fix(admin): allow application and organization social provider setup

[SirNarsh]

Summary

• Omit control_login_enabled from application and organization provider PUT requests.
• Preserve the installation checkbox and the backend installation-only restriction.
• Cover Google, Apple, Microsoft, Facebook, and LinkedIn forms at all three scopes, including checked and unchecked installation flags.

Verification

• All 12 navigation Playwright tests passed, including three scope regressions.
• Admin typecheck, lint, and static build passed (existing image-element lint warning unchanged).
• No backend, API, database, or provider protocol changes.
• Live provider authentication and production deployment are not included in these local results.

[Copilot]

Copilot review overview

🟢 Approval recommended

The focused implementation matches backend scope restrictions and includes comprehensive regression coverage.

Review effort: Balanced
Findings: None

What changed in this PR

Fixes social-provider configuration at organization and application scopes by omitting the installation-only Platform login field.

Changes:

• Conditionally includes control_login_enabled only for installation requests.
• Adds Playwright coverage for five providers across all three scopes.

File	Description
web/​app/​page.tsx	Restricts the Platform login payload field to installation scope.
web/​e2e/​navigation.spec.ts	Verifies provider forms, endpoints, and payloads across scopes.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.