chore: bump react_on_rails to 16.7.0.rc.0

[justin808]

Refs shakacode/react_on_rails#3360

RC test checklist

• Automated: install Ruby dependencies with the updated Gemfile.lock
• Automated: install JS dependencies with pnpm and the updated pnpm-lock.yaml
• Automated: run the app's test suite / build checks
• Manual: boot the Hacker News RSC demo and verify the primary page renders
• Manual: verify RSC/SSR behavior with the Pro node renderer

Implementation notes

• Base branch: main
• Base commit: 79f9b8141516b248e314d64d1dec1f9ada052ed5
• Updated Ruby pins: react_on_rails and react_on_rails_pro to 16.7.0.rc.0
• Updated npm pins: react-on-rails-pro and react-on-rails-pro-node-renderer to 16.7.0-rc.0
• react-on-rails-rsc was already React-versioned at 19.0.4, so it was intentionally left unchanged.
• Package manager choice preserved: pnpm (packageManager: pnpm@10.22.0).
• Missing lockfiles noted: no yarn.lock, package-lock.json, or npm-shrinkwrap.json found.

Verification

• Regenerated Gemfile.lock with bundle lock --update react_on_rails react_on_rails_pro in a temporary workspace.
• Verified RubyGems checksums for react_on_rails and react_on_rails_pro 16.7.0.rc.0 and let Bundler resolve the Pro dependency updates.
• Ran corepack pnpm install --lockfile-only with pnpm 10.22.0 in a temporary workspace.

Caveats

• No full app test suite was run because the local clone is unavailable in this environment; this PR is opened as draft for the RC matrix validation pass.

---

Note

Medium Risk
Moderate risk because it upgrades core Rails gems and the react_on_rails_pro stack (including a jwt major bump) which can affect SSR/RSC and request handling despite no application code changes.

Overview
Updates the app to react_on_rails/react_on_rails_pro 16.7.0.rc.0 and aligns the JS side by bumping react-on-rails-pro and react-on-rails-pro-node-renderer to 16.7.0-rc.0 (lockfile regenerated).

As part of resolving the new Pro dependencies, the Ruby lockfile also moves Rails from 8.1.2 to 8.1.3 and updates several transitive gems (notably jwt to 3.2.0). Adds a .ruby-version pin (3.4.6) and checks in an initial db/schema.rb.

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Ruby version mismatch across environments
  • Updated the Dockerfile Ruby build argument and README prerequisite to match .ruby-version at 3.4.6.

Or push these changes by commenting:

@cursor push b87f9fd367

Preview (b87f9fd367)

diff --git a/Dockerfile b/Dockerfile
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@
 # For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version
-ARG RUBY_VERSION=3.4.3
+ARG RUBY_VERSION=3.4.6
 FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
 
 # Rails app lives here

diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@
 
 ### Prerequisites
 
-- Ruby `3.4.3`
+- Ruby `3.4.6`
 - Node.js `24.8.0`
 - `pnpm`
 - PostgreSQL

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