OAuth Support

[acrosman]

The replaces the existing login solution with OAuth support. Includes setup instructions in the readme file to handle creating an external client app. Significant real-world testing needed before merge.

This also adds a battery of Jest tests with a workflow to run them. Test coverage should be expanded in another PR for #27.

Closes #55

[Copilot]

Pull request overview

This PR replaces the prior password-based Salesforce login flow with an OAuth (External Client App / Connected App) flow in the Electron main process, adds persistent settings for OAuth credentials, and introduces a Jest-based test suite plus a CI workflow to run it.

Changes:

• Implement OAuth login (sf_oauth_start) with a localhost callback server and token exchange via JSForce.
• Add persistent settings storage (src/settings.js) and renderer UI wiring for Settings load/save via IPC.
• Add Jest tests (main process, renderer, settings) and a GitHub Actions workflow to run npm test.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/electronForce.js	Adds OAuth flow, settings IPC handlers, and shared connection creation helper.
src/settings.js	Implements read/write of settings in userData/settings.json with defaults.
app/render.js	Adds OAuth + settings IPC handlers and replaces login UI trigger with OAuth start.
app/preload.js	Updates IPC allow-lists for new OAuth/settings channels.
app/index.html	Replaces login form with OAuth authorize button; adds Settings modal.
main.js	Adjusts navigation/redirect blocking behavior for OAuth-era flow.
tests/*.test.js	Adds unit tests for settings, renderer handlers, and OAuth/login handler behavior.
__mocks__/electron.js	Adds shared Electron manual mock for tests.
.github/workflows/tests.yml	Adds CI workflow to run Jest tests on pushes/PRs.
package.json / package-lock.json	Adds jsdom test environment dependency and lockfile updates.
ReadMe.md	Documents External Client App setup and OAuth-based connection flow.
.github/copilot-instructions.md	Documents new settings module, test mocks, and OAuth conventions.

[acrosman]

@copilot open a new pull request to apply changes based on the comments in this thread

[Copilot]

@acrosman I've opened a new pull request, #107, to work on those changes. Once the pull request is ready, I'll request review from you.