add latest blog post to admin dashboard view

controller/blog.go

@@ -44,6 +44,18 @@ func GetBlogPosts(db *sqlx.DB, onlyVisible bool, limit int, offset int) ([]*mode
     return blogs, nil
 }
 
+func GetBlogPostCount(db *sqlx.DB, onlyVisible bool) (int, error) {
+    query := "SELECT count(*) FROM blogpost"
+    if onlyVisible {
+        query += " WHERE visible=true"
+    }
+
+    var count int
+    err := db.Get(&count, query)
+
+    return count, err
+}
+
 func CreateBlogPost(db *sqlx.DB, post *model.BlogPost) error {
     _, err := db.Exec(
         "INSERT INTO blogpost (id,title,description,visible,author,markdown,html,bluesky_actor,bluesky_post) " +