fix: Correct CSV column order to match blackbox_decode format

- energyCumulative (mAh) now positioned after I frame fields, before S frame fields
- Fixes critical data integrity issue where analysis tools read wrong columns
- Column order now exactly matches blackbox_decode reference implementation
- Resolves PNG visualization differences caused by column misalignment

Author: nerdCopter

src/main.rs

@@ -222,7 +222,16 @@ impl CsvFieldMap {
             csv_field_names.push(csv_name);
         }
 
-        // S frame fields
+        // Add computed fields IMMEDIATELY after I frame fields (like blackbox_decode does)
+        if field_name_to_lookup
+            .iter()
+            .any(|(_, lookup)| lookup == "amperageLatest")
+        {
+            field_name_to_lookup.push(("energyCumulative (mAh)".to_string(), "".to_string()));
+            csv_field_names.push("energyCumulative (mAh)".to_string());
+        }
+
+        // S frame fields (with flag formatting)
         for field_name in &header.s_frame_def.field_names {
             let trimmed = field_name.trim();
             if trimmed == "time" {
@@ -242,15 +251,6 @@ impl CsvFieldMap {
         // NOTE: G-frame fields excluded from main CSV (will go to separate .gps.csv file in future)
         // NOTE: E-frame fields excluded from main CSV (will go to separate .event file in future)
 
-        // Add computed fields
-        if field_name_to_lookup
-            .iter()
-            .any(|(_, lookup)| lookup == "amperageLatest")
-        {
-            field_name_to_lookup.push(("energyCumulative (mAh)".to_string(), "".to_string()));
-            csv_field_names.push("energyCumulative (mAh)".to_string());
-        }
-
         Self {
             field_name_to_lookup,
         }