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/collector/pcie_nvlink_bridge.go

@@ -12,6 +12,11 @@ import (
 
 var nv5re = 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 "GPU0" is not at the
+// start of the trimmed header line unless they are stripped first.
+var nvANSIRe = regexp.MustCompile("\x1b\\[[0-9;]*[A-Za-z]")
+
 // isNVLinkBridgeCandidate returns true for Mellanox PCIe devices that look like
 // NVLink bridge mezzanine cards: narrow link (x2), no host net interfaces.
 // These are the CPU-side PCIe control plane of the NVSwitch fabric on HGX/DGX systems.
@@ -163,7 +168,7 @@ func locateGPUTopologyColumns(lines []string) (headerIdx int, gpuColIndices []in
 // (NIC, CPU) which are ignored. Only GPU×GPU cells containing NV# values are
 // counted. X is self; non-NV tokens (NODE, SYS, PHB, PIX) are skipped.
 func parseNVIDIATopologyMatrix(raw string) nvlinkTopoResult {
-	lines := strings.Split(raw, "\n")
+	lines := strings.Split(nvANSIRe.ReplaceAllString(raw, ""), "\n")
 	headerIdx, gpuColIndices, gpuCount := locateGPUTopologyColumns(lines)
 	if headerIdx < 0 {
 		return nvlinkTopoResult{}

audit/internal/collector/pcie_nvlink_bridge_test.go

@@ -71,6 +71,25 @@ GPU1	NV0	 X
 	}
 }
 
+func TestParseNVIDIATopologyMatrixANSIUnderlinedHeader(t *testing.T) {
+	t.Parallel()
+
+	// nvidia-smi underlines the header row with ANSI escapes even when stdout
+	// is not a TTY: the header line starts with ESC[4m, not "GPU0".
+	input := "\x1b[4m\tGPU0\tGPU1\tNIC0\tCPU Affinity\x1b[0m\n" +
+		"GPU0\t X \tNV18\tNODE\t0-31,64-95\n" +
+		"GPU1\tNV18\t X \tNODE\t0-31,64-95\n" +
+		"NIC0\tNODE\tNODE\t X \n"
+
+	got := parseNVIDIATopologyMatrix(input)
+	if got.GPUCount != 2 {
+		t.Fatalf("GPUCount=%d want 2", got.GPUCount)
+	}
+	if !got.AllActive || got.MinNVLinks != 18 {
+		t.Fatalf("AllActive=%v MinNVLinks=%d want true/18", got.AllActive, got.MinNVLinks)
+	}
+}
+
 func TestParseNVIDIATopologyMatrixEmpty(t *testing.T) {
 	t.Parallel()