ci(lint): run frontend linting tools on CI

.github/workflows/build.yml

@@ -33,6 +33,11 @@ on:
         default: ${{ github.ref }}
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - run: npm run lint
+
   build:
     permissions:
       contents: write
@@ -164,4 +169,4 @@ jobs:
             name="${{ inputs.asset-prefix }}_${{ inputs.platform }}_$(basename "$file")"
             echo "Uploading $name, file: $file"
             zip -j - "$file" | gh-actions-artifact-client.js upload "${name}" --retentionDays=7
-          done
+          done

eslint.config.mjs

@@ -0,0 +1,74 @@
+import { defineConfig } from "eslint/config";
+import typeScript from '@typescript-eslint/eslint-plugin';
+import typeScriptParser from '@typescript-eslint/parser';
+import react from "eslint-plugin-react";
+import reactHooks from "eslint-plugin-react-hooks";
+import imports from 'eslint-plugin-import';
+import unusedImports from 'eslint-plugin-unused-imports';
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default defineConfig([
+  {
+    files: [
+      "src/**/*.ts",
+      "src/**/*.tsx",
+    ],
+
+    languageOptions: {
+      parser: typeScriptParser,
+      parserOptions: {
+        "tsx": true,
+        "jsx": true,
+        "js": true,
+        "useJSXTextNode": true,
+        "project": "./tsconfig.json",
+        "tsconfigRootDir": "."
+      },
+    },
+
+    extends: compat.extends(
+        "eslint:recommended",
+        "plugin:react/recommended",
+        "plugin:@typescript-eslint/recommended",
+        "plugin:prettier/recommended",
+    ),
+
+    plugins: {
+        react,
+        typeScript,
+        imports,
+        unusedImports,
+    },
+
+    settings: {
+      react: {
+        version: 'detect',
+      },
+    },
+
+    rules: {
+        semi: ["error", "always"],
+        quotes: ["error", "single"],
+
+        "no-unused-vars": ["error", {
+            argsIgnorePattern: "^_",
+        }],
+
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/no-explicit-any": "warn",
+        "react/react-in-jsx-scope": "off",
+    },
+  },
+  reactHooks.configs['recommended-latest'],
+]);