fix(sync): prevent race condition when adding new subscriptions

When a pullAllSessions was already running, the reloadTimer triggered
by adding sessions would be skipped by the source-level concurrency
lock, causing newly added sessions to wait until the next scheduled
interval (up to 60 minutes) before syncing.

Fix: trigger individual per-session pulls via triggerPull(sourceId,
sessionId) which bypasses the source-level lock, ensuring immediate
sync for newly added sessions regardless of concurrent pulls.

Also includes: connection pre-check on data source add, removal of
duplicate "browse remote sessions" button, hiding "other" session
types, and full resync fix for deleted local sessions.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/cli/src/sync/adapters.ts

@@ -77,6 +77,11 @@ export class DirectImporter implements DataImporter {
       return this.incrementalImportFile(targetSessionId, tempFile)
     }
 
+    if (targetSessionId) {
+      this.logger.info(`[DirectImporter] Session ${targetSessionId} not found locally, need full resync`)
+      return { success: false, newMessageCount: 0, needFullResync: true }
+    }
+
     return this.fullImportFile(tempFile, externalId)
   }
 

apps/cli/src/sync/routes.ts

@@ -77,6 +77,9 @@ export function registerAutomationRoutes(server: FastifyInstance, ctx: SyncRoute
       return reply.code(404).send({ error: 'Data source not found' })
     }
     reloadTimer(request.params.id, true)
+    for (const sess of added) {
+      pullEngine.triggerPull(request.params.id, sess.id).catch(() => {})
+    }
     return added
   })