Phase 7: eliminate shims - consumer files use component headers directly

- Deleted standalone shims: session.c/h, cashu.c/h, mining_payment.c/h, firewall.c/h
- Updated captive_portal.c, tollgate_api.c, tollgate_main.c, mcp_handler.c,
  cvm_server.c, sw_miner.c, stratum_client.c to include component headers
- Moved tollgate_ip4_canforward_filter() lwIP hook into tollgate_main.c
- Fixed all unit tests to use component API (test_cashu, test_session,
  test_mining_payment, test_stratum_proxy, test_session_payment_method,
  test_firewall_sandbox, test_mcp_handler)
- Removed deleted source files from Makefile targets
- All 21 unit tests pass, ESP-IDF build passes

1 files changed, 2 insertions, 2 deletions

diff --git a/main/stratum_client.c b/main/stratum_client.c
index cf88daf..a308a5b 100644
--- a/main/stratum_client.c
+++ b/main/stratum_client.c
@@ -1,6 +1,6 @@
 #include "stratum_client.h"
 #include "stratum_proxy.h"
-#include "mining_payment.h"
+#include "tollgate_core_mining.h"
 #include "config.h"
 #include "esp_log.h"
 #include "esp_transport.h"
@@ -124,7 +124,7 @@ static void handle_mining_notify(cJSON *params)
     memset(job.target, 0xFF, 32);
     job.target_len = 32;
 
-    mining_set_current_nbits(job.nbits);
+    tollgate_core_mining_set_current_nbits(job.nbits);
     stratum_proxy_set_job(&job);
 
     ESP_LOGI(TAG, "New mining job: id=%lu, nbits=0x%08lx", (unsigned long)job.job_id, (unsigned long)job.nbits);