fix: reload active pr context when readding pat.

[knightedcodemonkey]

• fixes Active PR context is not rehydrated after PAT is removed and re-added #41

[Copilot]

Pull request overview

Fixes #41 by ensuring that when a user removes their GitHub PAT and later re-adds it, the app preferentially selects the repository that has a saved active PR context, allowing the existing PR verification + push-commit mode rehydration flow to run without manual repo switching.

Changes:

• Add a helper to locate the first writable repository that has a valid saved active PR context in localStorage.
• Update repo auto-selection logic (when no stored selection exists) to prefer the repo with an active PR context.
• Add Playwright coverage for PAT remove → re-add flows (PR open vs PR closed).

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
src/modules/github-pr-drawer.js	Exports findRepositoryWithActivePrContext() to detect which writable repo has an active PR context saved.
src/modules/github-byot-controls.js	Uses the new helper to choose the initial repo when no prior repo selection exists (notably after PAT deletion clears selection).
playwright/github-pr-drawer.spec.ts	Adds tests validating active PR context rehydration after PAT remove/re-add, including closed-PR deactivation behavior.

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