add hire/resume pages, contact form, security middleware, and admin improvements

internal/blog/store.go

@@ -161,6 +161,28 @@ func (s *Store) Search(query string) ([]*Post, error) {
 	return results, nil
 }
 
+// Neighbors returns the posts immediately older and newer than slug in
+// date-descending order (newer = more recent = lower index).
+// Either value may be nil if slug is at the boundary.
+func (s *Store) Neighbors(slug string) (older, newer *Post, err error) {
+	posts, err := s.All(false)
+	if err != nil {
+		return nil, nil, err
+	}
+	for i, p := range posts {
+		if p.Slug == slug {
+			if i+1 < len(posts) {
+				older = posts[i+1]
+			}
+			if i > 0 {
+				newer = posts[i-1]
+			}
+			return older, newer, nil
+		}
+	}
+	return nil, nil, errors.New("post not found: " + slug)
+}
+
 // AllTags returns a deduplicated list of tags across all published posts.
 func (s *Store) AllTags() ([]string, error) {
 	posts, err := s.All(false)