fix

main/CMakeLists.txt

@@ -653,12 +653,20 @@ elseif(CONFIG_BOARD_TYPE_ZHENGCHEN_CAM)
     set(BOARD_TYPE "zhengchen-cam")
     set(BUILTIN_TEXT_FONT font_puhui_20_4)
     set(BUILTIN_ICON_FONT font_awesome_20_4)
-    set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis)
+    if(CONFIG_ZHENGCHEN_CAM_USE_GIF_EMOJI)
+        set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis/gif)
+    else()
+        set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis/png)
+    endif()
 elseif(CONFIG_BOARD_TYPE_ZHENGCHEN_CAM_ML307)
     set(BOARD_TYPE "zhengchen-cam-ml307")
     set(BUILTIN_TEXT_FONT font_puhui_20_4)
     set(BUILTIN_ICON_FONT font_awesome_20_4)
-    set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis)
+    if(CONFIG_ZHENGCHEN_CAM_USE_GIF_EMOJI)
+        set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis/gif)
+    else()
+        set(DEFAULT_EMOJI_COLLECTION main/boards/zhengchen-cam/custom-emojis/png)
+    endif()
 elseif(CONFIG_BOARD_TYPE_SPOTPEAR_ESP32_S3_1_54_MUMA)
     set(BOARD_TYPE "sp-esp32-s3-1.54-muma")
     set(BUILTIN_TEXT_FONT font_puhui_basic_16_4)

main/Kconfig.projbuild

@@ -133,6 +133,14 @@ choice BOARD_TYPE
         depends on IDF_TARGET_ESP32S3
 endchoice
 
+config ZHENGCHEN_CAM_USE_GIF_EMOJI
+    bool "Use GIF custom emojis for Zhengchen CAM"
+    depends on BOARD_TYPE_ZHENGCHEN_CAM || BOARD_TYPE_ZHENGCHEN_CAM_ML307
+    default n
+    help
+        When enabled, default assets use custom-emojis/gif.
+        When disabled, default assets use custom-emojis/png.
+
 choice
     depends on BOARD_TYPE_LILYGO_T_DISPLAY_P4
     prompt "Select the screen type"

main/boards/zhengchen-cam/custom-emojis/README.md

@@ -1,7 +1,6 @@
 # Custom Emojis
 
-Put your custom PNG or GIF files in this directory, or in `png/` and `gif/`
+Put your custom PNG files in `png/` and custom GIF files in `gif/`.
-subdirectories.
 
 The filename without extension is used as the emotion name. Directory names are
 not part of the emotion name, so `png/neutral.png` is loaded as `neutral`.
@@ -28,8 +27,12 @@ Recommended minimum set:
 - `angry`
 
 If an emotion-specific image is missing, the firmware falls back to `neutral`
-before using the built-in icon. Do not add both `png/happy.png` and
+before using the built-in icon.
-`gif/happy.gif`; only one image per emotion should be used.
+
+For Zhengchen CAM boards, the build selects one subdirectory:
+
+- `CONFIG_ZHENGCHEN_CAM_USE_GIF_EMOJI=y`: use `gif/`
+- unset `CONFIG_ZHENGCHEN_CAM_USE_GIF_EMOJI`: use `png/`
 
 After adding or replacing files, run a full flash so the assets partition is
 updated:

main/display/lcd_display.cc

@@ -65,7 +65,7 @@ void ApplyEmojiImageScale(lv_obj_t* image_obj, lv_obj_t* image_box, const lv_ima
     if (image_box != nullptr) {
         lv_obj_center(image_obj);
     }
-    ESP_LOGI(TAG, "Emoji image scale=%ld reserved=%ld/%ld size=%ldx%ld -> %ldx%ld",
+    ESP_LOGD(TAG, "Emoji image scale=%ld reserved=%ld/%ld size=%ldx%ld -> %ldx%ld",
              static_cast<long>(scale), static_cast<long>(top_reserved),
              static_cast<long>(bottom_reserved), static_cast<long>(image_width),
              static_cast<long>(image_height),

main/display/lvgl_display/lvgl_display.cc

@@ -3,6 +3,7 @@
 #include <string>
 #include <cstdlib>
 #include <cstring>
+#include <ctime>
 #include <font_awesome.h>
 
 #include "lvgl_display.h"
@@ -22,6 +23,21 @@ LvglDisplay::LvglDisplay() {
             LvglDisplay *display = static_cast<LvglDisplay*>(arg);
             DisplayLockGuard lock(display);
             lv_obj_add_flag(display->notification_label_, LV_OBJ_FLAG_HIDDEN);
+            if (Application::GetInstance().GetDeviceState() == kDeviceStateIdle && display->time_label_ != nullptr) {
+                time_t now = time(NULL);
+                struct tm* tm = localtime(&now);
+                if (tm->tm_year >= 2025 - 1900) {
+                    char time_str[16];
+                    strftime(time_str, sizeof(time_str), "%H:%M", tm);
+                    lv_label_set_text(display->time_label_, time_str);
+                    lv_obj_remove_flag(display->time_label_, LV_OBJ_FLAG_HIDDEN);
+                    lv_obj_add_flag(display->status_label_, LV_OBJ_FLAG_HIDDEN);
+                    return;
+                }
+            }
+            if (display->time_label_ != nullptr) {
+                lv_obj_add_flag(display->time_label_, LV_OBJ_FLAG_HIDDEN);
+            }
             lv_obj_remove_flag(display->status_label_, LV_OBJ_FLAG_HIDDEN);
         },
         .arg = this,