webui/collector: strip ANSI escapes in nvidia-smi topo parsing, auto-prepare drives for RAID mirror creation

- nvidia-smi underlines the topo -m header with ANSI CSI codes even when
  writing to a file; both NVLink matrix parsers failed to find the header
  and /topo showed "No NVLink-bonded GPU pairs found" on bonded systems.
- raid-lsi-create-mirror failed with "resources already in use" (exit 11)
  on JBOD drives; the task now reads drive states and auto-converts
  JBOD/UBad (set good force), releases hotspares, refuses Frgn/Onln with
  actionable messages, and dumps preservedcache info when add vd fails.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

audit/internal/webui/page_topo.go

@@ -178,13 +178,18 @@ type gpuPairLink struct {
 
 var topoNVRe = regexp.MustCompile(`(?i)^NV(\d+)$`)
 
+// nvidia-smi underlines the topo -m header row with ANSI CSI sequences
+// (ESC[4m...ESC[0m) even when stdout is not a TTY, so the captured techdump
+// contains them and "GPU0" is not at the start of the trimmed header line.
+var topoANSIRe = regexp.MustCompile("\x1b\\[[0-9;]*[A-Za-z]")
+
 // parseGPUPairAdjacency returns every GPU pair with a nonzero NVLink bond
 // count from a "nvidia-smi topo -m" matrix. Unlike parseNVIDIATopologyMatrix
 // (collector package, aggregate-only: min/all-active/count), this returns
 // who is bonded to whom — required so GPU-GPU edges are drawn for actually
 // bonded pairs, not for adjacent boxes in the layout.
 func parseGPUPairAdjacency(raw string) []gpuPairLink {
-	lines := strings.Split(raw, "\n")
+	lines := strings.Split(topoANSIRe.ReplaceAllString(raw, ""), "\n")
 	headerIdx := -1
 	var gpuColIndices []int
 	for i, line := range lines {