chore: add eslint, prettier, husky and commitlint tooling

.cursor/rules/seahaven-admin.mdc

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+---
+description: SeaHaven Admin — arquitetura IrisLoan, convenções de rebuild seletivo
+alwaysApply: true
+---
+
+# SeaHaven Admin — convenções IrisLoan
+
+## Stack
+
+- Vite SPA + React Router 7, TypeScript strict, Tailwind v4 + MUI
+- HTTP: Ky com `credentials: "include"` (cookies httpOnly)
+- Server state: TanStack Query; forms: React Hook Form + Zod
+- **Não usar** em código novo: Next.js, Redux, axios, `apiUtil.js`, `tokenUtility.js`
+
+## Estrutura alvo (`src/`)
+
+```
+api/  domain/<feature>/  app/  infra/query-key/  lib/  hooks/
+components/ui|common|layout/  config/menu.ts  providers/  main.tsx
+```
+
+- Alias `@/` para imports; arquivos novos em **kebab-case** (`use-debounce.ts`, `query-key.ts`)
+- `pages/` é **somente referência** de endpoints e regras de negócio — deletar após entrega em `domain/` + `app/`
+
+## HTTP e auth
+
+- Centralizar paths em `api/api-paths.ts` e respostas em `api/handle-api-response.ts`
+- Auth via AuthProvider + cookies; não criar slices Redux para sessão
+
+## Estado e dados
+
+- Cache e mutations: React Query + `infra/query-key/query-key.ts`
+- Defaults do client em `lib/query/query-client.ts`
+
+## Forms e UI
+
+- Schemas Zod em `domain/<feature>/schemas/`; views finas em `app/`
+- Tailwind utilitário + componentes MUI; **não** importar `site.css` em código novo
+
+## Fluxo ao implementar feature
+
+1. Consultar legado em `pages/<feature>/` (endpoints, campos, regras)
+2. Criar `domain/<feature>/` (schemas, hooks, use-cases)
+3. View fina em `app/` + rota em `app/routes.tsx`
+4. Deletar `pages/<feature>/` quando a feature nova estiver pronta
+
+## Tooling
+
+- ESLint strict só em `.ts/.tsx` da arquitetura nova; legado em `pages/` ignorado
+- Commits: Conventional Commits (`feat(scope): subject`)
+
+Referência: `docs/ARCHITECTURE_PLAN.md`

.husky/commit-msg

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+npx commitlint --edit $1

.husky/pre-commit

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+npx lint-staged

.prettierignore

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+dist
+build
+node_modules
+coverage
+package-lock.json
+*.tsbuildinfo
+
+# Legacy — format incrementally when touched (lint-staged)
+src/pages/**
+src/**/*.js
+src/**/*.jsx
+src/**/*.css
+!src/styles/globals.css

.prettierrc

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+{
+  "semi": true,
+  "singleQuote": false,
+  "trailingComma": "all",
+  "printWidth": 100,
+  "tabWidth": 2,
+  "overrides": [
+    {
+      "files": "*.mdc",
+      "options": {
+        "parser": "markdown"
+      }
+    }
+  ]
+}

commitlint.config.js

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+export default { extends: ["@commitlint/config-conventional"] };

eslint.config.js

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+import js from "@eslint/js";
+import eslintConfigPrettier from "eslint-config-prettier";
+import pluginReactHooks from "eslint-plugin-react-hooks";
+import pluginReactRefresh from "eslint-plugin-react-refresh";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+
+const legacyIgnores = [
+  "src/pages/**",
+  "src/app/store.js",
+  "src/app/slices/**",
+  "src/lib/queryClient.js",
+  "src/hooks/**",
+  "src/components/**",
+  "src/constants/**",
+  "src/layouts/**",
+  "src/**/*.js",
+  "src/**/*.jsx",
+];
+
+export default tseslint.config(
+  {
+    ignores: ["dist/**", "build/**", "node_modules/**", "coverage/**", ...legacyIgnores],
+  },
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  eslintConfigPrettier,
+  {
+    files: [
+      "src/{api,domain,app,lib,providers,infra,config,hooks,components/auth}/**/*.{ts,tsx}",
+      "src/**/*.{ts,tsx}",
+      "vite.config.ts",
+    ],
+    languageOptions: {
+      ecmaVersion: "latest",
+      sourceType: "module",
+      globals: globals.browser,
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+    plugins: {
+      "react-hooks": pluginReactHooks,
+      "react-refresh": pluginReactRefresh,
+    },
+    rules: {
+      ...pluginReactHooks.configs.recommended.rules,
+      "react-hooks/set-state-in-effect": "off",
+      "react-hooks/exhaustive-deps": "warn",
+      "react-refresh/only-export-components": ["warn", { allowConstantExport: true }],
+      "@typescript-eslint/no-unused-vars": ["error", { argsIgnorePattern: "^_" }],
+      "@typescript-eslint/no-explicit-any": "warn",
+    },
+  },
+  {
+    files: ["vite.config.ts", "scripts/**/*.{js,mjs}"],
+    languageOptions: {
+      globals: globals.node,
+    },
+  },
+);