Improve team resource route handling

[andrasbacsai]

Summary

• replace route resource lookup conditionals with a compact model map
• use target-team role checks for team-level operations
• add focused coverage for route and team behavior

Tests

• vendor/bin/pint --dirty --format agent
• php artisan test --compact tests/Unit/Policies/TeamPolicyTest.php
• php -l app/Http/Middleware/CanUpdateResource.php
• php -l app/Policies/TeamPolicy.php