Merge pull request #21 from Flo5k5/feat/kconfig-server-url

feat(firmware): add CONFIG_STACKCHAN_SERVER_URL Kconfig option

firmware/main/Kconfig.projbuild

@@ -1,3 +1,16 @@
+menu "StackChan Server"
+
+config STACKCHAN_SERVER_URL
+    string "StackChan server base URL"
+    default "http://47.113.125.164:12800"
+    help
+        Base URL (scheme + host + port, no trailing slash) of the StackChan backend.
+        The HAL composes endpoint paths like /stackChan/device/user,
+        /stackChan/apps and /stackChan/ws from this base. Override in your
+        sdkconfig.defaults.local to point at a self-hosted deployment.
+
+endmenu
+
 menu "Xiaozhi Assistant"
 
 config OTA_URL

firmware/main/hal/utils/secret_logic/secret_logic.cpp

@@ -4,12 +4,17 @@
  * SPDX-License-Identifier: MIT
  */
 #include "secret_logic.h"
+#include <sdkconfig.h>
 
 namespace secret_logic {
 
 __attribute__((weak)) std::string get_server_url()
 {
+#ifdef CONFIG_STACKCHAN_SERVER_URL
+    return CONFIG_STACKCHAN_SERVER_URL;
+#else
     return "http://localhost:3000";
+#endif
 }
 
 __attribute__((weak)) std::string generate_auth_token()