feat: add tollgate_core component + market config wiring

- Add tollgate_core ESP-IDF component (skeleton: cashu, dns, firewall, session)
- Add tollgate_platform.c with SPIFFS config backend
- Wire market_enabled, market_scan_interval_s, client_auto_switch in config.c
- Add lwip_tollgate_hooks.h (updated from feature branch)
- Add E2E fix plan, tollgate_core design doc, WPA autodetect plan
- Add integration test network helpers
- Add CONSOLIDATION.md plan

Reverts the broken merge (be4788b) that gutted config.c/tollgate_main.c/tollgate_api.c
and replaces it with a clean addition on top of intact master.

2 files changed, 51 insertions, 0 deletions

diff --git a/components/tollgate_core/include/tollgate_core.h b/components/tollgate_core/include/tollgate_core.h
new file mode 100644
index 0000000..c47ebeb
--- /dev/null
+++ b/components/tollgate_core/include/tollgate_core.h
@@ -0,0 +1,34 @@
+#ifndef TOLLGATE_CORE_H
+#define TOLLGATE_CORE_H
+
+#include "tollgate_platform.h"
+#include "esp_err.h"
+#include "esp_netif.h"
+#include <stdbool.h>
+#include <stdint.h>
+
+esp_err_t tollgate_core_init(const tollgate_platform_t *platform, esp_ip4_addr_t ap_ip);
+
+esp_err_t tollgate_core_dns_start(esp_ip4_addr_t upstream_dns);
+void tollgate_core_dns_stop(void);
+
+esp_err_t tollgate_core_process_payment(uint32_t client_ip, const char *token_str);
+
+void tollgate_core_client_connected(const uint8_t *mac, uint32_t client_ip);
+void tollgate_core_client_disconnected(const uint8_t *mac);
+
+void tollgate_core_tick(void);
+
+bool tollgate_core_is_client_allowed(uint32_t client_ip);
+bool tollgate_core_is_dns_running(void);
+
+char *tollgate_core_get_status_json(void);
+char *tollgate_core_get_config_json(void);
+
+int tollgate_core_active_session_count(void);
+int tollgate_core_allowed_client_count(void);
+
+bool tollgate_core_is_owner(uint32_t client_ip);
+bool tollgate_core_is_owner_connected(void);
+
+#endif
diff --git a/components/tollgate_core/include/tollgate_platform.h b/components/tollgate_core/include/tollgate_platform.h
new file mode 100644
index 0000000..f60f1f9
--- /dev/null
+++ b/components/tollgate_core/include/tollgate_platform.h
@@ -0,0 +1,17 @@
+#ifndef TOLLGATE_PLATFORM_H
+#define TOLLGATE_PLATFORM_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+    uint16_t     (*get_price_sats)(void);
+    int32_t      (*get_step_ms)(void);
+    const char * (*get_mint_url)(void);
+    const char * (*get_metric)(void);
+    int32_t      (*get_step_bytes)(void);
+    int64_t      (*get_time_ms)(void);
+    bool         (*spend_proofs)(const char *raw_token_json);
+} tollgate_platform_t;
+
+#endif