blank session cleanup improvements

- make the blank session cleanup system optionally fetch full message histories for each session to better judge if it's blank
- make a command that does the deep clean, keep the clean that happens on new session creation shallow

packages/ui/src/stores/session-api.ts

@@ -407,27 +407,6 @@ async function deleteSession(instanceId: string, sessionId: string): Promise<voi
   }
 }
 
-async function cleanupBlankSessions(instanceId: string, excludeSessionId?: string): Promise<void> {
-  const instanceSessions = sessions().get(instanceId)
-  if (!instanceSessions) return
-
-  const deletionPromises: Promise<void>[] = []
-
-  for (const [sessionId, session] of instanceSessions) {
-    if (sessionId === excludeSessionId) continue
-    if (!isBlankSession(session, instanceId)) continue
-
-    deletionPromises.push(deleteSession(instanceId, sessionId).catch((error) => {
-      console.error(`Failed to delete blank session ${sessionId}:`, error)
-    }))
-  }
-
-  if (deletionPromises.length > 0) {
-    console.log(`Cleaning up ${deletionPromises.length} blank sessions`)
-    await Promise.all(deletionPromises)
-  }
-}
-
 async function fetchAgents(instanceId: string): Promise<void> {
   const instance = instances().get(instanceId)
   if (!instance || !instance.client) {