edit of all config data via website

Signed-off-by: Peter Siegmund <developer@mars3142.org>

firmware/components/simulator/include/storage.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include "esp_err.h"
+
 #ifdef __cplusplus
 extern "C"
 {
@@ -8,6 +10,14 @@ extern "C"
     void load_file(const char *filename);
     char **read_lines_filtered(const char *filename, int *out_count);
     void free_lines(char **lines, int count);
+    /**
+     * Write an array of lines to a file (CSV or other text).
+     * @param filename File name (without /spiffs/)
+     * @param lines Array of lines (null-terminated strings)
+     * @param count Number of lines
+     * @return ESP_OK on success, error code otherwise
+     */
+    esp_err_t write_lines(const char *filename, char **lines, int count);
 #ifdef __cplusplus
 }
 #endif