[Release] Prepare full-screen intent declaration and justification

[jjoonleo]

Backlog ID: ISSUE-013
Source: plans/release_app_todos.md

Goal

Prepare Play Console review material for USE_FULL_SCREEN_INTENT.

Parallelization

Status: manual

Prerequisites

• Play Console access - Codex can prepare declaration text, but submission requires account access.

Acceptance criteria

• Confirm full-screen intent is used only for user-scheduled alarm/reminder moments.
• Document why OnTime qualifies as an alarm/reminder use case.
• Submit any required Play Console full-screen intent declaration.
• QA verifies full-screen UI is not used for promotional, generic, or low-priority notifications.

Codex thread guidance

• Work only on this issue's scope.
• Do not modify unrelated release issues.
• If this issue is blocked by external access or human approval, prepare the needed checklist/text and leave the issue open.
• Codex may prepare declaration wording, but Play Console submission requires account access.