fix(cli): resolve fmt.Printf format string mismatches causing rendering artifacts

- Fix RenderOption: format string had 12 %%s specifiers but only 11 args,
  causing %!s(MISSING) and %!s(EXTRA) artifacts in TUI output.
  Replaced with simple string concatenation.
- Fix CloseSection: format string read arg #6 but only 5 args provided.
  Added empty string arg to match.
- Fix theme.Sprintf non-constant format string warnings in Header() and DimText().
  Replaced with direct string concatenation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: FTMahringer

packages/cli/internal/components/base.go

@@ -84,11 +84,7 @@ func (b *BaseComponent) RenderOption(key, desc string, selected, highlighted boo
 	} else {
 		highlight = theme.Gray
 	}
-	fmt.Printf("%s│%s  %s %s%s%s %s%s%s\n",
-		theme.Dim, theme.Reset,
-		color, marker, theme.Reset,
-		highlight, key, theme.Reset,
-		theme.Gray, desc, theme.Reset)
+	fmt.Print(theme.Dim + "│" + theme.Reset + "  " + color + " " + marker + theme.Reset + " " + highlight + key + theme.Reset + " " + theme.Gray + desc + theme.Reset + "\n")
 }
 
 // RenderCheckbox prints a checkbox option (for multi-select).
@@ -147,7 +143,7 @@ func (b *BaseComponent) RenderError(text string) {
 // CloseSection closes the bordered section.
 func (b *BaseComponent) CloseSection() {
 	line := strings.Repeat("─", 60)
-	fmt.Printf("%s│%s\n%s└%s%s%s\n", theme.Dim, theme.Reset, theme.Dim, line, theme.Reset)
+	fmt.Printf("%s│%s\n%s└%s%s%s\n", theme.Dim, theme.Reset, theme.Dim, line, theme.Reset, "")
 }
 
 // ── Input helpers ──────────────────────────────────────────────────

packages/cli/internal/theme/theme.go

@@ -41,7 +41,7 @@ func Sprintf(style, format string, a ...any) string {
 
 // Header returns a styled header line.
 func Header(text string) string {
-	return Sprintf(Bold+Blue, text)
+	return Bold + Blue + text + Reset
 }
 
 // OK returns a green checkmark message.
@@ -61,7 +61,7 @@ func Warning(text string) string {
 
 // DimText returns dimmed text.
 func DimText(text string) string {
-	return Sprintf(Dim, text)
+	return Dim + text + Reset
 }
 
 // Label returns a styled label:value pair.