refactor: re-structure frontend code

src/main.rs

@@ -1,7 +1,7 @@
 #![allow(unused)]
 #![allow(dead_code)]
 
-use compendium::{router, AppState, Link, Result};
+use compendium::{router, AppState, Error, Link, Result};
 use minijinja::{Environment, Value};
 use std::sync::Arc;
 use tower_http::trace::TraceLayer;
@@ -12,7 +12,16 @@ fn load_templates() -> Result<Environment<'static>> {
     let mut tmpl_env = Environment::new();
 
     #[cfg(debug_assertions)]
-    tmpl_env.set_loader(minijinja::path_loader("templates")); // Path is relative to project root
+    {
+        tmpl_env.set_loader(minijinja::path_loader("dist")); // Path is relative to project root
+
+        let _ = tmpl_env.get_template("base.html");
+        if tmpl_env.templates().count() == 0 {
+            return Err(Error::Runtime(
+                "Templates not found, did you build the frontend with `just build-frontend`??",
+            ));
+        }
+    }
 
     // only enable in production build
     #[cfg(not(debug_assertions))]