Claude opus authored everything to make the user and task work. First iteration

Provider/main/api/tasks/update.cpp

@@ -0,0 +1,77 @@
+// POST /api/tasks/update — Modify a task
+// Body: {"id":1, "title":"...", "due_date":..., "completed":true}
+// All fields except "id" are optional
+
+#include "cJSON.h"
+#include "esp_http_server.h"
+
+#include "todo.hpp"
+#include "types.hpp"
+
+internal esp_err_t api_tasks_update_handler(httpd_req_t *req)
+{
+  httpd_resp_set_type(req, "application/json");
+  httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
+
+  char buf[256];
+  int received = httpd_req_recv(req, buf, sizeof(buf) - 1);
+  if (received <= 0)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Empty body");
+    return ESP_FAIL;
+  }
+  buf[received] = '\0';
+
+  cJSON *body = cJSON_Parse(buf);
+  if (!body)
+  {
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Invalid JSON");
+    return ESP_FAIL;
+  }
+
+  cJSON *id_item = cJSON_GetObjectItem(body, "id");
+  if (!cJSON_IsNumber(id_item))
+  {
+    cJSON_Delete(body);
+    httpd_resp_send_err(req, HTTPD_400_BAD_REQUEST, "Missing 'id'");
+    return ESP_FAIL;
+  }
+
+  task_t *task = find_task((uint16)id_item->valueint);
+  if (!task)
+  {
+    cJSON_Delete(body);
+    httpd_resp_send_err(req, HTTPD_404_NOT_FOUND, "Task not found");
+    return ESP_FAIL;
+  }
+
+  // Update fields if present
+  cJSON *title_item = cJSON_GetObjectItem(body, "title");
+  if (cJSON_IsString(title_item))
+  {
+    strlcpy(task->title, title_item->valuestring, sizeof(task->title));
+  }
+
+  cJSON *due_date_item = cJSON_GetObjectItem(body, "due_date");
+  if (cJSON_IsNumber(due_date_item))
+  {
+    task->due_date = (int64)due_date_item->valuedouble;
+  }
+
+  cJSON *completed_item = cJSON_GetObjectItem(body, "completed");
+  if (cJSON_IsBool(completed_item))
+  {
+    task->completed = cJSON_IsTrue(completed_item);
+  }
+
+  cJSON_Delete(body);
+
+  httpd_resp_sendstr(req, "{\"status\":\"ok\"}");
+  return ESP_OK;
+}
+
+internal const httpd_uri_t api_tasks_update_uri = {.uri = "/api/tasks/update",
+                                                   .method = HTTP_POST,
+                                                   .handler =
+                                                       api_tasks_update_handler,
+                                                   .user_ctx = NULL};