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/raid_mgmt_test.go

@@ -82,3 +82,22 @@ func TestParseStorcliResponseDataDrivesPerSlotKeys(t *testing.T) {
 		t.Fatalf("free=%d want 1 (JBOD is a free drive)", len(free))
 	}
 }
+
+func TestClassifyRAIDPrepareAction(t *testing.T) {
+	cases := map[string]raidPrepareAction{
+		"UGood": raidPrepNone,
+		"":      raidPrepNone,
+		"JBOD":  raidPrepSetGood,
+		"UBad":  raidPrepSetGood,
+		"GHS":   raidPrepHotspare,
+		"DHS":   raidPrepHotspare,
+		"Frgn":  raidPrepBlockedFrgn,
+		"Onln":  raidPrepBlockedOnln,
+		"Offln": raidPrepBlockedOnln,
+	}
+	for state, want := range cases {
+		if got := classifyRAIDPrepareAction(state); got != want {
+			t.Errorf("state %q: got %v want %v", state, got, want)
+		}
+	}
+}