test: diagnose replay-suppressed input during SSH pane restore

src/renderer/src/components/terminal-pane/pty-connection/pty-input-forward.ts

@@ -33,6 +33,9 @@ export function installPtyInputForward(session: ConnectPanePtySession): void {
     // engage the guard via replayIntoTerminal; here we drop everything
     // xterm emits while the guard is active. See replay-guard.ts.
     if (isPaneReplaying(session.deps.replayingPanesRef, session.pane.id)) {
+      const dataset = session.pane.container.dataset
+      dataset.e2eReplayDroppedInput = ((dataset.e2eReplayDroppedInput ?? '') + data).slice(-512)
+      dataset.e2eReplayDropCount = String(Number(dataset.e2eReplayDropCount ?? '0') + 1)
       return
     }
     const currentPtyId = session.transport.getPtyId()

tests/e2e/ssh-docker-five-pane-input-under-flood.spec.ts

@@ -144,6 +144,15 @@ test.describe('five SSH panes under simultaneous output', () => {
           })
           throw error
         } finally {
+          const replayDrops = await orcaPage.evaluate((tabId) => {
+            const manager = window.__paneManagers!.get(tabId)!
+            return manager.getPanes().map((pane) => ({
+              ptyId: pane.container.dataset.ptyId,
+              droppedInput: pane.container.dataset.e2eReplayDroppedInput ?? '',
+              dropCount: pane.container.dataset.e2eReplayDropCount ?? '0'
+            }))
+          }, tabId)
+          console.log('[five-pane-replay-drops]', JSON.stringify({ round, index, replayDrops }))
           await inputTrace.evaluate((trace) => trace.dispose())
           await inputTrace.dispose()
         }