## Purpose

Expose a blog section on the site backed by cached WordPress content, including listing, detail pages, and category browsing.

## ADDED Requirements

### Requirement: Primary navigation entry
The site MUST add a header navigation link to the blog index at `/blog` labeled "Blog".

#### Scenario: Blog link in header
- **WHEN** a user views any page
- **THEN** the header navigation includes a "Blog" link that navigates to `/blog`

### Requirement: Blog index listing (posts)
The site MUST provide a blog index page at `/blog` that lists WordPress posts as cards containing:
- featured image (when available)
- title
- excerpt/summary

The listing MUST be ordered by publish date descending (newest first).

#### Scenario: Blog index lists posts
- **WHEN** the cached WordPress dataset contains posts
- **THEN** `/blog` renders a list of post cards ordered by publish date descending

### Requirement: Blog post detail
The site MUST provide a blog post detail page for each WordPress post that renders:
- title
- publish date
- featured image (when available)
- full post content

#### Scenario: Post detail renders
- **WHEN** a user navigates to a blog post detail page
- **THEN** the page renders the full post content from the cached WordPress dataset

### Requirement: WordPress pages support
The blog section MUST support WordPress pages by rendering page detail routes that show:
- title
- featured image (when available)
- full page content

#### Scenario: Page detail renders
- **WHEN** a user navigates to a WordPress page detail route
- **THEN** the page renders the full page content from the cached WordPress dataset

### Requirement: Category-based secondary navigation
The blog section MUST render a secondary navigation under the header derived from the cached WordPress categories.

Selecting a category MUST navigate to a category listing page showing only posts in that category.

#### Scenario: Category nav present
- **WHEN** the cached WordPress dataset contains categories
- **THEN** the blog section shows a secondary navigation with those categories

#### Scenario: Category listing filters posts
- **WHEN** a user navigates to a category listing page
- **THEN** only posts assigned to that category are listed

### Requirement: Graceful empty states
If there are no WordPress posts available, the blog index MUST render a non-broken empty state and MUST still render header/navigation.

#### Scenario: No posts available
- **WHEN** the cached WordPress dataset contains no posts
- **THEN** `/blog` renders a helpful empty state