refactor: clean install backup — dbi.config and prod.keys only

- Backup/restore DBI settings file instead of whole DBI folder
- Remove Tinfoil folder backup/restore
- Adjust deletion_lists_clean.h comments; UI strings in install_clean.c

Made-with: Cursor

source/install_clean.c

@@ -34,7 +34,7 @@
 // Clean mode: Backup user data
 int clean_mode_backup(void) {
     set_color(COLOR_CYAN);
-    gfx_printf("  Sichere: DBI, Tinfoil, prod.keys\n");
+    gfx_printf("  Sichere: DBI (dbi.config), prod.keys\n");
     set_color(COLOR_WHITE);
     int res = backup_user_data();
     if (res == FR_OK) {
@@ -95,7 +95,7 @@ int clean_mode_wipe(void) {
 // Clean mode: Restore user data
 int clean_mode_restore(void) {
     set_color(COLOR_CYAN);
-    gfx_printf("  Stelle wieder her: DBI, Tinfoil, prod.keys\n");
+    gfx_printf("  Stelle wieder her: DBI (dbi.config), prod.keys\n");
     set_color(COLOR_WHITE);
     int res = restore_user_data();
     if (res == FR_OK) {