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.

1 files changed, 63 insertions, 0 deletions

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;
+}