Feature: Add Navigation and Pages for Historical SymbiTech Events

[GenDelta]

Requirements

• Add UI near the lower part of the /symbitech page that lets users browse and navigate to previous SymbiTech events.
• Create a dedicated route for each historical event using /symbitech/<event_name>.
• Use the event name as the route slug; for example, the 2023 Laser Lock event must be available at /symbitech/laserlock.
• Each historical event page must include the event logo, a short introduction, and images from that event.
• Follow repository routing, component, and styling conventions while keeping the historical-event pages reusable.

Acceptance Criteria

• The /symbitech page provides a clear scroll-based UI for discovering previous SymbiTech events.
• Users can navigate from that UI to each available historical event page.
• Every historical event uses the /symbitech/<event_name> route format.
• The 2023 Laser Lock event is available at /symbitech/laserlock.
• Each historical event page displays its event logo, a short introduction, and event images.
• The navigation and historical pages are responsive and consistent with the site's existing design.
• The project builds successfully with all historical event routes enabled.

[GenDelta]

Dependency note: this issue blocks #107, “Feature: Build Historical SymbiTech Event Pages for 2023 and 2025”. The shared historical navigation and route structure should be completed before the event-specific pages are implemented.