Initial commit: raceplanner project scaffold

openspec/changes/new-raceplanner-app/specs/announcements/spec.md

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+## ADDED Requirements
+
+### Requirement: Event announcements
+The system SHALL allow organizers to post announcements for their events.
+
+#### Scenario: Create announcement
+- **WHEN** organizer creates announcement with title and content
+- **THEN** system saves announcement with timestamp
+- **AND** associates with specific event
+
+#### Scenario: Announcement visibility
+- **WHEN** participant views event page
+- **THEN** system displays all published announcements
+- **AND** sorts by newest first
+
+### Requirement: Announcement notifications
+The system SHALL notify registered participants of new announcements.
+
+#### Scenario: New announcement notification
+- **WHEN** organizer publishes announcement
+- **THEN** system sends notification to all registered participants
+- **AND** includes announcement title and link
+
+#### Scenario: Mark as read
+- **WHEN** participant views announcement
+- **THEN** system marks notification as read
+
+### Requirement: Announcement management
+The system SHALL allow organizers to edit and delete announcements.
+
+#### Scenario: Edit announcement
+- **WHEN** organizer edits existing announcement
+- **THEN** system updates content
+- **AND** shows edit timestamp
+
+#### Scenario: Delete announcement
+- **WHEN** organizer deletes announcement
+- **THEN** system removes from event
+- **AND** does not notify participants of deletion