rework smart module to improve parsing

include/smart.h

@@ -10,27 +10,29 @@
 
 #include "reHDD.h"
 
+/**
+ * @brief SMART data reader for drives
+ *
+ * Parses smartctl JSON output to extract:
+ * - Device information (model, serial, capacity)
+ * - Power statistics (hours, cycles)
+ * - Temperature
+ * - Critical sector counts (reallocated, pending, uncorrectable)
+ *
+ * Uses deterministic state machine parser for reliable multi-line JSON parsing.
+ */
 class SMART
 {
 protected:
 public:
+    /**
+     * @brief Read S.M.A.R.T. data from drive and populate Drive object
+     * @param drive Pointer to Drive instance to populate with SMART data
+     */
     static void readSMARTData(Drive *drive);
 
 private:
-    SMART(void);
-
-    static bool parseExitStatus(std::string sLine, uint8_t &status);
-    static bool parseModelFamily(std::string sLine, std::string &modelFamily);
-    static bool parseModelName(std::string sLine, std::string &modelName);
-    static bool parseSerial(std::string sLine, std::string &serial);
-    static bool parseCapacity(std::string sLine, uint64_t &capacity);
-    static bool parseErrorCount(std::string sLine, uint32_t &errorCount);
-    static bool parsePowerOnHours(std::string sLine, uint32_t &powerOnHours);
-    static bool parsePowerCycles(std::string sLine, uint32_t &powerCycles);
-    static bool parseTemperature(std::string sLine, uint32_t &temperature);
-    static bool parseReallocatedSectors(std::string sLine, uint32_t &reallocatedSectors);
-    static bool parsePendingSectors(std::string sLine, uint32_t &pendingSectors);
-    static bool parseUncorrectableSectors(std::string sLine, uint32_t &uncorrectableSectors);
+    SMART(void); // Utility class - no instances
 };
 
-#endif // SMART_H_
+#endif // SMART_H_