Fix: remove extern C wrappers around Zephyr headers (cbprintf_cxx linkage conflict)

src/engine_init.cc

@@ -17,10 +17,8 @@
 #include "static_allocate.h"
 #include "stroke.h"
 
-extern "C" {
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
-}
 
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 

src/platform/zmk_clock_shim.cc

@@ -1,8 +1,5 @@
 #include "clock.h"
-
-extern "C" {
 #include <zephyr/kernel.h>
-}
 
 uint32_t Clock::GetMilliseconds() { return k_uptime_get_32(); }
 

src/platform/zmk_console_shim.cc

@@ -1,15 +1,9 @@
 #include "console.h"
-
-extern "C" {
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
-}
 
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
-// Route Javelin console output to ZMK logging system.
-// In Phase 5, this can be upgraded to USB CDC ACM for interactive console.
-
 static char line_buf[256];
 static size_t line_pos = 0;
 

src/platform/zmk_flash_shim.cc

@@ -1,29 +1,8 @@
 #include "flash.h"
 #include "mem.h"
-
-extern "C" {
 #include <zephyr/device.h>
 #include <zephyr/drivers/flash.h>
-#include <zephyr/storage/flash_map.h>
-}
 
-// Flash partition IDs — must match DTS overlay.
-// steno_dict_partition: compiled dictionary (read-only at runtime)
-// steno_user_partition: user dictionary (read-write)
-//
-// Javelin's Flash class uses raw pointers into XIP-mapped flash.
-// On nRF52840, internal flash is memory-mapped at 0x00000000.
-// We convert between XIP pointers and partition offsets.
-
-#ifndef FIXED_PARTITION_ID
-#define FIXED_PARTITION_ID(label) FLASH_AREA_ID(label)
-#endif
-
-// Flash::instance is defined in javelin/flash.cc (high-level methods).
-// We only provide the platform-specific EraseBlockInternal/WriteBlockInternal.
-
-// Convert XIP address to flash device offset.
-// nRF52840 internal flash is at 0x00000000, so pointer == offset.
 static off_t xip_to_offset(const void *ptr) {
   return (off_t)(uintptr_t)ptr;
 }

src/platform/zmk_key_shim.cc

@@ -2,16 +2,8 @@
 #include "key_code.h"
 
 #include <zephyr/kernel.h>
-
-extern "C" {
 #include <zmk/event_manager.h>
 #include <zmk/events/keycode_state_changed.h>
-}
-
-// Javelin KeyCode layout:
-//   0x04-0xE7    → USB HID Keyboard page (0x07)
-//   0xE0-0xE7    → Modifier keys (subset of keyboard page)
-//   0x10000+     → Consumer page (0x0C), usage = value & 0xFFFF
 
 static constexpr uint16_t HID_USAGE_PAGE_KEYBOARD = 0x07;
 static constexpr uint16_t HID_USAGE_PAGE_CONSUMER = 0x0C;
@@ -46,7 +38,4 @@ void Key::Press(KeyCode key) { emit_keycode(key, true); }
 
 void Key::Release(KeyCode key) { emit_keycode(key, false); }
 
-void Key::Flush() {
-  // ZMK processes events asynchronously via its event queue.
-  // Flush is a no-op — events are dispatched as they're raised.
-}
+void Key::Flush() {}