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.

4 files changed, 79 insertions, 3 deletions

diff --git a/main/CMakeLists.txt b/main/CMakeLists.txt
index 90000b7..2107cf1 100644
--- a/main/CMakeLists.txt
+++ b/main/CMakeLists.txt
@@ -30,9 +30,10 @@ idf_component_register(SRCS "tollgate_main.c"
                             "stratum_proxy.c"
                             "sw_miner.c"
                             "asic_miner.c"
+                            "tollgate_platform.c"
                     INCLUDE_DIRS "."
                      REQUIRES esp_wifi esp_event esp_netif nvs_flash esp_http_server
                               lwip json esp_http_client mbedtls esp-tls log spiffs
                               nucula_lib secp256k1 axs15231b qrcode wisp_relay
-                              negentropy_lib tcp_transport
+                              negentropy_lib tcp_transport tollgate_core
                      PRIV_REQUIRES esp-tls)
diff --git a/main/config.c b/main/config.c
index aa7da6d..43ab2a7 100644
--- a/main/config.c
+++ b/main/config.c
@@ -46,6 +46,9 @@ esp_err_t tollgate_config_init(void)
     g_config.stratum_port = 3333;
     g_config.mining_port = 3334;
     g_config.mining_sandbox_mint_access = true;
+    g_config.market_enabled = true;
+    g_config.market_scan_interval_s = 30;
+    g_config.client_auto_switch = false;
 
     esp_vfs_spiffs_conf_t conf = {
         .base_path = "/spiffs",
@@ -361,6 +364,15 @@ esp_err_t tollgate_config_init(void)
         if (m_sandbox && cJSON_IsBool(m_sandbox)) g_config.mining_sandbox_mint_access = cJSON_IsTrue(m_sandbox);
     }
 
+    cJSON *market_enabled = cJSON_GetObjectItem(root, "market_enabled");
+    if (market_enabled && cJSON_IsBool(market_enabled)) g_config.market_enabled = cJSON_IsTrue(market_enabled);
+
+    cJSON *market_scan_interval = cJSON_GetObjectItem(root, "market_scan_interval_s");
+    if (market_scan_interval) g_config.market_scan_interval_s = market_scan_interval->valueint;
+
+    cJSON *client_auto_switch = cJSON_GetObjectItem(root, "client_auto_switch");
+    if (client_auto_switch && cJSON_IsBool(client_auto_switch)) g_config.client_auto_switch = cJSON_IsTrue(client_auto_switch);
+
     cJSON_Delete(root);
 
     if (g_config.payout.recipient_count == 0) {
diff --git a/main/lwip_tollgate_hooks.h b/main/lwip_tollgate_hooks.h
index 76017be..2953c48 100644
--- a/main/lwip_tollgate_hooks.h
+++ b/main/lwip_tollgate_hooks.h
@@ -3,8 +3,8 @@
 
 #include "lwip/pbuf.h"
 
-int tollgate_ip4_canforward_filter(struct pbuf *p, u32_t dest_addr_hostorder);
+int tollgate_core_ip4_canforward_filter(struct pbuf *p, u32_t dest_addr_hostorder);
 
-#define LWIP_HOOK_IP4_CANFORWARD(p, addr) tollgate_ip4_canforward_filter(p, addr)
+#define LWIP_HOOK_IP4_CANFORWARD(p, addr) tollgate_core_ip4_canforward_filter(p, addr)
 
 #endif
diff --git a/main/tollgate_platform.c b/main/tollgate_platform.c
new file mode 100644
index 0000000..4083c4e
--- /dev/null
+++ b/main/tollgate_platform.c
@@ -0,0 +1,63 @@
+#include "tollgate_platform.h"
+#include "tollgate_core.h"
+#include "config.h"
+#include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+static const char *TAG = "tollgate_platform";
+
+static uint16_t platform_get_price_sats(void)
+{
+    const tollgate_config_t *cfg = tollgate_config_get();
+    return cfg ? (uint16_t)cfg->price_per_step : 21;
+}
+
+static int32_t platform_get_step_ms(void)
+{
+    const tollgate_config_t *cfg = tollgate_config_get();
+    return cfg ? (int32_t)cfg->step_size_ms : 60000;
+}
+
+static const char *platform_get_mint_url(void)
+{
+    const tollgate_config_t *cfg = tollgate_config_get();
+    return cfg ? cfg->mint_url : "https://testnut.cashu.space";
+}
+
+static const char *platform_get_metric(void)
+{
+    const tollgate_config_t *cfg = tollgate_config_get();
+    return cfg ? cfg->metric : "milliseconds";
+}
+
+static int32_t platform_get_step_bytes(void)
+{
+    const tollgate_config_t *cfg = tollgate_config_get();
+    return cfg ? (int32_t)cfg->step_size_bytes : 22020096;
+}
+
+static int64_t platform_get_time_ms(void)
+{
+    return (int64_t)xTaskGetTickCount() * portTICK_PERIOD_MS;
+}
+
+static bool platform_spend_proofs(const char *raw_token_json)
+{
+    (void)raw_token_json;
+    return true;
+}
+
+const tollgate_platform_t *tollgate_get_platform(void)
+{
+    static const tollgate_platform_t platform = {
+        .get_price_sats = platform_get_price_sats,
+        .get_step_ms = platform_get_step_ms,
+        .get_mint_url = platform_get_mint_url,
+        .get_metric = platform_get_metric,
+        .get_step_bytes = platform_get_step_bytes,
+        .get_time_ms = platform_get_time_ms,
+        .spend_proofs = platform_spend_proofs,
+    };
+    return &platform;
+}