Refactor JetBrains session state and delayed UI updates

[kirillk]

Refactor the JetBrains session UI around clearer controller/view boundaries and consolidate delayed UI transitions behind a reusable state-checked timer framework. This gives the session controller explicit state for view, connection, history, and recent-session loading, and provides a foundation for future delayed state-driven UI changes without coroutine jobs or ad hoc flags.

This also improves loading behavior by avoiding transient loading/empty-state flashes, updates retry to show connection loading immediately, and keeps connection recovery centralized with detailed startup, workspace, and config warning states.

Fixes #9441

Connection errors and local history demo

Screen.Recording.2026-04-28.at.6.40.15.PM.mp4

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (12 incremental files)

• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/app/KiloBackendAppService.kt
• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/rpc/KiloWorkspaceRpcApiImpl.kt
• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/workspace/KiloBackendWorkspace.kt
• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/workspace/KiloBackendWorkspaceManager.kt
• packages/kilo-jetbrains/backend/src/main/kotlin/ai/kilocode/backend/workspace/KiloWorkspaceState.kt
• packages/kilo-jetbrains/backend/src/test/kotlin/ai/kilocode/backend/workspace/KiloBackendWorkspaceTest.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/ui/ConnectionPanel.kt
• packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/session/update/SessionController.kt
• packages/kilo-jetbrains/frontend/src/main/resources/messages/KiloBundle.properties
• packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/session/ui/ConnectionPanelTest.kt
• packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/session/update/ConnectionDelayTest.kt
• packages/kilo-jetbrains/shared/src/main/kotlin/ai/kilocode/rpc/dto/KiloWorkspaceStateDto.kt

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_{Reviewed by gpt-5.5-2026-04-23 · 2,275,351 tokens}