Add anchor-based deep linking and smooth scroll support to /cars Fleet Timeline

[justin-phxm]

Summary

Enable deep-linking for individual cars in the Fleet Timeline on /cars so users can navigate directly to a specific entry via URL hash and get smooth animated scrolling to the target card.

Problem

The Fleet Timeline currently does not fully support anchor-based navigation. Visiting a URL like /cars#schulich-elysia should reliably scroll to that car's timeline card, but this behavior is not implemented.

Proposed solution

• Add stable anchor identifiers for each fleet timeline item (based on car ID and/or normalized car name).
• Update timeline interactions so selecting/clicking a car updates the URL hash without a full page reload.
• On page load (and hash changes), detect the hash and scroll to the matching timeline item.
• Use smooth scroll animation for anchor navigation.
• Ensure behavior works for direct navigation (opening URL in new tab), refreshes, and back/forward browser navigation.

Acceptance criteria

• Navigating to /cars#<carID-or-name> scrolls to the matching car timeline entry.
• Scroll behavior is smooth and visually consistent with current site animations.
• Clicking/selecting a timeline item updates the URL hash correctly.
• If no matching anchor exists, page behavior fails gracefully (no crash; optional fallback to top/default state).
• Works across modern desktop and mobile browsers.

Notes