Clean install: use normal switch copy, not .offload-aware

- update_mode_install(variant, offload_aware_switch): true = update (preserve .offload), false = clean
- Update path calls with true; clean_mode_install calls with false so switch/ is copied normally on fresh install

Made-with: Cursor

source/install.c

@@ -764,7 +764,7 @@ int perform_installation(omninx_variant_t pack_variant, install_mode_t mode) {
         install_set_color(COLOR_YELLOW);
         gfx_printf("Schritt 2: Dateien kopieren...\n");
         install_set_color(COLOR_WHITE);
-        res = update_mode_install(pack_variant);
+        res = update_mode_install(pack_variant, true);
         if (res != FR_OK) return res;
         
         install_check_and_clear_screen_if_needed();