fix(deps): migrate off abandoned react-router-dom, fix eslint's own brace-expansion

Two real, forward-compatible fixes for npm audit's high-severity
advisories (not the downgrades npm audit fix --force offers):

- react-router (GHSA-qwww-vcr4-c8h2, RSC CSRF bypass): react-router-dom
  is frozen at 7.18.1, pinning the vulnerable react-router@7.18.1 -- no
  newer react-router-dom release exists pointing at the fixed line.
  react-router itself has shipped the real fix at 8.3.0. Migrated the 9
  files importing from react-router-dom (all using plain
  createBrowserRouter/RouterProvider/useLocation/useNavigate/Outlet, no
  RSC anywhere) to import from react-router directly instead.

- brace-expansion/minimatch (GHSA-mh99-v99m-4gvg): fixed for eslint's
  own dependency chain (minimatch@10.2.5, used by eslint itself,
  storybook, typescript-eslint, swagger-client) via a scoped
  "minimatch@^10" override forcing brace-expansion to the now-published
  5.0.8 patch -- within the range minimatch@10.2.5 already declares
  wanting (^5.0.5), so this isn't a version-pin workaround, just
  unblocking a patch release npm's resolver hadn't picked up.

One advisory remains genuinely unfixable from our side:
eslint-plugin-jsx-a11y pins minimatch@^3.1.2 (old major, never
patched); forcing it to the 10.x line via override breaks npm's own
dependency-tree validation (a real incompatibility, not just an npm
quirk), so this needs an eslint-plugin-jsx-a11y release bumping its own
minimatch. Lint-time only, no untrusted input reaches it -- ci.yml's
Audit step comment updated to reflect the new, smaller remaining scope.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/package-lock.json

@@ -25,7 +25,7 @@
         "react-dom": "^19.2.8",
         "react-hook-form": "^7.82.0",
         "react-i18next": "^17.0.10",
-        "react-router-dom": "^7.18.1",
+        "react-router": "^8.3.0",
         "swagger-ui-react": "^5.32.11",
         "uplot": "^1.6.32",
         "zod": "^4.4.3"
@@ -5777,15 +5777,15 @@
       }
     },
     "node_modules/brace-expansion": {
-      "version": "5.0.7",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.7.tgz",
-      "integrity": "sha512-7oFy703dxfY3/NLxC1fh2SUCQ0H9rmAY+5EpDVfXjUTTs+HEwR2nYaqLv+GWcTsumwxPfiz6CzCNkwXwBUwqCA==",
+      "version": "5.0.8",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.8.tgz",
+      "integrity": "sha512-JZyDyq3D4AUifKTPOB7DELf6XsB3WdPuNxCtob1vFXPsSXhdAiHBWJ/tJ8HAc9aH84BK+5JFZLNkJKx3G9kzQg==",
       "license": "MIT",
       "dependencies": {
         "balanced-match": "^4.0.2"
       },
       "engines": {
-        "node": "18 || 20 || >=22"
+        "node": "20 || >=22"
       }
     },
     "node_modules/browserslist": {
@@ -6187,6 +6187,7 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/cookie/-/cookie-1.1.1.tgz",
       "integrity": "sha512-ei8Aos7ja0weRpFzJnEA9UHJ/7XQmqglbRwnf2ATjcB9Wq874VKH9kfjjirM6UhU2/E5fFYadylyhFldcqSidQ==",
+      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=18"
@@ -6196,6 +6197,12 @@
         "url": "https://opencollective.com/express"
       }
     },
+    "node_modules/cookie-es": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/cookie-es/-/cookie-es-3.1.1.tgz",
+      "integrity": "sha512-UaXxwISYJPTr9hwQxMFYZ7kNhSXboMXP+Z3TRX6f1/NyaGPfuNUZOWP1pUEb75B2HjfklIYLVRfWiFZJyC6Npg==",
+      "license": "MIT"
+    },
     "node_modules/copy-to-clipboard": {
       "version": "3.3.3",
       "resolved": "https://registry.npmjs.org/copy-to-clipboard/-/copy-to-clipboard-3.3.3.tgz",
@@ -10176,20 +10183,19 @@
       }
     },
     "node_modules/react-router": {
-      "version": "7.18.1",
-      "resolved": "https://registry.npmjs.org/react-router/-/react-router-7.18.1.tgz",
-      "integrity": "sha512-GDLgg3i3uM0aeJO3Fm+TCS+sDQ7gu12T6x0qdTEzcwqEfleci7JwugVNIF3U//0FWKnJT7ptG+20B2jfDqnZAg==",
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/react-router/-/react-router-8.3.0.tgz",
+      "integrity": "sha512-qyPMvW83jGIct3yiieisxdk9M745anqhpIMKN5m1t6yBMfgVPpt77aHOqs5fUlEJRMCGffg9BaQLH9oPVOL7xQ==",
       "license": "MIT",
       "dependencies": {
-        "cookie": "^1.0.1",
-        "set-cookie-parser": "^2.6.0"
+        "cookie-es": "^3.1.1"
       },
       "engines": {
-        "node": ">=20.0.0"
+        "node": ">=22.22.0"
       },
       "peerDependencies": {
-        "react": ">=18",
-        "react-dom": ">=18"
+        "react": ">=19.2.7",
+        "react-dom": ">=19.2.7"
       },
       "peerDependenciesMeta": {
         "react-dom": {
@@ -10197,28 +10203,6 @@
         }
       }
     },
-    "node_modules/react-router-dom": {
-      "version": "7.18.1",
-      "resolved": "https://registry.npmjs.org/react-router-dom/-/react-router-dom-7.18.1.tgz",
-      "integrity": "sha512-KaZh+X/6UtEp28x51AUYZDMg9NGoz2ja3dNHa+ta/tk40vCzKhQ/RypCWBMLbmDr6//E24Vv5uPsrqXFozdkAg==",
-      "license": "MIT",
-      "dependencies": {
-        "react-router": "7.18.1"
-      },
-      "engines": {
-        "node": ">=20.0.0"
-      },
-      "peerDependencies": {
-        "react": ">=18",
-        "react-dom": ">=18"
-      }
-    },
-    "node_modules/react-router/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/react-syntax-highlighter": {
       "version": "16.1.1",
       "resolved": "https://registry.npmjs.org/react-syntax-highlighter/-/react-syntax-highlighter-16.1.1.tgz",