Add eräkohtaiset tiedot to dog Kokeet laaja page

[asku1990]

Summary

Add expandable LT / eräkohtaiset tiedot to the dog-specific Kokeet laaja page.

Scope

• Add expandable inline LT / eräkohtaiset tiedot for each dog trial row.
• Reuse TrialEra / TrialEraLisatieto data.
• Match v1 intent from kokeet.php and bealt*.php, but use modern inline expansion instead of popups.
• Handle rule-window-specific labels/fields.

Acceptance criteria

• Dog Kokeet laaja can show eräkohtaiset tiedot per trial row.
• Rows display era-level summary values correctly.
• Entries without era data still render cleanly.
• Rule-window-specific labels/fields are handled.
• Behavior is dog-specific, not event-specific.

v1 reference

• /Users/akikuivas/personal-projects/beagle/beagleAppV1/kokeet.php
• /Users/akikuivas/personal-projects/beagle/beagleAppV1/bealt0.php
• /Users/akikuivas/personal-projects/beagle/beagleAppV1/bealt1.php
• /Users/akikuivas/personal-projects/beagle/beagleAppV1/bealt2.php
• /Users/akikuivas/personal-projects/beagle/beagleAppV1/bealt3.php