v0.15.0

Changed

• Upgrade supported Go versions to 1.25 and 1.26, and update CI accordingly. PR #508.
• Upgrade River to v0.31.0 and River Pro to v0.22.0. PR #511.
• Numerous dependency upgrades.

Fixed

• Prevent double slash in URLs for root path prefix. Thanks Jan Kott! PR #487.
• Serve UI HTML for wildcard or missing Accept headers and return 406 for explicit non-HTML requests. Fixes #485. PR #493.
• Prevent jobs detail navigation from bouncing back to /jobs/ on slow networks due to stale filter-sync URL updates. Fixes #495. PR #504.
• Workflow detail: improve dependency edge routing to avoid turns under task cards, avoid line segments crossing node bodies, and keep fan-in edges visually converged into shared merge lanes when possible. PR #507.