feat: Implement HTTP server with static file serving from LittleFS, system APIs, and network connectivity management.

Provider/main/CMakeLists.txt

@@ -8,7 +8,7 @@ idf_component_register(SRCS  "main.cpp"
 if(CONFIG_CALENDINK_DEPLOY_WEB_PAGES)
     set(WEB_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../frontend")
     if(EXISTS ${WEB_SRC_DIR}/dist)
-        littlefs_create_partition_image(www ${WEB_SRC_DIR}/dist FLASH_IN_PROJECT)
+        littlefs_create_partition_image(www_0 ${WEB_SRC_DIR}/dist FLASH_IN_PROJECT)
     else()
         message(FATAL_ERROR "'${WEB_SRC_DIR}/dist' doesn't exist. Run 'npm run build' in frontend/ first.")
     endif()

Provider/main/appstate.hpp

@@ -5,3 +5,4 @@
 // Shared Application State (Unity Build)
 internal bool g_Ethernet_Initialized = false;
 internal bool g_Wifi_Initialized = false;
+internal uint8_t g_Active_WWW_Partition = 0;

Provider/main/http_server.cpp

@@ -178,7 +178,7 @@ internal httpd_handle_t start_webserver(void)
 #ifdef CONFIG_CALENDINK_DEPLOY_WEB_PAGES
   esp_vfs_littlefs_conf_t conf = {};
   conf.base_path = "/www";
-  conf.partition_label = "www";
+  conf.partition_label = g_Active_WWW_Partition == 0 ? "www_0" : "www_1";
   conf.format_if_mount_failed = false;
   conf.dont_mount = false;
   esp_err_t ret = esp_vfs_littlefs_register(&conf);
@@ -253,7 +253,8 @@ internal void stop_webserver(httpd_handle_t server)
   {
     httpd_stop(server);
 #ifdef CONFIG_CALENDINK_DEPLOY_WEB_PAGES
-    esp_vfs_littlefs_unregister("www");
+    esp_vfs_littlefs_unregister(g_Active_WWW_Partition == 0 ? "www_0"
+                                                            : "www_1");
 #endif
   }
 }

Provider/main/main.cpp

@@ -5,10 +5,12 @@
 #include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
+#include "nvs.h"
 #include "nvs_flash.h"
 #include "sdkconfig.h"
 #include "soc/gpio_num.h"
 
+
 // Project headers
 #include "appstate.hpp"
 #include "types.hpp"
@@ -28,7 +30,33 @@ extern "C" void app_main()
 
   httpd_handle_t web_server = NULL;
 
-  ESP_ERROR_CHECK(nvs_flash_init());
+  esp_err_t err = nvs_flash_init();
+  if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND)
+  {
+    ESP_ERROR_CHECK(nvs_flash_erase());
+    err = nvs_flash_init();
+  }
+  ESP_ERROR_CHECK(err);
+
+  nvs_handle_t my_handle;
+  if (nvs_open("storage", NVS_READWRITE, &my_handle) == ESP_OK)
+  {
+    err = nvs_get_u8(my_handle, "www_part", &g_Active_WWW_Partition);
+    if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND)
+    {
+      printf("Error reading www_part from NVS: %s\n", esp_err_to_name(err));
+    }
+    if (g_Active_WWW_Partition > 1)
+    {
+      g_Active_WWW_Partition = 0;
+    }
+    nvs_close(my_handle);
+  }
+  else
+  {
+    printf("Error opening NVS handle!\n");
+  }
+
   ESP_ERROR_CHECK(esp_event_loop_create_default());
 
   setup_led();