T1.2: Create src/platform/winproc; move configureHiddenWindow

Extract the hidden-window logic out of src/core runner and autostart files
into a new platform/winproc package with per-OS build-tag files. All call
sites updated to use winproc.ConfigureHiddenWindow. Builds clean on both
Windows and Linux; all tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docs/REFACTORING.md

@@ -245,7 +245,7 @@ Track progress here. Mark tasks complete as they land and pass review.
 
 ### Phase 1 — Split flat `core` package
 - [x] T1.1 — Create `src/domain`; move Job/RunRecord/Config/etc
-- [ ] T1.2 — Create `src/platform/winproc`; move `configureHiddenWindow`
+- [x] T1.2 — Create `src/platform/winproc`; move `configureHiddenWindow`
 - [ ] T1.3 — Create `src/runner`; move runner logic
 - [ ] T1.4 — Create `src/scheduler`; move scheduler
 - [ ] T1.5 — Create `src/storage`; move store/paths

src/core/autostart_windows.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
+	"gitea.mixdep.ru/mix/gosentry/src/platform/winproc"
 )
 
 const autostartName = "GoSentry"
@@ -107,7 +108,7 @@ func createStartupShortcut(shortcutPath string, executablePath string, iconPath
 		"GOSENTRY_WORKING_DIRECTORY="+workingDirectory,
 		"GOSENTRY_ICON_PATH="+iconPath,
 	)
-	configureHiddenWindow(command)
+	winproc.ConfigureHiddenWindow(command)
 	if output, err := command.CombinedOutput(); err != nil {
 		return fmt.Errorf("create startup shortcut: %w: %s", err, strings.TrimSpace(string(output)))
 	}
@@ -125,7 +126,7 @@ func readShortcut(shortcutPath string) (string, string, error) {
 	script := `[Console]::OutputEncoding = New-Object System.Text.UTF8Encoding($false); $shell = New-Object -ComObject WScript.Shell; $shortcut = $shell.CreateShortcut($env:GOSENTRY_SHORTCUT_PATH); [Console]::Out.Write($shortcut.TargetPath + [Environment]::NewLine + $shortcut.Arguments)`
 	command := exec.Command("powershell.exe", "-NoProfile", "-NonInteractive", "-ExecutionPolicy", "Bypass", "-Command", script)
 	command.Env = append(os.Environ(), "GOSENTRY_SHORTCUT_PATH="+shortcutPath)
-	configureHiddenWindow(command)
+	winproc.ConfigureHiddenWindow(command)
 	output, err := command.CombinedOutput()
 	if err != nil {
 		return "", "", fmt.Errorf("read startup shortcut: %w: %s", err, strings.TrimSpace(string(output)))
@@ -155,7 +156,7 @@ func removeIfExists(path string) error {
 func cleanupLegacyRegistryAutostart() error {
 	for _, name := range []string{legacyAutostartName, autostartName} {
 		command := exec.Command("reg.exe", "delete", `HKCU\Software\Microsoft\Windows\CurrentVersion\Run`, "/v", name, "/f")
-		configureHiddenWindow(command)
+		winproc.ConfigureHiddenWindow(command)
 		_ = command.Run()
 	}
 	return nil
@@ -164,7 +165,7 @@ func cleanupLegacyRegistryAutostart() error {
 func legacyRegistryAutostartExists() bool {
 	for _, name := range []string{legacyAutostartName, autostartName} {
 		command := exec.Command("reg.exe", "query", `HKCU\Software\Microsoft\Windows\CurrentVersion\Run`, "/v", name)
-		configureHiddenWindow(command)
+		winproc.ConfigureHiddenWindow(command)
 		if command.Run() == nil {
 			return true
 		}

src/core/runner.go

@@ -15,6 +15,7 @@ import (
 	"unicode"
 
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
+	"gitea.mixdep.ru/mix/gosentry/src/platform/winproc"
 )
 
 const commandTimeout = 30 * time.Second
@@ -42,7 +43,7 @@ func RunJob(ctx context.Context, job *domain.Job, trigger string, logsDir string
 		command := invocation.command
 		command.WaitDelay = commandWaitDelay
 		if invocation.hideWindow {
-			configureHiddenWindow(command)
+			winproc.ConfigureHiddenWindow(command)
 		}
 		command.Stdout = &stdout
 		command.Stderr = &stderr
@@ -176,7 +177,7 @@ func sanitizeFileName(name string) string {
 func startJobOnly(invocation commandInvocation, job domain.Job, started time.Time) (string, string, string) {
 	command := invocation.command
 	if invocation.hideWindow {
-		configureHiddenWindow(command)
+		winproc.ConfigureHiddenWindow(command)
 	}
 	err := command.Start()
 	duration := time.Since(started).Round(time.Millisecond)

src/core/runner_other.go

@@ -13,8 +13,3 @@ func shellCommand(ctx context.Context, command string) *exec.Cmd {
 	return exec.CommandContext(ctx, "sh", "-c", command)
 }
 
-func configureHiddenWindow(command *exec.Cmd) {
-	// Non-Windows platforms do not create a new console window for sh -c from a
-	// desktop process in the same way Windows does, so no extra process attribute
-	// is required here.
-}

src/core/runner_test.go

@@ -10,6 +10,7 @@ import (
 	"time"
 
 	"gitea.mixdep.ru/mix/gosentry/src/domain"
+	"gitea.mixdep.ru/mix/gosentry/src/platform/winproc"
 )
 
 func TestRunJobLogFileAllHeaders(t *testing.T) {
@@ -377,7 +378,7 @@ func TestShellCommandHidesWindow(t *testing.T) {
 	if !invocation.hideWindow {
 		t.Fatal("shell command should request hidden startup window")
 	}
-	configureHiddenWindow(invocation.command)
+	winproc.ConfigureHiddenWindow(invocation.command)
 	if invocation.command.SysProcAttr == nil || !invocation.command.SysProcAttr.HideWindow {
 		t.Fatal("expected shell command to be hidden")
 	}
@@ -389,7 +390,7 @@ func TestShellCommandUsesWindowsSafeQuoting(t *testing.T) {
 	}
 
 	command := shellCommand(context.Background(), `"C:\Program Files\FreeFileSync\FreeFileSync.exe" "D:\Local\Programs\FreeFileSync\Jobs\Auto.ffs_batch"`)
-	configureHiddenWindow(command)
+	winproc.ConfigureHiddenWindow(command)
 
 	want := `cmd.exe /S /C ""C:\Program Files\FreeFileSync\FreeFileSync.exe" "D:\Local\Programs\FreeFileSync\Jobs\Auto.ffs_batch""`
 	if command.SysProcAttr == nil {

src/core/runner_windows.go

@@ -57,13 +57,3 @@ func startsWithWindowsRootedPath(command string) bool {
 		(command[2] == '\\' || command[2] == '/')
 }
 
-func configureHiddenWindow(command *exec.Cmd) {
-	// GoSentry is a GUI scheduler, so child commands should not flash a console
-	// window on Windows. CREATE_NO_WINDOW keeps cmd.exe and simple console tools
-	// quiet while stdout/stderr are still captured through pipes.
-	if command.SysProcAttr == nil {
-		command.SysProcAttr = &syscall.SysProcAttr{}
-	}
-	command.SysProcAttr.CreationFlags |= 0x08000000
-	command.SysProcAttr.HideWindow = true
-}

src/platform/winproc/winproc_other.go

@@ -0,0 +1,10 @@
+//go:build !windows
+
+package winproc
+
+import "os/exec"
+
+// ConfigureHiddenWindow is a no-op on non-Windows platforms: launching sh -c
+// from a desktop process does not create a new console window in the same way
+// Windows does.
+func ConfigureHiddenWindow(command *exec.Cmd) {}

src/platform/winproc/winproc_windows.go

@@ -0,0 +1,18 @@
+package winproc
+
+import (
+	"os/exec"
+	"syscall"
+)
+
+// ConfigureHiddenWindow suppresses the console window that Windows would
+// otherwise flash when running a child process from a GUI application.
+// CREATE_NO_WINDOW keeps cmd.exe and simple console tools quiet while
+// stdout/stderr are still captured through pipes.
+func ConfigureHiddenWindow(command *exec.Cmd) {
+	if command.SysProcAttr == nil {
+		command.SysProcAttr = &syscall.SysProcAttr{}
+	}
+	command.SysProcAttr.CreationFlags |= 0x08000000
+	command.SysProcAttr.HideWindow = true
+}