feat(tmux-subagent): add event handlers for session lifecycle

src/features/tmux-subagent/cleanup.ts

@@ -0,0 +1,48 @@
+import type { TmuxConfig } from "../../config/schema"
+import { log } from "../../shared"
+import type { TrackedSession } from "./types"
+import { queryWindowState } from "./pane-state-querier"
+import { executeAction } from "./action-executor"
+
+export async function cleanupTmuxSessions(params: {
+  tmuxConfig: TmuxConfig
+  directory: string
+  serverUrl: string
+  sourcePaneId: string | undefined
+  sessions: Map<string, TrackedSession>
+  stopPolling: () => void
+}): Promise<void> {
+  params.stopPolling()
+
+  if (params.sessions.size === 0) {
+    log("[tmux-session-manager] cleanup complete")
+    return
+  }
+
+  log("[tmux-session-manager] closing all panes", { count: params.sessions.size })
+  const state = params.sourcePaneId ? await queryWindowState(params.sourcePaneId) : null
+
+  if (state) {
+    const closePromises = Array.from(params.sessions.values()).map((tracked) =>
+      executeAction(
+        { type: "close", paneId: tracked.paneId, sessionId: tracked.sessionId },
+        {
+          config: params.tmuxConfig,
+          directory: params.directory,
+          serverUrl: params.serverUrl,
+          windowState: state,
+        },
+      ).catch((error) =>
+        log("[tmux-session-manager] cleanup error for pane", {
+          paneId: tracked.paneId,
+          error: String(error),
+        }),
+      ),
+    )
+
+    await Promise.all(closePromises)
+  }
+
+  params.sessions.clear()
+  log("[tmux-session-manager] cleanup complete")
+}