Terminate resize notification when Loop exits

- Pass Loop context to notifyOnResize
- Windows: stop polling goroutine, close CONOUT$ handle on ctx.Done
- Unix: unregister SIGWINCH handler on ctx.Done

src/terminal.go

@@ -6199,7 +6199,7 @@ func (t *Terminal) Loop() error {
 
 		if !t.tui.ShouldEmitResizeEvent() {
 			resizeChan := make(chan os.Signal, 1)
-			notifyOnResize(resizeChan) // Non-portable
+			notifyOnResize(ctx, resizeChan) // Non-portable
 			go func() {
 				for {
 					select {

src/terminal_unix.go

@@ -3,6 +3,7 @@
 package fzf
 
 import (
+	"context"
 	"os"
 	"os/signal"
 	"syscall"
@@ -10,8 +11,12 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func notifyOnResize(resizeChan chan<- os.Signal) {
+func notifyOnResize(ctx context.Context, resizeChan chan<- os.Signal) {
 	signal.Notify(resizeChan, syscall.SIGWINCH)
+	go func() {
+		<-ctx.Done()
+		signal.Stop(resizeChan)
+	}()
 }
 
 func notifyStop(p *os.Process) {

src/terminal_windows.go

@@ -3,6 +3,7 @@
 package fzf
 
 import (
+	"context"
 	"os"
 	"syscall"
 	"time"
@@ -19,19 +20,27 @@ func (resizeSignal) Signal()        {}
 
 // Windows has no SIGWINCH, so poll the console screen buffer for window
 // size changes instead.
-func notifyOnResize(resizeChan chan<- os.Signal) {
+func notifyOnResize(ctx context.Context, resizeChan chan<- os.Signal) {
 	consoleOut, err := syscall.Open("CONOUT$", syscall.O_RDWR, 0)
 	if err != nil {
 		return
 	}
 	var info windows.ConsoleScreenBufferInfo
 	if windows.GetConsoleScreenBufferInfo(windows.Handle(consoleOut), &info) != nil {
+		syscall.Close(consoleOut)
 		return
 	}
 	last := info.Window
 	go func() {
+		defer syscall.Close(consoleOut)
+		ticker := time.NewTicker(resizePollInterval)
+		defer ticker.Stop()
 		for {
-			time.Sleep(resizePollInterval)
+			select {
+			case <-ctx.Done():
+				return
+			case <-ticker.C:
+			}
 			if windows.GetConsoleScreenBufferInfo(windows.Handle(consoleOut), &info) != nil {
 				continue
 			}