test(backend): add integration coverage for the admin analytics dashb…

[egwujiohaifesinachiperpetual-max]

Closes #1161

Description

This PR adds comprehensive integration test coverage for the admin analytics dashboard route (GET /api/admin/analytics).

Fixes / Closes StellerCraft/craft — Engineer Integration Test Coverage for the Admin Analytics Dashboard Route.

Changes Made

• Added apps/backend/src/app/api/admin/analytics/admin-analytics.integration.test.ts
• Covered the following test scenarios:
  • Unauthenticated rejection path (401): Missing session/user or auth error from Supabase.
  • Forbidden role rejection path (403): Authenticated users without admin privileges (non-matching user_metadata.role and absent from ADMIN_USER_IDS allowlist fallback).
  • Admin-authorized success path (200): Proper metric aggregation, totals calculation, and payload structure for both user_metadata.role === 'admin' and ADMIN_USER_IDS allowlist fallback.
  • Query parameters: Verification that metricType, startDate, and endDate query parameters are mapped to corresponding query filters.
  • Database error path (500): Proper error handling and error response formatting when Supabase query fails.

Verification

• Ran npm run test --workspace=@craft/backend -- admin/analytics (9/9 tests passed).
• Ran ESLint on apps/backend/src/app/api/admin/analytics/ with 0 warnings or errors.

Review Request

Requesting review from maintainers before merging.

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