fix: migrate old config_* ini backups to tar.gz

_release.md

@@ -4,6 +4,13 @@ Cross-platform terminal application.  No admin permissions or network access req
 Pre-compiled binaries — no installation, no dependencies.  Just download,
 extract, and run.
 
+### What's new in v0.4.1
+
+• Log migration — existing `transaction.log` is moved into `logs/` on first launch
+• Backup directory structure scaffolded at startup (`backups/saves/`, `backups/config/`, `logs/`)
+• `ensure_dir()` helper for consistent directory creation
+• All migration paths integrated into startup (config.ini, backups, log)
+
 ### What's new in v0.4.0
 
 • tar.gz backup format — one archive per backup event, standard `tar -xzf` recovers data without the tool
@@ -15,4 +22,4 @@ extract, and run.
 • 6 migration tests, full round-trip tar.gz integration tests
 • `tar` + `flate2` dependencies added (pure Rust, ~150KB increase)
 
-_Builds:  Linux (amd64)  •  Windows x64_
+Builds:  Linux (amd64)  •  Windows x64

src/ops.rs

@@ -395,15 +395,12 @@ fn migrate_backups_from(old_root: PathBuf) -> Result<usize> {
                 continue;
             }
             let dir_name = entry.file_name().to_string_lossy().to_string();
-            if !dir_name.starts_with("notalterra_copy_") {
-                continue;
-            }
-            // Check if this directory contains save files
+
+            if dir_name.starts_with("notalterra_copy_") {
+                // Migrate old save backups → backups/saves/
                 let has_saves = fs::read_dir(&path)
                     .map(|e| e.flatten().any(|f| {
-                    let fname = f.file_name();
-                    let n = fname.to_string_lossy();
-                    n.starts_with("savegame_")
+                        f.file_name().to_string_lossy().starts_with("savegame_")
                     }))
                     .unwrap_or(false);
                 if !has_saves {
@@ -419,6 +416,19 @@ fn migrate_backups_from(old_root: PathBuf) -> Result<usize> {
                         eprintln!("migration warning: failed to archive {:?}: {}", path, e);
                     }
                 }
+            } else if dir_name.starts_with("config_") {
+                // Migrate old .ini backups → backups/config/
+                let backup_dir = crate::config::backups_config_dir();
+                match create_tar_gz(&path, &backup_dir, "", &format!("migrated_{dir_name}")) {
+                    Ok((_count, _size, archive_path)) if archive_path.exists() => {
+                        migrated += 1;
+                    }
+                    Ok(_) => {},
+                    Err(e) => {
+                        eprintln!("migration warning: failed to archive {:?}: {}", path, e);
+                    }
+                }
+            }
         }
     }
     Ok(migrated)