fix(shared): improve compaction marker and tmux server health

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/shared/tmux/tmux-utils/server-health.ts

@@ -58,4 +58,5 @@ export async function isServerRunning(serverUrl: string): Promise<boolean> {
 export function resetServerCheck(): void {
 	serverAvailable = null
 	serverCheckUrl = null
+	delete (globalThis as Record<symbol, boolean>)[SERVER_RUNNING_KEY]
 }