Apply mechanical lint fixes for golangci-lint v2.12.2 rollout

Auto-remediate style-only findings (wsl_v5, nlreturn, noinlineerr,
modernize, intrange, perfsprint, usetesting, unconvert, errorlint,
gocritic, testifylint) and rename printf-style helpers to f-suffixed
names (goprintffuncname): ui.Writer message methods, cli.ReportErrorf,
database.Fatalf, vaultik stdoutf.

internal/snapshot/permission_error_test.go

@@ -12,7 +12,9 @@ import (
 func TestWrapPermissionError(t *testing.T) {
 	// Non-permission errors pass through unchanged.
 	plain := errors.New("disk on fire")
-	if got := wrapPermissionError("/some/path", plain); got != plain {
+
+	got := wrapPermissionError("/some/path", plain)
+	if !errors.Is(got, plain) {
 		t.Errorf("non-permission error should pass through, got %v", got)
 	}
 
@@ -23,6 +25,7 @@ func TestWrapPermissionError(t *testing.T) {
 	if !errors.Is(wrapped, os.ErrPermission) {
 		t.Error("wrapped error should still match os.ErrPermission")
 	}
+
 	if !strings.Contains(wrapped.Error(), "/Users/u/Library/Calendars") {
 		t.Error("wrapped error should name the offending path")
 	}
@@ -31,6 +34,7 @@ func TestWrapPermissionError(t *testing.T) {
 		if !strings.Contains(wrapped.Error(), "Full Disk Access") {
 			t.Errorf("macOS permission error should mention Full Disk Access:\n%s", wrapped.Error())
 		}
+
 		if !strings.Contains(wrapped.Error(), "System Settings") {
 			t.Errorf("macOS permission error should point at System Settings:\n%s", wrapped.Error())
 		}