feat(github): support per-workspace GitHub App registrations (#1810)

docs/plans/github-authentication/task-09-e2e-docs.md

@@ -0,0 +1,59 @@
+---
+id: "09-e2e-docs"
+title: "End-to-end coverage and public docs"
+status: done
+wave: 7
+depends_on: ["08-frontend-settings"]
+plan: "plan.md"
+spec: "../../specs/integrations/github-authentication.md"
+---
+
+# Task 09: End-To-End Coverage And Public Docs
+
+## Inputs
+
+- Every spec scenario.
+- Task 07 mock controls and Task 08 user interface.
+- `docs/public/integrations.md`, `docs/public/configuration.md`, E2E and docs-maintainer skills.
+
+## Acceptance
+
+- Playwright covers cross-workspace isolation, legacy/new migration, CLI/PAT selection, App install
+  callback validation, App-only/personal behavior, capabilities, suspension/revocation, and
+  disconnect/reconnect on desktop and mobile.
+- Screenshots confirm both identity sections and all status/action text fit without overlap at the
+  supported viewports.
+- Public docs explain local and hosted setup, App permissions/events, actor semantics, migration,
+  callback/webhook configuration, secret files, and recovery without exposing example live secrets.
+
+## Files Likely Touched
+
+- `apps/web/e2e/tests/integrations/github-workspace-settings.spec.ts`
+- `apps/web/e2e/tests/integrations/github-authentication.spec.ts` (new)
+- `apps/web/e2e/helpers/api-client.ts`
+- `docs/public/integrations.md`
+- `docs/public/configuration.md`
+- `apps/backend/internal/integrations/AGENTS.md` only if the shared integration pattern changes
+- `apps/web/AGENTS.md` only if frontend conventions change
+
+## Verification
+
+```bash
+cd apps/web && rtk pnpm exec playwright test --config e2e/playwright.config.ts e2e/tests/integrations/github-authentication.spec.ts --project=chromium
+cd apps/web && rtk pnpm exec playwright test --config e2e/playwright.config.ts e2e/tests/integrations/mobile-github-auth-settings.spec.ts --project=mobile-chrome
+```
+
+Also validate every documented environment variable against the typed config and inspect the
+captured desktop/mobile screenshots.
+
+Completed on 2026-07-19. The desktop suite passed four scenarios and the dedicated mobile suite
+passed two scenarios. Captures for App suspension, personal revocation, permission gaps, and narrow
+viewport layout were inspected; controls and the fixed Config Chat action do not overlap. Public
+configuration and integration docs were validated against the typed config. The organization App
+installation, OAuth exchange, and webhook round trip still require a deployed staging instance
+with real GitHub credentials.
+
+## Output Contract
+
+Report scenario coverage, screenshots inspected, documentation/config cross-check, tests run, files
+touched, blockers, and any platform flows requiring a real GitHub App staging check.