fix(jetbrains): prune deleted sessions in the merged activity snapshot

.changeset/jetbrains-deleted-session-badge.md

@@ -0,0 +1,5 @@
+---
+"@kilocode/kilo-jetbrains": patch
+---
+
+Stop showing a running badge for a session that was just deleted.

packages/kilo-jetbrains/frontend/src/main/kotlin/ai/kilocode/client/app/KiloSessionService.kt

@@ -124,10 +124,14 @@ class KiloSessionService internal constructor(
      * Per-session activity for history and session lists. [activity] is the richer source — it also
      * carries waiting and failed sessions, and it covers sessions that are not open — but it drops
      * sessions whose directory the backend cannot resolve, so the busy statuses stay as a fallback.
+     *
+     * [statuses] and [activity] prune [removed] through separate collectors, so one can still carry
+     * a deleted session while the other has already dropped it. Subtracting [removed] here keeps the
+     * merged snapshot consistent instead of briefly badging a deleted session as running.
      */
     internal fun activitySnapshot(): Map<String, SessionActivityKind> {
         val busy = statuses.value.filterValues { it.type == "busy" }.mapValues { SessionActivityKind.RUNNING }
-        return busy + activity.value.mapValues { it.value.kind.toKind() }
+        return (busy + activity.value.mapValues { it.value.kind.toKind() }) - removed.value
     }
 
     suspend fun list(dir: String): SessionListDto {

packages/kilo-jetbrains/frontend/src/test/kotlin/ai/kilocode/client/app/KiloSessionServiceTest.kt

@@ -151,7 +151,9 @@ class KiloSessionServiceTest : BasePlatformTestCase() {
             "ses_failed" to SessionActivityDto("/repo/wt", SessionActivityKindDto.ERROR),
             "ses_asking" to SessionActivityDto("/repo/wt", SessionActivityKindDto.QUESTION),
         )
-        service.activity.first { it.isNotEmpty() }
+        // Both maps feed the snapshot through separate collectors, so wait for each one.
+        service.statuses.first { it.isNotEmpty() }
+        service.activity.first { it.size == 2 }
 
         assertEquals(
             mapOf(