fix(jetbrains): map session times as doubles

[kirillk]

Summary

• Convert generated JetBrains session time integers to the shared DTO double shape.
• Fix the backend Kotlin compilation error surfaced by a clean JetBrains plugin build.

Validation

• ./gradlew clean buildPlugin

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (1 files)

• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/app/KiloBackendSessionManager.kt

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_{Reviewed by gpt-5.5-20260423 · 300,927 tokens}