Phase 6a-6d: Consolidate and clean up

6a: Delete dead standalone tollgate_core/ (12 files, never compiled)
6b: Rewrite dns_server.c as thin shim to component's tollgate_core_dns
    - Fix component DNS to bind to AP IP instead of INADDR_ANY
6c: Rewrite stratum_proxy.c as thin shim with struct cast to component types
6d: Move sandbox logic into component's tollgate_core_firewall
    - Add tollgate_core_fw_set_sandbox_ports/set_sandbox_mint_access
    - Add is_sandbox_allowed() to component's ip4_canforward_filter
    - Clean main/firewall.c to delegate filter to component
    - Remove redundant DNS auth double-calls from main firewall
Add ROADMAP.md with full extraction plan and checklists

All 21 unit tests pass. ESP-IDF build passes.

1 files changed, 0 insertions, 68 deletions

diff --git a/tollgate_core/include/tollgate_platform.h b/tollgate_core/include/tollgate_platform.h
deleted file mode 100644
index b553a83..0000000
--- a/tollgate_core/include/tollgate_platform.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#ifndef TOLLGATE_PLATFORM_H
-#define TOLLGATE_PLATFORM_H
-
-#include <stdint.h>
-#include <stdbool.h>
-#include <stddef.h>
-
-typedef struct {
-    uint16_t     (*get_price_sats)(void);
-    int32_t      (*get_step_ms)(void);
-    int64_t      (*get_step_bytes)(void);
-    const char*  (*get_mint_url)(void);
-    const char*  (*get_metric)(void);
-
-    int64_t      (*get_time_ms)(void);
-
-    void         (*log_info)(const char *tag, const char *fmt, ...);
-    void         (*log_warn)(const char *tag, const char *fmt, ...);
-    void         (*log_error)(const char *tag, const char *fmt, ...);
-
-    bool         (*wallet_receive)(const char *token);
-    bool         (*wallet_send)(uint64_t amount, char *buf, size_t buf_len);
-    uint64_t     (*wallet_balance)(void);
-
-    int          (*http_post)(const char *url, const char *headers,
-                             const char *body, int body_len,
-                             char *resp, int resp_len);
-
-    bool         (*create_task)(void (*fn)(void*), void *arg,
-                               const char *name, int stack_bytes, int priority);
-
-    int          (*socket_udp)(void);
-    int          (*socket_tcp)(void);
-    int          (*socket_bind)(int fd, uint32_t ip, uint16_t port);
-    int          (*socket_listen)(int fd, int backlog);
-    int          (*socket_accept)(int fd, uint32_t *client_ip, uint16_t *client_port);
-    int          (*socket_recvfrom)(int fd, void *buf, int len,
-                                    uint32_t *src_ip, uint16_t *src_port);
-    int          (*socket_sendto)(int fd, const void *buf, int len,
-                                  uint32_t dest_ip, uint16_t dest_port);
-    int          (*socket_read)(int fd, void *buf, int len);
-    int          (*socket_write)(int fd, const void *buf, int len);
-    void         (*socket_close)(int fd);
-    void         (*socket_set_recv_timeout)(int fd, int ms);
-
-    bool         (*get_sta_mac_ip_list)(void *list_out, int max, int *count_out);
-    bool         (*set_vendor_ie)(bool enable, const void *ie_data, int ie_len);
-    int          (*arp_get_mac)(uint32_t ip, uint8_t *mac_out);
-    void         (*napt_enable)(uint32_t ip, bool enable);
-
-    bool         (*mining_enabled)(void);
-    const char*  (*get_stratum_host)(void);
-    uint16_t     (*get_stratum_port)(void);
-    const char*  (*get_stratum_user)(void);
-    const char*  (*get_stratum_pass)(void);
-    uint16_t     (*get_mining_port)(void);
-    uint64_t     (*get_hashprice_override)(void);
-
-    void         (*fill_random)(void *buf, int len);
-
-    int          (*get_accepted_mint_count)(void);
-    const char*  (*get_accepted_mint)(int index);
-    bool         (*is_mint_reachable)(const char *mint_url);
-    bool         (*mac_for_ip)(uint32_t ip, char *mac_out, int mac_out_size);
-
-} tollgate_platform_t;
-
-#endif