IEP-1650 Convert NVS Title Area dialog to the editor

bundles/com.espressif.idf.ui/plugin.xml

@@ -739,8 +739,8 @@
         class="com.espressif.idf.ui.nvs.dialog.NvsEditor"
         default="false"
         icon="icons/ESP-IDF_NVS_Table_Editor.png"
-        id="com.espressif.idf.ui.nvs_table_editor"
-        name="NVS Table Editor">
+        id="com.espressif.idf.ui.nvs.nvsEditor"
+        name="%command.name.nvsTableEditor">
      <contentTypeBinding
            contentTypeId="com.espressif.idf.ui.nvs_editor_content_type">
      </contentTypeBinding>

bundles/com.espressif.idf.ui/src/com/espressif/idf/ui/nvs/dialog/NvsColumn.java

@@ -0,0 +1,76 @@
+/*******************************************************************************
+ * Copyright 2025 Espressif Systems (Shanghai) PTE LTD. All rights reserved.
+ * Use is subject to license terms.
+ *******************************************************************************/
+package com.espressif.idf.ui.nvs.dialog;
+
+import java.util.stream.Stream;
+
+/**
+ * Represents the columns in the NVS TableViewer. This enum provides a type-safe way to manage column properties,
+ * replacing "magic numbers" and string arrays.
+ */
+public enum NvsColumn
+{
+
+	KEY("Key", 100), TYPE("Type", 100), ENCODING("Encoding", 100), VALUE("Value", 150); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
+
+	private final String displayName;
+	private final int defaultWidth;
+
+	NvsColumn(String displayName, int defaultWidth)
+	{
+		this.displayName = displayName;
+		this.defaultWidth = defaultWidth;
+	}
+
+	/**
+	 * @return The human-readable name for the table header.
+	 */
+	public String getDisplayName()
+	{
+		return displayName;
+	}
+
+	/**
+	 * @return The default pixel width for the column.
+	 */
+	public int getDefaultWidth()
+	{
+		return defaultWidth;
+	}
+
+	/**
+	 * @return The integer index (position) of this column.
+	 */
+	public int getIndex()
+	{
+		return this.ordinal();
+	}
+
+	/**
+	 * A static helper to get an array of all display names for JFace APIs like {@code setColumnProperties}.
+	 *
+	 * @return ["Key", "Type", "Encoding", "Value"]
+	 */
+	public static String[] getColumnProperties()
+	{
+		return Stream.of(values()).map(NvsColumn::getDisplayName).toArray(String[]::new);
+	}
+
+	/**
+	 * A static helper to get the enum constant from its index.
+	 *
+	 * @param index The column index.
+	 * @return The matching NvsColumn (e.g., KEY for index 0).
+	 */
+	public static NvsColumn fromIndex(int index)
+	{
+		if (index >= 0 && index < values().length)
+		{
+			return values()[index];
+		}
+		// This should ideally not be reachable if validation is correct
+		throw new IndexOutOfBoundsException("Invalid column index: " + index); //$NON-NLS-1$
+	}
+}