Migrate from Turbolinks 5 to Hotwire Turbo 8

[amitaibu]

Migrates IHP from legacy Turbolinks 5.1.1 to modern Hotwire Turbo 8.0.13, replacing morphdom with Turbo's built-in morphing.

Changes

• Replace Turbolinks with Turbo 8.0.13 bundle
• Remove morphdom dependency - use Turbo's Idiomorph instead
• Enable morphing with <meta name="turbo-refresh-method" content="morph">
• Update auto-refresh to use Turbo Streams
• Migrate transitionToNewPage() to Turbo.renderPage() API
• Update events: turbolinks:load → turbo:load

Benefits

🚀 Better performance with Idiomorph vs morphdom
📦 Single library instead of multiple dependencies
🔧 Actively maintained vs discontinued Turbolinks

Test plan

• IDE navigation works
• Auto-refresh preserves form state
• Live reload
• Handle js-delete
• Server-side components functional
• IDE close modal dialogs
• IDE Delete button

🤖 Generated with Claude Code

[amitaibu]

This will require more testing, and likely would need a new release with upgrade notes (to update the JS files projects call on Layout.hs)

Peek.2025-07-08.17-39.mp4

But so far it's working 🤯

Seems to also fix #2063 that triggered this experiment 😄

[amitaibu]

Auto refresh is also working.

Peek.2025-07-08.18-59.mp4

[amitaibu]

I'm trying to check the SSC following https://ihp.digitallyinduced.com/Guide/server-side-components.html#serverside-components

But I'm getting this error.

My flake.nix has ihp.url = "path:///home/amitaibu/Sites/ihp-landing-page/IHP";, and I've nix flake update and direnv allow

What else might I be missing?

p.s. Is anyone using SSC? Is this a feature we might want to drop at a certain point?

[amitaibu]

@mpscholten this can already benefit from a review/ testing locally, as it's a big change.

[amitaibu]

I've fixed ihp-scc not working, maybe it's not needed if running non-local IHP 🤷

haskellPackages = p: with p; [
    # Haskell dependencies go here
    p.ihp
+   p.ihp-ssc

[amitaibu]

SSC is now included in the compile, but it complains about the code from the guide. So maybe someone that has ever used it, should give it a try 😄

[amitaibu]

@unhammer care to check your scenario with the back button? You can do it by changing in your flake.nix

1. ihp.url = "github:digitallyinduced/ihp/pull/2087/head"; and direnv reload
2. And in Layout.hs

- <script src={assetPath "/vendor/morphdom-umd.min.js"}></script>
+ <script src={assetPath "/vendor/turbo.js"}></script>
- <script src={assetPath "/vendor/turbolinks.js"}></script>
- <script src={assetPath "/vendor/turbolinksInstantClick.js"}></script>
- <script src={assetPath "/vendor/turbolinksMorphdom.js"}></script>