feat: merge display-fix — touch driver, keyboard, WiFi setup UI

Squash-merge of feature/display-fix (27 commits):
- AXS15231B touch driver with coordinate parsing (touch.c/h)
- On-screen keyboard with layout/hit detection (keyboard.c/h)
- WiFi setup state machine + config_add_wifi (wifi_setup.c/h)
- Web-based WiFi setup via captive portal
- Display rotation fix (stride=480), color fixes, DMA byte-swap
- WiFi QR code on BOOT and ERROR screens
- ERROR state transition after WiFi retries exhausted
- Unit tests: test_touch, test_keyboard, test_wifi_setup
- Integration test: wifi_setup.mjs
- E2E test: wifi-setup.spec.mjs
- Per-board hardware locks for flash targets

Conflicts resolved: took master for config/cvm/api/main (more current),
took display-fix for display/axs15231b (newer fixes).

1 files changed, 51 insertions, 0 deletions

diff --git a/main/wifi_setup.h b/main/wifi_setup.h
new file mode 100644
index 0000000..17712d5
--- /dev/null
+++ b/main/wifi_setup.h
@@ -0,0 +1,51 @@
+#ifndef WIFI_SETUP_H
+#define WIFI_SETUP_H
+
+#include "esp_err.h"
+#include <stdint.h>
+#include <stdbool.h>
+
+#define WIFI_SETUP_MAX_APS     20
+#define WIFI_SETUP_MAX_VISIBLE  8
+#define WIFI_SETUP_SSID_LEN    33
+#define WIFI_SETUP_PASS_LEN    64
+
+typedef enum {
+    SETUP_SCAN,
+    SETUP_LIST,
+    SETUP_PASSWORD,
+    SETUP_CONNECTING,
+    SETUP_SUCCESS,
+    SETUP_FAILED,
+    SETUP_CANCELLED
+} setup_state_t;
+
+typedef struct {
+    char ssid[WIFI_SETUP_SSID_LEN];
+    int rssi;
+    bool secured;
+} wifi_ap_info_t;
+
+typedef struct {
+    setup_state_t state;
+    wifi_ap_info_t aps[WIFI_SETUP_MAX_APS];
+    int ap_count;
+    int list_scroll;
+    int selected_ap;
+    char selected_ssid[WIFI_SETUP_SSID_LEN];
+    char connect_ip[16];
+    bool connect_failed_auth;
+} wifi_setup_t;
+
+void wifi_setup_init(wifi_setup_t *setup);
+void wifi_setup_set_aps(wifi_setup_t *setup, const wifi_ap_info_t *aps, int count);
+int wifi_setup_visible_count(const wifi_setup_t *setup);
+const wifi_ap_info_t *wifi_setup_get_visible(const wifi_setup_t *setup, int idx);
+setup_state_t wifi_setup_handle_select(wifi_setup_t *setup, int list_idx);
+setup_state_t wifi_setup_handle_connect(wifi_setup_t *setup);
+setup_state_t wifi_setup_handle_connect_result(wifi_setup_t *setup, bool success, const char *ip);
+setup_state_t wifi_setup_handle_cancel(wifi_setup_t *setup);
+setup_state_t wifi_setup_handle_retry(wifi_setup_t *setup);
+setup_state_t wifi_setup_handle_change_network(wifi_setup_t *setup);
+
+#endif