open-Redirect/Constructor-Injection)

GHSA-wrjc-x8rr-h8h6 + GHSA-337j-9hxr-rhxg betrafen die gesamte 6.x-Reihe,
kein gepatchtes 6.x verfügbar - v7 war die einzige Lösung. Projekt nutzt
nur den klassischen Declarative-Router (BrowserRouter/Routes/Route,
useNavigate/useParams/useSearchParams), keine Data-Router-APIs
(loaders/actions) - v7 ist dafür API-kompatibel, keine Code-Änderung nötig.
Typecheck/Build/alle 16 Vitest-Tests grün, npm audit --omit=dev jetzt 0
Vulnerabilities.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CVgbozhYmuEhiEJHffRXCV

frontend/package-lock.json

@@ -17,7 +17,7 @@
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "react-grid-layout": "^2.2.4",
-        "react-router-dom": "^6.26.2",
+        "react-router-dom": "^7.18.3",
         "tailwind-merge": "^3.6.0"
       },
       "devDependencies": {
@@ -2299,15 +2299,6 @@
         }
       }
     },
-    "node_modules/@remix-run/router": {
-      "version": "1.23.4",
-      "resolved": "https://registry.npmjs.org/@remix-run/router/-/router-1.23.4.tgz",
-      "integrity": "sha512-q7j5geK7xs3UJSdm9/iytUNclBnLmYx1EnSeCFXHPeutdqgIMeFeHtUZgS3EhlKxdBEAu8OwtJCwmLrEzpSs7Q==",
-      "license": "MIT",
-      "engines": {
-        "node": ">=14.0.0"
-      }
-    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-beta.27",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
@@ -3903,6 +3894,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/cookie": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.1.1.tgz",
+      "integrity": "sha512-ei8Aos7ja0weRpFzJnEA9UHJ/7XQmqglbRwnf2ATjcB9Wq874VKH9kfjjirM6UhU2/E5fFYadylyhFldcqSidQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/core-js-compat": {
       "version": "3.50.0",
       "resolved": "https://registry.npmjs.org/core-js-compat/-/core-js-compat-3.50.0.tgz",
@@ -6447,35 +6451,41 @@
       }
     },
     "node_modules/react-router": {
-      "version": "6.30.6",
-      "resolved": "https://registry.npmjs.org/react-router/-/react-router-6.30.6.tgz",
-      "integrity": "sha512-5HfK7k5im7LTOB0EqCQmfvy4C13G92Ssj1VTmouTK3AJvyjKTnFuCV0vcMAD/JS+JC4DvDIBRrlAeJIFjh5VWg==",
+      "version": "7.18.3",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-7.18.3.tgz",
+      "integrity": "sha512-gyXgtdr5uACJ5b1Q4udzjVV+tb/rlHIMJKuJ0e89R4Kzgz47z/rgP0dIKxktqIEUhDHluGTPJJH/wRha7CyqsA==",
       "license": "MIT",
       "dependencies": {
-        "@remix-run/router": "1.23.4"
+        "cookie": "^1.0.1",
+        "set-cookie-parser": "^2.6.0"
       },
       "engines": {
-        "node": ">=14.0.0"
+        "node": ">=20.0.0"
       },
       "peerDependencies": {
-        "react": ">=16.8"
+        "react": ">=18",
+        "react-dom": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "react-dom": {
+          "optional": true
+        }
       }
     },
     "node_modules/react-router-dom": {
-      "version": "6.30.6",
-      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-6.30.6.tgz",
-      "integrity": "sha512-0RHKZz7wwffvkU+2MFVT2NnjK44ssLEV+m0CAJaS2Ksmorrwj7WxH00jO0SOCW26/tINUnJHToXblDs33I38YQ==",
+      "version": "7.18.3",
+      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.18.3.tgz",
+      "integrity": "sha512-ytVbyBBM7vMfRCam25r0WMhSVSom909A8p+8m0/f1w853dz/xfFu6etAT2SEbVoSnI+ZoPRDqIsQXVT89gp7kg==",
       "license": "MIT",
       "dependencies": {
-        "@remix-run/router": "1.23.4",
-        "react-router": "6.30.6"
+        "react-router": "7.18.3"
       },
       "engines": {
-        "node": ">=14.0.0"
+        "node": ">=20.0.0"
       },
       "peerDependencies": {
-        "react": ">=16.8",
-        "react-dom": ">=16.8"
+        "react": ">=18",
+        "react-dom": ">=18"
       }
     },
     "node_modules/redent": {
@@ -6789,6 +6799,12 @@
         "node": ">=20.0.0"
       }
     },
+    "node_modules/set-cookie-parser": {
+      "version": "2.7.2",
+      "resolved": "https://registry.npmjs.org/set-cookie-parser/-/set-cookie-parser-2.7.2.tgz",
+      "integrity": "sha512-oeM1lpU/UvhTxw+g3cIfxXHyJRc/uidd3yK1P242gzHds0udQBYzs3y8j4gCCW+ZJ7ad0yctld8RYO+bdurlvw==",
+      "license": "MIT"
+    },
     "node_modules/set-function-length": {
       "version": "1.2.2",
       "resolved": "https://registry.npmjs.org/set-function-length/-/set-function-length-1.2.2.tgz",

frontend/package.json

@@ -22,7 +22,7 @@
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-grid-layout": "^2.2.4",
-    "react-router-dom": "^6.26.2",
+    "react-router-dom": "^7.18.3",
     "tailwind-merge": "^3.6.0"
   },
   "devDependencies": {