Fix Pro dummy lockfile drift and rich text demo (#3989)

## Summary

- Normalize the Pro dummy lockfile's `connection_pool` entry back to
`3.0.2` so it matches the current Ruby 4-compatible sibling locks.
- Restore the execjs-compatible dummy sqlite3 platform lock entries
while keeping the generic Ruby/source fallback, with a Ruby 3.4+
`force_ruby_platform` guard for sqlite3 1.7.3.
- Render `ReactIntlRscDemo` rich-text ICU placeholders as real React
`<a>` and `<strong>` elements instead of bracket/markdown-like strings.

Fixes #3981.

## Scope Confirmation

Changed files are limited to issue #3981 scope:

- `react_on_rails_pro/spec/dummy/Gemfile.lock`
- `react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile`
- `react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile.lock`
-
`react_on_rails_pro/spec/dummy/client/app/ror-auto-load-components/ReactIntlRscDemo.jsx`

No `react-on-rails-rsc` pin-range work, #3963-reserved docs, Machine A
issue work, or unrelated dependency upgrades are included.

## Agent Merge Confidence

Mode: accelerated-rc
Current head SHA: `635bd6e371b9c0b705729bffbb6eda23a7544881`
Score: 9/10
Auto-merge recommendation: yes
Affected areas: Pro dummy lockfiles, execjs-compatible dummy sqlite3
platform selection, Pro RSC/React Intl demo rendering
CI detector: `script/ci-changes-detector origin/main` -> Pro dummy app;
recommends lint, Pro lint, Pro dummy integration tests, and Pro
benchmarks
Validation run:
- `git diff --check origin/main...HEAD` -> pass
- `ruby script/check-gemfile-lock-platforms` -> pass; all 6 lockfiles
include `x86_64-linux`
- `(cd react_on_rails_pro/spec/dummy && BUNDLE_FROZEN=true bundle
_2.5.4_ check)` -> pass
- `(cd react_on_rails_pro/spec/execjs-compatible-dummy &&
BUNDLE_FROZEN=true bundle _2.5.9_ check)` -> pass
- `(cd react_on_rails_pro/spec/execjs-compatible-dummy &&
BUNDLE_FROZEN=true bundle _2.5.9_ exec ruby -e 'require "sqlite3";
...')` -> pass; Ruby 4.0.5 selects `sqlite3-1.7.3 platform=ruby`
- `pnpm exec prettier --check
react_on_rails_pro/spec/dummy/client/app/ror-auto-load-components/ReactIntlRscDemo.jsx`
-> pass
- `pnpm exec eslint
react_on_rails_pro/spec/dummy/client/app/ror-auto-load-components/ReactIntlRscDemo.jsx`
-> pass; baseline browser-mapping age warning only
- `(cd react_on_rails_pro/spec/dummy && pnpm run build:test)` -> pass;
existing webpack/browser-data warnings only
- RSC payload smoke for `/rsc_payload/ReactIntlRscDemo` with local node
renderer -> pass; 200 `application/x-ndjson`, 23 parsed chunks,
serialized Flight payload contains the `/terms` anchor and `strong`
privacy text, and omits the old `[terms of service]` / `**privacy
policy**` fallbacks
- `(cd react_on_rails_pro/spec/dummy && BUNDLE_GEMFILE=Gemfile
RAILS_ENV=test NODE_ENV=test bundle exec rspec
spec/requests/rsc_payload_spec.rb)` -> pass; 3 examples, 0 failures
- `(cd react_on_rails && BUNDLE_GEMFILE=../Gemfile bundle exec rubocop)`
-> pass; 218 files, no offenses
- `(cd react_on_rails_pro && BUNDLE_GEMFILE=../Gemfile bundle exec
rubocop --ignore-parent-exclusion)` -> pass; 231 files, no offenses
- `codex review --base origin/main` -> no discrete correctness,
compatibility, or maintainability regressions found
Review/check gate:
- GitHub checks: complete for
`635bd6e371b9c0b705729bffbb6eda23a7544881`; 25 pass, 10 skipped, 0
failed, 0 pending
- Skipped checks: docs/examples/package-js/gem spec jobs skipped by
path/full-CI selector for Pro dummy changes; benchmark
planning/reporting helper rows skipped after benchmark run completion;
secondary `claude` job skipped while `claude-review` passed
- Review threads: GraphQL unresolved count is 0
- Current-head reviewer verdicts:
- Claude review: `claude-review` check passed for
`635bd6e371b9c0b705729bffbb6eda23a7544881`, no confirmed blocker;
advisory rich-text thread was replied to and resolved
- CodeRabbit: formal `APPROVED` review for
`635bd6e371b9c0b705729bffbb6eda23a7544881`; post-undraft CodeRabbit
check passed
  - Greptile Review: passed after undraft
- Cursor Bugbot: success for current head, no blocking finding reported
  - Codex review: local `codex review --base origin/main` clean
Known residual risk: Low. The main residual risk was cross-Ruby/platform
Bundler behavior for sqlite3 1.7.3; current-head full CI, Pro dummy
integration, local frozen bundle checks, Ruby 4 sqlite3 load check, and
Pro benchmarks completed without failures.
Finalized by: `claude-review` GitHub check / Claude Code Review workflow
for current head, run
https://github.com/shakacode/react_on_rails/actions/runs/27465345318/job/81186595599

## Label/CI Decision

Labels: `full-ci, benchmark`. This PR touches Pro dummy lockfiles plus
an RSC/React Intl demo rendering path, and the CI detector selected Pro
dummy/pro benchmark coverage.

## Merge Recommendation

Merge. Current-head checks and reviewer gates are complete, unresolved
review threads are 0, and the accelerated-RC confidence block is
finalized for the current head.

Author: justin808

react_on_rails_pro/spec/dummy/Gemfile.lock

@@ -152,7 +152,7 @@ GEM
     childprocess (5.0.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.6)
-    connection_pool (2.5.5)
+    connection_pool (3.0.2)
     console (1.34.2)
       fiber-annotation
       fiber-local (~> 1.1)

react_on_rails_pro/spec/dummy/client/app/ror-auto-load-components/ReactIntlRscDemo.jsx

@@ -52,6 +52,15 @@ const BADGE = (bg, color) => ({
   color,
   marginLeft: 8,
 });
+const RICH_TEXT_LINK_STYLE = { color: '#2563eb', textDecoration: 'underline' };
+const RICH_TEXT_FORMATTERS = {
+  link: (chunks) => (
+    <a href="/terms" style={RICH_TEXT_LINK_STYLE}>
+      {chunks}
+    </a>
+  ),
+  bold: (chunks) => <strong>{chunks}</strong>,
+};
 
 function GreetingSection({ locale }) {
   const intl = getIntl(locale);
@@ -418,13 +427,7 @@ function AdvancedICUSection({ locale }) {
     },
     {
       label: 'rich text',
-      value: intl.formatMessage(
-        { id: 'advanced.richText' },
-        {
-          link: (chunks) => `[${chunks}]`,
-          bold: (chunks) => `**${chunks}**`,
-        },
-      ),
+      value: React.Children.toArray(intl.formatMessage({ id: 'advanced.richText' }, RICH_TEXT_FORMATTERS)),
     },
     {
       label: 'escaped apostrophes',

react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile

@@ -28,7 +28,7 @@ gem "rails", "~> 7.1", ">= 7.1.3.2"
 gem "sprockets-rails"
 
 # Use sqlite3 as the database for Active Record
-gem "sqlite3", "~> 1.4"
+gem "sqlite3", "~> 1.4", force_ruby_platform: Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("3.4")
 
 # Use the Puma web server [https://github.com/puma/puma]
 gem "puma", ">= 5.0"

react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile.lock

@@ -319,6 +319,12 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.7.3)
       mini_portile2 (~> 2.8.0)
+    sqlite3 (1.7.3-aarch64-linux)
+    sqlite3 (1.7.3-arm-linux)
+    sqlite3 (1.7.3-arm64-darwin)
+    sqlite3 (1.7.3-x86-linux)
+    sqlite3 (1.7.3-x86_64-darwin)
+    sqlite3 (1.7.3-x86_64-linux)
     stringio (3.2.0)
     thor (1.5.0)
     timeout (0.6.0)