.kilo/plans/870.md

@@ -0,0 +1,82 @@
+# Fix Plan: TS2459 PostFormSubmitPayload not exported
+
+## 1. Root Cause
+
+`frontend/src/app/features/admin/blog/blog-form.pure.ts` declares `PostFormSubmitPayload` and `PostFormMode` as exports, but `frontend/src/app/features/admin/blog/blog-form-modal.component.ts` only **imports** them — it does not re-export them.
+
+`frontend/src/app/features/admin/blog/blog.component.ts:10` imports `PostFormSubmitPayload` from `./blog-form-modal.component`, which has no such export. Under `ng build --configuration production` (which uses `compilationMode: "full"` Angular strict template/type-check), this is a hard `TS2459` error and the bundle fails.
+
+The existing codebase convention is the opposite: `category-form-modal.component.ts` declares `CategoryFormSubmit` / `CategoryFormMode` **inside** the modal file and consumers (`categories.component.ts`) import them from the modal component directly. My initial layout diverged from that pattern by colocating the modal-output types in the `.pure.ts` module.
+
+## 2. Fix (chosen approach: match the existing `CategoryFormSubmit` convention)
+
+Move the two UI-emit types out of `blog-form.pure.ts` and into `blog-form-modal.component.ts`, then update the two importers.
+
+### 2.1 `frontend/src/app/features/admin/blog/blog-form-modal.component.ts` (modify)
+
+Add at the top (right after the existing imports from `./blog-form.pure`):
+
+```ts
+export type PostFormMode = 'create' | 'edit';
+
+export interface PostFormSubmitPayload {
+  mode: PostFormMode;
+  title: string;
+  bodyMd: string;
+  action: 'draft' | 'publish';
+}
+```
+
+Remove these two names from the import list at line 19-20:
+
+```ts
+// before
+import {
+  PostFormGroup,
+  PostFormMode,        // ← remove
+  PostFormSubmitPayload, // ← remove
+  buildPostBody,
+  syncPostForm,
+  validatePostForm,
+} from './blog-form.pure';
+
+// after
+import {
+  PostFormGroup,
+  buildPostBody,
+  syncPostForm,
+  validatePostForm,
+} from './blog-form.pure';
+```
+
+`PostFormGroup` stays imported from the `.pure.ts` module (it is the pure form-shape type, used internally by the modal).
+
+### 2.2 `frontend/src/app/features/admin/blog/blog-form.pure.ts` (modify)
+
+Remove the two declarations (lines 4 and 11-16) so the pure module no longer leaks UI-emit types:
+
+- Delete `export type PostFormMode = 'create' | 'edit';`
+- Delete the entire `export interface PostFormSubmitPayload { ... }` block.
+
+Keep the rest of the file unchanged:
+- `PostFormGroup`
+- `MAX_TITLE_LENGTH` / `MAX_BODY_LENGTH`
+- `validatePostForm`, `syncPostForm`, `buildPostBody`, `statusBadgeClass`, `statusLabel`
+
+### 2.3 No other edits required
+
+- `frontend/src/app/features/admin/blog/blog.component.ts` already imports `PostFormSubmitPayload` from `./blog-form-modal.component` — after step 2.1 that import resolves correctly. No change.
+- `tests/frontend/blog-admin-form.spec.ts` does **not** import `PostFormMode` or `PostFormSubmitPayload` (verified — only `PostFormGroup`, `buildPostBody`, `statusBadgeClass`, `statusLabel`, `syncPostForm`, `validatePostForm`). No change.
+- `tests/frontend/blog-page.spec.ts` is unaffected.
+
+## 3. Verification
+
+After the fix:
+
+1. `cd /repo && npx ng build --configuration production` must succeed (the original failing command).
+2. `cd /repo && npm test` must continue to pass (89 suites, 678 tests).
+3. The `BlogFormModalComponent.submit` output still emits the same `PostFormSubmitPayload` shape — `blog.component.ts:onFormSubmit` is unchanged.
+
+## 4. Why this fix over the alternative
+
+Alternative considered: change the import in `blog.component.ts` from `'./blog-form-modal.component'` to `'./blog-form.pure'`. This is a one-line change but it diverges from the established `CategoryFormSubmit` pattern (modal-emit types live with the modal), and it forces every future consumer of the form payload to import from the `.pure.ts` module instead of the modal. The chosen fix aligns this feature with the rest of the codebase and keeps the modal's public API self-contained.

.kilo/plans/913-build-fix.md

@@ -1,70 +0,0 @@
-# Implementation Plan: Fix Job 913 Build Error (missing `auth` injection in AdminUsersComponent)
-
-## 1. Root cause
-The `onToggleRole` handler added in the previous turn calls
-`this.auth.currentUser()`, `this.auth.applyPeerRoleChange(...)`, and
-`this.auth.publishRoleChange(...)`
-(`frontend/src/app/features/admin/admin-users.component.ts:244-247`), but
-`AdminUsersComponent` never declared an `auth` field. The component only injects
-`AdminService` (`admin`) and `NotificationService` (`notify`). TypeScript build
-(`ng build --configuration production`) therefore fails with `TS2339: Property
-'auth' does not exist on type 'AdminUsersComponent'` at lines 244, 246, 247.
-
-The Jest tests passed because they exercise pure modules and
-`admin-players.pure`, not the component class — so the missing field was not
-caught at test time.
-
-## 2. Required changes (single file)
-
-**File:** `frontend/src/app/features/admin/admin-users.component.ts`
-
-1. **Add the import** alongside the existing core-service imports (lines 10-11
-   currently import `AdminService` and `NotificationService`):
-
-```ts
-import { AuthService, AdminUser } from '...';
-```
-
-The `AdminUser` type can be left on the existing `AdminService` import line. We
-must add `AuthService` and import only the value (not the type) — `AuthService`
-is the singleton provided in `'root'` by `core/services/auth.service.ts`.
-
-The accurate edit is:
-
-- Replace the existing `import { AdminService, AdminUser } from '...admin.service';`
-  with two separate imports, or add the new import:
-
-```ts
-import { AdminService, AdminUser } from '../../core/services/admin.service';
-import { AuthService } from '../../core/services/auth.service';
-```
-
-2. **Inject the service** alongside the two existing injections (lines ~170-171):
-
-```ts
-private readonly admin = inject(AdminService);
-private readonly notify = inject(NotificationService);
-private readonly auth = inject(AuthService);
-```
-
-That is the only change required — the existing `onToggleRole` body already
-references `this.auth.currentUser`, `this.auth.applyPeerRoleChange`, and
-`this.auth.publishRoleChange`, all of which exist on `AuthService`.
-
-## 3. Verification
-
-- `npm --workspace frontend run build` should pass (no TypeScript errors).
-- `npm test` should still pass — the existing pure tests
-  (`tests/frontend/admin-players.pure.spec.ts`,
-  `tests/frontend/auth-session-events.spec.ts`,
-  `tests/backend/admin-players.spec.ts`) are unaffected by adding the
-  injection.
-- No public API, route, store, or service signature changes are required.
-
-## 4. Out of scope
-
-- No backend changes.
-- No test additions (the build error is a pure TypeScript declaration
-  issue; tests already cover the behaviour).
-- No re-architecture of cross-tab role-change handling — the previous turn's
-  implementation is correct, only the missing field declaration is needed.

backend/src/modules/blog/admin-blog.controller.ts

@@ -0,0 +1,73 @@
+import {
+  Body,
+  Controller,
+  Delete,
+  Get,
+  HttpCode,
+  Param,
+  Post,
+  Put,
+  UseGuards,
+} from '@nestjs/common';
+import { ApiBearerAuth, ApiOperation, ApiTags } from '@nestjs/swagger';
+import { AdminGuard } from '../../common/guards/admin.guard';
+import { Roles } from '../../common/decorators/roles.decorator';
+import { ZodValidationPipe } from '../../common/pipes/zod-validation.pipe';
+import {
+  AdminBlogPost,
+  CreatePostPayload,
+  CreatePostSchema,
+  PostIdParamSchema,
+  UpdatePostPayload,
+  UpdatePostSchema,
+} from './dto/blog.dto';
+import { AdminBlogService } from './admin-blog.service';
+
+@ApiTags('admin')
+@ApiBearerAuth()
+@Controller('api/v1/admin/blog/posts')
+@UseGuards(AdminGuard)
+@Roles('admin')
+export class AdminBlogController {
+  constructor(private readonly admin: AdminBlogService) {}
+
+  @Get()
+  @ApiOperation({ summary: 'List all blog posts (admin only, drafts included)' })
+  async list(): Promise<AdminBlogPost[]> {
+    return this.admin.listAll();
+  }
+
+  @Get(':id')
+  @ApiOperation({ summary: 'Get a single blog post by id (admin only)' })
+  async getOne(
+    @Param(new ZodValidationPipe(PostIdParamSchema)) params: { id: string },
+  ): Promise<AdminBlogPost> {
+    return this.admin.getById(params.id);
+  }
+
+  @Post()
+  @ApiOperation({ summary: 'Create a new blog post (admin only)' })
+  async create(
+    @Body(new ZodValidationPipe(CreatePostSchema)) body: CreatePostPayload,
+  ): Promise<AdminBlogPost> {
+    return this.admin.create(body);
+  }
+
+  @Put(':id')
+  @ApiOperation({ summary: 'Update a blog post (admin only)' })
+  async update(
+    @Param(new ZodValidationPipe(PostIdParamSchema)) params: { id: string },
+    @Body(new ZodValidationPipe(UpdatePostSchema)) body: UpdatePostPayload,
+  ): Promise<AdminBlogPost> {
+    return this.admin.update(params.id, body);
+  }
+
+  @Delete(':id')
+  @HttpCode(204)
+  @ApiOperation({ summary: 'Delete a blog post (admin only)' })
+  async remove(
+    @Param(new ZodValidationPipe(PostIdParamSchema)) params: { id: string },
+  ): Promise<void> {
+    await this.admin.remove(params.id);
+  }
+}

backend/src/modules/blog/admin-blog.service.ts

@@ -0,0 +1,82 @@
+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+import { v4 as uuid } from 'uuid';
+import { BlogPostEntity } from '../../database/entities/blog-post.entity';
+import { ApiError } from '../../common/errors/api-error';
+import { AdminBlogPost, CreatePostPayload, UpdatePostPayload } from './dto/blog.dto';
+
+@Injectable()
+export class AdminBlogService {
+  constructor(
+    @InjectRepository(BlogPostEntity)
+    private readonly posts: Repository<BlogPostEntity>,
+  ) {}
+
+  async listAll(): Promise<AdminBlogPost[]> {
+    const rows = await this.posts.find({ order: { updatedAt: 'DESC' } });
+    return rows.map((r) => this.toView(r));
+  }
+
+  async getById(id: string): Promise<AdminBlogPost> {
+    const row = await this.posts.findOne({ where: { id } });
+    if (!row) throw ApiError.notFound('Post not found');
+    return this.toView(row);
+  }
+
+  async create(payload: CreatePostPayload): Promise<AdminBlogPost> {
+    const status = payload.status ?? 'draft';
+    const row = this.posts.create({
+      id: uuid(),
+      title: payload.title.trim(),
+      bodyMd: payload.bodyMd ?? '',
+      status,
+      publishedAt: status === 'published' ? new Date().toISOString() : null,
+    });
+    await this.posts.save(row);
+    return this.toView(row);
+  }
+
+  async update(id: string, payload: UpdatePostPayload): Promise<AdminBlogPost> {
+    const row = await this.posts.findOne({ where: { id } });
+    if (!row) throw ApiError.notFound('Post not found');
+
+    if (payload.title !== undefined) row.title = payload.title.trim();
+    if (payload.bodyMd !== undefined) row.bodyMd = payload.bodyMd;
+
+    if (payload.status !== undefined) {
+      if (payload.status === 'published') {
+        row.status = 'published';
+        // Only stamp publishedAt if this post has never been published before;
+        // preserve the original publishedAt for re-publications.
+        if (!row.publishedAt) {
+          row.publishedAt = new Date().toISOString();
+        }
+      } else if (payload.status === 'draft') {
+        row.status = 'draft';
+        // preserve publishedAt so a later re-publish keeps the original publication timestamp.
+      }
+    }
+
+    await this.posts.save(row);
+    return this.toView(row);
+  }
+
+  async remove(id: string): Promise<void> {
+    const row = await this.posts.findOne({ where: { id } });
+    if (!row) throw ApiError.notFound('Post not found');
+    await this.posts.delete({ id });
+  }
+
+  private toView(r: BlogPostEntity): AdminBlogPost {
+    return {
+      id: r.id,
+      title: r.title,
+      bodyMd: r.bodyMd ?? '',
+      status: r.status,
+      createdAt: r.createdAt,
+      updatedAt: r.updatedAt,
+      publishedAt: r.publishedAt ?? null,
+    };
+  }
+}

backend/src/modules/blog/blog.module.ts

@@ -3,10 +3,12 @@ import { TypeOrmModule } from '@nestjs/typeorm';
 import { BlogPostEntity } from '../../database/entities/blog-post.entity';
 import { BlogController } from './blog.controller';
 import { BlogService } from './blog.service';
+import { AdminBlogController } from './admin-blog.controller';
+import { AdminBlogService } from './admin-blog.service';
 
 @Module({
   imports: [TypeOrmModule.forFeature([BlogPostEntity])],
-  controllers: [BlogController],
+  controllers: [BlogController, AdminBlogController],
-  providers: [BlogService],
+  providers: [BlogService, AdminBlogService],
 })
 export class BlogModule {}

backend/src/modules/blog/dto/blog.dto.ts

@@ -12,3 +12,39 @@ export const PublicBlogListSchema = z.object({
   posts: z.array(PublicBlogPostSchema),
 });
 export type PublicBlogList = z.infer<typeof PublicBlogListSchema>;
+
+export const AdminBlogPostSchema = z.object({
+  id: z.string(),
+  title: z.string(),
+  bodyMd: z.string(),
+  status: z.enum(['draft', 'published']),
+  createdAt: z.string(),
+  updatedAt: z.string(),
+  publishedAt: z.string().nullable(),
+});
+export type AdminBlogPost = z.infer<typeof AdminBlogPostSchema>;
+
+export const CreatePostSchema = z.object({
+  title: z
+    .string()
+    .min(1, 'Title is required')
+    .max(200, 'Title must be at most 200 characters')
+    .refine((t) => t.trim().length > 0, { message: 'Title is required' }),
+  bodyMd: z.string().max(200_000, 'Body must be at most 200000 characters').default(''),
+  status: z.enum(['draft', 'published']).optional(),
+});
+export type CreatePostPayload = z.infer<typeof CreatePostSchema>;
+
+export const UpdatePostSchema = z.object({
+  title: z
+    .string()
+    .min(1, 'Title is required')
+    .max(200, 'Title must be at most 200 characters')
+    .refine((t) => t.trim().length > 0, { message: 'Title is required' })
+    .optional(),
+  bodyMd: z.string().max(200_000, 'Body must be at most 200000 characters').optional(),
+  status: z.enum(['draft', 'published']).optional(),
+});
+export type UpdatePostPayload = z.infer<typeof UpdatePostSchema>;
+
+export const PostIdParamSchema = z.object({ id: z.string().min(1).max(64) });

docs/api/blog.md

@@ -0,0 +1,71 @@
+---
+type: api
+title: Blog Endpoints
+description: Public blog listing and administrator-only post management endpoints.
+tags: [api, blog, admin, markdown]
+timestamp: 2026-07-23T10:12:24Z
+---
+
+# Endpoints
+
+| Method | Path | Access | Behavior |
+|---|---|---|---|
+| `GET` | `/api/v1/blog/posts` | Public | Returns published posts only, newest publication first. |
+| `GET` | `/api/v1/admin/blog/posts` | Admin | Returns drafts and published posts, ordered by most recently updated. |
+| `GET` | `/api/v1/admin/blog/posts/:id` | Admin | Returns one post or `404 NOT_FOUND`. |
+| `POST` | `/api/v1/admin/blog/posts` | Admin + CSRF | Creates a draft or published post; defaults to draft. |
+| `PUT` | `/api/v1/admin/blog/posts/:id` | Admin + CSRF | Partially updates title, Markdown body, or status. |
+| `DELETE` | `/api/v1/admin/blog/posts/:id` | Admin + CSRF | Deletes a post and returns `204`; missing posts return `404 NOT_FOUND`. |
+
+The public route is marked `@Public()`. Admin routes require a Bearer JWT with the administrator role, and unsafe requests use the standard CSRF cookie/header contract from [REST API Overview](/api/rest-overview.md).
+
+# Schema
+
+## Public list response
+
+```json
+{
+  "posts": [
+    {
+      "id": "post-id",
+      "title": "Event update",
+      "publishedAt": "2026-07-23T10:00:00.000Z",
+      "bodyMd": "# Welcome"
+    }
+  ]
+}
+```
+
+Drafts and administrative fields such as `status`, `createdAt`, and `updatedAt` are excluded.
+
+## Admin post
+
+| Field | Type | Description |
+|---|---|---|
+| `id` | string | Server-generated UUID. |
+| `title` | string | Trimmed title, required, maximum 200 characters. |
+| `bodyMd` | string | Markdown body, maximum 200,000 characters. |
+| `status` | `draft` or `published` | Visibility state. |
+| `createdAt` | ISO 8601 string | Creation time. |
+| `updatedAt` | ISO 8601 string | Last persistence update. |
+| `publishedAt` | ISO 8601 string or null | First publication time. |
+
+`POST` accepts `title`, optional `bodyMd`, and optional `status`. `PUT` accepts any subset of those fields. Validation failures use HTTP 400 with code `VALIDATION_FAILED`.
+
+# Publication behavior
+
+* Creating with `status: "published"` sets `publishedAt`; omitted status creates a draft.
+* Publishing a never-published draft sets `publishedAt` once.
+* Editing a published post does not change `publishedAt`.
+* Moving a post back to draft preserves `publishedAt`; republishing retains the original timestamp.
+* Only rows currently marked `published` are returned by the public endpoint.
+
+# Wiring
+
+`BlogModule` registers `BlogController`/`BlogService` for the public list and `AdminBlogController`/`AdminBlogService` for management. Both services access `BlogPostEntity` through `TypeOrmModule.forFeature([BlogPostEntity])`. The Angular `BlogApiService` calls these routes for the admin page, authenticated Blog page, and landing-page post list.
+
+# See also
+
+- [Blog Publishing and Reading](/guides/blog.md)
+- [Blog Post Table](/database/blog-posts.md)
+- [REST API Overview](/api/rest-overview.md)

docs/api/rest-overview.md

@@ -3,7 +3,7 @@ type: api
 title: REST API Overview
 description: Base URL, versioning, auth, CSRF, and the standard error envelope.
 tags: [api, rest, overview, csrf]
-timestamp: 2026-07-23T00:10:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # Base URL & versioning
@@ -99,3 +99,4 @@ statuses and the canonical messages produced by
 - [System Endpoints](/api/system.md)
 - [Uploads Endpoints](/api/uploads.md)
 - [Challenges Endpoints](/api/challenges.md)
+- [Blog Endpoints](/api/blog.md)

docs/architecture/backend-modules.md

@@ -3,7 +3,7 @@ type: architecture
 title: Backend Module Map
 description: NestJS modules, controllers, services, and how they are wired together.
 tags: [architecture, backend, nestjs, modules]
-timestamp: 2026-07-23T00:10:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # Module Map
@@ -29,7 +29,7 @@ also registers two global providers:
 | `SystemModule`   | `backend/src/modules/system/system.module.ts` | `SystemController` (`/api/v1/bootstrap`, `/event/status`, SSE streams) + `SystemService`.       |
 | `AdminModule`    | `backend/src/modules/admin/admin.module.ts`   | Four controllers (`AdminController` for `/api/v1/admin/users*`, `AdminGeneralController` for `/api/v1/admin/general/*`, `AdminCategoriesController` for `/api/v1/admin/categories*`, `AdminChallengesController` for `/api/v1/admin/challenges*`) plus their services (`AdminService`, `AdminGeneralService`, `AdminCategoriesService`, `AdminChallengesService`, `ChallengeFilesService`). Gated by `AdminGuard` + `@Roles('admin')`. Imports `TypeOrmModule.forFeature([UserEntity, CategoryEntity, ChallengeEntity, ChallengeFileEntity, SolveEntity])`, `AuthModule`, `UsersModule`, `SettingsModule`, and `CommonModule` (for `SseHubService`, `ThemeLoaderService`). |
 | `UploadsModule`  | `backend/src/modules/uploads/uploads.module.ts` | `UploadsController` (`/api/v1/uploads/*`). Admin-only multipart.                            |
-| `BlogModule`     | `backend/src/modules/blog/blog.module.ts`     | `BlogController` (`GET /api/v1/blog/posts`) + `BlogService` (lists `status='published'` rows). |
+| `BlogModule`     | `backend/src/modules/blog/blog.module.ts`     | `BlogController`/`BlogService` expose published posts at `GET /api/v1/blog/posts`; `AdminBlogController`/`AdminBlogService` provide guarded CRUD at `/api/v1/admin/blog/posts` using `BlogPostEntity`. |
 | `ChallengesModule` | `backend/src/modules/challenges/challenges.module.ts` | `ChallengesController` (`/api/v1/challenges/{board,status,:id,:id/solves}`) + `ChallengesEventsController` (authenticated SSE `/api/v1/events`) + `ChallengesService` (board, detail, submit, scoring util). |
 | `FrontendModule` | `backend/src/frontend/frontend.module.ts`     | Registers `SpaFallbackMiddleware` and the uploads static helper.                              |
 
@@ -47,6 +47,7 @@ also registers two global providers:
 | `SystemController`     | `/api/v1`               | Mixed (bootstrap/event/scoreboard/settings are public; `events/status` SSE is JWT-protected) | `backend/src/modules/system/system.controller.ts` |
 | `UploadsController`    | `/api/v1/uploads`       | Admin only   | `backend/src/modules/uploads/uploads.controller.ts`          |
 | `BlogController`       | `/api/v1/blog`          | Public       | `backend/src/modules/blog/blog.controller.ts`               |
+| `AdminBlogController`  | `/api/v1/admin/blog/posts` | Admin only | `backend/src/modules/blog/admin-blog.controller.ts` |
 | `ChallengesController` | `/api/v1/challenges`    | Authenticated | `backend/src/modules/challenges/challenges.controller.ts` |
 | `ChallengesEventsController` | `/api/v1/events` | Authenticated (SSE) | `backend/src/modules/challenges/events.controller.ts` |
 
@@ -89,3 +90,4 @@ also registers two global providers:
 - [System Overview](/architecture/overview.md)
 - [Key Files Index](/architecture/key-files.md)
 - [REST API Overview](/api/rest-overview.md)
+- [Blog API](/api/blog.md)

docs/architecture/frontend-structure.md

@@ -1,9 +1,9 @@
 ---
 type: architecture
 title: Frontend Structure
-description: Angular routes, components, services, guards, interceptors, and authenticated SSE transport.
+description: Angular routes, components, services, guards, interceptors, authenticated SSE transport, and blog management and presentation wiring.
-tags: [architecture, frontend, angular, shell, sse, challenges, scoreboard, notifications]
+tags: [architecture, frontend, angular, shell, sse, challenges, scoreboard, notifications, blog]
-timestamp: 2026-07-23T05:10:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # Routes
@@ -17,9 +17,10 @@ Routes live in `frontend/src/app/app.routes.ts`:
 | `/` | `HomeComponent` | `authGuard` | Authenticated shell and child outlet. |
 | `/challenges` | `ChallengesPage` | inherited | Full challenges board (category columns, modal, flag submit, live SSE). |
 | `/scoreboard` | `ScoreboardPage` | inherited | Live scoreboard page with 4 tabs (Ranking / Matrix / Event Log / Score Graph), live SSE `solve` updates. |
-| `/blog` | `BlogPage` | inherited | Placeholder blog page. |
+| `/blog` | `BlogPage` | inherited | Loads and renders published posts with loading, error, and empty states. |
-| `/admin` | `AdminUsersComponent` | `adminGuard` | Admin-only child route. |
+| `/admin` | `AdminShellComponent` | `adminGuard` | Admin-only layout; redirects to `/admin/general`. |
 | `/admin/challenges` | `AdminChallengesComponent` | inherited | Sortable/searchable admin Challenges list, Add/Edit modal, import/export. |
+| `/admin/blog` | `AdminBlogComponent` | inherited | Admin post table and create/edit/draft/publish/delete workflow. |
 
 # Components and services
 
@@ -45,6 +46,11 @@ Routes live in `frontend/src/app/app.routes.ts`:
 | `RankingComponent` / `MatrixComponent` / `EventLogComponent` / `ScoreGraphComponent` | `frontend/src/app/features/scoreboard/` | Presentational components for the 4 tabs; each binds a single `@Input()` from `ScoreboardStore` and uses `PLAYER_COLOR_PALETTE` + `stablePlayerColorIndex` to color each player consistently. |
 | `NotificationService` | `frontend/src/app/core/services/notification.service.ts` | Root-provided signal-backed store of `{ id, kind, message, ts }` records; `error()` / `info()` push, `dismiss(id)` / `clear()` remove. |
 | `errorNotificationInterceptor` | `frontend/src/app/core/interceptors/error-notification.interceptor.ts` | Functional HTTP interceptor that pushes a friendly message into `NotificationService` for every `HttpErrorResponse`; suppresses duplicate toasts for endpoints with their own error UI (login form, `/challenges/status` snapshot). |
+| `BlogApiService` | `frontend/src/app/core/services/blog.service.ts` | Promise-based HTTP client for the published list and admin CRUD routes. |
+| `BlogPage` | `frontend/src/app/features/blog/blog.page.ts` | Smart `/blog` page that loads published posts and derives loading, error, empty, and list states. |
+| `BlogPresenterComponent` | `frontend/src/app/features/blog/blog-presenter.component.ts` | Shared title/date/sanitized-Markdown renderer used by `/blog` and `/login`. |
+| `AdminBlogComponent` | `frontend/src/app/features/admin/blog/blog.component.ts` | Smart `/admin/blog` page coordinating list refresh and create/edit/delete modal state. |
+| `BlogFormModalComponent` / `BlogDeleteModalComponent` | `frontend/src/app/features/admin/blog/` | Admin Markdown editor with live preview and destructive-action confirmation. |
 
 # Authenticated SSE wiring
 
@@ -81,6 +87,9 @@ on destruction.
 | `frontend/src/app/core/services/event-status.pure.ts` | Defines the event payload and transport interface. |
 | `frontend/src/app/features/challenges/challenges.page.ts` | `/challenges` smart page; owns gate logic, modal lifecycle, SSE wiring, and the countdown-zero reload. |
 | `frontend/src/app/features/challenges/challenges.store.ts` | Signal store backing `/challenges`: board, event state, per-card solve listeners, SSE solve-frame mutation, submit response application, public `reset()`, and per-user `setMyUserId` flush. |
+| `frontend/src/app/core/services/blog.service.ts` | Calls public and admin blog endpoints with typed payloads. |
+| `frontend/src/app/features/blog/blog-presenter.component.ts` | Shared sanitized Markdown post rendering for authenticated and landing views. |
+| `frontend/src/app/features/admin/blog/blog.component.ts` | Coordinates administrator blog CRUD UI and table refreshes. |
 | `tests/frontend/authenticated-event-source.spec.ts` | Regression coverage for authenticated SSE transport behavior. |
 
 # Event-status pure helpers
@@ -129,4 +138,5 @@ for the full contract and tester matrix.
 - [Challenges Board](/guides/challenges-board.md)
 - [Scoreboard Page](/guides/scoreboard-page.md)
 - [Notifications](/guides/notifications.md)
+- [Blog Publishing and Reading](/guides/blog.md)
 - [System Overview](/architecture/overview.md)

docs/architecture/key-files.md

@@ -1,9 +1,9 @@
 ---
 type: architecture
 title: Key Files Index
-description: One-line responsibility for important source and contract-test files, including strict event-window validation, the public bootstrap SSE listener, the challenges full-replace import flow, the authenticated player-facing challenges board, and the per-user `solvedByMe` reset on the session boundary.
+description: One-line responsibility for important source and contract-test files, including event-window, challenge, scoreboard, session, notification, and blog flows.
-tags: [architecture, key-files, event-window, validation, default-challenge-ip, sse, bootstrap, migrations, challenges, import, board, notifications, per-user, session]
+tags: [architecture, key-files, event-window, validation, default-challenge-ip, sse, bootstrap, migrations, challenges, import, board, notifications, per-user, session, blog]
-timestamp: 2026-07-23T04:05:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # Backend
@@ -41,6 +41,11 @@ timestamp: 2026-07-23T04:05:00Z
 | `backend/src/modules/challenges/dto/challenges.dto.ts` | zod contracts (`SolveSubmitBodySchema`, `BoardQuerySchema`, `ChallengeIdParamSchema`) + DTO types for the player-facing board. |
 | `backend/src/modules/challenges/scoring.util.ts` | Pure `computeLivePoints`, `rankBonusForPosition`, `compareDifficulty`, `computeAwardedPoints` (base + rank bonus), `PLAYER_COLOR_PALETTE` + `stablePlayerColorIndex` (FNV-1a → palette index), and constant-time `safeEqualString` for flag comparison. |
 | `backend/src/common/errors/error-codes.ts` | Canonical error code map (now includes `EVENT_NOT_RUNNING`, `FLAG_INCORRECT`, `CHALLENGE_DISABLED`). |
+| `backend/src/modules/blog/blog.module.ts` | Wires the public and admin blog controllers/services to `BlogPostEntity`. |
+| `backend/src/modules/blog/admin-blog.controller.ts` | Registers administrator CRUD routes at `/api/v1/admin/blog/posts`. |
+| `backend/src/modules/blog/admin-blog.service.ts` | Lists, creates, updates, publishes/drafts, and deletes posts while preserving first-publication time. |
+| `backend/src/modules/blog/dto/blog.dto.ts` | Public/admin response contracts and zod validation for title, body, status, and post id. |
+| `tests/backend/blog-admin.spec.ts` | Admin authorization, CRUD, validation, publication-timestamp, deletion, and public draft-hiding contracts. |
 
 # Frontend
 
@@ -94,6 +99,16 @@ timestamp: 2026-07-23T04:05:00Z
 | `frontend/src/app/features/scoreboard/scoreboard.page.ts` | `/scoreboard` smart page (also listed above): gates the four tabs, wires `store.loadAll()` and `store.wireSse(...)` on init, and tears them down via `store.stop()` on destroy. |
 | `frontend/src/app/core/services/notification.service.ts` | Root-provided signal-backed store of `{ id, kind, message, ts }` records; `error()` / `info()` push, `dismiss(id)` / `clear()` remove. |
 | `frontend/src/app/core/interceptors/error-notification.interceptor.ts` | Translates `HttpErrorResponse` into friendly messages and pushes them to `NotificationService` (with suppression for `/api/v1/auth/{login,csrf,register}` and `/api/v1/challenges/status`). |
+| `frontend/src/app/core/services/blog.service.ts` | Typed Promise-based public blog list and admin CRUD HTTP client. |
+| `frontend/src/app/features/blog/blog.page.ts` | `/blog` smart page with loading, error, empty, and published-list states. |
+| `frontend/src/app/features/blog/blog-presenter.component.ts` | Shared sanitized Markdown post renderer used by the Blog and landing pages. |
+| `frontend/src/app/features/blog/blog.pure.ts` | Pure blog-list state derivation. |
+| `frontend/src/app/features/admin/blog/blog.component.ts` | `/admin/blog` post table and create/edit/delete workflow coordinator. |
+| `frontend/src/app/features/admin/blog/blog-form-modal.component.ts` | Reactive title/Markdown editor with live preview and draft/publish actions. |
+| `frontend/src/app/features/admin/blog/blog-delete-modal.component.ts` | Post deletion confirmation and inline failure UI. |
+| `frontend/src/app/features/admin/blog/blog-form.pure.ts` | Admin form validation, form synchronization, request cleanup, and status display helpers. |
+| `tests/frontend/blog-page.spec.ts` | Blog page-state and shared sanitized Markdown rendering contracts. |
+| `tests/frontend/blog-admin-form.spec.ts` | Admin form validation, prefill/reset, payload, and status-label contracts. |
 | `tests/frontend/challenges.pure.spec.ts` | Pure helpers: sorting, parsers, friendly error mapping, `formatDdHhMm` (`DD:HH:mm:ss`). |
 | `tests/frontend/challenges.service.spec.ts` | HTTP-service contract: `getDetail` URL-encodes the id, attaches `?include=solvers`, and forwards `withCredentials: true`. |
 | `tests/frontend/challenges.store.spec.ts` | Signal store: board mutation, live solve merge, listeners, `stop()`. The "marks solvedByMe" and "does not double-count" tests now call `setMyUserId('me-1')` *before* `load()` to exercise the realistic page-mount sequence. |
@@ -118,3 +133,5 @@ timestamp: 2026-07-23T04:05:00Z
 - [Scoreboard Page Guide](/guides/scoreboard-page.md)
 - [Challenges Board](/guides/challenges-board.md)
 - [Notifications](/guides/notifications.md)
+- [Blog Publishing and Reading](/guides/blog.md)
+- [Blog API](/api/blog.md)

docs/database/blog-posts.md

@@ -3,7 +3,7 @@ type: database
 title: Blog Post Table
 description: blog_post table — draft/published Markdown posts surfaced on the public landing page.
 tags: [database, blog, markdown]
-timestamp: 2026-07-21T18:28:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # Schema
@@ -27,12 +27,18 @@ timestamp: 2026-07-21T18:28:00Z
 # Behavior
 
 * Only rows with `status = 'published'` are exposed through the public
-  endpoint `GET /api/v1/blog/posts` (see
+  endpoint `GET /api/v1/blog/posts` (see [Blog API](/api/blog.md)). Drafts
-  [REST API Overview](/api/rest-overview.md)). Drafts are hidden.
+  are hidden from the landing page and authenticated `/blog` page.
+* The admin CRUD endpoints under `/api/v1/admin/blog/posts` expose both
+  statuses and all timestamps to administrators.
+* First publication sets `published_at`. Later edits, demotion to draft,
+  and republication preserve that original timestamp.
 * `BlogService.listPublished()` orders by `published_at DESC`, falling
   back to `created_at` when `published_at` is null.
 
 # See also
 
 - [Database Schema Overview](/database/schema.md)
+- [Blog API](/api/blog.md)
+- [Blog Publishing and Reading](/guides/blog.md)
 - [Landing Page Guide](/guides/landing-page.md)

docs/guides/admin-shell.md

@@ -1,9 +1,9 @@
 ---
 type: guide
 title: Admin Shell & Side Navigation
-description: How an authenticated admin navigates the post-login admin area, the side-nav layout, and how the General and Categories pages are reached.
+description: How an authenticated admin navigates the post-login admin area, including General, Challenges, Players, Categories, and Blog management pages.
 tags: [guide, admin, shell, navigation, tester]
-timestamp: 2026-07-22T12:00:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # When this view is available
@@ -47,9 +47,9 @@ The side-nav is defined as a static `ENTRIES` array in
 |-------------|-----------------------|---------|----------------------------------------------------------------------------------------------|
 | General     | `/admin/general`      | yes     | [Admin — General Settings](/guides/admin-general-settings.md) (default — `/admin` redirects here). |
 | Challenges  | `/admin/challenges`   | yes     | [Admin — Challenges](/guides/admin-challenges.md) — sortable list, search, Add/Edit modal, file staging, import/export. |
-| Players     | `/admin/players`      | no      | Greyed-out placeholder. No route registered.                                                |
+| Players     | `/admin/players`      | yes     | User management page. |
-| Blog        | `/admin/blog`         | no      | Greyed-out placeholder. No route registered.                                                |
+| Blog        | `/admin/blog`         | yes     | [Blog Publishing and Reading](/guides/blog.md) — post list with draft/publish, edit, preview, and delete workflows. |
-| System      | `/admin/system`       | no      | Greyed-out placeholder. No route registered.                                                |
+| System      | `/admin/system`       | no      | Greyed-out placeholder. No route registered. |
 
 Each `<li>` carries `data-testid="admin-nav-{id}"`. Disabled entries
 have `cursor: not-allowed` and `opacity: 0.45`. Clicking a disabled
@@ -95,17 +95,18 @@ current URL starts with the entry's path. General is the default child
 | 4    | `frontend/src/app/features/admin/admin-shell.component.ts`  | Renders the aside + body; `ENTRIES` is the static side-nav list.                                   |
 | 5    | `frontend/src/app/features/admin/general.component.ts`       | `AdminGeneralComponent` (default `/admin/general`); embeds `AdminCategoriesComponent`.             |
 | 6    | `frontend/src/app/features/admin/categories/categories.component.ts` | `AdminCategoriesComponent` (`/admin/categories`); also rendered inside the General page.    |
-| 7    | `frontend/src/app/features/home/home.shell.ts`               | `shouldShowAdminNav({isAuthenticated, role})` predicate (exported and unit-tested).                 |
+| 7    | `frontend/src/app/features/admin/blog/blog.component.ts` | `AdminBlogComponent` (`/admin/blog`); coordinates post listing, editing, publication, and deletion. |
-| 8    | `frontend/src/app/features/home/home.component.ts`           | Shell template renders header, conditional nav (`*ngIf="showAdminNav()"`), and `<router-outlet>`.   |
+| 8    | `frontend/src/app/features/home/home.shell.ts`               | `shouldShowAdminNav({isAuthenticated, role})` predicate (exported and unit-tested).                 |
-| 9    | `frontend/src/app/core/services/admin.service.ts`           | Typed wrappers for `/api/v1/admin/users`, `/admin/general/*`, `/admin/categories/*`, `/uploads/{logo,category-icon}`. |
+| 9    | `frontend/src/app/features/home/home.component.ts`           | Shell template renders header, conditional nav (`*ngIf="showAdminNav()"`), and `<router-outlet>`.   |
-| 10   | `backend/src/modules/admin/admin.module.ts`                 | Registers `AdminController`, `AdminGeneralController`, `AdminCategoriesController` + their services. Imports `AuthModule`, `UsersModule`, `SettingsModule`, `CommonModule`, and `TypeOrmModule.forFeature([UserEntity, CategoryEntity, ChallengeEntity])`. |
+| 10   | `frontend/src/app/core/services/blog.service.ts` | Typed wrappers for public blog listing and `/api/v1/admin/blog/posts` CRUD. |
+| 11   | `backend/src/modules/blog/blog.module.ts` | Registers public and admin blog controllers/services with the blog repository. |
 
 # Notes
 
 * The shell deliberately keeps `AdminShellComponent` as a thin layout
-  owner — child routes (`general`, `categories`) render into its
+  owner — enabled child routes render into its `<router-outlet>`. New admin
-  `<router-outlet>`. New admin sub-pages can be added by enabling
+  sub-pages require both an enabled `ENTRIES` item and a child route in
-  entries in `ENTRIES` and registering a child route in `app.routes.ts`.
+  `app.routes.ts`.
 * The guard decision function (`decideAdminGuard`) is a pure module so
   it is straightforward to unit-test without Angular DI. See
   `tests/frontend/admin-shell.spec.ts` and
@@ -124,5 +125,6 @@ current URL starts with the entry's path. General is the default child
 - [Change Password](/guides/change-password.md)
 - [Admin — General Settings](/guides/admin-general-settings.md)
 - [Admin — Categories](/guides/admin-categories.md)
+- [Blog Publishing and Reading](/guides/blog.md)
 - [REST API Overview](/api/rest-overview.md)
 - [Admin Endpoints](/api/admin.md)

docs/guides/blog.md

@@ -0,0 +1,71 @@
+---
+type: guide
+title: Blog Publishing and Reading
+description: How administrators create, edit, publish, and delete Markdown posts and how users read published posts.
+tags: [guide, blog, admin, markdown, tester]
+timestamp: 2026-07-23T10:12:24Z
+---
+
+# User views
+
+Published posts are available in two places:
+
+| View | Access | Expected content |
+|---|---|---|
+| `/login` | Unauthenticated users | The landing-page blog section lists published posts below the Login button. |
+| `/blog` | Signed-in users | The Blog page loads and lists all published posts. |
+
+Both views use `BlogPresenterComponent` to show the post title, publication date, and sanitized Markdown body. Draft posts never appear in either public list. The `/blog` page shows `Loading blog posts…` while loading, `No announcements yet.` when no posts are published, and an error message if loading fails.
+
+# Admin workflow
+
+1. Sign in as an administrator.
+2. Open **Admin**, then select **Blog**, or navigate directly to `/admin/blog`.
+3. Confirm the page displays a table with **Title**, **Status**, **Created**, **Updated**, **Published**, and **Actions** columns. If no posts exist, it displays `No posts yet.`.
+4. Click **+ New post**.
+5. Enter a required title and an optional Markdown body. The live preview updates beside the editor.
+6. Click **Save draft** to keep the post hidden from users, or **Publish** to expose it in `/blog` and on `/login`.
+7. Confirm a success banner displays `Draft saved.` or `Post published.`, and the refreshed table contains the post with the correct status badge.
+
+# Editing and deleting
+
+* Click the pencil action on a row to open the prefilled **Edit post** modal. It shows created, updated, and publication timestamps where available.
+* Saving as draft changes the status to **Draft** and hides the post from public lists. Republishing preserves the post's original publication timestamp.
+* Click the trash action to open **Delete post**. The confirmation includes the title and warns that deletion cannot be undone.
+* Click **Delete** to remove the post. The table refreshes and displays `Post deleted.`. Click **Cancel** or the modal backdrop to leave the post unchanged.
+
+# Validation and expected errors
+
+| Input or operation | Expected behavior |
+|---|---|
+| Empty or whitespace-only title | `Title is required`; save and publish remain unavailable. |
+| Title over 200 characters | `Title must be at most 200 characters`. |
+| Markdown body over 200,000 characters | `Body must be at most 200000 characters`. |
+| API list failure | An error banner replaces the table state. |
+| Create or update failure | The form stays open and displays the server message. |
+| Delete failure | The confirmation stays open and displays the server message. |
+
+# Architecture map
+
+| Layer | File | Responsibility |
+|---|---|---|
+| Routes | `frontend/src/app/app.routes.ts` | Registers authenticated `/blog` and admin-only `/admin/blog`. |
+| Admin page | `frontend/src/app/features/admin/blog/blog.component.ts` | Loads all posts and coordinates create, edit, publish, draft, and delete operations. |
+| Admin form | `frontend/src/app/features/admin/blog/blog-form-modal.component.ts` | Reactive title/body editor with sanitized live Markdown preview. |
+| Admin form logic | `frontend/src/app/features/admin/blog/blog-form.pure.ts` | Validation, form synchronization, request cleanup, and status labels. |
+| Delete confirmation | `frontend/src/app/features/admin/blog/blog-delete-modal.component.ts` | Confirms destructive deletion and displays failures. |
+| User page | `frontend/src/app/features/blog/blog.page.ts` | Loads published posts and selects loading, error, empty, or list state. |
+| Shared presenter | `frontend/src/app/features/blog/blog-presenter.component.ts` | Renders a published post consistently on `/blog` and `/login`. |
+| HTTP client | `frontend/src/app/core/services/blog.service.ts` | Calls public list and admin CRUD endpoints. |
+| Backend wiring | `backend/src/modules/blog/blog.module.ts` | Registers public and admin controllers and services with the blog repository. |
+| Admin API | `backend/src/modules/blog/admin-blog.controller.ts` | Registers guarded CRUD routes under `/api/v1/admin/blog/posts`. |
+| Persistence logic | `backend/src/modules/blog/admin-blog.service.ts` | Queries and mutates `blog_post` rows and controls publication timestamps. |
+
+The Angular client uses HTTP JSON calls. Existing auth and CSRF interceptors attach the administrator JWT and CSRF token to unsafe requests. The backend controller is protected by `AdminGuard` and `@Roles('admin')`, then delegates to `AdminBlogService`, which uses the TypeORM `BlogPostEntity` repository.
+
+# See also
+
+- [Blog API](/api/blog.md)
+- [Blog Post Table](/database/blog-posts.md)
+- [Landing Page](/guides/landing-page.md)
+- [Admin Shell & Side Navigation](/guides/admin-shell.md)

docs/guides/landing-page.md

@@ -3,7 +3,7 @@ type: guide
 title: Landing Page
 description: How the public landing page renders, how the login + registration modal is opened, what each form does, and how the modal stays in sync with admin `registrationsEnabled` changes via SSE.
 tags: [guide, landing, login, register, ui, sse, bootstrap]
-timestamp: 2026-07-22T16:15:00Z
+timestamp: 2026-07-23T10:12:24Z
 ---
 
 # What you see
@@ -31,6 +31,8 @@ On a fresh visit the page shows, in order:
 5. **Blog list** — `<section data-testid="landing-blog">` listing every
    row returned by `GET /api/v1/blog/posts` (only `status='published'`
    rows), or the text `No announcements yet.` when the list is empty.
+   Each row is rendered by the shared `BlogPresenterComponent` with its
+   title, publication date, and sanitized Markdown body, matching `/blog`.
 
 # Guard
 
@@ -144,4 +146,5 @@ response to the unsafe call itself.
 - [Auth Endpoints](/api/auth.md)
 - [Database Schema Overview](/database/schema.md) (`blog_post`)
 - [Frontend Structure](/architecture/frontend-structure.md)
+- [Blog Publishing and Reading](/guides/blog.md)
 - [First-Run Bootstrap](/guides/bootstrap.md)

docs/index.md

@@ -8,10 +8,11 @@ HIPCTF is a single-tenant CTF (Capture-The-Flag) platform built as a Node.js
 monorepo containing a NestJS REST API and an Angular single-page application.
 It supports user registration, authentication, challenge management, a live
 scoreboard, an event window with a public countdown, theming, and admin
-controls.
+controls, administrator-managed Markdown blog publishing, and public and
+signed-in blog views.
 
 The docs below are organized by purpose so agents can pull just the slice
-they need. Last regenerated 2026-07-23T08:42:24Z.
+they need. Last regenerated 2026-07-23T10:12:24Z.
 
 # Architecture
 
@@ -61,6 +62,7 @@ they need. Last regenerated 2026-07-23T08:42:24Z.
   streams, public event-window settings, and the authenticated
   `/events/status` SSE stream.
 * [Uploads Endpoints](/api/uploads.md) - Admin-only multipart uploads for category icons, challenge files, and validated site logos.
+* [Blog Endpoints](/api/blog.md) - Public published-post listing and admin-only post CRUD, validation, and publication behavior.
 
 # Guides
 
@@ -70,8 +72,9 @@ they need. Last regenerated 2026-07-23T08:42:24Z.
   helpers that translate reactive-form state into the inline validation
   messages on the first-admin modal.
 * [Admin Shell & Side Navigation](/guides/admin-shell.md) - How admins
-  navigate the post-login admin area side-nav (General, Challenges,
+  navigate the post-login admin area side-nav and reach General,
-  Players, Blog, System) and reach the enabled child pages.
+  Challenges, Players, and Blog pages.
+* [Blog Publishing and Reading](/guides/blog.md) - How administrators create, preview, draft, publish, edit, and delete Markdown posts and how users read them.
 * [Admin — General Settings](/guides/admin-general-settings.md) - How an
   admin edits platform-wide settings, including the required and strictly
   ordered event window, at `/admin/general`.

frontend/src/app/app.routes.ts

@@ -64,6 +64,11 @@ export const APP_ROUTES: Routes = [
             loadComponent: () =>
               import('./features/admin/admin-users.component').then((m) => m.AdminUsersComponent),
           },
+          {
+            path: 'blog',
+            loadComponent: () =>
+              import('./features/admin/blog/blog.component').then((m) => m.AdminBlogComponent),
+          },
         ],
       },
     ],

frontend/src/app/core/services/blog.service.ts

@@ -0,0 +1,74 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { firstValueFrom } from 'rxjs';
+
+export type BlogStatus = 'draft' | 'published';
+
+export interface AdminBlogPost {
+  id: string;
+  title: string;
+  bodyMd: string;
+  status: BlogStatus;
+  createdAt: string;
+  updatedAt: string;
+  publishedAt: string | null;
+}
+
+export interface CreatePostBody {
+  title: string;
+  bodyMd: string;
+  status?: BlogStatus;
+}
+
+export interface UpdatePostBody {
+  title?: string;
+  bodyMd?: string;
+  status?: BlogStatus;
+}
+
+export interface PublicBlogPost {
+  id: string;
+  title: string;
+  publishedAt: string;
+  bodyMd: string;
+}
+
+@Injectable({ providedIn: 'root' })
+export class BlogApiService {
+  private readonly http = inject(HttpClient);
+
+  async listAllPosts(): Promise<AdminBlogPost[]> {
+    return firstValueFrom(
+      this.http.get<AdminBlogPost[]>('/api/v1/admin/blog/posts', { withCredentials: true }),
+    );
+  }
+
+  async createPost(body: CreatePostBody): Promise<AdminBlogPost> {
+    return firstValueFrom(
+      this.http.post<AdminBlogPost>('/api/v1/admin/blog/posts', body, { withCredentials: true }),
+    );
+  }
+
+  async updatePost(id: string, body: UpdatePostBody): Promise<AdminBlogPost> {
+    return firstValueFrom(
+      this.http.put<AdminBlogPost>(`/api/v1/admin/blog/posts/${encodeURIComponent(id)}`, body, {
+        withCredentials: true,
+      }),
+    );
+  }
+
+  async deletePost(id: string): Promise<void> {
+    await firstValueFrom(
+      this.http.delete<void>(`/api/v1/admin/blog/posts/${encodeURIComponent(id)}`, {
+        withCredentials: true,
+      }),
+    );
+  }
+
+  async listPublished(): Promise<PublicBlogPost[]> {
+    const res = await firstValueFrom(
+      this.http.get<{ posts: PublicBlogPost[] }>('/api/v1/blog/posts', { withCredentials: true }),
+    );
+    return res.posts ?? [];
+  }
+}

frontend/src/app/features/admin/admin-shell.component.ts

@@ -13,7 +13,7 @@ const ENTRIES: AdminNavEntry[] = [
   { id: 'general', label: 'General', path: '/admin/general', enabled: true },
   { id: 'challenges', label: 'Challenges', path: '/admin/challenges', enabled: true },
   { id: 'players', label: 'Players', path: '/admin/players', enabled: true },
-  { id: 'blog', label: 'Blog', path: '/admin/blog', enabled: false },
+  { id: 'blog', label: 'Blog', path: '/admin/blog', enabled: true },
   { id: 'system', label: 'System', path: '/admin/system', enabled: false },
 ];
 

frontend/src/app/features/admin/blog/blog-delete-modal.component.ts

@@ -0,0 +1,54 @@
+import { ChangeDetectionStrategy, Component, input, output } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { AdminBlogPost } from '../../../core/services/blog.service';
+
+@Component({
+  selector: 'app-blog-delete-modal',
+  standalone: true,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [CommonModule],
+  styles: [`
+    .modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.4); display: flex; align-items: center; justify-content: center; z-index: 50; }
+    .modal { background: var(--color-surface, #fff); padding: 16px; border-radius: var(--radius-md, 8px); min-width: 360px; max-width: 90vw; }
+    .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
+    .error { color: var(--color-danger, #f00); margin-top: 8px; }
+  `],
+  template: `
+    @if (open()) {
+      <div class="modal-backdrop" data-testid="post-delete-backdrop" (click)="onCancel()">
+        <div class="modal" (click)="$event.stopPropagation()" data-testid="post-delete-modal">
+          <h3>Delete post</h3>
+          @if (post(); as p) {
+            <p data-testid="post-delete-name">
+              Delete <b>{{ p.title }}</b>? This cannot be undone.
+            </p>
+          }
+          @if (errorMessage()) {
+            <p class="error" data-testid="post-delete-error">{{ errorMessage() }}</p>
+          }
+          <div class="actions">
+            <button type="button" (click)="onCancel()" data-testid="post-delete-cancel">Cancel</button>
+            <button type="button" [disabled]="deleting()" (click)="onConfirm()" data-testid="post-delete-ok">Delete</button>
+          </div>
+        </div>
+      </div>
+    }
+  `,
+})
+export class BlogDeleteModalComponent {
+  readonly open = input(false);
+  readonly post = input<AdminBlogPost | null>(null);
+  readonly errorMessage = input<string | null>(null);
+  readonly deleting = input(false);
+
+  readonly cancel = output<void>();
+  readonly confirm = output<void>();
+
+  onCancel(): void {
+    this.cancel.emit();
+  }
+
+  onConfirm(): void {
+    this.confirm.emit();
+  }
+}

frontend/src/app/features/admin/blog/blog-form-modal.component.ts

@@ -0,0 +1,223 @@
+import {
+  ChangeDetectionStrategy,
+  ChangeDetectorRef,
+  Component,
+  DestroyRef,
+  effect,
+  inject,
+  input,
+  output,
+  signal,
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormBuilder, ReactiveFormsModule } from '@angular/forms';
+import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
+import { MarkdownService } from '../../../core/services/markdown.service';
+import { AdminBlogPost } from '../../../core/services/blog.service';
+import {
+  PostFormGroup,
+  buildPostBody,
+  syncPostForm,
+  validatePostForm,
+} from './blog-form.pure';
+
+export type PostFormMode = 'create' | 'edit';
+
+export interface PostFormSubmitPayload {
+  mode: PostFormMode;
+  title: string;
+  bodyMd: string;
+  action: 'draft' | 'publish';
+}
+
+@Component({
+  selector: 'app-blog-form-modal',
+  standalone: true,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [CommonModule, ReactiveFormsModule],
+  styles: [`
+    .modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.4); display: flex; align-items: center; justify-content: center; z-index: 50; }
+    .modal { background: var(--color-surface, #fff); padding: 16px; border-radius: var(--radius-md, 8px); min-width: 480px; max-width: 90vw; max-height: 90vh; overflow: auto; }
+    .row { margin: 8px 0; display: flex; flex-direction: column; gap: 4px; }
+    .layout { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
+    .preview { border: 1px solid var(--color-secondary, #ccc); padding: 8px; border-radius: var(--radius-sm, 4px); background: var(--color-surface, #fafafa); min-height: 200px; max-height: 320px; overflow: auto; }
+    .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 12px; }
+    .field-error { color: var(--color-danger, #f00); font-size: 12px; }
+    .editing-meta { font-size: 12px; opacity: 0.7; }
+  `],
+  template: `
+    @if (open()) {
+      <div class="modal-backdrop" data-testid="post-form-backdrop" (click)="onCancel()">
+        <form
+          class="modal"
+          [formGroup]="form"
+          (click)="$event.stopPropagation()"
+          (submit)="$event.preventDefault()"
+          data-testid="post-form-modal"
+        >
+          <h3>{{ mode() === 'create' ? 'New post' : 'Edit post' }}</h3>
+
+          @if (post(); as p) {
+            @if (mode() === 'edit') {
+              <p class="editing-meta">
+                Created: {{ p.createdAt | date: 'medium' }} ·
+                Updated: {{ p.updatedAt | date: 'medium' }}
+                @if (p.publishedAt) {
+                  · Published: {{ p.publishedAt | date: 'medium' }}
+                }
+              </p>
+            }
+          }
+
+          <div class="row">
+            <label for="pf-title">Title (required)</label>
+            <input
+              id="pf-title"
+              type="text"
+              formControlName="title"
+              data-testid="pf-title"
+              [attr.aria-invalid]="titleError() ? 'true' : null"
+              [attr.aria-describedby]="titleError() ? 'pf-title-error' : null"
+            />
+            @if (titleError()) {
+              <span class="field-error" id="pf-title-error" data-testid="pf-title-error">{{ titleError() }}</span>
+            }
+          </div>
+
+          <div class="layout">
+            <div class="row">
+              <label for="pf-body">Markdown body</label>
+              <textarea
+                id="pf-body"
+                rows="14"
+                formControlName="bodyMd"
+                data-testid="pf-body"
+                (input)="onBodyInput()"
+              ></textarea>
+              @if (bodyError()) {
+                <span class="field-error" data-testid="pf-body-error">{{ bodyError() }}</span>
+              }
+            </div>
+            <div class="row">
+              <label>Live preview</label>
+              <div class="preview" data-testid="pf-preview" [innerHTML]="previewHtml()"></div>
+            </div>
+          </div>
+
+          @if (errorMessage()) {
+            <p class="field-error" data-testid="pf-error" style="margin-top: 8px;">{{ errorMessage() }}</p>
+          }
+
+          <div class="actions">
+            <button type="button" (click)="onCancel()" data-testid="pf-cancel">Cancel</button>
+            <button
+              type="button"
+              [disabled]="!canSaveDraft()"
+              (click)="onSubmit('draft')"
+              data-testid="pf-save-draft"
+            >Save draft</button>
+            <button
+              type="button"
+              [disabled]="!canPublish()"
+              (click)="onSubmit('publish')"
+              data-testid="pf-publish"
+            >Publish</button>
+          </div>
+        </form>
+      </div>
+    }
+  `,
+})
+export class BlogFormModalComponent {
+  private readonly fb = inject(FormBuilder);
+  private readonly markdown = inject(MarkdownService);
+  private readonly destroyRef = inject(DestroyRef);
+  private readonly cdr = inject(ChangeDetectorRef);
+
+  readonly open = input(false);
+  readonly mode = input<PostFormMode>('create');
+  readonly post = input<AdminBlogPost | null>(null);
+  readonly errorMessage = input<string | null>(null);
+  readonly saving = input(false);
+
+  readonly cancel = output<void>();
+  readonly submit = output<PostFormSubmitPayload>();
+
+  readonly previewHtml = signal<string>('');
+  readonly titleTouched = signal(false);
+  readonly bodyTouched = signal(false);
+
+  readonly form: PostFormGroup = this.fb.nonNullable.group({
+    title: this.fb.nonNullable.control(''),
+    bodyMd: this.fb.nonNullable.control(''),
+  });
+
+  constructor() {
+    effect(
+      () => {
+        syncPostForm(this.form, this.mode(), this.post());
+        this.titleTouched.set(false);
+        this.bodyTouched.set(false);
+        this.previewHtml.set(this.markdown.render(this.form.controls.bodyMd.value ?? ''));
+        this.cdr.markForCheck();
+      },
+      { allowSignalWrites: true },
+    );
+
+    this.form.controls.title.valueChanges
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe(() => {
+        this.titleTouched.set(true);
+      });
+    this.form.controls.bodyMd.valueChanges
+      .pipe(takeUntilDestroyed(this.destroyRef))
+      .subscribe((v) => {
+        this.bodyTouched.set(true);
+        this.previewHtml.set(this.markdown.render(v ?? ''));
+      });
+  }
+
+  onBodyInput(): void {
+    // valueChanges already triggers the preview; this is here as an explicit
+    // hook in case the template wiring changes.
+  }
+
+  titleError(): string | null {
+    const v = this.form.controls.title.value ?? '';
+    if (!this.titleTouched() && v.length === 0) return null;
+    const result = validatePostForm({ title: v, bodyMd: this.form.controls.bodyMd.value ?? '' });
+    return result.errors.title ?? null;
+  }
+
+  bodyError(): string | null {
+    const v = this.form.controls.bodyMd.value ?? '';
+    if (!this.bodyTouched() && v.length === 0) return null;
+    const result = validatePostForm({ title: this.form.controls.title.value ?? '', bodyMd: v });
+    return result.errors.bodyMd ?? null;
+  }
+
+  canSaveDraft(): boolean {
+    if (this.saving()) return false;
+    const v = this.form.getRawValue();
+    const result = validatePostForm({ title: v.title ?? '', bodyMd: v.bodyMd ?? '' });
+    return result.ok;
+  }
+
+  canPublish(): boolean {
+    return this.canSaveDraft();
+  }
+
+  onCancel(): void {
+    this.cancel.emit();
+  }
+
+  onSubmit(action: 'draft' | 'publish'): void {
+    this.titleTouched.set(true);
+    this.bodyTouched.set(true);
+    const raw = this.form.getRawValue();
+    const result = validatePostForm({ title: raw.title ?? '', bodyMd: raw.bodyMd ?? '' });
+    if (!result.ok) return;
+    const cleaned = buildPostBody({ title: raw.title ?? '', bodyMd: raw.bodyMd ?? '' });
+    this.submit.emit({ mode: this.mode(), ...cleaned, action });
+  }
+}

frontend/src/app/features/admin/blog/blog-form.pure.ts

@@ -0,0 +1,58 @@
+import { FormControl, FormGroup } from '@angular/forms';
+import { AdminBlogPost, BlogStatus } from '../../../core/services/blog.service';
+
+export type PostFormGroup = FormGroup<{
+  title: FormControl<string>;
+  bodyMd: FormControl<string>;
+}>;
+
+export const MAX_TITLE_LENGTH = 200;
+export const MAX_BODY_LENGTH = 200_000;
+
+export function validatePostForm(value: { title: string; bodyMd: string }): {
+  ok: boolean;
+  errors: { title?: string; bodyMd?: string };
+} {
+  const errors: { title?: string; bodyMd?: string } = {};
+  const title = (value.title ?? '').trim();
+  if (title.length === 0) errors.title = 'Title is required';
+  else if (title.length > MAX_TITLE_LENGTH) errors.title = `Title must be at most ${MAX_TITLE_LENGTH} characters`;
+
+  const body = value.bodyMd ?? '';
+  if (body.length > MAX_BODY_LENGTH) errors.bodyMd = `Body must be at most ${MAX_BODY_LENGTH} characters`;
+
+  return { ok: Object.keys(errors).length === 0, errors };
+}
+
+export function syncPostForm(
+  form: PostFormGroup,
+  mode: 'create' | 'edit',
+  post: AdminBlogPost | null,
+): void {
+  if (mode === 'edit' && post) {
+    form.controls.title.setValue(post.title ?? '', { emitEvent: false });
+    form.controls.bodyMd.setValue(post.bodyMd ?? '', { emitEvent: false });
+  } else {
+    form.controls.title.setValue('', { emitEvent: false });
+    form.controls.bodyMd.setValue('', { emitEvent: false });
+  }
+  form.controls.title.markAsUntouched();
+  form.controls.title.markAsPristine();
+  form.controls.bodyMd.markAsUntouched();
+  form.controls.bodyMd.markAsPristine();
+}
+
+export function buildPostBody(formValue: { title: string; bodyMd: string }): {
+  title: string;
+  bodyMd: string;
+} {
+  return { title: formValue.title.trim(), bodyMd: formValue.bodyMd ?? '' };
+}
+
+export function statusBadgeClass(status: BlogStatus): string {
+  return status === 'published' ? 'badge-published' : 'badge-draft';
+}
+
+export function statusLabel(status: BlogStatus): string {
+  return status === 'published' ? 'Published' : 'Draft';
+}

frontend/src/app/features/admin/blog/blog.component.ts

@@ -0,0 +1,253 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  OnInit,
+  inject,
+  signal,
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { BlogApiService, AdminBlogPost } from '../../../core/services/blog.service';
+import { BlogFormModalComponent, PostFormSubmitPayload } from './blog-form-modal.component';
+import { BlogDeleteModalComponent } from './blog-delete-modal.component';
+import { statusBadgeClass, statusLabel } from './blog-form.pure';
+
+type ModalMode = 'create' | 'edit' | null;
+
+@Component({
+  selector: 'app-admin-blog',
+  standalone: true,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [CommonModule, BlogFormModalComponent, BlogDeleteModalComponent],
+  styles: [`
+    .admin-blog { display: flex; flex-direction: column; gap: 12px; }
+    .toolbar { display: flex; justify-content: space-between; align-items: center; }
+    .toolbar h2 { margin: 0; }
+    .status-banner { padding: 8px; border-radius: var(--radius-sm, 4px); }
+    .status-banner.success { background: #ecfdf5; color: #065f46; }
+    .status-banner.error { background: #fee2e2; color: #991b1b; }
+    .table { width: 100%; border-collapse: collapse; }
+    .table th, .table td { padding: 8px; border-bottom: 1px solid var(--color-secondary, #ccc); text-align: left; vertical-align: top; }
+    .badge { padding: 2px 6px; border-radius: 4px; font-size: 12px; }
+    .badge-draft { background: var(--color-secondary, #ddd); color: #444; }
+    .badge-published { background: #d1fae5; color: #065f46; }
+    .row-actions button { margin-left: 4px; }
+    .empty { text-align: center; padding: 16px; opacity: 0.7; }
+    button[disabled] { opacity: 0.5; cursor: not-allowed; }
+  `],
+  template: `
+    <section class="admin-blog" data-testid="admin-blog">
+      <div class="toolbar">
+        <h2>Blog</h2>
+        <button type="button" (click)="openCreate()" [disabled]="actionInFlight()" data-testid="blog-add">
+          + New post
+        </button>
+      </div>
+
+      @if (statusMessage()) {
+        <p class="status-banner success" role="status" aria-live="polite" data-testid="blog-status">
+          {{ statusMessage() }}
+        </p>
+      }
+      @if (loadError()) {
+        <p class="status-banner error" role="alert" aria-live="assertive" data-testid="blog-error">
+          {{ loadError() }}
+        </p>
+      }
+
+      @if (loading()) {
+        <p data-testid="blog-loading">Loading posts…</p>
+      } @else if (posts().length === 0) {
+        <p class="empty" data-testid="blog-empty">No posts yet.</p>
+      } @else {
+        <table class="table" data-testid="blog-table">
+          <thead>
+            <tr>
+              <th>Title</th>
+              <th>Status</th>
+              <th>Created</th>
+              <th>Updated</th>
+              <th>Published</th>
+              <th>Actions</th>
+            </tr>
+          </thead>
+          <tbody>
+            @for (p of posts(); track p.id) {
+              <tr [attr.data-testid]="'blog-row-' + p.id">
+                <td>{{ p.title }}</td>
+                <td>
+                  <span class="badge" [class]="statusBadgeClass(p.status)" [attr.data-testid]="'blog-status-' + p.id">
+                    {{ statusLabel(p.status) }}
+                  </span>
+                </td>
+                <td>{{ p.createdAt | date: 'medium' }}</td>
+                <td>{{ p.updatedAt | date: 'medium' }}</td>
+                <td>
+                  @if (p.publishedAt) {
+                    {{ p.publishedAt | date: 'medium' }}
+                  } @else {
+                    —
+                  }
+                </td>
+                <td class="row-actions">
+                  <button type="button" (click)="openEdit(p)" [disabled]="actionInFlight()" [attr.data-testid]="'blog-edit-' + p.id">✎</button>
+                  <button type="button" (click)="openDelete(p)" [disabled]="actionInFlight()" [attr.data-testid]="'blog-delete-' + p.id">🗑</button>
+                </td>
+              </tr>
+            }
+          </tbody>
+        </table>
+      }
+
+      <app-blog-form-modal
+        [open]="modalMode() !== null"
+        [mode]="modalMode() === 'edit' ? 'edit' : 'create'"
+        [post]="editing()"
+        [errorMessage]="formError()"
+        [saving]="saving()"
+        (cancel)="closeModal()"
+        (submit)="onFormSubmit($event)"
+      />
+
+      <app-blog-delete-modal
+        [open]="deleteOpen()"
+        [post]="deleting()"
+        [errorMessage]="deleteError()"
+        [deleting]="deleting() !== null"
+        (cancel)="closeModal()"
+        (confirm)="onDeleteConfirm()"
+      />
+    </section>
+  `,
+})
+export class AdminBlogComponent implements OnInit {
+  private readonly blog = inject(BlogApiService);
+
+  readonly posts = signal<AdminBlogPost[]>([]);
+  readonly loading = signal(true);
+  readonly actionInFlight = signal(false);
+  readonly loadError = signal<string | null>(null);
+  readonly statusMessage = signal<string | null>(null);
+
+  readonly modalMode = signal<ModalMode>(null);
+  readonly editing = signal<AdminBlogPost | null>(null);
+  readonly deleting = signal<AdminBlogPost | null>(null);
+  readonly deleteOpen = signal(false);
+  readonly formError = signal<string | null>(null);
+  readonly deleteError = signal<string | null>(null);
+  readonly saving = signal(false);
+
+  readonly statusBadgeClass = statusBadgeClass;
+  readonly statusLabel = statusLabel;
+
+  async ngOnInit(): Promise<void> {
+    await this.load();
+  }
+
+  async load(): Promise<void> {
+    this.loading.set(true);
+    this.loadError.set(null);
+    try {
+      const list = await this.blog.listAllPosts();
+      this.posts.set(list);
+    } catch (e: any) {
+      this.loadError.set(e?.error?.message ?? e?.message ?? 'Failed to load posts');
+    } finally {
+      this.loading.set(false);
+    }
+  }
+
+  openCreate(): void {
+    this.editing.set(null);
+    this.deleting.set(null);
+    this.deleteOpen.set(false);
+    this.deleteError.set(null);
+    this.formError.set(null);
+    this.modalMode.set('create');
+    this.statusMessage.set(null);
+  }
+
+  openEdit(p: AdminBlogPost): void {
+    this.deleting.set(null);
+    this.deleteOpen.set(false);
+    this.editing.set(p);
+    this.deleteError.set(null);
+    this.formError.set(null);
+    this.modalMode.set('edit');
+    this.statusMessage.set(null);
+  }
+
+  openDelete(p: AdminBlogPost): void {
+    this.editing.set(null);
+    this.modalMode.set(null);
+    this.deleting.set(p);
+    this.deleteError.set(null);
+    this.deleteOpen.set(true);
+    this.statusMessage.set(null);
+  }
+
+  closeModal(): void {
+    this.modalMode.set(null);
+    this.deleteOpen.set(false);
+    this.editing.set(null);
+    this.deleting.set(null);
+    this.formError.set(null);
+    this.deleteError.set(null);
+    this.saving.set(false);
+  }
+
+  async onFormSubmit(payload: PostFormSubmitPayload): Promise<void> {
+    this.saving.set(true);
+    this.formError.set(null);
+    this.actionInFlight.set(true);
+    try {
+      const status = payload.action === 'publish' ? 'published' : 'draft';
+      if (payload.mode === 'create') {
+        const created = await this.blog.createPost({
+          title: payload.title,
+          bodyMd: payload.bodyMd,
+          status,
+        });
+        this.statusMessage.set(
+          status === 'published' ? 'Post published.' : 'Draft saved.',
+        );
+        this.closeModal();
+        await this.load();
+        // Highlight row briefly — no-op, but ensure we set posts above.
+        void created;
+      } else if (payload.mode === 'edit' && this.editing()) {
+        const id = this.editing()!.id;
+        await this.blog.updatePost(id, {
+          title: payload.title,
+          bodyMd: payload.bodyMd,
+          status,
+        });
+        this.statusMessage.set(
+          status === 'published' ? 'Post published.' : 'Draft saved.',
+        );
+        this.closeModal();
+        await this.load();
+      }
+    } catch (e: any) {
+      this.formError.set(e?.error?.message ?? e?.message ?? 'Failed to save');
+    } finally {
+      this.saving.set(false);
+      this.actionInFlight.set(false);
+    }
+  }
+
+  async onDeleteConfirm(): Promise<void> {
+    const p = this.deleting();
+    if (!p) return;
+    this.actionInFlight.set(true);
+    try {
+      await this.blog.deletePost(p.id);
+      this.statusMessage.set('Post deleted.');
+      this.closeModal();
+      await this.load();
+    } catch (e: any) {
+      this.deleteError.set(e?.error?.message ?? e?.message ?? 'Failed to delete');
+    } finally {
+      this.actionInFlight.set(false);
+    }
+  }
+}

frontend/src/app/features/blog/blog-presenter.component.ts

@@ -0,0 +1,40 @@
+import { ChangeDetectionStrategy, Component, input } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { MarkdownService } from '../../core/services/markdown.service';
+import { PublicBlogPost } from '../../core/services/blog.service';
+
+@Component({
+  selector: 'app-blog-presenter',
+  standalone: true,
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [CommonModule],
+  styles: [`
+    .blog-item { display: block; margin: 0 0 16px 0; }
+    .blog-title { margin: 0 0 4px 0; font-size: 18px; }
+    .blog-date { display: block; font-size: 12px; opacity: 0.7; margin-bottom: 8px; }
+    .blog-body { font-size: 14px; }
+  `],
+  template: `
+    <article class="blog-item" [attr.data-testid]="'blog-presenter-' + post().id">
+      <h2 class="blog-title" [attr.data-testid]="'blog-presenter-title-' + post().id">
+        {{ post().title }}
+      </h2>
+      <time class="blog-date" [attr.data-testid]="'blog-presenter-date-' + post().id">
+        {{ post().publishedAt | date: 'medium' }}
+      </time>
+      <div
+        class="blog-body"
+        [attr.data-testid]="'blog-presenter-body-' + post().id"
+        [innerHTML]="renderedHtml()"
+      ></div>
+    </article>
+  `,
+})
+export class BlogPresenterComponent {
+  readonly post = input.required<PublicBlogPost>();
+  private readonly markdown = new MarkdownService();
+
+  renderedHtml(): string {
+    return this.markdown.render(this.post()?.bodyMd ?? '');
+  }
+}

frontend/src/app/features/blog/blog.page.ts

@@ -1,14 +1,60 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { ChangeDetectionStrategy, Component, OnInit, computed, inject, signal } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { BlogApiService, PublicBlogPost } from '../../core/services/blog.service';
+import { BlogPresenterComponent } from './blog-presenter.component';
+import { deriveBlogListState } from './blog.pure';
 
 @Component({
   selector: 'app-blog-page',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [CommonModule, BlogPresenterComponent],
+  styles: [`
+    .blog-page { display: flex; flex-direction: column; gap: 12px; }
+    .blog-loading, .blog-error { padding: 8px; }
+    .blog-error { color: var(--color-danger, #f00); }
+    .blog-empty { opacity: 0.7; }
+    .blog-list { display: flex; flex-direction: column; }
+  `],
   template: `
-    <section class="page-blog">
+    <section class="blog-page" data-testid="blog-page">
       <h2>Blog</h2>
-      <p>Blog posts will appear here.</p>
+
+      @if (state().kind === 'loading') {
+        <p class="blog-loading" data-testid="blog-loading">Loading blog posts…</p>
+      } @else if (state().kind === 'error') {
+        <p class="blog-error" data-testid="blog-error">{{ state().message }}</p>
+      } @else if (state().kind === 'empty') {
+        <p class="blog-empty" data-testid="blog-empty">No announcements yet.</p>
+      } @else {
+        <div class="blog-list" data-testid="blog-list">
+          @for (post of posts(); track post.id) {
+            <app-blog-presenter [post]="post" />
+          }
+        </div>
+      }
     </section>
   `,
 })
-export class BlogPage {}
+export class BlogPage implements OnInit {
+  private readonly blog = inject(BlogApiService);
+
+  readonly posts = signal<PublicBlogPost[]>([]);
+  readonly loading = signal(true);
+  readonly error = signal<string | null>(null);
+
+  readonly state = computed(() =>
+    deriveBlogListState({ loading: this.loading(), error: this.error(), count: this.posts().length }),
+  );
+
+  async ngOnInit(): Promise<void> {
+    try {
+      const list = await this.blog.listPublished();
+      this.posts.set(list);
+    } catch (e: any) {
+      this.error.set(e?.error?.message ?? e?.message ?? 'Failed to load blog posts');
+    } finally {
+      this.loading.set(false);
+    }
+  }
+}

frontend/src/app/features/blog/blog.pure.ts

@@ -0,0 +1,17 @@
+export type BlogListKind = 'loading' | 'error' | 'empty' | 'list';
+
+export interface BlogListState {
+  kind: BlogListKind;
+  message?: string;
+}
+
+export function deriveBlogListState(input: {
+  loading: boolean;
+  error: string | null;
+  count: number;
+}): BlogListState {
+  if (input.loading) return { kind: 'loading' };
+  if (input.error) return { kind: 'error', message: input.error };
+  if (input.count === 0) return { kind: 'empty' };
+  return { kind: 'list' };
+}

frontend/src/app/features/landing/landing.component.css

@@ -64,6 +64,27 @@
   line-height: 1.5;
 }
 
+.landing-blog app-blog-presenter .blog-item {
+  border-top: 1px solid var(--color-surface, #eee);
+  padding-top: 1rem;
+}
+
+.landing-blog app-blog-presenter .blog-title {
+  margin: 0 0 0.25rem 0;
+  font-size: 1.25rem;
+}
+
+.landing-blog app-blog-presenter .blog-date {
+  display: block;
+  color: var(--color-text-muted, #888);
+  font-size: 0.85rem;
+  margin-bottom: 0.5rem;
+}
+
+.landing-blog app-blog-presenter .blog-body {
+  line-height: 1.5;
+}
+
 .landing-blog-empty {
   text-align: center;
   color: var(--color-text-muted, #888);

frontend/src/app/features/landing/landing.component.html

@@ -20,11 +20,7 @@
   @if (landing.posts().length > 0) {
     <section class="landing-blog" data-testid="landing-blog">
       @for (post of landing.posts(); track post.id) {
-        <article class="landing-blog-item">
+        <app-blog-presenter [post]="post" />
-          <h2 class="landing-blog-title">{{ post.title }}</h2>
-          <time class="landing-blog-date">{{ post.publishedAt | date: 'medium' }}</time>
-          <div class="landing-blog-body" [innerHTML]="markdown.render(post.bodyMd)"></div>
-        </article>
       }
     </section>
   } @else if (!landing.loading()) {

frontend/src/app/features/landing/landing.component.ts

@@ -16,6 +16,7 @@ import { MarkdownService } from '../../core/services/markdown.service';
 import { LandingService } from './landing.service';
 import { buildLoginFailureMessage } from './login-modal.service';
 import { passwordMatchValidator } from '../setup/setup-create-admin.validators';
+import { BlogPresenterComponent } from '../blog/blog-presenter.component';
 
 type ModalMode = 'closed' | 'login' | 'register';
 
@@ -23,7 +24,7 @@ type ModalMode = 'closed' | 'login' | 'register';
   selector: 'app-landing',
   standalone: true,
   changeDetection: ChangeDetectionStrategy.OnPush,
-  imports: [CommonModule, ReactiveFormsModule],
+  imports: [CommonModule, ReactiveFormsModule, BlogPresenterComponent],
   templateUrl: './landing.component.html',
   styleUrls: ['./landing.component.css'],
 })

tests/backend/blog-admin.spec.ts

@@ -0,0 +1,347 @@
+process.env.DATABASE_PATH = ':memory:';
+process.env.THEMES_DIR = './themes';
+process.env.FRONTEND_DIST = './frontend/dist';
+
+import { Test } from '@nestjs/testing';
+import { INestApplication, ValidationPipe } from '@nestjs/common';
+import { HttpAdapterHost } from '@nestjs/core';
+import cookieParser from 'cookie-parser';
+import * as express from 'express';
+import request from 'supertest';
+import { CookieAccessInfo } from 'cookiejar';
+import { AppModule } from '../../backend/src/app.module';
+import { GlobalExceptionFilter } from '../../backend/src/common/filters/global-exception.filter';
+import { CsrfMiddleware } from '../../backend/src/common/middleware/csrf.middleware';
+import { ConfigService } from '@nestjs/config';
+import { initDb } from './db-helper';
+import { BlogPostEntity } from '../../backend/src/database/entities/blog-post.entity';
+import { getRepositoryToken } from '@nestjs/typeorm';
+
+async function loginAs(app: INestApplication, username: string, password: string): Promise<{
+  agent: ReturnType<typeof request.agent>;
+  accessToken: string;
+  csrf: string;
+}> {
+  const agent = request.agent(app.getHttpServer());
+  await agent.get('/api/v1/auth/csrf');
+  const cookies: any = agent.jar.getCookies(CookieAccessInfo.All);
+  const csrf = cookies.find((c: any) => c.name === 'csrf')?.value;
+  const res = await agent
+    .post('/api/v1/auth/login')
+    .set('X-CSRF-Token', csrf)
+    .send({ username, password })
+    .expect(201);
+  return { agent, accessToken: res.body.accessToken as string, csrf };
+}
+
+async function createPlayer(
+  app: INestApplication,
+  adminToken: string,
+  adminCsrf: string,
+  username: string,
+  password: string,
+): Promise<{ agent: ReturnType<typeof request.agent>; accessToken: string; csrf: string }> {
+  const adminAgent = request.agent(app.getHttpServer());
+  await adminAgent.get('/api/v1/auth/csrf');
+  const adminAgentCookies: any = adminAgent.jar.getCookies(CookieAccessInfo.All);
+  const adminAgentCsrf = adminAgentCookies.find((c: any) => c.name === 'csrf')?.value;
+  await adminAgent
+    .post('/api/v1/admin/users')
+    .set('Authorization', `Bearer ${adminToken}`)
+    .set('X-CSRF-Token', adminAgentCsrf)
+    .send({ username, password, role: 'player' })
+    .expect(201);
+  return loginAs(app, username, password);
+}
+
+describe('Admin blog posts API (Job 869)', () => {
+  let app: INestApplication;
+  let adminToken: string;
+  let adminCsrf: string;
+  let adminAgent: ReturnType<typeof request.agent>;
+
+  beforeAll(async () => {
+    const moduleRef = await Test.createTestingModule({ imports: [AppModule] }).compile();
+    app = moduleRef.createNestApplication();
+    app.use(cookieParser());
+    app.use(express.json({ limit: '1mb' }));
+    const csrfMw = new CsrfMiddleware(app.get(ConfigService));
+    app.use((req: any, res: any, next: any) => csrfMw.use(req, res, next));
+    app.useGlobalPipes(new ValidationPipe({ whitelist: true, forbidNonWhitelisted: false, transform: true }));
+    const httpAdapterHost = app.get(HttpAdapterHost);
+    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
+    await app.init();
+    await initDb(app);
+
+    const server = app.getHttpServer();
+    await request(server).post('/api/v1/auth/register-first-admin')
+      .send({ username: 'admin', password: 'Sup3rSecret!Pass' })
+      .expect(201);
+
+    const logged = await loginAs(app, 'admin', 'Sup3rSecret!Pass');
+    adminToken = logged.accessToken;
+    adminCsrf = logged.csrf;
+    adminAgent = logged.agent;
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  it('GET /api/v1/admin/blog/posts without a token returns 401', async () => {
+    await request(app.getHttpServer()).get('/api/v1/admin/blog/posts').expect(401);
+  });
+
+  it('GET /api/v1/admin/blog/posts with a player JWT returns 403', async () => {
+    const player = await createPlayer(app, adminToken, adminCsrf, 'player1', 'Sup3rSecret!Pass');
+    await request(app.getHttpServer())
+      .get('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${player.accessToken}`)
+      .expect(403);
+  });
+
+  it('POST with status=draft creates a draft with publishedAt=null and POST with status=published stamps publishedAt', async () => {
+    const draft = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Draft Post', bodyMd: 'still cooking', status: 'draft' })
+      .expect(201);
+    expect(draft.body.status).toBe('draft');
+    expect(draft.body.publishedAt).toBeNull();
+    expect(draft.body.title).toBe('Draft Post');
+    expect(draft.body.id).toBeDefined();
+    expect(draft.body.createdAt).toBeDefined();
+
+    const published = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Live Post', bodyMd: '# Hello world', status: 'published' })
+      .expect(201);
+    expect(published.body.status).toBe('published');
+    expect(published.body.publishedAt).toBeTruthy();
+    expect(typeof published.body.publishedAt).toBe('string');
+  });
+
+  it('POST with empty title returns 400 VALIDATION_FAILED', async () => {
+    const res = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: '   ', bodyMd: 'x' })
+      .expect(400);
+    expect(res.body.code).toBe('VALIDATION_FAILED');
+  });
+
+  it('GET /api/v1/admin/blog/posts returns drafts AND published (admin-only view)', async () => {
+    const res = await adminAgent
+      .get('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .expect(200);
+    expect(Array.isArray(res.body)).toBe(true);
+    // Both 'Draft Post' and 'Live Post' should appear since we just created them.
+    const titles = res.body.map((p: any) => p.title);
+    expect(titles).toEqual(expect.arrayContaining(['Draft Post', 'Live Post']));
+    // Every row includes admin-only fields.
+    for (const p of res.body) {
+      expect(p.status).toBeDefined();
+      expect(p.createdAt).toBeDefined();
+      expect(p.updatedAt).toBeDefined();
+    }
+  });
+
+  it('PUT preserves draft state (publishedAt=null) on a draft edit; PUT to published stamps publishedAt once and preserves it on subsequent edits', async () => {
+    // 1. Create a draft.
+    const draft = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Edit Me Draft', bodyMd: 'v1', status: 'draft' })
+      .expect(201);
+    const draftId = draft.body.id;
+
+    // 2. Edit title/body without changing status -> stays draft, publishedAt stays null.
+    const edited = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${draftId}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Edit Me Draft (updated)', bodyMd: 'v2' })
+      .expect(200);
+    expect(edited.body.status).toBe('draft');
+    expect(edited.body.publishedAt).toBeNull();
+    expect(edited.body.bodyMd).toBe('v2');
+
+    // 3. Publish -> stamps publishedAt.
+    const firstPublish = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${draftId}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ status: 'published' })
+      .expect(200);
+    expect(firstPublish.body.status).toBe('published');
+    const originalPublishedAt = firstPublish.body.publishedAt;
+    expect(originalPublishedAt).toBeTruthy();
+
+    // 4. Wait a few ms and update body again; publishedAt must not change.
+    await new Promise((r) => setTimeout(r, 5));
+    const secondEdit = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${draftId}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ bodyMd: 'v3 — content edit after publish' })
+      .expect(200);
+    expect(secondEdit.body.status).toBe('published');
+    expect(secondEdit.body.publishedAt).toBe(originalPublishedAt);
+    expect(secondEdit.body.bodyMd).toBe('v3 — content edit after publish');
+
+    // 5. Demote to draft; publishedAt must be preserved so a later re-publish does not change it.
+    const demoted = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${draftId}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ status: 'draft' })
+      .expect(200);
+    expect(demoted.body.status).toBe('draft');
+    expect(demoted.body.publishedAt).toBe(originalPublishedAt);
+
+    // 6. Re-publish; publishedAt must STILL be the original timestamp.
+    const republished = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${draftId}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ status: 'published' })
+      .expect(200);
+    expect(republished.body.status).toBe('published');
+    expect(republished.body.publishedAt).toBe(originalPublishedAt);
+  });
+
+  it('DELETE removes the post and a subsequent DELETE returns 404', async () => {
+    const created = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'To Delete', bodyMd: 'goodbye', status: 'draft' })
+      .expect(201);
+    const id = created.body.id;
+
+    await adminAgent
+      .delete(`/api/v1/admin/blog/posts/${id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .expect(204);
+
+    await adminAgent
+      .delete(`/api/v1/admin/blog/posts/${id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .expect(404);
+  });
+
+  it('public GET /api/v1/blog/posts hides drafts after admin operations', async () => {
+    // Make sure a draft and a published exist (regression for public list).
+    await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Hidden Draft', bodyMd: 'should not leak', status: 'draft' })
+      .expect(201);
+
+    const res = await request(app.getHttpServer()).get('/api/v1/blog/posts').expect(200);
+    const titles = res.body.posts.map((p: any) => p.title);
+    expect(titles).not.toContain('Hidden Draft');
+    // No row in the public list should ever include admin-only fields.
+    for (const p of res.body.posts) {
+      expect(p.status).toBeUndefined();
+    }
+  });
+
+  it('PUT with empty title returns 400 VALIDATION_FAILED', async () => {
+    const created = await adminAgent
+      .post('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: 'Edit Title Test', bodyMd: '', status: 'draft' })
+      .expect(201);
+    const id = created.body.id;
+
+    const res = await adminAgent
+      .put(`/api/v1/admin/blog/posts/${id}`)
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .send({ title: '' })
+      .expect(400);
+    expect(res.body.code).toBe('VALIDATION_FAILED');
+  });
+});
+
+describe('Admin blog posts raw access', () => {
+  let app: INestApplication;
+  let adminAgent: ReturnType<typeof request.agent>;
+  let adminToken: string;
+  let adminCsrf: string;
+
+  beforeAll(async () => {
+    process.env.DATABASE_PATH = ':memory:';
+    process.env.THEMES_DIR = './themes';
+    process.env.FRONTEND_DIST = './frontend/dist';
+    const moduleRef = await Test.createTestingModule({ imports: [AppModule] }).compile();
+    app = moduleRef.createNestApplication();
+    app.use(cookieParser());
+    app.use(express.json({ limit: '1mb' }));
+    const csrfMw = new CsrfMiddleware(app.get(ConfigService));
+    app.use((req: any, res: any, next: any) => csrfMw.use(req, res, next));
+    const httpAdapterHost = app.get(HttpAdapterHost);
+    app.useGlobalFilters(new GlobalExceptionFilter(httpAdapterHost));
+    await app.init();
+    await initDb(app);
+
+    const server = app.getHttpServer();
+    await request(server).post('/api/v1/auth/register-first-admin')
+      .send({ username: 'rawadmin', password: 'Sup3rSecret!Pass' })
+      .expect(201);
+
+    const logged = await loginAs(app, 'rawadmin', 'Sup3rSecret!Pass');
+    adminToken = logged.accessToken;
+    adminCsrf = logged.csrf;
+    adminAgent = logged.agent;
+
+    // Seed one published + one draft directly via the entity manager.
+    const repo = app.get<any>(getRepositoryToken(BlogPostEntity));
+    await repo.insert([
+      {
+        id: 'seed-pub',
+        title: 'Seeded Published',
+        bodyMd: '# Published',
+        status: 'published',
+        publishedAt: '2026-07-21T10:00:00.000Z',
+        createdAt: '2026-07-20T10:00:00.000Z',
+        updatedAt: '2026-07-21T10:00:00.000Z',
+      },
+      {
+        id: 'seed-drf',
+        title: 'Seeded Draft',
+        bodyMd: 'wip',
+        status: 'draft',
+        publishedAt: null,
+        createdAt: '2026-07-22T10:00:00.000Z',
+        updatedAt: '2026-07-22T10:00:00.000Z',
+      },
+    ]);
+  });
+
+  afterAll(async () => {
+    await app.close();
+  });
+
+  it('returns both seeded rows including drafts for the admin', async () => {
+    const res = await adminAgent
+      .get('/api/v1/admin/blog/posts')
+      .set('Authorization', `Bearer ${adminToken}`)
+      .set('X-CSRF-Token', adminCsrf)
+      .expect(200);
+    const ids = res.body.map((p: any) => p.id);
+    expect(ids).toEqual(expect.arrayContaining(['seed-pub', 'seed-drf']));
+  });
+});

tests/frontend/blog-admin-form.spec.ts

@@ -0,0 +1,114 @@
+import '@angular/compiler';
+import { FormBuilder } from '@angular/forms';
+import {
+  PostFormGroup,
+  buildPostBody,
+  statusBadgeClass,
+  statusLabel,
+  syncPostForm,
+  validatePostForm,
+} from '../../frontend/src/app/features/admin/blog/blog-form.pure';
+import { AdminBlogPost } from '../../frontend/src/app/core/services/blog.service';
+
+function buildForm(): PostFormGroup {
+  const fb = new FormBuilder();
+  return fb.nonNullable.group({
+    title: fb.nonNullable.control(''),
+    bodyMd: fb.nonNullable.control(''),
+  });
+}
+
+function makePost(overrides: Partial<AdminBlogPost> = {}): AdminBlogPost {
+  return {
+    id: 'p-1',
+    title: 'Existing Title',
+    bodyMd: 'existing body',
+    status: 'draft',
+    createdAt: '2026-07-21T10:00:00.000Z',
+    updatedAt: '2026-07-22T10:00:00.000Z',
+    publishedAt: null,
+    ...overrides,
+  };
+}
+
+describe('validatePostForm', () => {
+  it('rejects empty title', () => {
+    const r = validatePostForm({ title: '', bodyMd: 'x' });
+    expect(r.ok).toBe(false);
+    expect(r.errors.title).toBeDefined();
+  });
+
+  it('rejects whitespace-only title', () => {
+    const r = validatePostForm({ title: '   \t  ', bodyMd: 'x' });
+    expect(r.ok).toBe(false);
+    expect(r.errors.title).toBeDefined();
+  });
+
+  it('rejects title longer than 200 characters', () => {
+    const r = validatePostForm({ title: 'a'.repeat(201), bodyMd: '' });
+    expect(r.ok).toBe(false);
+    expect(r.errors.title).toBeDefined();
+  });
+
+  it('rejects body longer than 200000 characters', () => {
+    const r = validatePostForm({ title: 'ok', bodyMd: 'x'.repeat(200_001) });
+    expect(r.ok).toBe(false);
+    expect(r.errors.bodyMd).toBeDefined();
+  });
+
+  it('accepts a valid title and empty body', () => {
+    const r = validatePostForm({ title: '  Real Title  ', bodyMd: '' });
+    expect(r.ok).toBe(true);
+    expect(r.errors.title).toBeUndefined();
+    expect(r.errors.bodyMd).toBeUndefined();
+  });
+});
+
+describe('syncPostForm', () => {
+  it('prefills the form for edit mode with a post', () => {
+    const form = buildForm();
+    syncPostForm(form, 'edit', makePost());
+    expect(form.controls.title.value).toBe('Existing Title');
+    expect(form.controls.bodyMd.value).toBe('existing body');
+    expect(form.controls.title.pristine).toBe(true);
+    expect(form.controls.title.touched).toBe(false);
+  });
+
+  it('clears the form for create mode with null post', () => {
+    const form = buildForm();
+    syncPostForm(form, 'edit', makePost());
+    expect(form.controls.title.value).toBe('Existing Title');
+    syncPostForm(form, 'create', null);
+    expect(form.controls.title.value).toBe('');
+    expect(form.controls.bodyMd.value).toBe('');
+  });
+
+  it('re-populates when invoked a second time with a different post', () => {
+    const form = buildForm();
+    syncPostForm(form, 'edit', makePost({ title: 'Alpha' }));
+    expect(form.controls.title.value).toBe('Alpha');
+    syncPostForm(form, 'edit', makePost({ title: 'Bravo', bodyMd: 'b body' }));
+    expect(form.controls.title.value).toBe('Bravo');
+    expect(form.controls.bodyMd.value).toBe('b body');
+  });
+});
+
+describe('buildPostBody', () => {
+  it('trims the title and passes body through', () => {
+    expect(buildPostBody({ title: '  hello  ', bodyMd: 'md' })).toEqual({
+      title: 'hello',
+      bodyMd: 'md',
+    });
+  });
+});
+
+describe('statusBadgeClass / statusLabel', () => {
+  it('maps draft → badge-draft and "Draft"', () => {
+    expect(statusBadgeClass('draft')).toBe('badge-draft');
+    expect(statusLabel('draft')).toBe('Draft');
+  });
+  it('maps published → badge-published and "Published"', () => {
+    expect(statusBadgeClass('published')).toBe('badge-published');
+    expect(statusLabel('published')).toBe('Published');
+  });
+});

tests/frontend/blog-page.spec.ts

@@ -0,0 +1,41 @@
+import { deriveBlogListState } from '../../frontend/src/app/features/blog/blog.pure';
+import { renderMarkdownToHtml } from '../../frontend/src/app/core/services/markdown.pure';
+
+describe('deriveBlogListState', () => {
+  it('returns loading when loading is true (regardless of error/posts)', () => {
+    expect(deriveBlogListState({ loading: true, error: null, count: 0 }).kind).toBe('loading');
+    expect(deriveBlogListState({ loading: true, error: 'x', count: 3 }).kind).toBe('loading');
+  });
+
+  it('returns error when not loading and error message set', () => {
+    const s = deriveBlogListState({ loading: false, error: 'boom', count: 0 });
+    expect(s.kind).toBe('error');
+    expect(s.message).toBe('boom');
+  });
+
+  it('returns empty when not loading and no posts', () => {
+    expect(deriveBlogListState({ loading: false, error: null, count: 0 }).kind).toBe('empty');
+  });
+
+  it('returns list when posts exist', () => {
+    expect(deriveBlogListState({ loading: false, error: null, count: 3 }).kind).toBe('list');
+  });
+});
+
+describe('shared Markdown presentation', () => {
+  it('produces the same HTML for the same Markdown body (sanitized, no script)', () => {
+    const md = '# Title\n\nSome **bold** text and <script>alert(1)</script>';
+    const a = renderMarkdownToHtml(md);
+    const b = renderMarkdownToHtml(md);
+    expect(a).toBe(b);
+    expect(a).toContain('<h1>Title</h1>');
+    expect(a).toContain('<strong>bold</strong>');
+    expect(a).not.toContain('<script>');
+  });
+
+  it('strips dangerous javascript: hrefs in both contexts', () => {
+    const md = '[click](javascript:alert(1))';
+    const a = renderMarkdownToHtml(md);
+    expect(a).not.toMatch(/href="javascript:/i);
+  });
+});