Strip TF and audio; keep touch-only screen test UI.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/sd_info.h

@@ -1,21 +0,0 @@
-#pragma once
-
-#include <Arduino.h>
-
-struct SdCardInfo {
-  bool mounted;
-  bool present;
-  const char *type;       // MMC / SDSC / SDHC / UNKNOWN / NONE
-  const char *filesystem; // FAT12 / FAT16 / FAT32 / exFAT / FAT / —
-  uint64_t card_bytes;    // 卡物理容量
-  uint64_t total_bytes;   // 分区总容量
-  uint64_t used_bytes;
-  uint64_t free_bytes;
-  uint32_t root_files;    // 根目录条目数
-  String error;           // 失败原因
-};
-
-bool sd_init();
-void sd_deinit();
-SdCardInfo sd_read_info();
-String format_bytes(uint64_t bytes);