feat(axum): expose hashed runtime asset path

Generate a SHA-256 content hash for the embedded hemx runtime, expose the hashed path from hemx-axum, serve immutable runtime headers, and update examples to load the hemx-owned path instead of fixed /hemx.js URLs.

req: axum_integration/005

examples/saas/src/lib.rs

@@ -4,7 +4,8 @@ pub mod ui {}
 use hemplate::Hemplate;
 use hemx::{push, Html, IntoEffect};
 use hemx_axum::{
-    interactions, Form, HandlerErrorContext, HandlerFailure, IntoHandlerFailure, Registry, State,
+    interactions, runtime_js_path, Form, HandlerErrorContext, HandlerFailure, IntoHandlerFailure,
+    Registry, State,
 };
 use std::convert::Infallible;
 use std::fmt::Display;
@@ -248,12 +249,14 @@ impl SettingsPage {
 #[derive(Hemplate)]
 pub struct AppShell {
     title: &'static str,
+    runtime_src: &'static str,
     body: Html,
 }
 
 pub fn home_page(ctx: &AppContext) -> Html {
     hemx::page(&AppShell {
         title: "hemx SaaS tutorial",
+        runtime_src: runtime_js_path(),
         body: hemx::page(&Dashboard::from_context(ctx)),
     })
 }
@@ -261,6 +264,7 @@ pub fn home_page(ctx: &AppContext) -> Html {
 pub fn settings_page(ctx: &AppContext) -> Html {
     hemx::page(&AppShell {
         title: "hemx SaaS tutorial settings",
+        runtime_src: runtime_js_path(),
         body: hemx::page(&Dashboard::settings(ctx)),
     })
 }

examples/saas/src/main.rs

@@ -5,7 +5,7 @@ use axum::routing::get;
 use axum::Router;
 use futures_util::stream;
 use hemx::IntoEffect;
-use hemx_axum::{runtime_js, sse, EffectResponse, InteractionRequest};
+use hemx_axum::{runtime_js, runtime_js_path, sse, EffectResponse, InteractionRequest};
 use hemx_saas_example::{home_page, live_status, registry, settings_page, ui, AppContext};
 use std::collections::BTreeMap;
 use std::convert::Infallible;
@@ -26,7 +26,7 @@ fn app(ctx: AppContext) -> Router {
         .route("/", get(home).post(interact))
         .route("/settings", get(settings))
         .route("/events", get(events))
-        .route("/hemx.js", get(runtime))
+        .route(runtime_js_path(), get(runtime))
         .route("/app.css", get(css))
         .route("/metrics.js", get(metrics_js))
         .with_state(ctx)