fix(bonfire): strip control characters from error blocks, process views and tables

- bonfire.Sanitize (additive), moved from diary's console channel: tab
  kept, CR and LF to a space, every other control character dropped
- applied before styling to every error-block line (message,
  explanation, Try lines, -v chain), process-view item names and errors,
  the current item of spinner and progress, failure lines, and table
  headers and cells in both layouts
- diary's console handler calls bonfire.Sanitize; README and the
  writing-commands page say so (WR-05)

modules/diary/console.go

@@ -12,7 +12,6 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
-	"unicode"
 
 	"charm.land/lipgloss/v2"
 	"git.golem15.com/golem15/summercms/modules/bonfire"
@@ -141,12 +140,12 @@ func (h *consoleHandler) Handle(ctx context.Context, r slog.Record) error {
 	label, style := levelLabel(r.Level, p)
 	b.WriteString(style.Render(label))
 	b.WriteString(strings.Repeat(" ", max(0, 5-len(label))+1))
-	name := sanitize(component)
+	name := bonfire.Sanitize(component)
 	if name != "" {
 		b.WriteString(p.Header.Render(name))
 	}
 	b.WriteString(strings.Repeat(" ", max(0, componentWidth-len(name))+1))
-	b.WriteString(sanitize(r.Message))
+	b.WriteString(bonfire.Sanitize(r.Message))
 	for _, list := range [][]consoleAttr{h.attrs, recAttrs} {
 		for _, a := range list {
 			b.WriteByte(' ')
@@ -247,7 +246,7 @@ func appendAttr(out []consoleAttr, prefix string, a slog.Attr) []consoleAttr {
 		}
 		return out
 	}
-	return append(out, consoleAttr{key: sanitize(prefix + a.Key), value: formatValue(a.Value)})
+	return append(out, consoleAttr{key: bonfire.Sanitize(prefix + a.Key), value: formatValue(a.Value)})
 }
 
 func formatValue(v slog.Value) string {
@@ -266,35 +265,9 @@ func formatValue(v slog.Value) string {
 	default:
 		s = v.String()
 	}
-	s = sanitize(s)
+	s = bonfire.Sanitize(s)
 	if s == "" || strings.ContainsAny(s, " \t\"=") {
 		return strconv.Quote(s)
 	}
 	return s
 }
-
-// sanitize removes control characters other than tab; line breaks become
-// spaces so a multi-line value stays on one line.
-func sanitize(s string) string {
-	clean := true
-	for _, r := range s {
-		if r != '\t' && unicode.IsControl(r) {
-			clean = false
-			break
-		}
-	}
-	if clean {
-		return s
-	}
-	var b strings.Builder
-	for _, r := range s {
-		switch {
-		case r == '\n' || r == '\r':
-			b.WriteByte(' ')
-		case r != '\t' && unicode.IsControl(r):
-		default:
-			b.WriteRune(r)
-		}
-	}
-	return b.String()
-}