Add photo station management UI

[noobydp]

Summary

This adds the first frontend surface for managing reusable photo stations. Users can now see saved stations from the main dashboard, rename or delete them, and open a dedicated station corner editor to adjust the saved paper corners.

The PR includes:

• station cards on the main dashboard
• rename and delete actions for stations
• a station corner editing page
• frontend API helpers for station CRUD operations
• frontend types for station data and paper-size handling
• dashboard navigation affordances for saved station workflows

Implementation Notes

This PR depends on the backend station APIs from the previous PR.

The management UI is intentionally separate from the capture/reuse flow so reviewers can validate the station data model and station management surface before reviewing the larger trace workflow changes.

The station corner editor reuses the existing paper-corner editing interaction model where possible, instead of introducing a separate editor pattern. Paper size values are shared through the existing PaperSize type so A4, Letter, A3, and Tabloid stay consistent across backend and frontend.

Tests

• corepack pnpm@10.29.2 --dir frontend lint
• corepack pnpm@10.29.2 --dir frontend exec tsc --noEmit

Code and PR drafted with Codex

[noobydp]

Closed because this draft was created in the fork by mistake. Recreated against tracefinity/tracefinity as tracefinity#136.