feat(web,mqtt): add repeater dashboard, MQTT settings, and stabilise HTTPS/TLS startup

src/helpers/web/WebPanelServer.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include <stddef.h>
+
+#if defined(ESP_PLATFORM)
+  #include <WiFi.h>
+  #if !defined(WITH_WEB_PANEL)
+    #define WITH_WEB_PANEL 1
+  #endif
+  #if WITH_WEB_PANEL
+    #include <esp_https_server.h>
+  #endif
+#endif
+
+class WebPanelCommandRunner {
+public:
+  virtual ~WebPanelCommandRunner() = default;
+  virtual void runWebCommand(const char* command, char* reply, size_t reply_size) = 0;
+  virtual const char* getWebAdminPassword() const = 0;
+};
+
+class WebPanelServer {
+public:
+  WebPanelServer();
+
+  void setCommandRunner(WebPanelCommandRunner* runner);
+  bool start();
+  void stop();
+  bool isRunning() const;
+  bool hasSessionToken() const;
+
+private:
+#if defined(ESP_PLATFORM) && WITH_WEB_PANEL
+  struct RouteContext {
+    WebPanelServer* self;
+  };
+
+  WebPanelCommandRunner* _runner;
+  httpd_handle_t _server;
+  char _token[33];
+  RouteContext _route_context;
+
+  static esp_err_t handleIndex(httpd_req_t* req);
+  static esp_err_t handleLogin(httpd_req_t* req);
+  static esp_err_t handleCommand(httpd_req_t* req);
+  static esp_err_t handleBootstrap(httpd_req_t* req);
+  static esp_err_t handleStats(httpd_req_t* req);
+
+  bool readRequestBody(httpd_req_t* req, char* buffer, size_t buffer_size) const;
+  void refreshToken();
+  bool isAuthorized(httpd_req_t* req) const;
+#else
+  WebPanelCommandRunner* _runner;
+#endif
+};