feat: add MQTT repeater support, web config panel, and EastMesh-specific firmware workflows

src/helpers/mqtt/JWTHelper.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#ifdef WITH_MQTT_UPLINK
+
+#include <Arduino.h>
+#include <Identity.h>
+
+class JWTHelper {
+public:
+  static bool createAuthToken(const mesh::LocalIdentity& identity, const char* audience, time_t issued_at,
+                              time_t expires_at, char* token, size_t token_size, const char* owner = nullptr,
+                              const char* email = nullptr);
+
+private:
+  static size_t base64UrlEncode(const uint8_t* input, size_t input_len, char* output, size_t output_size);
+};
+
+#endif