Revert pinned items rising to the top of their list

Sorting by the pin column, or the Pinned tab, was enough. order_sql loses its
pinned_first option, pinning no longer reloads the list, and the tests and
changelog line for #35 go. The NULLS FIRST/LAST ordering from the Postgres work
stays.

Closes #36.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/web.rs

@@ -1146,12 +1146,7 @@ async fn entry_page(
     let filter = crate::db::Filter::parse(page.filter.as_deref().unwrap_or("all"));
     let search = page.q.as_deref().map(str::trim).filter(|q| !q.is_empty());
     let db = &state.ctx.db;
-    // Currently Listening keeps its own order, pinned or not: it is what you are part-way through.
-    let order = crate::db::order_sql(
-        page.sort.as_deref().unwrap_or("published"),
-        page.dir.as_deref().unwrap_or("desc"),
-        filter != crate::db::Filter::InProgress,
-    );
+    let order = crate::db::order_sql(page.sort.as_deref().unwrap_or("published"), page.dir.as_deref().unwrap_or("desc"));
     let mut rows =
         db.entries_in(user_id, feed, filter, search, page.offset, page.limit.clamp(1, 200), &order).await?;
     let mut sanitizer = feed_sanitizer();