fix(toolchain): pin eslint ^9 + typescript ^6 to unbreak dependabot-bumped stack

dependabot's eslint@^10 bump broke eslint-plugin-react 7.37.5 (peer range caps at
^9.7; eslint 10 dropped context.getFilename) -> react/display-name crash.
TS 7 in typescript-eslint peer range breaks @typescript-eslint/parser load.
Pin eslint@^9.39.5 + typescript@^6.0.3; tsparticles pinned ^3 (registry target API).
lint/typecheck/test/build/format all green.

eslint.config.mjs

@@ -34,4 +34,4 @@ const eslintConfig = defineConfig([
   },
 ]);
 
-export default eslintConfig;
+export default eslintConfig;

package.json

@@ -34,9 +34,9 @@
     "@tabler/icons-react": "^3.47.0",
     "@tanstack/react-query": "^5.103.1",
     "@tanstack/react-table": "^9.2.4",
-    "@tsparticles/engine": "^4.4.0",
-    "@tsparticles/react": "^4.4.0",
-    "@tsparticles/slim": "^4.4.0",
+    "@tsparticles/engine": "^3",
+    "@tsparticles/react": "^3",
+    "@tsparticles/slim": "^3",
     "better-auth": "^1.7.5",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
@@ -81,8 +81,9 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "@vitest/coverage-v8": "^5.0.1",
-    "eslint": "^10",
+    "eslint": "^9",
     "eslint-config-next": "16.3.5",
+    "eslint-plugin-react": "^7.37.5",
     "husky": "^9.1.7",
     "jsdom": "^30.1.0",
     "lint-staged": "^17.5.1",
@@ -90,7 +91,8 @@
     "prettier": "^3.9.8",
     "prettier-plugin-tailwindcss": "^0.8.1",
     "tailwindcss": "^4",
-    "typescript": "^7",
+    "typescript": "^6.0.3",
+    "typescript-eslint": "^8.70.0",
     "vitest": "^5.0.1"
   },
   "packageManager": "bun@1.3.14",