fix(terminal): resume output after recovery resync

src/renderer/src/runtime/remote-runtime-terminal-frame-drop-resync.test.ts

@@ -209,6 +209,9 @@ describe('remote terminal frame-drop resync', () => {
     expect(server.droppedFrames).toBe(1)
     // Instead, a fresh authoritative snapshot recovers the terminal.
     expect(snapshots).toEqual(['INITIAL', '\x1b[2J\x1b[3J\x1b[HRECOVERED'])
+
+    server.output('ddd')
+    expect(data).toEqual(['aaa', 'ddd'])
   })
 
   it('passes contiguous output straight through without resyncing', async () => {
@@ -352,5 +355,8 @@ describe('remote terminal frame-drop resync', () => {
     await expect(manualSnapshot).resolves.toMatchObject({ data: 'MANUAL' })
     expect(server.snapshotRequests).toHaveLength(2)
     expect(snapshots).toEqual(['INITIAL', '\x1b[2J\x1b[3J\x1b[HRECOVERED'])
+
+    server.output('ddd')
+    expect(data).toEqual(['aaa', 'ddd'])
   })
 })

src/renderer/src/runtime/remote-runtime-terminal-multiplexer.ts

@@ -605,15 +605,16 @@ class RemoteRuntimeTerminalMultiplexer {
         clearPendingSnapshotRequest(stream)
       }
       clearSnapshot(stream)
-      // Why: the snapshot is the new authoritative output high-water; align the
-      // gap detector to it and re-open the live path (used by both the initial
-      // snapshot and a frame-drop resync, which reuses the 'initial' target).
-      if (target === 'initial') {
+      // Why: initial and recovery snapshots are authoritative output
+      // high-waters; align the gap detector and re-open the live path.
+      if (target === 'initial' || target === 'recovery') {
         stream.expectedSeq = typeof info?.seq === 'number' ? info.seq : undefined
         stream.resyncInFlight = false
         stream.resyncPendingSend = false
-        stream.initialSnapshotReceived = true
-        stream.callbacks.onSubscribed?.()
+        if (target === 'initial') {
+          stream.initialSnapshotReceived = true
+          stream.callbacks.onSubscribed?.()
+        }
       } else {
         this.sendDeferredResyncSnapshot(stream)
       }