refactor(web): extract apps page helpers

[thomasorgeval]

Summary

• Extracted repeated Apps page active-member role loading into a single helper.
• Extracted shared Connect App dialog configuration used by create and edit flows.
• Behavior is intended to be unchanged.

Expected impact

• Keeps the Apps page dialog setup and role refresh behavior in one place, reducing duplication and review surface for future tweaks.
• Makes create/edit dialog differences explicit while preserving their existing result handling.

Verification

• pnpm format:check apps/web/src/app/pages/apps/apps.page.ts
• pnpm nx typecheck web --skip-nx-cache --tui=false
• pnpm lint apps/web/src/app/pages/apps/apps.page.ts
• git diff --check main..HEAD