chore: migrate to @vigdorov/* shared configs (eslint, prettier, typescript, vite)

Replace project-local ESLint, Prettier, TypeScript, and Vite configs
with shared packages from dev-configs monorepo.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/.prettierrc

@@ -1,4 +0,0 @@
-{
-  "singleQuote": true,
-  "trailingComma": "all"
-}

frontend/eslint.config.js

@@ -1,41 +1,3 @@
-import js from '@eslint/js'
-import globals from 'globals'
-import reactHooks from 'eslint-plugin-react-hooks'
-import reactRefresh from 'eslint-plugin-react-refresh'
-import tseslint from 'typescript-eslint'
-import { defineConfig, globalIgnores } from 'eslint/config'
+import {react} from '@vigdorov/eslint-config';
 
-export default defineConfig([
-  globalIgnores(['dist', 'coverage', '*.config.ts', '*.config.js']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      js.configs.recommended,
-      ...tseslint.configs.strictTypeChecked,
-      reactHooks.configs.flat.recommended,
-      reactRefresh.configs.vite,
-    ],
-    languageOptions: {
-      ecmaVersion: 2020,
-      globals: globals.browser,
-      parserOptions: {
-        projectService: true,
-        tsconfigRootDir: import.meta.dirname,
-      },
-    },
-    rules: {
-      '@typescript-eslint/no-unnecessary-condition': 'error',
-      '@typescript-eslint/prefer-nullish-coalescing': 'error',
-      '@typescript-eslint/no-confusing-void-expression': 'off',
-      '@typescript-eslint/no-misused-promises': [
-        'error',
-        {
-          checksVoidReturn: {
-            attributes: false,
-          },
-        },
-      ],
-      'react-hooks/set-state-in-effect': 'off',
-    },
-  },
-])
+export default react();

frontend/package.json

@@ -30,18 +30,14 @@
     "zustand": "^5.0.9"
   },
   "devDependencies": {
-    "@eslint/js": "^9.39.1",
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.5",
     "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^5.1.1",
+    "@vigdorov/eslint-config": "^1.0.1",
+    "@vigdorov/typescript-config": "^1.1.0",
+    "@vigdorov/vite-config": "^1.0.0",
     "eslint": "^9.39.1",
-    "eslint-plugin-react-hooks": "^7.0.1",
-    "eslint-plugin-react-refresh": "^0.4.24",
-    "globals": "^16.5.0",
-    "prettier": "^3.4.2",
     "typescript": "~5.9.3",
-    "typescript-eslint": "^8.46.4",
     "vite": "^7.2.4"
   }
 }

frontend/tsconfig.app.json

@@ -1,27 +1,13 @@
 {
+  "extends": "@vigdorov/typescript-config/react",
   "compilerOptions": {
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
-    "target": "ES2022",
     "useDefineForClassFields": true,
-    "lib": ["ES2022", "DOM", "DOM.Iterable"],
-    "module": "ESNext",
     "types": ["vite/client"],
-    "skipLibCheck": true,
-
-    /* Bundler mode */
-    "moduleResolution": "bundler",
-    "allowImportingTsExtensions": true,
     "verbatimModuleSyntax": true,
-    "moduleDetection": "force",
-    "noEmit": true,
-    "jsx": "react-jsx",
-
-    /* Linting */
-    "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "erasableSyntaxOnly": true,
-    "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
   "include": ["src"]

frontend/tsconfig.node.json

@@ -1,25 +1,17 @@
 {
+  "extends": "@vigdorov/typescript-config/base",
   "compilerOptions": {
     "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
     "target": "ES2023",
     "lib": ["ES2023"],
-    "module": "ESNext",
     "types": ["node"],
-    "skipLibCheck": true,
-
-    /* Bundler mode */
-    "moduleResolution": "bundler",
     "allowImportingTsExtensions": true,
     "verbatimModuleSyntax": true,
     "moduleDetection": "force",
     "noEmit": true,
-
-    /* Linting */
-    "strict": true,
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "erasableSyntaxOnly": true,
-    "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
   "include": ["vite.config.ts"]

frontend/vite.config.ts

@@ -1,16 +1,18 @@
-import { defineConfig } from 'vite'
-import react from '@vitejs/plugin-react'
+import {spa} from '@vigdorov/vite-config';
+import {mergeConfig} from 'vite';
 
-// https://vite.dev/config/
-export default defineConfig({
-  plugins: [react()],
-  server: {
-    port: 4000,
-    proxy: {
-      '/api': {
-        target: 'http://localhost:4001',
-        changeOrigin: true,
-      },
+export default mergeConfig(
+    spa({
+        port: 4000,
+    }),
+    {
+        server: {
+            proxy: {
+                '/api': {
+                    target: 'http://localhost:4001',
+                    changeOrigin: true,
+                },
+            },
+        },
     },
-  },
-})
+);