[SharonStrats]

The file explorer header changed a bit because of feedback, also I changed the provider to be headless as well to address feedback Noel had raised.

The content fetch was moved to solid-logic

[Copilot]

🟡 Changes recommended

Unresolved editor lifecycle and synchronization issues can leave stale content or inconsistent editing state and risk saving text to the wrong resource.

4 open issues

• Reloaded URI leaves editor content stale · New
• Out-of-order synchronization replaces selected resource content · New
• Resource switch leaves editing controls active · New
• Editing action can run before editor initialization · New

What changed in this PR

Refactors the Source pane to integrate with the shared file explorer context, using a headless provider and a lazily loaded editor.

Changes:

• Adds editor registration and resource synchronization through shared contexts.
• Moves resource loading to solid-logic and updates dependencies.
• Adds JavaScript file selection and file-creation handling, with integration documentation and tests.

File	Description
test/​sourceProvider.test.js	Tests registration lifecycle, context updates, and editing delegation.
test/​sourcePane.test.js	Tests lazy loading, JavaScript selection, and file creation.
test/​sourceEditorCard.test.js	Tests deferred initialization and resource switching.
test/​helpers.test.js	Removes tests for the deleted local resource loader.
src/​sourcePane.ts	Lazily mounts the editor and adjusts selection and creation behavior.
src/​resourceLoader.ts	Removes resource-loading helpers replaced by solid-logic.
src/​primitives/​context.ts	Adds resource URI and loading state to source context.
src/​components/​source-provider/​SourceProvider.ts	Adopts shared explorer registration and slotted editor content.
src/​components/​source-provider/​SourceProvider.styles.css	Removes provider layout styles.
src/​components/​source-editor-card/​SourceEditorCard.ts	Adds context-driven initialization and resource synchronization.
README.md	Documents explorer integration and JavaScript selection.
package.json	Updates pane registry and resource logic dependencies.
package-lock.json	Records dependency and toolkit resolution changes.

_{Review effort: Balanced}