feat: improve SMART temperature parsing with multi-command fallback and enhanced line-based extraction logic

Replace regex pattern matching with extract() helper that iterates through output lines, filters for temperature/airflow keywords, and extracts values using explicit unit patterns (°C/Celsius/degrees C) with 0-150 range validation or fallback to last plausible number in line. Add smartctl -x/-x -d sat commands to fallback chain after -A/-A -d sat attempts with early return on first successful

app.py

@@ -357,17 +357,29 @@ def smart_temperature(device):
     if not SMART_ENABLED or not shutil.which("smartctl"):
         return "Nicht verfügbar"
     smart_device = device.replace("/dev/", f"{HOST_DEVICE_PATH.rstrip('/')}/", 1)
-    output, error = _read_command(["smartctl", "-A", smart_device], timeout=6, warn_on_nonzero=False)
-    if not output:
-        output, error = _read_command(["smartctl", "-A", "-d", "sat", smart_device], timeout=6, warn_on_nonzero=False)
-    patterns = (
-        r"(?:Temperature_Celsius|Airflow_Temperature_Cel|Drive_Temperature|Current Drive Temperature)\s+.*?\s(\d{1,3})(?:\s*°?C)?\s*$",
-        r"^\s*Temperature:\s*(\d{1,3})\s*(?:C|°C|Celsius)?\s*$",
-    )
-    for pattern in patterns:
-        match = re.search(pattern, output, re.IGNORECASE | re.MULTILINE)
-        if match:
-            return f"{int(match.group(1))} °C"
+    def extract(output):
+        for line in output.splitlines():
+            if not re.search(r"temperature|airflow", line, re.IGNORECASE):
+                continue
+            explicit = re.search(r"(\d{1,3})\s*(?:°\s*C|Celsius|degrees?\s*C)\b", line, re.IGNORECASE)
+            if explicit and 0 < int(explicit.group(1)) < 150:
+                return f"{int(explicit.group(1))} °C"
+            numbers = [int(value) for value in re.findall(r"\b\d{1,3}\b", line)]
+            plausible = [value for value in numbers if 0 < value < 150]
+            if plausible:
+                return f"{plausible[-1]} °C"
+        return None
+
+    for command in (
+        ["smartctl", "-A", smart_device],
+        ["smartctl", "-A", "-d", "sat", smart_device],
+        ["smartctl", "-x", smart_device],
+        ["smartctl", "-x", "-d", "sat", smart_device],
+    ):
+        output, _ = _read_command(command, timeout=6, warn_on_nonzero=False)
+        temperature = extract(output)
+        if temperature:
+            return temperature
     return "Nicht verfügbar"
 
 def raid_status():