refactor(structure): move layered firmware modules from main to components

components/domain/include/image_generation.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "esp_err.h"
+
+typedef struct {
+    const char *prompt;
+    const char *size;
+    bool prompt_extend;
+    bool has_seed;
+    uint32_t seed;
+    uint32_t generation_timeout_ms;
+    uint32_t download_timeout_ms;
+} image_generation_request_t;
+
+typedef struct {
+    uint8_t *png;
+    size_t png_len;
+    char image_url[1024];
+    char output_prompt[256];
+    char request_id[80];
+    uint16_t width;
+    uint16_t height;
+} image_generation_result_t;
+
+void image_generation_result_reset(image_generation_result_t *result);
+void image_generation_result_free(image_generation_result_t *result);
+void image_generation_schedule_prewarm(void);
+
+esp_err_t image_generation_generate_png(const image_generation_request_t *req,
+                                        image_generation_result_t *out_result,
+                                        char *err,
+                                        size_t err_len);