Phase 1: ESP-IDF v5 project scaffold, custom partitions, managed deps, AGENTS.md hardware context

main/CMakeLists.txt

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+idf_component_register(SRCS
+    "main.c"
+    INCLUDE_DIRS "."
+)

main/idf_component.yml

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+## IDF Component Manager dependencies for MTG RFID Companion
+## NOTE: espressif/esp_lcd is a built-in IDF component - do NOT declare it here.
+dependencies:
+  idf: ">=5.0"
+  abobija/rc522: "*"
+  joltwallet/littlefs: "*"

main/main.c

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+/*
+ * MTG RFID Companion - Entry point
+ *
+ * Phase 1: Boot scaffold. Subsequent phases attach managers here.
+ */
+
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_log.h"
+
+static const char *TAG = "MAIN";
+
+void app_main(void)
+{
+    ESP_LOGI(TAG, "MTG RFID Companion booting...");
+    while (1) {
+        vTaskDelay(pdMS_TO_TICKS(1000));
+    }
+}