Filter future-dated posts from public views and add unfiltered post access

- all_posts/0 now excludes posts where date > today
- all_tags/0 computed at runtime from filtered posts
- posts_by_tag/1 and recent_posts/1 inherit date filtering
- Add unfiltered_posts/0 to Blog macro and FakeBlog
- Add all_posts_unfiltered/0 to Registry for dashboard use

blogex/test/support/fake_blog.ex

@@ -51,9 +51,16 @@ defmodule Blogex.Test.FakeBlog do
   def description, do: get(:description)
   def base_path, do: get(:base_path)
 
-  def all_posts do
+  def unfiltered_posts do
     get(:posts)
-    |> Enum.filter(& &1.published)
+    |> Enum.sort_by(& &1.date, {:desc, Date})
+  end
+
+  def all_posts do
+    today = Date.utc_today()
+
+    get(:posts)
+    |> Enum.filter(&(&1.published and not Date.after?(&1.date, today)))
     |> Enum.sort_by(& &1.date, {:desc, Date})
   end
 

blogex/test/support/setup.ex

@@ -44,6 +44,12 @@ defmodule Blogex.Test.Setup do
         date: ~D[2026-03-12],
         tags: ["elixir"],
         published: false
+      ),
+      build(
+        id: "future-post",
+        date: ~D[2099-01-01],
+        tags: ["future-only"],
+        published: true
       )
     ]
   end