Add award notice recipient and send-path regression coverage

[cursor]

Risky behavior now covered

• ContestInstance#award_notice_entries recipient selection: winners, finalists, and prize-only entries are included; plain unawarded and soft-deleted winners are excluded.
• send_award_notices empty cohort: alerts and does not queue mail or bump award_emails_sent_count.
• include_amounts preference: '0' queues notices with amounts omitted.
• award_email_preferences loads the same recipient set for the preview screen.

Test files added/updated

• spec/models/contest_instance_spec.rb — #award_notice_entries inclusion/exclusion
• spec/controllers/contest_instances_controller_spec.rb — send/preferences edge cases

Why these tests materially reduce regression risk

Award notices email applicants based on status and assigned prizes. Prior coverage only exercised the happy-path send. A regression in Entry.awarded merge logic or the empty-cohort guard could email the wrong people, skip winners, or silently no-op without a clear alert.

Validation

bundle exec rspec on the touched describe blocks: 10 examples, 0 failures.

  

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Note

Low Risk
Test-only changes; behavior under test is unchanged and risk is limited to spec maintenance.

Overview
Adds regression specs only—no application code changes.

Model: New examples for ContestInstance#award_notice_entries assert winners, finalists, and prize-assigned entries are included, while plain unawarded entries and soft-deleted winners are excluded.

Controller: Extends the existing award-notices examples to cover POST send_award_notices with include_amounts: '0' (mailer called with include_amounts: false), the no-recipients path (flash alert, no mail, award_emails_sent_count unchanged), and GET award_email_preferences assigning @award_notice_entries for the preview screen.

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(requestId: serverGenReqId_bff7242b-3ba9-45fe-ba65-cfa6b9681b30)

[Copilot]

Copilot review overview

🔵 Needs a closer look

The preview test does not assert the exact recipient cohort, leaving incorrect assignments undetected.

Review effort: Lite
Findings: None

What changed in this PR

Adds regression coverage for award-notice recipient selection and controller send/preview edge cases.

Changes:

• Tests recipient inclusion and exclusion rules.
• Covers amount preferences and empty cohorts.
• Verifies preview recipient loading.

File	Description
spec/​models/​contest_instance_spec.rb	Covers award recipient selection.
spec/​controllers/​contest_instances_controller_spec.rb	Covers sending and preference-screen behavior.

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