feat: add McpScreen phase 2 display tools

Apps/McpScreen/main/Source/McpScreen.h

@@ -27,6 +27,8 @@ typedef struct {
     lv_obj_t* server_label;
     lv_obj_t* tool_label;
 
+    uint16_t* framebuffer;
+    size_t framebuffer_size;
     uint16_t display_width;
     uint16_t display_height;
     uint16_t draw_width;
@@ -35,6 +37,7 @@ typedef struct {
 } McpScreenState;
 
 bool mcp_services_start(McpScreenState* state);
+void mcp_services_hide(McpScreenState* state);
 void mcp_services_stop(McpScreenState* state);
 
 void mcp_ui_set_server_status(McpScreenState* state, const char* status);
@@ -47,3 +50,27 @@ bool mcp_ui_draw_text(
     int y,
     int size
 );
+bool mcp_ui_draw_rgb565_be(
+    McpScreenState* state,
+    const uint8_t* data,
+    size_t data_size,
+    int x,
+    int y,
+    int width,
+    int height
+);
+bool mcp_ui_draw_bmp(
+    McpScreenState* state,
+    const uint8_t* data,
+    size_t data_size,
+    int x,
+    int y
+);
+bool mcp_ui_draw_pbm(
+    McpScreenState* state,
+    const uint8_t* data,
+    size_t data_size,
+    int x,
+    int y
+);
+char* mcp_ui_get_screenshot_pbm_base64(McpScreenState* state);