fix(lint): use eslint-config-next flat config

eslint-config-next 16.3.5 ships flat configs; feeding them through
FlatCompat wrapped the plugins and crashed lint with a circular-structure
JSON error. Import the flat config directly and drop @eslint/eslintrc.

bun.lock

@@ -84,7 +84,6 @@
         "zustand": "^4.5.7",
       },
       "devDependencies": {
-        "@eslint/eslintrc": "^3.3.7",
         "@tailwindcss/postcss": "^4.3.3",
         "@types/bcryptjs": "^3.0.0",
         "@types/bun": "^1.4.2",
@@ -1204,7 +1203,7 @@
 
     "glob-parent": ["glob-parent@6.0.2", "", { "dependencies": { "is-glob": "^4.0.3" } }, "sha512-XxwI8EOhVQgWp6iDL+3b0r86f4d6AX6zSU55HfB4ydCEuXLXc5FcYeOu+nnGftS4TEju/11rt4KJPTMgbfmv4A=="],
 
-    "globals": ["globals@14.0.0", "", {}, "sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ=="],
+    "globals": ["globals@16.4.0", "", {}, "sha512-ob/2LcVVaVGCYN+r14cnwnoDPUufjiYgSqRhiFD0Q1iI4Odora5RE8Iv1D24hAz5oMophRGkGz+yuvQmmUMnMw=="],
 
     "globalthis": ["globalthis@1.0.4", "", { "dependencies": { "define-properties": "^1.2.1", "gopd": "^1.0.1" } }, "sha512-DpLKbNU4WylpxJykQujfCcwYWiV/Jhm50Goo0wrVILAv5jOr9d+H+UR3PhSCD2rCCEIg0uc+G+muBTwD54JhDQ=="],
 
@@ -1850,6 +1849,8 @@
 
     "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
 
+    "@eslint/eslintrc/globals": ["globals@14.0.0", "", {}, "sha512-oahGvuMGQlPw/ivIYBjVSrWAfWLBeku5tpPE2fOPLi+WHffIWbuh2tCjhyQhTBPMf5E9jDEH4FOmTYgYwbKwtQ=="],
+
     "@img/sharp-wasm32/@emnapi/runtime": ["@emnapi/runtime@1.11.3", "", { "dependencies": { "tslib": "^2.4.0" } }, "sha512-Xz4Tpyki7XyrpbUK1jR1AhdAdaXyhhY4lZ3neLodmhpuWfy2PAQN5B46sAiU4liOXGLkHypn/qU+jvfWSCYYLA=="],
 
     "@next/eslint-plugin-next/@eslint-community/eslint-utils": ["@eslint-community/eslint-utils@4.9.1", "", { "dependencies": { "eslint-visitor-keys": "^3.4.3" }, "peerDependencies": { "eslint": "^6.0.0 || ^7.0.0 || >=8.0.0" } }, "sha512-phrYmNiYppR7znFEdqgfWHXR6NCkZEK7hwWDHZUjit/2/U0r6XvkDl0SYnoM51Hq7FhCGdLDT6zxCCOY1hexsQ=="],
@@ -1888,8 +1889,6 @@
 
     "bun-types/@types/node": ["@types/node@26.5.1", "", { "dependencies": { "undici-types": "~8.9.0" } }, "sha512-CzNm2FezW4VR/LjG6yUdiEgLE/rAQ9Slj5gCu/C2VrdcW7I0ahNZ8DRbHT7zOZ6r3ONgd/bsQIeSaoDGrd1C6g=="],
 
-    "eslint-config-next/globals": ["globals@16.4.0", "", {}, "sha512-ob/2LcVVaVGCYN+r14cnwnoDPUufjiYgSqRhiFD0Q1iI4Odora5RE8Iv1D24hAz5oMophRGkGz+yuvQmmUMnMw=="],
-
     "eslint-import-resolver-node/debug": ["debug@3.2.7", "", { "dependencies": { "ms": "^2.1.1" } }, "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ=="],
 
     "eslint-module-utils/debug": ["debug@3.2.7", "", { "dependencies": { "ms": "^2.1.1" } }, "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ=="],

eslint.config.js

@@ -1,17 +1,13 @@
-import { FlatCompat } from "@eslint/eslintrc";
 import tseslint from "typescript-eslint";
 // @ts-ignore -- no types for this plugin
 import drizzle from "eslint-plugin-drizzle";
-
+import nextVitals from "eslint-config-next/core-web-vitals";
-const compat = new FlatCompat({
-  baseDirectory: import.meta.dirname,
-});
 
 export default tseslint.config(
   {
     ignores: [".next"],
   },
-  ...compat.extends("next/core-web-vitals"),
+  ...nextVitals,
   {
     files: ["**/*.ts", "**/*.tsx"],
     plugins: {
@@ -58,4 +54,4 @@ export default tseslint.config(
       },
     },
   },
-);
+);

package.json

@@ -107,7 +107,6 @@
     "zustand": "^4.5.7"
   },
   "devDependencies": {
-    "@eslint/eslintrc": "^3.3.7",
     "@tailwindcss/postcss": "^4.3.3",
     "@types/bcryptjs": "^3.0.0",
     "@types/bun": "^1.4.2",