refactor(audit): rename Fan Stress Test → GPU Platform Stress Test

Update all user-facing strings in TUI and ActionResult title.
Internal identifiers (types, functions, file name) unchanged.

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

audit/internal/app/app.go

@@ -505,7 +505,7 @@ func (a *App) RunFanStressTestResult(ctx context.Context, opts platform.FanStres
 	if err != nil && err != context.Canceled {
 		body += "\nERROR: " + err.Error()
 	}
-	return ActionResult{Title: "Fan Stress Test", Body: body}, err
+	return ActionResult{Title: "GPU Platform Stress Test", Body: body}, err
 }
 
 // formatFanStressResult formats the summary.txt from a fan-stress run, including

audit/internal/tui/forms.go

@@ -140,7 +140,7 @@ func (m model) updateConfirm(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 				pollSATProgress("gpu-amd", since),
 			)
 		case actionRunFanStress:
-			m.busyTitle = "Fan Stress Test"
+			m.busyTitle = "GPU Platform Stress Test"
 			m.progressPrefix = "fan-stress"
 			m.progressSince = time.Now()
 			m.progressLines = nil

audit/internal/tui/screen_health_check.go

@@ -317,11 +317,11 @@ func renderHealthCheck(m model) string {
 		if m.hcCursor == hcCurFanStress {
 			pfx = "> "
 		}
-		fmt.Fprintf(&b, "%s[ FAN STRESS TEST [F] ]   (thermal cycling, fan lag, throttle check)\n", pfx)
+		fmt.Fprintf(&b, "%s[ GPU PLATFORM STRESS TEST [F] ]   (thermal cycling, fan lag, throttle check)\n", pfx)
 	}
 
 	fmt.Fprintln(&b)
 	fmt.Fprintln(&b, "─────────────────────────────────────────────────────────────────")
-	fmt.Fprint(&b, "[↑↓] move  [space/enter] toggle  [letter] single test  [R] run all  [F] fan stress  [Esc] back")
+	fmt.Fprint(&b, "[↑↓] move  [space/enter] toggle  [letter] single test  [R] run all  [F] gpu stress  [Esc] back")
 	return b.String()
 }

audit/internal/tui/types.go

@@ -191,7 +191,7 @@ func (m model) confirmBody() (string, string) {
 		return "AMD GPU test", "Run AMD GPU diagnostic pack (rocm-smi)?"
 	case actionRunFanStress:
 		modes := []string{"Quick (2×2min)", "Standard (2×5min)", "Express (2×10min)"}
-		return "Fan Stress Test", "Two-phase GPU thermal cycling test.\n" +
+		return "GPU Platform Stress Test", "Two-phase GPU thermal cycling test.\n" +
 			"Monitors fans, temps, power — detects throttling.\n" +
 			"Mode: " + modes[m.hcMode] + "\n\nAll NVIDIA GPUs will be stressed."
 	default:

iso/builder/config/hooks/normal/9001-amd-rocm.hook.chroot

@@ -5,13 +5,13 @@
 
 set -e
 
-ROCM_VERSION="6.4"
+# ROCm versions to try in order (newest first). Fall back if a version's
+# Release file is missing from the repo (happens with brand-new releases).
+ROCM_CANDIDATES="6.4 6.3 6.2"
 ROCM_KEYRING="/etc/apt/keyrings/rocm.gpg"
 ROCM_LIST="/etc/apt/sources.list.d/rocm.list"
 APT_UPDATED=0
 
-echo "=== AMD ROCm ${ROCM_VERSION}: adding repository ==="
-
 mkdir -p /etc/apt/keyrings
 
 ensure_tool() {
@@ -51,11 +51,26 @@ if ! wget -qO- "https://repo.radeon.com/rocm/rocm.gpg.key" \
     exit 0
 fi
 
-cat > "${ROCM_LIST}" <<EOF
-deb [arch=amd64 signed-by=${ROCM_KEYRING}] https://repo.radeon.com/rocm/apt/${ROCM_VERSION} bookworm main
+# Try each ROCm version until apt-get update succeeds (repo has a Release file).
+ROCM_VERSION=""
+for candidate in ${ROCM_CANDIDATES}; do
+    cat > "${ROCM_LIST}" <<EOF
+deb [arch=amd64 signed-by=${ROCM_KEYRING}] https://repo.radeon.com/rocm/apt/${candidate} bookworm main
 EOF
+    if apt-get update -qq 2>/dev/null; then
+        ROCM_VERSION="${candidate}"
+        echo "=== AMD ROCm ${ROCM_VERSION}: repository available ==="
+        break
+    fi
+    echo "WARN: ROCm ${candidate} repository not available for bookworm, trying next..."
+    rm -f "${ROCM_LIST}"
+done
 
-apt-get update -qq
+if [ -z "${ROCM_VERSION}" ]; then
+    echo "WARN: no ROCm apt repository available for bookworm — skipping ROCm install"
+    rm -f "${ROCM_KEYRING}"
+    exit 0
+fi
 
 # rocm-smi-lib provides the rocm-smi CLI tool for GPU monitoring
 if apt-get install -y --no-install-recommends rocm-smi-lib 2>/dev/null; then
@@ -63,9 +78,9 @@ if apt-get install -y --no-install-recommends rocm-smi-lib 2>/dev/null; then
     if [ -x /opt/rocm/bin/rocm-smi ]; then
         ln -sf /opt/rocm/bin/rocm-smi /usr/local/bin/rocm-smi
     else
-        candidate="$(find /opt -path '*/bin/rocm-smi' -type f 2>/dev/null | sort | tail -1)"
-        if [ -n "${candidate}" ]; then
-            ln -sf "${candidate}" /usr/local/bin/rocm-smi
+        smi_path="$(find /opt -path '*/bin/rocm-smi' -type f 2>/dev/null | sort | tail -1)"
+        if [ -n "${smi_path}" ]; then
+            ln -sf "${smi_path}" /usr/local/bin/rocm-smi
         fi
     fi
     rocm-smi --version 2>/dev/null || true