feat(ui): extend set_clock_app to edit day/month/year, not just time

time_edit_field now cycles through 5 fields (hour/min/day/month/year)
via long-press CONFIRM. Up/down adjusts whichever field is focused,
with day clamped to Days_In_Month() when month/year changes, and
Clock_RecalcWeekday() called after every date edit so the weekday
label stays in sync. UI_UpdateSetTimeDigit() now also refreshes the
weekday abbreviation when editing day/month/year, since the computed
weekday can change independently of which digit was actually touched.
Save writes the full date+weekday via PCF8563_WriteDateTime(). Also
removes PCF8563_ReadTime()/WriteTime(), now unused since every caller
was updated to the DateTime variants directly.

Drivers/pcf8563.h

@@ -24,24 +24,6 @@
  */
 bit PCF8563_Init(void);
 
-/**
- * @brief 从 PCF8563 芯片读取当前时间 (时、分、秒)
- * @param hour 小时指针 (0~23)
- * @param min 分钟指针 (0~59)
- * @param sec 秒钟指针 (0~59)
- * @return bit 1: 读取成功, 0: 通讯失败
- */
-bit PCF8563_ReadTime(u8 *hour, u8 *min, u8 *sec);
-
-/**
- * @brief 将指定的时间 (时、分、秒) 写入 PCF8563 芯片
- * @param hour 小时 (0~23)
- * @param min 分钟 (0~59)
- * @param sec 秒钟 (0~59)
- * @return bit 1: 写入成功, 0: 通讯失败
- */
-bit PCF8563_WriteTime(u8 hour, u8 min, u8 sec);
-
 /**
  * @brief 从 PCF8563 芯片连续读取时间与日期 (时/分/秒/日/月/年)
  * @param hour 小时指针 (0~23)