* chore(react): centralize React root creation via createPluginRoot helper
Every standalone React root in the plugin must wrap its tree in
AppContext.Provider so descendants can rely on useApp() — PR #2466 fixed
one missing wrap (QuickAskOverlay) but the contract was implicit and any
new createRoot callsite could silently re-introduce the same crash.
Introduce a createPluginRoot(container, app) helper that injects the
provider automatically, migrate all 17 createRoot callsites to use it,
and add a Jest guardrail that fails if any non-helper file imports
createRoot from react-dom/client.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
* chore(lint): replace createRoot Jest guardrail with ESLint rule
Switch the createPluginRoot enforcement from a Jest test (walks src/
and greps imports) to an ESLint no-restricted-syntax rule. Same
invariant, faster feedback (in-editor instead of on test run), and one
fewer test file to maintain. The helper file is exempted via the
config block's `ignores`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
