refactor(features): split entities into models/ + errors/ subdirs

All 5 features (auth, blog, marketing-pages, navigation; media has no
entities yet) now follow Lazar's pattern:
- entities/<x>.ts → entities/models/<x>.ts
- entities/errors.ts → entities/errors/<domain>.ts + errors/common.ts

Updates all import paths across factories, contracts, tests, use cases,
controllers, repositories, integrations, and src/index.ts exports.

navigation divergence: had no errors.ts; errors/header.ts +
errors/common.ts added as new forward-looking stubs.

Refactor log: docs/superpowers/refactor-logs/2026-05-05-lazar-pattern-conformance.md
Spec: §5, §9.3

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/blog/src/__factories__/article.factory.ts

@@ -1,5 +1,5 @@
 import { defineFactory } from "@repo/core-testing/factory";
-import type { Article } from "../entities/article.js";
+import type { Article } from "../entities/models/article.js";
 
 export const articleFactory = defineFactory<Article>(({ sequence }) => ({
   id: `article-${sequence}`,

packages/blog/src/application/repositories/articles-repository.interface.ts

@@ -1,4 +1,4 @@
-import type { Article } from "../../entities/article";
+import type { Article } from "../../entities/models/article";
 
 export interface IArticlesRepository {
   getArticle(id: string): Promise<Article | undefined>;

packages/blog/src/application/use-cases/create-article.use-case.ts

@@ -1,4 +1,4 @@
-import type { Article } from "../../entities/article";
+import type { Article } from "../../entities/models/article";
 import { blogContainer } from "../../di/container";
 import { BLOG_SYMBOLS } from "../../di/symbols";
 import type { IArticlesRepository } from "../repositories/articles-repository.interface";

packages/blog/src/application/use-cases/get-articles.use-case.ts

@@ -1,4 +1,4 @@
-import type { Article } from "../../entities/article";
+import type { Article } from "../../entities/models/article";
 import { blogContainer } from "../../di/container";
 import { BLOG_SYMBOLS } from "../../di/symbols";
 import type { IArticlesRepository } from "../repositories/articles-repository.interface";

packages/blog/src/entities/errors/article.ts

@@ -3,9 +3,3 @@ export class ArticleNotFoundError extends Error {
     super(message, options);
   }
 }
-
-export class InputParseError extends Error {
-  constructor(message: string, options?: ErrorOptions) {
-    super(message, options);
-  }
-}

packages/blog/src/entities/errors/common.ts

@@ -0,0 +1,5 @@
+export class InputParseError extends Error {
+  constructor(message: string, options?: ErrorOptions) {
+    super(message, options);
+  }
+}

packages/blog/src/entities/errors/errors.test.ts

@@ -1,5 +1,6 @@
 import { describe, expect, it } from "vitest";
-import { ArticleNotFoundError, InputParseError } from "./errors";
+import { ArticleNotFoundError } from "./article";
+import { InputParseError } from "./common";
 
 describe("ArticleNotFoundError", () => {
   it("uses the default message when none is given", () => {

packages/blog/src/index.ts

@@ -1,4 +1,5 @@
-export type { Article, ArticleStatus } from "./entities/article";
+export type { Article, ArticleStatus } from "./entities/models/article";
 export type { BlogRouter } from "./integrations/api/router";
-export { ArticleNotFoundError, InputParseError } from "./entities/errors";
+export { ArticleNotFoundError } from "./entities/errors/article";
+export { InputParseError } from "./entities/errors/common";
 export { articleBySlugQuery, listArticlesQuery } from "./ui/query";

packages/blog/src/infrastructure/repositories/mock-articles.repository.ts

@@ -2,7 +2,7 @@ import "reflect-metadata";
 import { injectable } from "inversify";
 
 import type { IArticlesRepository } from "../../application/repositories/articles-repository.interface";
-import type { Article } from "../../entities/article";
+import type { Article } from "../../entities/models/article";
 
 @injectable()
 export class MockArticlesRepository implements IArticlesRepository {

packages/blog/src/infrastructure/repositories/payload-articles.repository.ts

@@ -4,7 +4,7 @@ import { getPayload } from "payload";
 import type { SanitizedConfig } from "payload";
 
 import type { IArticlesRepository } from "../../application/repositories/articles-repository.interface";
-import type { Article } from "../../entities/article";
+import type { Article } from "../../entities/models/article";
 
 type PayloadArticleDoc = {
   id: string | number;

packages/blog/src/interface-adapters/controllers/articles.controller.test.ts

@@ -3,7 +3,7 @@ import { blogContainer } from "../../di/container";
 import { BLOG_SYMBOLS } from "../../di/symbols";
 import { MockArticlesRepository } from "../../infrastructure/repositories/mock-articles.repository";
 import type { IArticlesRepository } from "../../application/repositories/articles-repository.interface";
-import { InputParseError } from "../../entities/errors";
+import { InputParseError } from "../../entities/errors/common";
 import {
   createArticleController,
   getArticlesController,

packages/blog/src/interface-adapters/controllers/articles.controller.ts

@@ -1,7 +1,7 @@
 import { z } from "zod";
 
-import { InputParseError } from "../../entities/errors";
-import type { Article } from "../../entities/article";
+import { InputParseError } from "../../entities/errors/common";
+import type { Article } from "../../entities/models/article";
 import { blogContainer } from "../../di/container";
 import { BLOG_SYMBOLS } from "../../di/symbols";
 import type { IArticlesRepository } from "../../application/repositories/articles-repository.interface";