Add rudimentary entry page, fix main frame link navigation

src/handlers/entry.rs

@@ -0,0 +1,18 @@
+use axum::extract::{State, Path};
+use axum::response::Response;
+use maud::html;
+use sqlx::PgPool;
+
+use crate::error::Result;
+use crate::models::entry::get_entry;
+use crate::partials::layout::Layout;
+
+pub async fn get(Path(id): Path<i32>, State(pool): State<PgPool>, layout: Layout) -> Result<Response> {
+    let entry = get_entry(&pool, id).await?;
+    Ok(layout.render(html! {
+        @let title = entry.title.unwrap_or_else(|| "Untitled".to_string());
+        h1 { a href=(entry.url) { (title) } }
+        @let description = entry.description.unwrap_or_else(|| "No description".to_string());
+        p { (description) }
+    }))
+}