blog umami fix

openspec/changes/blog-umami-fix/specs/blog-section-surface/spec.md

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+## MODIFIED Requirements
+
+### 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).
+
+Each post card MUST be instrumented with Umami Track Events data attributes and MUST include at minimum:
+- `data-umami-event`
+- `data-umami-event-target_id`
+- `data-umami-event-placement`
+- `data-umami-event-target_url`
+
+#### 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
+
+#### Scenario: Blog post card click is tracked
+- **WHEN** a user clicks a blog post card on `/blog`
+- **THEN** the click emits an Umami event with `target_id`, `placement`, and `target_url`
+
+### 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.
+
+Each secondary navigation link MUST be instrumented with Umami Track Events data attributes and MUST include at minimum:
+- `data-umami-event`
+- `data-umami-event-target_id`
+- `data-umami-event-placement`
+- `data-umami-event-target_url`
+
+#### 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
+
+#### Scenario: Category nav click is tracked
+- **WHEN** a user clicks a category link in the blog secondary navigation
+- **THEN** the click emits an Umami event with `target_id`, `placement`, and `target_url`
+