fix(electron-bot): show chat subtitle on display (#2042)

* Enhance Otto Robot camera support by adding configuration for OV3660. Updated config.h to define camera types and GPIO settings, modified config.json to include new camera options, and refactored otto_robot.cc for improved camera detection and initialization logic.

* fix: 移除 OttoEmojiDisplay 构造函数中的 SetTheme 调用以修复 LoadProhibited 崩溃

Made-with: Cursor

* refactor: improve audio service error handling and codec timeout management

- Updated AudioService to prevent input task termination on read timeout, introducing a delay instead.
- Enhanced NoAudioCodec to implement a read timeout for I2S channel reads.
- Adjusted WebSocketControlServer to set a control port for improved socket management.
- Added manufacturer information to the config.json for waveshare ESP32-Touch-LCD-3.5.

* fix(otto): WebSocket direct clients not receiving MCP responses

When a browser connects directly to the WebSocket control server (port
8080) and sends a JSON-RPC request, the MCP response was routed through
Application::SendMcpMessage -> protocol_->SendMcpMessage, which sends it
to the cloud protocol channel. As a result, the direct WebSocket client
never received the response, while the WeChat mini-program could because
it communicates via the cloud.

Fix:
- Add BroadcastMessage() to WebSocketControlServer, using
  httpd_queue_work + httpd_ws_send_frame_async to asynchronously
  send responses back to all connected clients on port 8080
- Add RegisterMcpBroadcastCallback() to Application, allowing an
  additional MCP send callback to be registered; SendMcpMessage()
  now invokes it alongside the cloud protocol
- Register the broadcast callback in OttoRobot after the WebSocket
  server starts successfully

Also add WebSocket direct-connect API documentation to README.md
with complete JSON-RPC 2.0 command examples.

* fix(otto-robot): migrate camera backend and set safe dark default theme

- Migrate `otto-robot` camera backend from `EspVideo` to `Esp32Camera` to improve capture stability after reboot/power cycle.
- Keep runtime sensor detection for both OV2640 and OV3660, and rename PID macros with `OTTO_` prefix to avoid symbol conflicts.
- Configure camera output as `RGB565 + FRAMESIZE_240X240` to match the 240x240 display.
- Rotate OV2640 output by 180 degrees (`VFlip + HMirror`) for correct orientation.
- Simplify `otto-robot` camera sdkconfig options by keeping only:
  - `CONFIG_CAMERA_OV2640=y`
  - `CONFIG_CAMERA_OV3660=y`
- Move Otto default dark theme setup into `OttoEmojiDisplay::SetupUI()` (after base UI init) to avoid boot-time LVGL null-object crash caused by calling `SetTheme()` too early.

* feat(motion): smooth action ending and adaptive homing on otto/electron-bot

Improve servo motion transitions to reduce abrupt returns to home pose.
Replace linear interpolation with ease-out movement, make homing duration adaptive to angle delta, and skip intermediate homing when queued actions are pending to keep multi-action sequences fluid.

* fix(electron-bot): show chat subtitle on display

ElectronEmojiDisplay overrode SetupChatLabel() to delete the parent's
chat_message_label_ (which lives inside bottom_bar_) and recreate it on the
bottom-layer container_ without alignment. As a result the real subtitle label
was hidden behind emoji_box_/top_bar_, while SetChatMessage() only toggled the
now-empty bottom_bar_, so chat subtitles were never visible.

Reuse the parent label created in bottom_bar_ (matching otto-robot) and only
switch to the dark theme in SetupUI(), removing the custom SetupChatLabel().

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

* fix(electron-bot): restore status icons on standby and clean up display

- SetStatus() did not re-show network_label_/battery_label_ when returning
  to STANDBY, so the WiFi and battery icons stayed hidden after listening or
  speaking. Restore them on standby to match otto-robot.
- Remove the unused InitializeElectronEmojis() method and its declaration.
- Drop unused includes (vector, assets.h, emoji_collection.h, lvgl_image.h)
  and add the missing trailing newline in the header.

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

---------

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

main/boards/electron-bot/electron_emoji_display.cc

@@ -3,12 +3,8 @@
 #include <esp_log.h>
 
 #include <cstring>
-#include <vector>
 
-#include "assets.h"
 #include "assets/lang_config.h"
-#include "display/lvgl_display/emoji_collection.h"
-#include "display/lvgl_display/lvgl_image.h"
 #include "display/lvgl_display/lvgl_theme.h"
 
 #define TAG "ElectronEmojiDisplay"
@@ -24,43 +20,20 @@ void ElectronEmojiDisplay::SetupUI() {
         return;
     }
     
-    // Call parent SetupUI() first to create all lvgl objects (including container_)
+    // Call parent SetupUI() first to create all lvgl objects (including container_,
+    // bottom_bar_ and chat_message_label_)
     SpiLcdDisplay::SetupUI();
 
-    // Setup chat label after parent UI is initialized so that container_ is valid
-    SetupChatLabel();
+    // UI 对象创建完成后切换主题（复用父类创建好的字幕标签，不再重建）
+    auto* dark_theme = LvglThemeManager::GetInstance().GetTheme("dark");
+    if (dark_theme != nullptr) {
+        SetTheme(dark_theme);
+    }
 
     // Set default emotion after UI is initialized
     SetEmotion("staticstate");
 }
 
-void ElectronEmojiDisplay::InitializeElectronEmojis() {
-    ESP_LOGI(TAG, "Electron表情初始化将由Assets系统处理");
-    // 表情初始化已移至assets系统,通过DEFAULT_EMOJI_COLLECTION=otto-gif配置
-    // assets.cc会从assets分区加载GIF表情并设置到theme
-    // Note: Default emotion is now set in SetupUI() after LVGL objects are created
-}
-
-void ElectronEmojiDisplay::SetupChatLabel() {
-    // Create/recreate the chat label under the display lock
-    {
-        DisplayLockGuard lock(this);
-
-        if (chat_message_label_) {
-            lv_obj_del(chat_message_label_);
-        }
-
-        chat_message_label_ = lv_label_create(container_);
-        lv_label_set_text(chat_message_label_, "");
-        lv_obj_set_width(chat_message_label_, width_ * 0.9);
-        lv_label_set_long_mode(chat_message_label_, LV_LABEL_LONG_SCROLL_CIRCULAR);
-        lv_obj_set_style_text_align(chat_message_label_, LV_TEXT_ALIGN_CENTER, 0);
-        lv_obj_set_style_text_color(chat_message_label_, lv_color_white(), 0);
-    }
-    // SetTheme acquires DisplayLockGuard internally, so call it after releasing the lock above
-    SetTheme(LvglThemeManager::GetInstance().GetTheme("dark"));
-}
-
 LV_FONT_DECLARE(OTTO_ICON_FONT);
 void ElectronEmojiDisplay::SetStatus(const char* status) {
     auto lvgl_theme = static_cast<LvglTheme*>(current_theme_);
@@ -94,6 +67,8 @@ void ElectronEmojiDisplay::SetStatus(const char* status) {
         lv_obj_set_style_text_font(status_label_, text_font, 0);
         lv_label_set_text(status_label_, "");
         lv_obj_clear_flag(status_label_, LV_OBJ_FLAG_HIDDEN);
+        lv_obj_clear_flag(network_label_, LV_OBJ_FLAG_HIDDEN);
+        lv_obj_clear_flag(battery_label_, LV_OBJ_FLAG_HIDDEN);
         return;
     }
 

main/boards/electron-bot/electron_emoji_display.h

@@ -16,8 +16,4 @@ class ElectronEmojiDisplay : public SpiLcdDisplay {
     virtual ~ElectronEmojiDisplay() = default;
     virtual void SetStatus(const char* status) override;
     virtual void SetupUI() override;
-
-   private:
-    void InitializeElectronEmojis();
-    void SetupChatLabel();
-};
+};