Fix SAA DMI parser to match real DMI.txt format

Replace the guessed pipe/key=value parser with the correct format
documented in SAA User Guide 4.8.1:

  [Section]
  Item Name   {SHN}  = "value"   // comment

Handles string values (strips surrounding quotes), non-string values
(UUID, hex), section headers for display names, version line, and
// comments. Verified against the SAA 1.5.0 User Guide sample.

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

audit/internal/webui/saa_dmi.go

@@ -24,42 +24,56 @@ type saaChange struct {
 	Value string `json:"value"`
 }
 
-var shnRE = regexp.MustCompile(`^[A-Za-z0-9_]{1,16}$`)
+var (
+	shnRE        = regexp.MustCompile(`^[A-Za-z0-9_]{1,16}$`)
+	dmiSectionRE = regexp.MustCompile(`^\[(.+?)\]$`)
+	// Item Name   {SHN}   = value   // comment
+	dmiItemRE    = regexp.MustCompile(`^(.+?)\s+\{([A-Za-z0-9]{1,16})\}\s*=\s*(.*)$`)
+	dmiVersionRE = regexp.MustCompile(`(?i)^version\s*=`)
+)
 
 // parseDMIFile parses the DMI.txt produced by "saa GetDmiInfo".
-// Supports two formats:
-//   - Name|Shn|Value  (pipe-separated, primary)
-//   - Shn=Value       (key=value fallback)
+// Real format (from SAA User Guide 4.8.1):
 //
-// Lines starting with '#', empty lines, "version=..." and section headers are skipped.
+//	[System]
+//	Version         {SYVS} = "A Version"   // string value
+//	Serial Number   {SYSN} = $DEFAULT$     // string value
+//	UUID            {SYUU} = 00112233-...  // hex value
 func parseDMIFile(content string) []dmiField {
 	var fields []dmiField
+	currentSection := ""
 	for _, line := range strings.Split(content, "\n") {
 		line = strings.TrimSpace(line)
-		if line == "" || strings.HasPrefix(line, "#") {
+		if line == "" || strings.HasPrefix(line, "//") || strings.HasPrefix(line, "#") {
 			continue
 		}
-		lower := strings.ToLower(line)
-		if strings.HasPrefix(lower, "version=") || strings.HasPrefix(lower, "[") {
+		if dmiVersionRE.MatchString(line) {
 			continue
 		}
-		parts := strings.SplitN(line, "|", 3)
-		if len(parts) == 3 {
-			name := strings.TrimSpace(parts[0])
-			shn := strings.TrimSpace(parts[1])
-			value := strings.TrimSpace(parts[2])
-			if shnRE.MatchString(shn) {
-				fields = append(fields, dmiField{Name: name, Shn: shn, Value: value})
-				continue
-			}
+		if m := dmiSectionRE.FindStringSubmatch(line); m != nil {
+			currentSection = strings.TrimSpace(m[1])
+			continue
 		}
-		if idx := strings.IndexByte(line, '='); idx > 0 {
-			shn := strings.TrimSpace(line[:idx])
-			value := strings.TrimSpace(line[idx+1:])
-			if shnRE.MatchString(shn) {
-				fields = append(fields, dmiField{Name: shn, Shn: shn, Value: value})
-			}
+		m := dmiItemRE.FindStringSubmatch(line)
+		if m == nil {
+			continue
 		}
+		itemName := strings.TrimSpace(m[1])
+		shn := m[2]
+		rawValue := strings.TrimSpace(m[3])
+		// strip trailing comment (space + //)
+		if idx := strings.LastIndex(rawValue, " //"); idx >= 0 {
+			rawValue = strings.TrimSpace(rawValue[:idx])
+		}
+		// strip surrounding double quotes from string values
+		if len(rawValue) >= 2 && rawValue[0] == '"' && rawValue[len(rawValue)-1] == '"' {
+			rawValue = rawValue[1 : len(rawValue)-1]
+		}
+		displayName := itemName
+		if currentSection != "" {
+			displayName = currentSection + " / " + itemName
+		}
+		fields = append(fields, dmiField{Name: displayName, Shn: shn, Value: rawValue})
 	}
 	return fields
 }