box3: fix gamebook audio, accents, and crashes

The BOX-3 touch gamebook had several blocking bugs that made the
voiced+foley story packs unusable. This fixes them end to end.

- Stack overflow on story start: gb_play_task kept a 2 KB buffer on
  its 4 KB stack and rebooted the board. Buffers are now static (the
  task is a singleton) and the stack is 6 KB.
- No sound at all: the ES8311 codec was never initialised — main.c
  wrote raw I2S to a muted DAC. Output (and the mic) now go through
  the BSP esp_codec_dev (bsp_audio_codec_speaker/microphone_init,
  esp_codec_dev_write/read). The power amplifier (GPIO46) is also
  forced on and volume set to 100, as the es8311 pa_pin handling did
  not drive it in practice.
- First passage silent: gb_play re-mounted the SD that the gamebook
  had already mounted; the failed second bsp_sdcard_mount tore down
  the VFS so the first fopen failed. Now we open the file first and
  only mount if that fails. A short silence lead-in also primes the
  codec/PA ramp.
- No accents: the gamebook used ASCII-only lv_font_montserrat_14/24.
  Added custom Montserrat fonts (font_fr_14/24, Latin-1 + œŒŸ « » ’ …,
  uncompressed so they render without LV_USE_FONT_COMPRESSED).
- Mic/voice streaming gated behind CONFIG_BOX3_VOICE_STREAMING
  (default off): as a gamebook the BOX-3 needs no mic, and the
  constant codec reads + bridge reconnects interfered with playback
  and flooded the log.

plip_virtual + cmd_exec handle types switched from i2s_chan_handle_t
to esp_codec_dev_handle_t accordingly.

box3_voice/main/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
-    SRCS "main.c" "voice_ws_client.c" "scenario_server.c" "plip_virtual.c" "plip_ui.c" "stimulus.c" "cmd_exec.c"
+    SRCS "main.c" "voice_ws_client.c" "scenario_server.c" "plip_virtual.c" "plip_ui.c" "stimulus.c" "cmd_exec.c" "gamebook.c" "font_fr_14.c" "font_fr_24.c"
     INCLUDE_DIRS "."
     PRIV_REQUIRES
         driver
@@ -13,5 +13,6 @@ idf_component_register(
         spiffs
         scenario_mesh
         espressif__esp-box-3
+        espressif__esp_codec_dev
         lvgl__lvgl
 )

box3_voice/main/Kconfig.projbuild

@@ -1,5 +1,15 @@
 menu "Zacus BOX-3 Voice Configuration"
 
+    config BOX3_VOICE_STREAMING
+        bool "Enable microphone + voice-bridge streaming"
+        default n
+        help
+            Start the mic capture task and the WebSocket voice-bridge client.
+            Off by default: as a touch gamebook the BOX-3 needs no microphone,
+            and the continuous codec reads + bridge reconnect attempts interfere
+            with speaker playback (the first narration clip came out silent) and
+            flood the log. Enable only when using the BOX-3 as a voice device.
+
     config ZACUS_WIFI_SSID
         string "WiFi SSID"
         default "zacus-net"

box3_voice/main/cmd_exec.c

@@ -10,7 +10,7 @@
 //
 // Objective 2 — play: real WAV streaming to I2S
 //   1. Mount SD card (best-effort, /sdcard). Parse WAV header (PCM-16).
-//   2. Stream PCM samples via s_spk_handle (extern, same I2S channel as TTS).
+//   2. Stream PCM samples via the ES8311 codec (esp_codec_dev), same path as TTS.
 //   3. If SD absent / file not found → fallback bip + log.
 //   4. Embedded test cue always available at virtual path "embedded://" or
 //      when the requested path starts with "embedded:" — proves WAV decode + I2S.
@@ -33,16 +33,16 @@
 
 #include "embedded_wav.h"   // s_embedded_wav[], EMBEDDED_WAV_SIZE
 
-// audio_play_tone and s_spk_handle are defined in main.c
+// audio_play_tone is defined in main.c (writes through the ES8311 codec).
 extern void audio_play_tone(float frequency, int duration_ms);
 
-// Speaker I2S handle — obtained from main.c via a weak accessor.
-// We declare a weak symbol here; main.c must define cmd_exec_set_spk_handle()
-// and call it after speaker_init().  Alternatively we use the driver directly.
-#include "driver/i2s_std.h"
-static i2s_chan_handle_t s_spk_handle_local = NULL;
+// Speaker codec (ES8311) handle — obtained from main.c after speaker_init().
+// Audio is streamed through esp_codec_dev so the ES8311 DAC is actually driven
+// (a raw I2S write leaves the codec muted).
+#include "esp_codec_dev.h"
+static esp_codec_dev_handle_t s_spk_handle_local = NULL;
 
-void cmd_exec_set_spk_handle(i2s_chan_handle_t h)
+void cmd_exec_set_spk_handle(esp_codec_dev_handle_t h)
 {
     s_spk_handle_local = h;
 }
@@ -344,13 +344,11 @@ static esp_err_t stream_pcm16(const uint8_t *pcm, size_t byte_len,
         size_t offset = 0;
         while (offset < byte_len) {
             size_t chunk = (byte_len - offset < 1024) ? (byte_len - offset) : 1024;
-            size_t written = 0;
-            esp_err_t ret = i2s_channel_write(s_spk_handle_local,
-                                               pcm + offset, chunk,
-                                               &written, pdMS_TO_TICKS(500));
-            if (ret != ESP_OK) {
-                ESP_LOGW(TAG, "I2S write error: %s", esp_err_to_name(ret));
-                return ret;
+            int ret = esp_codec_dev_write(s_spk_handle_local,
+                                          (void *)(pcm + offset), (int)chunk);
+            if (ret != ESP_CODEC_DEV_OK) {
+                ESP_LOGW(TAG, "codec write error: %d", ret);
+                return ESP_FAIL;
             }
             offset += chunk;
         }
@@ -488,6 +486,93 @@ static void play_task(void *arg)
     vTaskDelete(NULL);
 }
 
+// ─── Gamebook narration player (async, streamed, interruptible) ──────────────
+// One persistent task plays one WAV at a time, streaming straight from the SD
+// in small chunks (no full-file malloc → any length, RAM-safe). A new request
+// or a stop flag breaks the stream so tapping a choice cuts the narration.
+
+static TaskHandle_t   s_gb_task = NULL;
+static char           s_gb_path[160];
+static volatile bool  s_gb_new  = false;
+static volatile bool  s_gb_stop = false;
+
+static void gb_play_task(void *arg)
+{
+    (void) arg;
+    /* The task is a singleton (guarded by s_gb_task), so these large buffers
+     * are kept static — on the stack they ate ~2.1 KB and, together with the
+     * FATFS fread internals + i2s + logging, overflowed the 4 KB stack and
+     * rebooted the board when a story started. */
+    static uint8_t hdr[64];
+    static uint8_t buf[2048];
+    for (;;) {
+        if (!s_gb_new) { vTaskDelay(pdMS_TO_TICKS(20)); continue; }
+        char path[160];
+        strncpy(path, s_gb_path, sizeof(path) - 1);
+        path[sizeof(path) - 1] = '\0';
+        s_gb_new  = false;
+        s_gb_stop = false;
+
+        /* The SD is normally already mounted (the gamebook mounts it at init).
+         * Try the file directly first — re-mounting an already-mounted card via
+         * bsp_sdcard_mount() FAILS and tears down the existing VFS, which made
+         * the very first narration clip silent. Only mount if the open fails. */
+        FILE *f = fopen(path, "rb");
+        if (!f) {
+            ensure_sd_mounted();
+            f = fopen(path, "rb");
+        }
+        if (!f) { ESP_LOGW(TAG, "gb: open %s failed", path); continue; }
+        size_t hn = fread(hdr, 1, sizeof(hdr), f);
+        wav_info_t wi;
+        if (parse_wav_header(hdr, hn, &wi) != ESP_OK || wi.bits_per_sample != 16) {
+            ESP_LOGW(TAG, "gb: bad/usupported WAV %s", path);
+            fclose(f);
+            continue;
+        }
+        fseek(f, wi.data_offset, SEEK_SET);
+        /* Wake the codec/PA before the real audio: after idle the ES8311 mutes
+         * and ramps up on the first write, swallowing the start of the clip.
+         * A short silent lead-in lets the unmute settle so the narration plays
+         * from the very first word. */
+        memset(buf, 0, sizeof(buf));
+        for (int i = 0; i < 4 && s_spk_handle_local && !s_gb_stop && !s_gb_new; i++) {
+            esp_codec_dev_write(s_spk_handle_local, buf, (int)sizeof(buf));
+        }
+        size_t remaining = wi.data_size;
+        ESP_LOGI(TAG, "gb: play %s (%u B, %u Hz)", path,
+                 (unsigned)wi.data_size, (unsigned)wi.sample_rate);
+        while (remaining > 0 && !s_gb_stop && !s_gb_new) {
+            size_t want = remaining < sizeof(buf) ? remaining : sizeof(buf);
+            size_t got = fread(buf, 1, want, f);
+            if (got == 0) break;
+            if (s_spk_handle_local) {
+                esp_codec_dev_write(s_spk_handle_local, buf, (int)got);
+            }
+            remaining -= got;
+        }
+        fclose(f);
+    }
+}
+
+void cmd_exec_play_file_async(const char *path)
+{
+    if (!path || !path[0]) return;
+    strncpy(s_gb_path, path, sizeof(s_gb_path) - 1);
+    s_gb_path[sizeof(s_gb_path) - 1] = '\0';
+    s_gb_stop = true;    // interrupt whatever is playing
+    s_gb_new  = true;    // … and pick up the new clip
+    if (!s_gb_task) {
+        xTaskCreate(gb_play_task, "gb_play", 6144, NULL, 4, &s_gb_task);
+    }
+}
+
+void cmd_exec_stop_play(void)
+{
+    s_gb_stop = true;
+    s_gb_new  = false;
+}
+
 // ─── op=play ──────────────────────────────────────────────────────────────────
 
 static esp_err_t exec_play(const cJSON *a)

box3_voice/main/cmd_exec.h

@@ -18,7 +18,7 @@
 
 #include <stddef.h>
 #include "esp_err.h"
-#include "driver/i2s_std.h"
+#include "esp_codec_dev.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,9 +30,17 @@ extern "C" {
 // ESP_ERR_NOT_SUPPORTED for unknown ops (all logged, no crash).
 esp_err_t cmd_exec_handle(const char *data, size_t len);
 
-// Provide the speaker I2S channel handle so exec_play() can stream audio.
+// Provide the speaker codec (ES8311) handle so exec_play() can stream audio.
 // Must be called from main.c after speaker_init(), before any CMD arrives.
-void cmd_exec_set_spk_handle(i2s_chan_handle_t h);
+void cmd_exec_set_spk_handle(esp_codec_dev_handle_t h);
+
+// Play a 16 kHz mono 16-bit WAV from the SD asynchronously, streamed in chunks
+// (RAM-safe for long narration) and INTERRUPTIBLE: a new call stops the current
+// clip and starts the new one. Used by the touch gamebook for passage audio.
+void cmd_exec_play_file_async(const char *path);
+
+// Stop the async narration (no-op if nothing is playing).
+void cmd_exec_stop_play(void);
 
 #ifdef __cplusplus
 }

box3_voice/main/gamebook.c

@@ -0,0 +1,238 @@
+// gamebook.c — see gamebook.h. Touch CYOA for the ESP32-S3-BOX-3.
+#include "gamebook.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cJSON.h"
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+
+#include "bsp/esp-bsp.h"
+#include "lvgl.h"
+#include "cmd_exec.h"   // async WAV narration player
+
+static const char *TAG = "gamebook";
+
+// Custom fonts with French glyphs (ASCII + Latin-1 + ’ + …). See main/font_fr_*.c.
+LV_FONT_DECLARE(font_fr_14);
+LV_FONT_DECLARE(font_fr_24);
+
+#define GB_DIR      "/sdcard/gamebook"
+#define GB_LIBRARY  GB_DIR "/library.json"
+#define GB_JSON_MAX (256 * 1024)        // expanded books are ~80 KB of JSON
+
+// Colours (Workbench-ish palette).
+#define COL_BG     0x101820
+#define COL_TITLE  0xFFCC55
+#define COL_TEXT   0xF0F0F0
+#define COL_BTN    0x224466
+
+static cJSON   *s_lib_root  = NULL;     // owns library.json
+static cJSON   *s_lib       = NULL;     // borrowed: root->"library"
+static int      s_lib_n     = 0;
+
+static cJSON   *s_book      = NULL;     // owns the current <id>.json
+static cJSON   *s_passages  = NULL;     // borrowed: book->"passages"
+
+static lv_obj_t *s_root     = NULL;     // scrollable full-screen column
+
+// ── PSRAM allocators for cJSON (book trees are large) ───────────────────────
+static void *gb_malloc(size_t sz) { return heap_caps_malloc(sz, MALLOC_CAP_SPIRAM); }
+static void  gb_free(void *p)      { heap_caps_free(p); }
+
+static cJSON *load_json(const char *path)
+{
+    FILE *f = fopen(path, "rb");
+    if (!f) { ESP_LOGW(TAG, "open %s failed", path); return NULL; }
+    fseek(f, 0, SEEK_END);
+    long sz = ftell(f);
+    rewind(f);
+    if (sz <= 0 || sz > GB_JSON_MAX) { fclose(f); ESP_LOGW(TAG, "%s size %ld", path, sz); return NULL; }
+    char *buf = heap_caps_malloc((size_t)sz + 1, MALLOC_CAP_SPIRAM);
+    if (!buf) { fclose(f); return NULL; }
+    size_t rd = fread(buf, 1, (size_t)sz, f);
+    fclose(f);
+    buf[rd] = '\0';
+    cJSON *root = cJSON_Parse(buf);
+    heap_caps_free(buf);
+    if (!root) ESP_LOGW(TAG, "malformed JSON: %s", path);
+    return root;
+}
+
+// ── Root container (created once, cleared per view) ─────────────────────────
+// All UI functions below assume the LVGL lock is held (gamebook_init takes it;
+// button callbacks already run inside the LVGL task / lock).
+static void ensure_root(void)
+{
+    if (s_root) { lv_obj_clean(s_root); return; }
+    lv_obj_t *scr = lv_screen_active();
+    s_root = lv_obj_create(scr);
+    lv_obj_set_size(s_root, LV_PCT(100), LV_PCT(100));
+    lv_obj_set_pos(s_root, 0, 0);
+    lv_obj_set_style_bg_color(s_root, lv_color_hex(COL_BG), 0);
+    lv_obj_set_style_bg_opa(s_root, LV_OPA_COVER, 0);
+    lv_obj_set_style_border_width(s_root, 0, 0);
+    lv_obj_set_style_radius(s_root, 0, 0);
+    lv_obj_set_style_pad_all(s_root, 8, 0);
+    lv_obj_set_style_pad_row(s_root, 8, 0);
+    lv_obj_set_flex_flow(s_root, LV_FLEX_FLOW_COLUMN);
+    lv_obj_set_scroll_dir(s_root, LV_DIR_VER);
+}
+
+static lv_obj_t *add_title(const char *txt)
+{
+    lv_obj_t *l = lv_label_create(s_root);
+    lv_obj_set_style_text_font(l, &font_fr_24, 0);
+    lv_obj_set_style_text_color(l, lv_color_hex(COL_TITLE), 0);
+    lv_label_set_long_mode(l, LV_LABEL_LONG_WRAP);
+    lv_obj_set_width(l, LV_PCT(100));
+    lv_label_set_text(l, txt);
+    return l;
+}
+
+static lv_obj_t *add_text(const char *txt)
+{
+    lv_obj_t *l = lv_label_create(s_root);
+    lv_obj_set_style_text_font(l, &font_fr_14, 0);
+    lv_obj_set_style_text_color(l, lv_color_hex(COL_TEXT), 0);
+    lv_label_set_long_mode(l, LV_LABEL_LONG_WRAP);
+    lv_obj_set_width(l, LV_PCT(100));
+    lv_label_set_text(l, txt);
+    return l;
+}
+
+static lv_obj_t *add_button(const char *txt, lv_event_cb_t cb, void *user)
+{
+    lv_obj_t *b = lv_button_create(s_root);
+    lv_obj_set_width(b, LV_PCT(100));
+    lv_obj_set_style_bg_color(b, lv_color_hex(COL_BTN), 0);
+    lv_obj_set_style_pad_all(b, 10, 0);
+    lv_obj_add_event_cb(b, cb, LV_EVENT_CLICKED, user);
+    lv_obj_t *l = lv_label_create(b);
+    lv_obj_set_style_text_font(l, &font_fr_14, 0);
+    lv_label_set_long_mode(l, LV_LABEL_LONG_WRAP);
+    lv_obj_set_width(l, LV_PCT(100));
+    lv_label_set_text(l, txt);
+    return b;
+}
+
+// Forward decls
+static void show_library(void);
+static void enter_passage(const char *pid);
+
+static void tile_cb(lv_event_t *e);
+static void choice_cb(lv_event_t *e);
+static void menu_cb(lv_event_t *e);
+
+// ── Library menu ────────────────────────────────────────────────────────────
+static void show_library(void)
+{
+    cmd_exec_stop_play();   // silence any passage narration
+    if (s_book) { cJSON_Delete(s_book); s_book = NULL; s_passages = NULL; }
+    ensure_root();
+    add_title("Choisis ton histoire");
+    for (int i = 0; i < s_lib_n; i++) {
+        const cJSON *t = cJSON_GetObjectItem(cJSON_GetArrayItem(s_lib, i), "title");
+        add_button(cJSON_IsString(t) ? t->valuestring : "?",
+                   tile_cb, (void *)(intptr_t)i);
+    }
+    lv_obj_scroll_to_y(s_root, 0, LV_ANIM_OFF);
+}
+
+// ── Passage ─────────────────────────────────────────────────────────────────
+static void enter_passage(const char *pid)
+{
+    const cJSON *p = cJSON_GetObjectItem(s_passages, pid);
+    if (!cJSON_IsObject(p)) { ESP_LOGW(TAG, "passage '%s' missing", pid); return; }
+    const cJSON *screen  = cJSON_GetObjectItem(p, "screen");
+    const cJSON *text    = cJSON_GetObjectItem(p, "text");
+    const cJSON *choices = cJSON_GetObjectItem(p, "choices");
+
+    ensure_root();
+    add_title(cJSON_IsString(screen) ? screen->valuestring : "");
+    add_text(cJSON_IsString(text) ? text->valuestring : "");
+
+    // Narration: play this passage's WAV from the SD if the pack has audio.
+    // Interruptible — tapping a choice cuts it and plays the next passage.
+    const cJSON *wav = cJSON_GetObjectItem(p, "wav");
+    if (cJSON_IsString(wav) && wav->valuestring[0]) {
+        char path[160];
+        snprintf(path, sizeof(path), "%s/%s", GB_DIR, wav->valuestring);
+        cmd_exec_play_file_async(path);
+    }
+    int n = cJSON_IsArray(choices) ? cJSON_GetArraySize(choices) : 0;
+    if (n == 0) {
+        add_button("Revenir au menu", menu_cb, NULL);
+    } else {
+        for (int i = 0; i < n; i++) {
+            const cJSON *c = cJSON_GetArrayItem(choices, i);
+            const cJSON *lbl = cJSON_GetObjectItem(c, "label");
+            const cJSON *g   = cJSON_GetObjectItem(c, "goto");
+            // goto valuestring stays valid while s_book is alive → use as user_data
+            add_button(cJSON_IsString(lbl) ? lbl->valuestring : "?",
+                       choice_cb, cJSON_IsString(g) ? g->valuestring : NULL);
+        }
+    }
+    lv_obj_scroll_to_y(s_root, 0, LV_ANIM_OFF);
+    ESP_LOGI(TAG, "passage '%s' (%d choices)", pid, n);
+}
+
+static void load_book(int idx)
+{
+    const cJSON *e = cJSON_GetArrayItem(s_lib, idx);
+    const cJSON *file = cJSON_GetObjectItem(e, "book");
+    if (!cJSON_IsString(file)) return;
+    char path[128];
+    snprintf(path, sizeof(path), "%s/%s", GB_DIR, file->valuestring);
+    cJSON *book = load_json(path);
+    if (!book) return;
+    const cJSON *passages = cJSON_GetObjectItem(book, "passages");
+    const cJSON *start = cJSON_GetObjectItem(book, "start");
+    if (!cJSON_IsObject(passages) || !cJSON_IsString(start)) {
+        cJSON_Delete(book); return;
+    }
+    if (s_book) cJSON_Delete(s_book);
+    s_book = book;
+    s_passages = (cJSON *)passages;
+    ESP_LOGI(TAG, "load book #%d @ '%s'", idx, start->valuestring);
+    enter_passage(start->valuestring);
+}
+
+// ── Touch callbacks (run inside the LVGL task → lock already held) ───────────
+static void tile_cb(lv_event_t *e)   { load_book((int)(intptr_t)lv_event_get_user_data(e)); }
+static void menu_cb(lv_event_t *e)   { (void)e; show_library(); }
+static void choice_cb(lv_event_t *e)
+{
+    const char *goto_id = (const char *)lv_event_get_user_data(e);
+    if (goto_id) enter_passage(goto_id);
+}
+
+// ── Public init ─────────────────────────────────────────────────────────────
+void gamebook_init(void)
+{
+    cJSON_Hooks hooks = { .malloc_fn = gb_malloc, .free_fn = gb_free };
+    cJSON_InitHooks(&hooks);   // keep the big book trees in PSRAM
+
+    if (bsp_sdcard_mount() != ESP_OK) {
+        ESP_LOGW(TAG, "no SD card — gamebook disabled");
+        return;
+    }
+    s_lib_root = load_json(GB_LIBRARY);
+    if (!s_lib_root) { ESP_LOGW(TAG, "no library.json — gamebook disabled"); return; }
+    s_lib = cJSON_GetObjectItem(s_lib_root, "library");
+    if (!cJSON_IsArray(s_lib) || cJSON_GetArraySize(s_lib) == 0) {
+        cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL;
+        ESP_LOGW(TAG, "empty library");
+        return;
+    }
+    s_lib_n = cJSON_GetArraySize(s_lib);
+
+    bsp_display_brightness_set(80);
+    if (bsp_display_lock(1000)) {
+        show_library();
+        bsp_display_unlock();
+    }
+    ESP_LOGI(TAG, "touch gamebook up (%d stories)", s_lib_n);
+}

box3_voice/main/gamebook.h

@@ -0,0 +1,27 @@
+#pragma once
+// gamebook — "livre dont tu es le héros" TACTILE pour l'ESP32-S3-BOX-3.
+//
+// Écran 320x240 + tactile : on lit le passage à l'écran et on TOUCHE un bouton
+// pour choisir. Réutilise le pack gamebook du master sur la SD :
+//   /sdcard/gamebook/{library.json, <id>.json}
+// où chaque passage porte {screen, text, choices:[{label, goto}]} (le champ
+// "wav" éventuel est ignoré — version texte/tactile, pas d'audio requis).
+//
+// S'appuie sur la stack LVGL déjà démarrée par bsp_display_start() : on
+// construit une UUI (menu d'histoires en liste, puis pages tactiles) et la
+// navigation se fait dans les callbacks de boutons LVGL. 100% local, hors-ligne.
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Monte la SD, charge la bibliothèque et affiche le menu tactile des histoires.
+// À appeler une fois depuis app_main, après bsp_display_start() et le serveur
+// de fichiers (pour que la SD soit accessible). No-op si aucun pack présent.
+void gamebook_init(void);
+
+#ifdef __cplusplus
+}
+#endif

box3_voice/main/main.c

@@ -28,6 +28,7 @@
 #include "scenario_server.h"
 #include "plip_virtual.h"
 #include "plip_ui.h"
+#include "gamebook.h"
 #include "stimulus.h"
 #include "scenario_mesh.h"
 #include "cmd_exec.h"
@@ -39,8 +40,12 @@ static const char *TAG = "zacus-voice";
 
 /* --------------- Shared state --------------- */
 
-static i2s_chan_handle_t s_spk_handle = NULL;   /* Speaker TX channel */
-static i2s_chan_handle_t s_mic_handle = NULL;   /* Microphone RX channel */
+/* Audio now goes through the ES8311 (speaker) / ES7210 (mic) codecs via the
+ * BSP + esp_codec_dev. bsp_audio_init() owns the single shared I2S port; we
+ * must NOT create our own raw I2S channels (that left the ES8311 DAC unpowered
+ * and the speaker silent). */
+static esp_codec_dev_handle_t s_spk_codec = NULL;   /* ES8311 output (DAC) */
+static esp_codec_dev_handle_t s_mic_codec = NULL;   /* ES7210 input (ADC)  */
 static volatile bool     s_wifi_connected = false;
 static volatile bool     s_voice_streaming = false;
 
@@ -113,11 +118,10 @@ static esp_err_t wifi_init_sta(void)
 // generator can sequence a melody for the master's microphone.
 void audio_play_tone(float frequency, int duration_ms)
 {
-    if (!s_spk_handle || duration_ms <= 0) return;
+    if (!s_spk_codec || duration_ms <= 0) return;
     const int total_samples = AUDIO_SAMPLE_RATE * duration_ms / 1000;
     const float amplitude = 16000.0f;
     int16_t buffer[256];
-    size_t bytes_written = 0;
     int sample_idx = 0;
     while (sample_idx < total_samples) {
         int chunk = (total_samples - sample_idx < 256)
@@ -126,29 +130,27 @@ void audio_play_tone(float frequency, int duration_ms)
             float t = (float)(sample_idx + i) / (float)AUDIO_SAMPLE_RATE;
             buffer[i] = (int16_t)(amplitude * sinf(2.0f * M_PI * frequency * t));
         }
-        i2s_channel_write(s_spk_handle, buffer, chunk * sizeof(int16_t),
-                          &bytes_written, portMAX_DELAY);
+        esp_codec_dev_write(s_spk_codec, buffer, chunk * sizeof(int16_t));
         sample_idx += chunk;
     }
 }
 
 static void audio_test_tone(void)
 {
-    if (!s_spk_handle) {
+    if (!s_spk_codec) {
         ESP_LOGW(TAG, "Speaker not initialized, skipping test tone");
         return;
     }
 
     ESP_LOGI(TAG, "Playing 440 Hz test tone (1 second)...");
 
-    /* Generate 1 second of 440 Hz sine wave using persistent speaker handle */
+    /* Generate 1 second of 440 Hz sine wave through the ES8311 codec */
     const int duration_ms = 1000;
     const int total_samples = AUDIO_SAMPLE_RATE * duration_ms / 1000;
     const float frequency = 440.0f;
     const float amplitude = 16000.0f;
 
     int16_t buffer[256];
-    size_t bytes_written = 0;
     int sample_idx = 0;
 
     while (sample_idx < total_samples) {
@@ -157,7 +159,7 @@ static void audio_test_tone(void)
             float t = (float)(sample_idx + i) / (float)AUDIO_SAMPLE_RATE;
             buffer[i] = (int16_t)(amplitude * sinf(2.0f * M_PI * frequency * t));
         }
-        i2s_channel_write(s_spk_handle, buffer, chunk * sizeof(int16_t), &bytes_written, portMAX_DELAY);
+        esp_codec_dev_write(s_spk_codec, buffer, chunk * sizeof(int16_t));
         sample_idx += chunk;
     }
 
@@ -173,15 +175,13 @@ static void tts_audio_callback(const uint8_t *data, size_t len)
      * Called from WebSocket event context with incoming TTS PCM16 data.
      * Write directly to the speaker I2S channel.
      */
-    if (!s_spk_handle || len == 0) {
+    if (!s_spk_codec || len == 0) {
         return;
     }
 
-    size_t bytes_written = 0;
-    esp_err_t ret = i2s_channel_write(s_spk_handle, data, len,
-                                       &bytes_written, pdMS_TO_TICKS(200));
-    if (ret != ESP_OK) {
-        ESP_LOGW(TAG, "TTS write to speaker failed: %s", esp_err_to_name(ret));
+    int ret = esp_codec_dev_write(s_spk_codec, (void *)data, (int)len);
+    if (ret != ESP_CODEC_DEV_OK) {
+        ESP_LOGW(TAG, "TTS write to speaker failed: %d", ret);
     }
 }
 
@@ -189,34 +189,42 @@ static void tts_audio_callback(const uint8_t *data, size_t len)
 
 static esp_err_t speaker_init(void)
 {
-    /* Enable power amplifier */
+    /* Init the ES8311 output codec via the BSP. This also runs bsp_audio_init()
+     * (shared duplex I2S port) + bsp_i2c_init() and configures the power
+     * amplifier (BSP_POWER_AMP_IO = GPIO46). The ES8311 DAC is configured over
+     * I2C here — without this the speaker stays muted no matter what we push on
+     * I2S. */
+    s_spk_codec = bsp_audio_codec_speaker_init();
+    if (!s_spk_codec) {
+        ESP_LOGE(TAG, "bsp_audio_codec_speaker_init failed — speaker unavailable");
+        return ESP_FAIL;
+    }
+
+    /* All speaker audio in this app is 16 kHz / 16-bit / mono PCM. */
+    esp_codec_dev_sample_info_t fs = {
+        .bits_per_sample = AUDIO_BITS,
+        .channel         = AUDIO_CHANNELS,
+        .channel_mask    = 0,
+        .sample_rate     = AUDIO_SAMPLE_RATE,
+        .mclk_multiple   = 0,
+    };
+    int ret = esp_codec_dev_open(s_spk_codec, &fs);
+    if (ret != ESP_CODEC_DEV_OK) {
+        ESP_LOGE(TAG, "esp_codec_dev_open (speaker) failed: %d", ret);
+        return ESP_FAIL;
+    }
+
+    /* Output volume 0..100. */
+    esp_codec_dev_set_out_vol(s_spk_codec, 100);
+
+    /* Belt-and-suspenders: the es8311 driver is configured with pa_pin=GPIO46
+     * (pa_reverted=false) and should raise it on open, but the speaker stays
+     * silent in practice — force the power amplifier on explicitly. */
     gpio_set_direction(BOX3_PA_ENABLE, GPIO_MODE_OUTPUT);
     gpio_set_level(BOX3_PA_ENABLE, 1);
 
-    i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_0, I2S_ROLE_MASTER);
-    ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, &s_spk_handle, NULL));
-
-    i2s_std_config_t std_cfg = {
-        .clk_cfg  = I2S_STD_CLK_DEFAULT_CONFIG(AUDIO_SAMPLE_RATE),
-        .slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_MONO),
-        .gpio_cfg = {
-            .mclk = BOX3_I2S_MCLK,
-            .bclk = BOX3_I2S_BCLK,
-            .ws   = BOX3_I2S_WS,
-            .dout = BOX3_I2S_DOUT,
-            .din  = I2S_GPIO_UNUSED,
-            .invert_flags = {
-                .mclk_inv = false,
-                .bclk_inv = false,
-                .ws_inv   = false,
-            },
-        },
-    };
-
-    ESP_ERROR_CHECK(i2s_channel_init_std_mode(s_spk_handle, &std_cfg));
-    ESP_ERROR_CHECK(i2s_channel_enable(s_spk_handle));
-
-    ESP_LOGI(TAG, "Speaker I2S initialized (I2S_NUM_0)");
+    ESP_LOGI(TAG, "Speaker codec (ES8311) initialized @ %d Hz, vol=100, PA on",
+             AUDIO_SAMPLE_RATE);
     return ESP_OK;
 }
 
@@ -226,43 +234,45 @@ static void mic_monitor_task(void *arg)
 {
     ESP_LOGI(TAG, "Starting mic capture task...");
 
-    i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(I2S_NUM_1, I2S_ROLE_MASTER);
-    ESP_ERROR_CHECK(i2s_new_channel(&chan_cfg, NULL, &s_mic_handle));
+    /* Init the ES7210 input codec via the BSP. It shares the same I2S port
+     * (already created by speaker_init -> bsp_audio_init); creating a separate
+     * raw I2S channel here would conflict with that shared port. */
+    s_mic_codec = bsp_audio_codec_microphone_init();
+    if (!s_mic_codec) {
+        ESP_LOGE(TAG, "bsp_audio_codec_microphone_init failed — mic unavailable");
+        vTaskDelete(NULL);
+        return;
+    }
 
-    i2s_std_config_t std_cfg = {
-        .clk_cfg  = I2S_STD_CLK_DEFAULT_CONFIG(AUDIO_SAMPLE_RATE),
-        .slot_cfg = I2S_STD_PHILIPS_SLOT_DEFAULT_CONFIG(I2S_DATA_BIT_WIDTH_16BIT, I2S_SLOT_MODE_MONO),
-        .gpio_cfg = {
-            .mclk = I2S_GPIO_UNUSED,
-            .bclk = BOX3_I2S_BCLK,
-            .ws   = BOX3_I2S_WS,
-            .dout = I2S_GPIO_UNUSED,
-            .din  = BOX3_I2S_DIN,
-            .invert_flags = {
-                .mclk_inv = false,
-                .bclk_inv = false,
-                .ws_inv   = false,
-            },
-        },
+    esp_codec_dev_sample_info_t fs = {
+        .bits_per_sample = AUDIO_BITS,
+        .channel         = AUDIO_CHANNELS,
+        .channel_mask    = 0,
+        .sample_rate     = AUDIO_SAMPLE_RATE,
+        .mclk_multiple   = 0,
     };
-
-    ESP_ERROR_CHECK(i2s_channel_init_std_mode(s_mic_handle, &std_cfg));
-    ESP_ERROR_CHECK(i2s_channel_enable(s_mic_handle));
+    int oret = esp_codec_dev_open(s_mic_codec, &fs);
+    if (oret != ESP_CODEC_DEV_OK) {
+        ESP_LOGE(TAG, "esp_codec_dev_open (mic) failed: %d", oret);
+        vTaskDelete(NULL);
+        return;
+    }
+    /* ES7210 input gain (dB). 30 dB is a sane default for the BOX-3 mic array. */
+    esp_codec_dev_set_in_gain(s_mic_codec, 30.0f);
 
     int16_t buffer[AUDIO_FRAME_SAMPLES];
-    size_t bytes_read = 0;
     int rms_log_counter = 0;
 
     while (1) {
-        esp_err_t ret = i2s_channel_read(s_mic_handle, buffer,
-                                          AUDIO_FRAME_SAMPLES * sizeof(int16_t),
-                                          &bytes_read, pdMS_TO_TICKS(1000));
-        if (ret != ESP_OK) {
-            ESP_LOGW(TAG, "Mic read error: %s", esp_err_to_name(ret));
+        int ret = esp_codec_dev_read(s_mic_codec, buffer,
+                                     AUDIO_FRAME_SAMPLES * sizeof(int16_t));
+        if (ret != ESP_CODEC_DEV_OK) {
+            ESP_LOGW(TAG, "Mic read error: %d", ret);
+            vTaskDelay(pdMS_TO_TICKS(20));
             continue;
         }
 
-        int samples = bytes_read / sizeof(int16_t);
+        int samples = AUDIO_FRAME_SAMPLES;
 
         /* If voice streaming is active, send PCM to bridge */
         if (s_voice_streaming) {
@@ -422,14 +432,19 @@ void app_main(void)
     /* Initialize persistent speaker output (used for test tone + TTS playback) */
     speaker_init();
 
-    /* Pass speaker handle to CMD executor for real WAV playback */
-    cmd_exec_set_spk_handle(s_spk_handle);
+    /* Pass speaker codec handle to CMD executor for real WAV playback */
+    cmd_exec_set_spk_handle(s_spk_codec);
 
     /* Play test tone to verify audio output */
     audio_test_tone();
 
-    /* Start mic capture task (reads I2S mic, streams to bridge when active) */
+#if CONFIG_BOX3_VOICE_STREAMING
+    /* Start mic capture task (reads I2S mic, streams to bridge when active).
+     * Off by default: as a touch gamebook the BOX-3 needs no mic, and the
+     * continuous codec reads + bridge reconnects interfered with the speaker
+     * (the first narration clip came out silent) and spammed the log. */
     xTaskCreatePinnedToCore(mic_monitor_task, "mic_capture", 4096, NULL, 5, NULL, 1);
+#endif
 
     /* Start button handler (BOOT button toggles voice streaming) */
     xTaskCreate(button_task, "button", 2048, NULL, 4, NULL);
@@ -438,8 +453,10 @@ void app_main(void)
     ESP_LOGI(TAG, "Connecting to WiFi...");
     wifi_init_sta();
 
+#if CONFIG_BOX3_VOICE_STREAMING
     /* Start voice bridge connection task (waits for WiFi, then connects WS) */
     xTaskCreate(voice_bridge_task, "voice_bridge", 6144, NULL, 5, NULL);
+#endif
 
     /* Start the scenario hot-load HTTP server (POST /game/scenario).
      * httpd_start binds to all netifs — works as soon as the WiFi STA has an IP. */
@@ -449,7 +466,7 @@ void app_main(void)
         /* Phone-less PLIP annex: same REST contract as PLIP_FIRMWARE
          * (POST /ring /stop /play, GET /status), ring on the speaker,
          * BOOT button as the virtual hook switch. */
-        if (plip_virtual_init(scenario_server_handle(), s_spk_handle) != ESP_OK) {
+        if (plip_virtual_init(scenario_server_handle(), s_spk_codec) != ESP_OK) {
             ESP_LOGW(TAG, "plip_virtual_init failed — virtual phone unavailable");
         } else if (plip_ui_init() != ESP_OK) {
             /* REST/ESP-NOW phone still works headless if the UI fails. */
@@ -463,6 +480,11 @@ void app_main(void)
         } else {
             ESP_LOGW(TAG, "stimulus_init failed — QR/melody generator off");
         }
+
+        /* Touch gamebook: if a story pack is on the SD (/sdcard/gamebook/),
+         * take over the screen with a tap-to-choose "livre dont tu es le
+         * héros". No-op (and the phone UI stays) when no pack is present. */
+        gamebook_init();
     }
 
     /* Start the ESP-NOW receiver so the master can relay scenarios to us even

box3_voice/main/plip_virtual.c

@@ -38,7 +38,7 @@ typedef struct {
     char reason[32];  /* "pickup" | "hangup" | "ring_timeout" | "dial:<n>" */
 } hook_event_t;
 
-static i2s_chan_handle_t        s_spk;
+static esp_codec_dev_handle_t   s_spk;
 static volatile plip_hook_state_t s_state = PLIP_HOOK_ON;
 static volatile bool            s_ring_stop = false;
 static TaskHandle_t             s_ring_task = NULL;
@@ -107,7 +107,6 @@ static void ring_burst(int duration_ms)
 {
     const int total = AUDIO_SAMPLE_RATE * duration_ms / 1000;
     int16_t buffer[256];
-    size_t written = 0;
     int idx = 0;
     while (idx < total && !s_ring_stop) {
         int chunk = (total - idx < 256) ? (total - idx) : 256;
@@ -116,8 +115,9 @@ static void ring_burst(int duration_ms)
             buffer[i] = (int16_t) (RING_AMPLITUDE *
                                    sinf(2.0f * (float) M_PI * RING_FREQ_HZ * t));
         }
-        i2s_channel_write(s_spk, buffer, chunk * sizeof(int16_t), &written,
-                          pdMS_TO_TICKS(500));
+        if (s_spk) {
+            esp_codec_dev_write(s_spk, buffer, chunk * sizeof(int16_t));
+        }
         idx += chunk;
     }
 }
@@ -279,7 +279,7 @@ plip_hook_state_t plip_virtual_state(void)
     return s_state;
 }
 
-esp_err_t plip_virtual_init(httpd_handle_t server, i2s_chan_handle_t spk)
+esp_err_t plip_virtual_init(httpd_handle_t server, esp_codec_dev_handle_t spk)
 {
     if (!server || !spk) return ESP_ERR_INVALID_ARG;
     s_spk = spk;

box3_voice/main/plip_virtual.h

@@ -16,7 +16,7 @@
 #pragma once
 
 #include <stdbool.h>
-#include "driver/i2s_std.h"
+#include "esp_codec_dev.h"
 #include "esp_err.h"
 #include "esp_http_server.h"
 
@@ -34,7 +34,7 @@ typedef enum {
 // Register the REST handlers on `server` and keep `spk` for the ring tone.
 // Call once after scenario_server_start(); the speaker channel must be
 // enabled (speaker_init() in main.c).
-esp_err_t plip_virtual_init(httpd_handle_t server, i2s_chan_handle_t spk);
+esp_err_t plip_virtual_init(httpd_handle_t server, esp_codec_dev_handle_t spk);
 
 // Forward a BOOT-button press. Returns true when the press was consumed as
 // a hook transition (pickup/hangup) — the caller should then skip its own

idf_zacus/components/display_ui/display_ui.cpp

@@ -248,6 +248,30 @@ static bool     s_browser_isdir[BROWSER_MAX_ENTRIES];
 static uint8_t  s_browser_count = 0;
 static volatile uint8_t s_browser_sel = 0;
 static volatile bool s_browser_open = false;
+
+// ── Gamebook view ("livre dont vous êtes le héros") ─────────────────────────
+static lv_obj_t *s_scr_gamebook;
+static lv_obj_t *s_gb_title;          // page title, top
+static lv_obj_t *s_gb_body;           // full passage text, wrapped
+static lv_obj_t *s_gb_menu;           // choice lines, bottom
+static volatile bool s_gamebook_open = false;
+static lv_obj_t *s_gb_body_cont;      // scrollable container holding s_gb_body
+static char s_gb_title_buf[64];
+static char s_gb_body_buf[1100];
+static char s_gb_menu_buf[160];
+static volatile int  s_gb_scroll_req = 0;   // pending scroll: +pages down / -pages up
+static volatile bool s_gb_scroll_home = false;  // reset scroll to top on new passage
+
+// ── Gamebook library (tile grid) ────────────────────────────────────────────
+#define LIB_TILES 6
+static lv_obj_t *s_scr_library;
+static lv_obj_t *s_lib_tile[LIB_TILES];
+static lv_obj_t *s_lib_label[LIB_TILES];
+static volatile bool s_library_open = false;
+static char s_lib_title_buf[LIB_TILES][48];
+static int  s_lib_count_buf = 0;
+static int  s_lib_sel_buf   = 0;
+
 static volatile bool s_browser_reload = false;
 
 // ─── Intro — faithful port of the original cracktro ──────────────────────────
@@ -761,6 +785,93 @@ scroller:
     lv_obj_set_pos(s_intro_scroll, sx, sy);
 }
 
+static void build_library_screen(void) {
+    s_scr_library = lv_obj_create(NULL);
+    lv_obj_set_style_bg_color(s_scr_library, lv_color_hex(0x000000), 0);
+    lv_obj_set_style_bg_opa(s_scr_library, LV_OPA_COVER, 0);
+    lv_obj_clear_flag(s_scr_library, LV_OBJ_FLAG_SCROLLABLE);
+
+    lv_obj_t *hdr = lv_label_create(s_scr_library);
+    lv_obj_set_style_text_color(hdr, lv_color_hex(COL_CODE), 0);
+    lv_obj_set_style_text_font(hdr, &lv_font_montserrat_14, 0);
+    lv_label_set_text(hdr, "Choisis ton histoire");
+    lv_obj_align(hdr, LV_ALIGN_TOP_MID, 0, 4);
+
+    for (int i = 0; i < LIB_TILES; i++) {
+        int col = i % 2, row = i / 2;
+        lv_obj_t *t = lv_obj_create(s_scr_library);
+        lv_obj_set_size(t, 228, 84);
+        lv_obj_set_pos(t, 8 + col * 236, 26 + row * 94);
+        lv_obj_set_style_radius(t, 8, 0);
+        lv_obj_set_style_bg_color(t, lv_color_hex(0x101820), 0);
+        lv_obj_set_style_bg_opa(t, LV_OPA_COVER, 0);
+        lv_obj_set_style_border_width(t, 2, 0);
+        lv_obj_set_style_border_color(t, lv_color_hex(0x445566), 0);
+        lv_obj_set_style_pad_all(t, 6, 0);
+        lv_obj_clear_flag(t, LV_OBJ_FLAG_SCROLLABLE);
+        lv_obj_t *l = lv_label_create(t);
+        lv_obj_set_style_text_color(l, lv_color_hex(COL_VALUE), 0);
+        lv_obj_set_style_text_font(l, &lv_font_montserrat_14, 0);
+        lv_label_set_long_mode(l, LV_LABEL_LONG_WRAP);
+        lv_obj_set_width(l, 208);
+        lv_obj_set_style_text_align(l, LV_TEXT_ALIGN_CENTER, 0);
+        lv_label_set_text(l, "");
+        lv_obj_center(l);
+        s_lib_tile[i] = t;
+        s_lib_label[i] = l;
+    }
+}
+
+static void build_gamebook_screen(void) {
+    s_scr_gamebook = lv_obj_create(NULL);
+    lv_obj_set_style_bg_color(s_scr_gamebook, lv_color_hex(0x000000), 0);
+    lv_obj_set_style_bg_opa(s_scr_gamebook, LV_OPA_COVER, 0);
+
+    // Compact title line at the very top.
+    s_gb_title = lv_label_create(s_scr_gamebook);
+    lv_obj_set_style_text_color(s_gb_title, lv_color_hex(COL_CODE), 0);
+    lv_obj_set_style_text_font(s_gb_title, &lv_font_montserrat_14, 0);
+    lv_label_set_long_mode(s_gb_title, LV_LABEL_LONG_DOT);
+    lv_obj_set_width(s_gb_title, DUI_HOR_RES - 12);
+    lv_obj_set_style_text_align(s_gb_title, LV_TEXT_ALIGN_CENTER, 0);
+    lv_label_set_text(s_gb_title, "");
+    lv_obj_align(s_gb_title, LV_ALIGN_TOP_MID, 0, 4);
+
+    // Choice selector: a single line pinned at the very bottom. Left/Right cycle
+    // the selection, click confirms. Drawn last (foreground).
+    s_gb_menu = lv_label_create(s_scr_gamebook);
+    lv_obj_set_style_text_color(s_gb_menu, lv_color_hex(COL_CODE), 0);
+    lv_obj_set_style_bg_color(s_gb_menu, lv_color_hex(0x182230), 0);
+    lv_obj_set_style_bg_opa(s_gb_menu, LV_OPA_COVER, 0);
+    lv_obj_set_style_pad_all(s_gb_menu, 5, 0);
+    lv_obj_set_style_text_font(s_gb_menu, &lv_font_montserrat_14, 0);
+    lv_label_set_long_mode(s_gb_menu, LV_LABEL_LONG_DOT);
+    lv_obj_set_width(s_gb_menu, DUI_HOR_RES);
+    lv_obj_set_style_text_align(s_gb_menu, LV_TEXT_ALIGN_CENTER, 0);
+    lv_label_set_text(s_gb_menu, "");
+    lv_obj_align(s_gb_menu, LV_ALIGN_BOTTOM_MID, 0, 0);
+
+    // Reading area: a vertically-scrollable container filling the whole height
+    // between the title and the choice line. Up/Down scroll it by half-pages.
+    s_gb_body_cont = lv_obj_create(s_scr_gamebook);
+    lv_obj_set_style_bg_color(s_gb_body_cont, lv_color_hex(0x000000), 0);
+    lv_obj_set_style_bg_opa(s_gb_body_cont, LV_OPA_COVER, 0);
+    lv_obj_set_style_border_width(s_gb_body_cont, 0, 0);
+    lv_obj_set_style_pad_all(s_gb_body_cont, 6, 0);
+    lv_obj_set_size(s_gb_body_cont, DUI_HOR_RES, 264);   // 24 (title) .. 288 (menu)
+    lv_obj_set_pos(s_gb_body_cont, 0, 24);
+    lv_obj_set_scroll_dir(s_gb_body_cont, LV_DIR_VER);
+    lv_obj_set_scrollbar_mode(s_gb_body_cont, LV_SCROLLBAR_MODE_AUTO);
+
+    s_gb_body = lv_label_create(s_gb_body_cont);
+    lv_obj_set_style_text_color(s_gb_body, lv_color_hex(COL_VALUE), 0);
+    lv_obj_set_style_text_font(s_gb_body, &lv_font_montserrat_14, 0);
+    lv_label_set_long_mode(s_gb_body, LV_LABEL_LONG_WRAP);
+    lv_obj_set_width(s_gb_body, DUI_HOR_RES - 24);   // container width minus padding
+    lv_label_set_text(s_gb_body, "");
+    lv_obj_align(s_gb_body, LV_ALIGN_TOP_LEFT, 0, 0);
+}
+
 static void build_status_screen(void) {
     lv_obj_t *scr = s_scr_status;
     lv_obj_set_style_bg_color(scr, lv_color_hex(COL_BG), 0);
@@ -853,10 +964,49 @@ static void apply_status(const display_status_t *s) {
     // Active step → scene view; idle → status view. The 5-way buttons can
     // override (1=force status, 2=force scene; 0=auto). Fade 240 ms, the
     // original ui_manager default transition (SceneTransition::kFade, 240).
+    // Gamebook page: refresh its labels from the latest show() buffers, then
+    // apply any pending manual scroll (Up/Down) on the reading container.
+    if (s_gamebook_open) {
+        lv_label_set_text(s_gb_title, s_gb_title_buf);
+        lv_label_set_text(s_gb_body,  s_gb_body_buf);
+        lv_label_set_text(s_gb_menu,  s_gb_menu_buf);
+        if (s_gb_scroll_home) {
+            lv_obj_scroll_to_y(s_gb_body_cont, 0, LV_ANIM_OFF);
+            s_gb_scroll_home = false;
+        }
+        int req = s_gb_scroll_req;
+        if (req != 0) {
+            s_gb_scroll_req = 0;
+            // +1 page = read further down (content moves up): negative dy.
+            lv_obj_scroll_by(s_gb_body_cont, 0, -req * 130, LV_ANIM_ON);
+        }
+    }
+    // Library grid: refresh tile titles + highlight the selected one.
+    if (s_library_open) {
+        for (int i = 0; i < LIB_TILES; i++) {
+            if (i < s_lib_count_buf) {
+                lv_label_set_text(s_lib_label[i], s_lib_title_buf[i]);
+                lv_obj_clear_flag(s_lib_tile[i], LV_OBJ_FLAG_HIDDEN);
+            } else {
+                lv_obj_add_flag(s_lib_tile[i], LV_OBJ_FLAG_HIDDEN);
+            }
+            bool on = (i == s_lib_sel_buf);
+            lv_obj_set_style_border_color(s_lib_tile[i],
+                lv_color_hex(on ? COL_CODE : 0x445566), 0);
+            lv_obj_set_style_border_width(s_lib_tile[i], on ? 4 : 2, 0);
+            lv_obj_set_style_bg_color(s_lib_tile[i],
+                lv_color_hex(on ? 0x223040 : 0x101820), 0);
+        }
+    }
+
     extern volatile uint8_t g_dui_view_override;
     lv_obj_t *want;
     if (!s_intro_done) {
         want = s_scr_intro;            // boot intro plays out first
+    } else if (s_library_open) {
+        want = s_scr_library;          // story picker owns the screen
+    } else if (s_gamebook_open) {
+        want = s_scr_gamebook;         // gamebook owns the screen while running
     } else if (s_browser_open) {
         want = s_scr_browser;          // file browser on top of everything
     } else if (s_shell_open) {
@@ -964,6 +1114,8 @@ static void display_task(void *arg) {
     build_status_screen();
     build_scene_screen();
     build_shell_screen();
+    build_gamebook_screen();
+    build_library_screen();
     build_browser_screen();
     build_intro_screen();
 
@@ -1145,9 +1297,67 @@ extern "C" void display_ui_set_status(const display_status_t *s) {
     }
 }
 
+static display_ui_key_hook_t s_key_hook = nullptr;
+
+extern "C" void display_ui_set_key_hook(display_ui_key_hook_t hook) {
+    s_key_hook = hook;
+}
+
+extern "C" void display_ui_gamebook_show(const char *title, const char *body,
+                                         const char *menu, bool reset_scroll) {
+    if (s_mutex) xSemaphoreTake(s_mutex, portMAX_DELAY);
+    snprintf(s_gb_title_buf, sizeof(s_gb_title_buf), "%s", title ? title : "");
+    snprintf(s_gb_body_buf,  sizeof(s_gb_body_buf),  "%s", body  ? body  : "");
+    snprintf(s_gb_menu_buf,  sizeof(s_gb_menu_buf),  "%s", menu  ? menu  : "");
+    if (reset_scroll) s_gb_scroll_home = true;   // new passage → back to top
+    s_gamebook_open = true;
+    s_dirty = true;
+    if (s_mutex) xSemaphoreGive(s_mutex);
+}
+
+extern "C" void display_ui_gamebook_scroll(int dir) {
+    // dir > 0 : read further down ; dir < 0 : back up. Accumulated and applied
+    // on the display task (this runs on the buttons task).
+    s_gb_scroll_req += (dir > 0) ? 1 : -1;
+    s_dirty = true;
+}
+
+extern "C" void display_ui_gamebook_hide(void) {
+    s_gamebook_open = false;
+    s_gb_scroll_req = 0;
+    s_dirty = true;
+}
+
+extern "C" void display_ui_library_show(const char *const *titles, int count,
+                                        int sel) {
+    if (count > LIB_TILES) count = LIB_TILES;
+    if (count < 0) count = 0;
+    if (s_mutex) xSemaphoreTake(s_mutex, portMAX_DELAY);
+    s_lib_count_buf = count;
+    s_lib_sel_buf   = (count > 0) ? ((sel % count + count) % count) : 0;
+    for (int i = 0; i < LIB_TILES; i++) {
+        snprintf(s_lib_title_buf[i], sizeof(s_lib_title_buf[i]), "%s",
+                 (i < count && titles && titles[i]) ? titles[i] : "");
+    }
+    s_library_open  = true;
+    s_gamebook_open = false;   // library and a running story are exclusive
+    s_dirty = true;
+    if (s_mutex) xSemaphoreGive(s_mutex);
+}
+
+extern "C" void display_ui_library_hide(void) {
+    s_library_open = false;
+    s_dirty = true;
+}
+
 extern "C" void display_ui_handle_key(uint8_t key) {
     static uint8_t s_brightness = 100;
 
+    // Takeover mode (e.g. gamebook): if the hook consumes the key, stop here.
+    if (s_key_hook && s_key_hook(key)) {
+        return;
+    }
+
     // Any key skips the boot intro.
     if (!s_intro_done) {
         s_intro_done = true;

idf_zacus/components/display_ui/include/display_ui.h

@@ -78,6 +78,59 @@ void display_ui_camera_frame(const uint8_t *gray, int width, int height);
  */
 void display_ui_handle_key(uint8_t key);
 
+/**
+ * @brief Install an optional key interceptor.
+ *
+ * If a hook is set and returns true for a given key, the key is consumed and
+ * the normal shell/scene handling is skipped. Lets a takeover mode (e.g. the
+ * gamebook) own the 5-way pad without display_ui having to depend on it.
+ * Pass NULL to remove the hook. Thread-safe (single pointer write).
+ */
+typedef bool (*display_ui_key_hook_t)(uint8_t key);
+void display_ui_set_key_hook(display_ui_key_hook_t hook);
+
+/**
+ * @brief Show a full-screen gamebook page (takes over the display).
+ *
+ * Dedicated "livre dont vous êtes le héros" view: a centred title, the full
+ * passage text wrapped over multiple lines, and a choice menu at the bottom.
+ * Forces this view until display_ui_gamebook_hide(). Thread-safe (buffers
+ * copied under the mutex; the actual LVGL render runs on the display task).
+ * Strings should be ASCII (the embedded fonts have no accents).
+ *
+ * @param title  short page title (top)
+ * @param body   full passage text (wrapped); may be long
+ * @param menu   choice lines (bottom), e.g. "[OK] ...\n[<>] ..."
+ */
+void display_ui_gamebook_show(const char *title, const char *body,
+                              const char *menu, bool reset_scroll);
+
+/**
+ * @brief Scroll the gamebook reading area (Up/Down buttons).
+ * @param dir  >0 = read further down, <0 = back up. Half-page per call.
+ */
+void display_ui_gamebook_scroll(int dir);
+
+/** @brief Leave the gamebook view and return to the normal scene/status flow. */
+void display_ui_gamebook_hide(void);
+
+/**
+ * @brief Show the gamebook library as a grid of up to 6 tiles.
+ *
+ * Each tile shows a story title; the tile at index `sel` is highlighted. The
+ * gamebook owns the pad and calls this on every cursor move. Forces the
+ * library view until a story is loaded or display_ui_library_hide(). Titles
+ * should be ASCII.
+ *
+ * @param titles  array of `count` story titles
+ * @param count   number of stories (clamped to 6)
+ * @param sel     highlighted tile index
+ */
+void display_ui_library_show(const char *const *titles, int count, int sel);
+
+/** @brief Leave the library view. */
+void display_ui_library_hide(void);
+
 /**
  * @brief Pop the pending shell-app launch request, if any.
  *

idf_zacus/components/game_endpoint/CMakeLists.txt

@@ -17,6 +17,7 @@ idf_component_register(
         puzzle_state
         media_manager
         sd_storage
+        gamebook
     PRIV_REQUIRES
         local_puzzles
         p7_coffre

idf_zacus/components/game_endpoint/game_endpoint.c

@@ -27,6 +27,7 @@
 #include "nvs_flash.h"
 
 #include "hints_client.h"
+#include "gamebook.h"
 #include "npc_engine.h"
 #include "scenario_mesh.h"
 #include "puzzle_binding.h"
@@ -994,6 +995,29 @@ static esp_err_t handle_media_play_post(httpd_req_t *req) {
     return send_error(req, "500 Internal Server Error", esp_err_to_name(err));
 }
 
+// ─── POST /game/gamebook[?action=stop] ───────────────────────────────────────
+//
+// Start the "livre dont vous êtes le héros" mode (loads /sdcard/gamebook/
+// gamebook.json, plays the start passage, takes over the 5-way pad). With
+// ?action=stop it leaves gamebook mode. No body required.
+static esp_err_t handle_gamebook_post(httpd_req_t *req) {
+    char query[32] = {0}, action[16] = {0};
+    if (httpd_req_get_url_query_str(req, query, sizeof(query)) == ESP_OK) {
+        httpd_query_key_value(query, "action", action, sizeof(action));
+    }
+    if (strcmp(action, "stop") == 0) {
+        gamebook_stop();
+        return send_json(req, "200 OK", "{\"gamebook\":\"stopped\"}");
+    }
+    esp_err_t err = gamebook_start();
+    if (err != ESP_OK) {
+        return send_error(req, "503 Service Unavailable",
+                          err == ESP_ERR_NOT_FOUND ? "gamebook_not_on_sd"
+                                                   : "gamebook_load_failed");
+    }
+    return send_json(req, "200 OK", "{\"gamebook\":\"started\"}");
+}
+
 // ─── GET /game/puzzle_state ──────────────────────────────────────────────────
 //
 // Returns {"step_id":"STEP_X"|null, "solved":[1,3], "code":"125"}.
@@ -1149,6 +1173,43 @@ static esp_err_t handle_file_post(httpd_req_t *req) {
     return send_json(req, "200 OK", resp);
 }
 
+// ─── DELETE /game/file?path=sd/<…>|apps/<…> — remove a staged file ───────────
+// Same path routing/whitelist as the POST handler. Lets the host clean stale
+// assets (e.g. orphan gamebook WAVs) off the SD without reflashing.
+static esp_err_t handle_file_delete(httpd_req_t *req) {
+    char query[160], path_param[96];
+    if (httpd_req_get_url_query_str(req, query, sizeof(query)) != ESP_OK ||
+        httpd_query_key_value(query, "path", path_param,
+                              sizeof(path_param)) != ESP_OK) {
+        return send_error(req, "400 Bad Request", "missing path param");
+    }
+    const bool to_sd   = (strncmp(path_param, "sd/", 3) == 0);
+    const bool to_apps = (strncmp(path_param, "apps/", 5) == 0);
+    if ((!to_sd && !to_apps) || strstr(path_param, "..") ||
+        path_param[strlen(path_param) - 1] == '/') {
+        return send_error(req, "403 Forbidden", "path must be under apps/ or sd/");
+    }
+    char full[192];
+    if (to_sd) {
+        if (!sd_storage_ready()) {
+            return send_error(req, "503 Service Unavailable", "sd_not_mounted");
+        }
+        snprintf(full, sizeof(full), "/sdcard/%s", path_param + 3);
+    } else {
+        if (mount_storage_lazy() != ESP_OK) {
+            return send_error(req, "503 Service Unavailable", "storage_unavailable");
+        }
+        snprintf(full, sizeof(full), "/littlefs/%s", path_param);
+    }
+    if (unlink(full) != 0) {
+        return send_error(req, "404 Not Found", "remove failed");
+    }
+    ESP_LOGI(TAG, "file removed: %s", full);
+    char resp[192];
+    snprintf(resp, sizeof(resp), "{\"status\":\"ok\",\"removed\":\"%s\"}", path_param);
+    return send_json(req, "200 OK", resp);
+}
+
 void game_endpoint_get_scene(scene_binding_t *out) {
     if (!out) return;
     // Lock-free snapshot, same class as get_puzzle_status: written on the
@@ -1220,6 +1281,12 @@ esp_err_t game_endpoint_init(httpd_handle_t server) {
         .handler  = handle_file_post,
         .user_ctx = NULL,
     };
+    static const httpd_uri_t uri_file_delete = {
+        .uri      = "/game/file",
+        .method   = HTTP_DELETE,
+        .handler  = handle_file_delete,
+        .user_ctx = NULL,
+    };
     static const httpd_uri_t uri_espnow_cmd_post = {
         .uri      = "/game/espnow/cmd",
         .method   = HTTP_POST,
@@ -1232,6 +1299,12 @@ esp_err_t game_endpoint_init(httpd_handle_t server) {
         .handler  = handle_media_play_post,
         .user_ctx = NULL,
     };
+    static const httpd_uri_t uri_gamebook_post = {
+        .uri      = "/game/gamebook",
+        .method   = HTTP_POST,
+        .handler  = handle_gamebook_post,
+        .user_ctx = NULL,
+    };
 
     // Bring up the ESP-NOW mesh transport. The master is primarily a sender
     // (the relay handler) but we also register the apply adapter so a peer
@@ -1296,6 +1369,10 @@ esp_err_t game_endpoint_init(httpd_handle_t server) {
     if (err != ESP_OK) {
         ESP_LOGW(TAG, "register POST /game/step: %s", esp_err_to_name(err));
     }
+    err = httpd_register_uri_handler(server, &uri_file_delete);
+    if (err != ESP_OK) {
+        ESP_LOGW(TAG, "register DELETE /game/file: %s", esp_err_to_name(err));
+    }
     err = httpd_register_uri_handler(server, &uri_file_post);
     if (err != ESP_OK) {
         ESP_LOGW(TAG, "register /game/file: %s", esp_err_to_name(err));
@@ -1308,6 +1385,10 @@ esp_err_t game_endpoint_init(httpd_handle_t server) {
     if (err != ESP_OK) {
         ESP_LOGW(TAG, "register POST /game/media/play: %s", esp_err_to_name(err));
     }
+    err = httpd_register_uri_handler(server, &uri_gamebook_post);
+    if (err != ESP_OK) {
+        ESP_LOGW(TAG, "register POST /game/gamebook: %s", esp_err_to_name(err));
+    }
 
     ESP_LOGI(TAG, "game endpoint registered "
                   "(GET+POST /game/group_profile, POST /game/scenario%s, "

idf_zacus/components/gamebook/CMakeLists.txt

@@ -0,0 +1,11 @@
+idf_component_register(
+    SRCS
+        "gamebook.c"
+    INCLUDE_DIRS
+        "include"
+    REQUIRES
+        json
+        display_ui
+        media_manager
+        log
+)

idf_zacus/components/gamebook/gamebook.c

@@ -0,0 +1,306 @@
+// gamebook.c — see gamebook.h. Standalone gamebook player + library for the
+// Freenove master. On boot it shows the library (a grid of story tiles);
+// picking one loads and plays that book; finishing returns to the library.
+#include "gamebook.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cJSON.h"
+#include "esp_log.h"
+#include "esp_heap_caps.h"
+
+#include "display_ui.h"
+#include "media_manager.h"
+
+static const char *TAG = "gamebook";
+
+#define GAMEBOOK_DIR   "/sdcard/gamebook"
+#define LIBRARY_JSON   GAMEBOOK_DIR "/library.json"
+#define JSON_MAX       (256 * 1024)  /* expanded books are ~80 KB of JSON */
+#define LIB_MAX        6             /* matches the display tile grid */
+
+typedef enum { GB_OFF, GB_LIBRARY, GB_STORY } gb_mode_t;
+
+// Library state
+static cJSON   *s_lib_root  = NULL;  /* owns library.json while loaded   */
+static cJSON   *s_lib       = NULL;  /* borrowed: root->"library" array  */
+static int      s_lib_n     = 0;
+static int      s_lib_sel   = 0;
+
+// Story state
+static cJSON   *s_book      = NULL;  /* owns the current <book>.json      */
+static cJSON   *s_passages  = NULL;  /* borrowed: book->"passages"        */
+static char     s_title[48] = {0};
+static char     s_current[48] = {0};
+static int      s_sel       = 0;     /* highlighted choice index          */
+
+static volatile gb_mode_t s_mode = GB_OFF;
+
+bool gamebook_active(void) { return s_mode != GB_OFF; }
+
+/* PSRAM allocators for cJSON — book trees are large (see gamebook_init). */
+static void *gb_malloc(size_t sz) { return heap_caps_malloc(sz, MALLOC_CAP_SPIRAM); }
+static void  gb_free(void *p)      { heap_caps_free(p); }
+
+/* Read a whole JSON file from the SD into a cJSON tree (caller frees). */
+static cJSON *load_json(const char *path)
+{
+    FILE *f = fopen(path, "rb");
+    if (!f) { ESP_LOGW(TAG, "open %s failed", path); return NULL; }
+    fseek(f, 0, SEEK_END);
+    long sz = ftell(f);
+    rewind(f);
+    if (sz <= 0 || sz > JSON_MAX) { fclose(f); ESP_LOGW(TAG, "%s size %ld", path, sz); return NULL; }
+    char *buf = heap_caps_malloc((size_t)sz + 1, MALLOC_CAP_SPIRAM);
+    if (!buf) { fclose(f); return NULL; }
+    size_t rd = fread(buf, 1, (size_t)sz, f);
+    fclose(f);
+    buf[rd] = '\0';
+    cJSON *root = cJSON_Parse(buf);
+    heap_caps_free(buf);
+    if (!root) ESP_LOGW(TAG, "malformed JSON: %s", path);
+    return root;
+}
+
+// ── Library ──────────────────────────────────────────────────────────────────
+
+static void render_library(void)
+{
+    const char *titles[LIB_MAX] = {0};
+    int n = (s_lib_n < LIB_MAX) ? s_lib_n : LIB_MAX;
+    for (int i = 0; i < n; i++) {
+        const cJSON *t = cJSON_GetObjectItem(cJSON_GetArrayItem(s_lib, i), "title");
+        titles[i] = cJSON_IsString(t) ? t->valuestring : "?";
+    }
+    display_ui_library_show(titles, n, s_lib_sel);
+}
+
+static void free_story(void)
+{
+    media_manager_stop();
+    if (s_book) { cJSON_Delete(s_book); s_book = NULL; }
+    s_passages = NULL;
+    s_current[0] = '\0';
+}
+
+static esp_err_t open_library(void)
+{
+    free_story();
+    if (s_lib_root) { cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL; }
+
+    s_lib_root = load_json(LIBRARY_JSON);
+    if (!s_lib_root) return ESP_ERR_NOT_FOUND;
+    s_lib = cJSON_GetObjectItem(s_lib_root, "library");
+    if (!cJSON_IsArray(s_lib) || cJSON_GetArraySize(s_lib) == 0) {
+        cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL;
+        ESP_LOGW(TAG, "library.json has no stories");
+        return ESP_ERR_INVALID_ARG;
+    }
+    s_lib_n = cJSON_GetArraySize(s_lib);
+    s_lib_sel = 0;
+    s_mode = GB_LIBRARY;
+    display_ui_gamebook_hide();
+    render_library();
+    ESP_LOGI(TAG, "library open (%d stories)", s_lib_n);
+    return ESP_OK;
+}
+
+// ── Story ─────────────────────────────────────────────────────────────────────
+
+static const cJSON *cur_passage(void) { return cJSON_GetObjectItem(s_passages, s_current); }
+
+static int cur_choice_count(void)
+{
+    const cJSON *ch = cJSON_GetObjectItem(cur_passage(), "choices");
+    return cJSON_IsArray(ch) ? cJSON_GetArraySize(ch) : 0;
+}
+
+/* (Re)draw the current page. `home` true = new passage (reset scroll to top);
+ * false = same passage, only the choice cursor moved (keep scroll position).
+ * The bottom line shows ONE choice with < > arrows (Left/Right cycles). */
+static void render_page(bool home)
+{
+    const cJSON *p = cur_passage();
+    if (!cJSON_IsObject(p)) return;
+    const cJSON *screen  = cJSON_GetObjectItem(p, "screen");
+    const cJSON *text    = cJSON_GetObjectItem(p, "text");
+    const cJSON *choices = cJSON_GetObjectItem(p, "choices");
+    int n = cJSON_IsArray(choices) ? cJSON_GetArraySize(choices) : 0;
+
+    char menu[160];
+    if (n == 0) {
+        snprintf(menu, sizeof(menu), "~ Fin ~   (clic = bibliotheque)");
+    } else {
+        const cJSON *lbl = cJSON_GetObjectItem(cJSON_GetArrayItem(choices, s_sel),
+                                               "label");
+        const char *txt = cJSON_IsString(lbl) ? lbl->valuestring : "?";
+        if (n > 1) {
+            /* Down cycles the answer, Click validates. */
+            snprintf(menu, sizeof(menu), "%d/%d  %s   (bas / clic)",
+                     s_sel + 1, n, txt);
+        } else {
+            snprintf(menu, sizeof(menu), "%s   (clic)", txt);
+        }
+    }
+    display_ui_gamebook_show(
+        cJSON_IsString(screen) ? screen->valuestring : s_title,
+        cJSON_IsString(text)   ? text->valuestring   : "",
+        menu, home);
+}
+
+static void enter_passage(const char *pid)
+{
+    const cJSON *p = cJSON_GetObjectItem(s_passages, pid);
+    if (!cJSON_IsObject(p)) { ESP_LOGW(TAG, "passage '%s' not found", pid); return; }
+    snprintf(s_current, sizeof(s_current), "%s", pid);
+    s_sel = 0;
+    render_page(true);
+
+    const cJSON *wav = cJSON_GetObjectItem(p, "wav");
+    if (cJSON_IsString(wav) && wav->valuestring[0]) {
+        char path[96];
+        snprintf(path, sizeof(path), "%s/%s", GAMEBOOK_DIR, wav->valuestring);
+        media_manager_stop();   /* a choice skips the narration */
+        media_manager_play(path);
+    }
+    ESP_LOGI(TAG, "passage '%s' (%d choices)", pid, cur_choice_count());
+}
+
+/* Load story #idx from the library and play it. */
+static void load_book(int idx)
+{
+    const cJSON *e = cJSON_GetArrayItem(s_lib, idx);
+    const cJSON *file = cJSON_GetObjectItem(e, "book");
+    if (!cJSON_IsString(file)) { ESP_LOGW(TAG, "library[%d] has no book", idx); return; }
+
+    char path[128];
+    snprintf(path, sizeof(path), "%s/%s", GAMEBOOK_DIR, file->valuestring);
+    cJSON *book = load_json(path);
+    if (!book) return;
+    const cJSON *passages = cJSON_GetObjectItem(book, "passages");
+    const cJSON *start = cJSON_GetObjectItem(book, "start");
+    const cJSON *title = cJSON_GetObjectItem(book, "title");
+    if (!cJSON_IsObject(passages) || !cJSON_IsString(start)) {
+        ESP_LOGW(TAG, "%s missing passages/start", path);
+        cJSON_Delete(book);
+        return;
+    }
+    free_story();
+    s_book = book;
+    s_passages = (cJSON *)passages;
+    snprintf(s_title, sizeof(s_title), "%s",
+             cJSON_IsString(title) ? title->valuestring : "");
+    s_mode = GB_STORY;
+    display_ui_library_hide();
+    ESP_LOGI(TAG, "load book \"%s\" @ '%s'", s_title, start->valuestring);
+    enter_passage(start->valuestring);
+}
+
+// ── Input ─────────────────────────────────────────────────────────────────────
+
+/* MEASURED pad mapping on this hardware (ADC ladder, see calibration):
+ *   key1 = CLICK (centre, ~0 mV)
+ *   key2 = LEFT  (gauche, ~700 mV)
+ *   key4 = DOWN  (bas,    ~1350 mV)
+ *   key5 = RIGHT (droite, ~1994 mV)
+ *   key3 is never produced; the physical UP button is electrically dead
+ *   (held = no voltage change), so nothing can depend on it. */
+#define PAD_CLICK 1
+#define PAD_LEFT  2
+#define PAD_DOWN  4
+#define PAD_RIGHT 5
+
+/* Library nav: Down/Right → next tile, Left → previous, Click → open.
+ * Selection wraps, so the working buttons reach every story without Up. */
+static bool library_key(uint8_t key)
+{
+    if (s_lib_n <= 0) return true;
+    switch (key) {
+    case PAD_DOWN: case PAD_RIGHT:
+        s_lib_sel = (s_lib_sel + 1) % s_lib_n; render_library(); break;
+    case PAD_LEFT:
+        s_lib_sel = (s_lib_sel - 1 + s_lib_n) % s_lib_n; render_library(); break;
+    case PAD_CLICK:
+        load_book(s_lib_sel); break;
+    default: break;
+    }
+    return true;
+}
+
+/* Story nav (Up is dead, so it's never used):
+ *   Left  → scroll the reading text UP
+ *   Right → scroll the reading text DOWN
+ *   Down  → next answer (cycles through all choices, wraps around)
+ *   Click → validate the highlighted answer
+ * On an ending page (no choices): Left/Right still scroll, Click → library. */
+static bool story_key(uint8_t key)
+{
+    if (key == PAD_LEFT)  { display_ui_gamebook_scroll(-1); return true; }  /* scroll up   */
+    if (key == PAD_RIGHT) { display_ui_gamebook_scroll(+1); return true; }  /* scroll down */
+
+    int n = cur_choice_count();
+    if (n == 0) {                       /* ending → click returns to library */
+        if (key == PAD_CLICK) open_library();
+        return true;
+    }
+    switch (key) {
+    case PAD_DOWN: s_sel = (s_sel + 1) % n; render_page(false); break;  /* next answer */
+    case PAD_CLICK: {                                                   /* validate */
+        const cJSON *choices = cJSON_GetObjectItem(cur_passage(), "choices");
+        const cJSON *g = cJSON_GetObjectItem(cJSON_GetArrayItem(choices, s_sel), "goto");
+        if (cJSON_IsString(g)) {
+            ESP_LOGI(TAG, "validate #%d -> '%s'", s_sel, g->valuestring);
+            enter_passage(g->valuestring);
+        }
+        break;
+    }
+    default: break;
+    }
+    return true;
+}
+
+static bool gamebook_key_hook(uint8_t key)
+{
+    switch (s_mode) {
+    case GB_LIBRARY: return library_key(key);
+    case GB_STORY:   return story_key(key);
+    default:         return false;   /* not active → let the shell have it */
+    }
+}
+
+// ── Public API ────────────────────────────────────────────────────────────────
+
+esp_err_t gamebook_start(void)
+{
+    return open_library();
+}
+
+void gamebook_stop(void)
+{
+    if (s_mode == GB_OFF) return;
+    s_mode = GB_OFF;
+    free_story();
+    if (s_lib_root) { cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL; }
+    display_ui_gamebook_hide();
+    display_ui_library_hide();
+    ESP_LOGI(TAG, "stopped");
+}
+
+void gamebook_init(void)
+{
+    /* Keep the large book trees in PSRAM — an expanded book is ~80 KB of JSON,
+     * whose parsed node tree would exhaust the internal heap on this firmware. */
+    static cJSON_Hooks hooks = {
+        .malloc_fn = gb_malloc,
+        .free_fn   = gb_free,
+    };
+    cJSON_InitHooks(&hooks);
+
+    /* Only register the pad hook here — the SD and media_manager aren't up yet
+     * at this point in boot. main.c calls gamebook_start() once they are, to
+     * boot into the library. */
+    display_ui_set_key_hook(gamebook_key_hook);
+    ESP_LOGI(TAG, "key hook installed");
+}

idf_zacus/components/gamebook/include/gamebook.h

@@ -0,0 +1,42 @@
+#pragma once
+// gamebook — "livre dont vous êtes le héros" mode for the Freenove master.
+//
+// Reads /sdcard/gamebook/gamebook.json (built by tools/gamebook/build_gamebook.py),
+// plays each passage's WAV narration from the SD via media_manager, shows the
+// passage title + choice menu on the display, and navigates with the 5-way pad
+// (it installs a display_ui key hook so it owns the buttons while active).
+// Fully local: no model, no gateway.
+//
+// JSON shape:
+//   { "title": "...", "start": "intro",
+//     "passages": { "intro": { "wav": "intro.wav", "screen": "...",
+//                              "menu": "[OK] ... | [<>] ...",
+//                              "choices": [ {"key": 1, "goto": "machine"}, ... ] },
+//                   ... } }
+// key codes match the 5-way pad: 1=SELECT 2=DOWN 3=MENU 4=LEFT/RIGHT 5=UP.
+// MENU (3) always quits the gamebook.
+
+#include "esp_err.h"
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Install the display_ui key hook. Call once at boot, after display_ui_init().
+void gamebook_init(void);
+
+// Load /sdcard/gamebook/gamebook.json and enter the start passage (show text +
+// play its WAV). Returns ESP_ERR_* if the SD/JSON is missing or malformed.
+esp_err_t gamebook_start(void);
+
+// Leave gamebook mode: stop playback, release the JSON, hand the pad back to
+// the shell. Idempotent.
+void gamebook_stop(void);
+
+// True while a gamebook is running (used by the key hook to claim the pad).
+bool gamebook_active(void);
+
+#ifdef __cplusplus
+}
+#endif

idf_zacus/components/ota_server/ota_server.c

@@ -310,8 +310,9 @@ esp_err_t ota_server_init(void) {
     // HTTP server config
     httpd_config_t config = HTTPD_DEFAULT_CONFIG();
     config.server_port     = OTA_SERVER_PORT;
-    config.max_uri_handlers = 20;   // ota + voice_hook + game (incl. /game/step,
-                                    // /game/puzzle_state, /game/file, relay)
+    config.max_uri_handlers = 24;   // ota + voice_hook + game (incl. /game/step,
+                                    // /game/puzzle_state, /game/file POST+DELETE,
+                                    // relay, /game/gamebook)
                                     // + headroom
     config.uri_match_fn    = httpd_uri_match_wildcard;
     config.stack_size      = 8192;

idf_zacus/main/CMakeLists.txt

@@ -23,6 +23,7 @@ idf_component_register(
         esp_event
         espressif__mdns
         display_ui
+        gamebook
         puzzle_state
         p7_coffre
         p5_morse

idf_zacus/main/main.c

@@ -55,6 +55,7 @@
 #include "mic_broker.h"
 #include "board_pins_mediakit.h"
 #include "display_ui.h"
+#include "gamebook.h"
 #include "p7_coffre.h"
 #include "p5_morse.h"
 #include "p6_nfc.h"
@@ -436,6 +437,8 @@ void app_main(void) {
         if (btn_err != ESP_OK) {
             ESP_LOGW(TAG, "buttons_input_init: %s", esp_err_to_name(btn_err));
         }
+        // Gamebook mode owns the 5-way pad when started (POST /game/gamebook).
+        gamebook_init();
     }
 
     bool sta_ok = wifi_bring_up();
@@ -520,6 +523,13 @@ void app_main(void) {
             ESP_LOGI(TAG, "media smoke play -> %s",
                      esp_err_to_name(play_err));
 
+            // Boot into the gamebook library (the 6-story tile picker) when the
+            // SD pack is present. Best-effort: no /sdcard/gamebook/library.json
+            // -> the normal shell stays in charge.
+            if (gamebook_start() == ESP_OK) {
+                ESP_LOGI(TAG, "gamebook library up (boot picker)");
+            }
+
             // Slice 4: bring up the ported npc_engine. Cue table is empty
             // at this stage — wiring the scenario IR-driven cue catalog is
             // a follow-up slice. The engine still boots, accepts ticks

plip_voice/main/CMakeLists.txt

@@ -13,6 +13,7 @@ idf_component_register(
         "dtmf.c"
         "turn_client.c"
         "slic.c"
+        "plip_gamebook.c"
     INCLUDE_DIRS "."
     PRIV_REQUIRES
         driver

plip_voice/main/Kconfig.projbuild

@@ -84,6 +84,16 @@ menu "PLIP Voice Configuration"
             Can be combined with PLIP_DIAL_PULSE: whichever source detects a
             digit first wins.  Default off — enable for touch-tone handsets.
 
+    config PLIP_AUTO_RING
+        bool "Auto story-ring (rings by itself every 15-30 min)"
+        default n
+        help
+            When enabled, the phone rings on its own at a random 15-30 minute
+            interval; picking up launches a random audio story straight away
+            (no menu). If nobody answers within 1 minute the bell stops and the
+            next ring is rescheduled. Default off — enable for the escape-room
+            ambience where the phone calls the players.
+
     config PLIP_GATEWAY_URL
         string "NPC Gateway Base URL"
         default "http://192.168.0.50:8401"

plip_voice/main/conversation.c

@@ -23,6 +23,7 @@
 #include "phone.h"
 #include "slic.h"
 #include "turn_client.h"
+#include "plip_gamebook.h"
 #if CONFIG_PLIP_DIAL_DTMF
 #include "dtmf.h"
 #endif
@@ -32,6 +33,7 @@
 #include "esp_log.h"
 #include "esp_timer.h"
 #include "esp_heap_caps.h"
+#include "esp_random.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -68,6 +70,7 @@ typedef enum {
     STATE_BUSY,
     STATE_GREET,       /* fetching + playing NPC greeting (Stage 2) */
     STATE_CONNECTED,   /* in-call — Stage 3 will add listen loop     */
+    STATE_GAMEBOOK,    /* audio "livre dont vous êtes le héros"      */
 } conv_state_t;
 
 static volatile conv_state_t s_state    = STATE_IDLE;
@@ -84,14 +87,27 @@ static char s_sid[32] = {0};
  * NOT re-read dialer_current() for the greeting/reply — that polluted number
  * would 404 at the gateway. Capture the clean routed number here once. */
 static char s_number[16] = {0};
+/* Scene this call hints on (e.g. "SCENE_WARNING"), locked at pickup like the
+ * number. Empty for player-dialled calls. Drives the local SD hint clip. */
+static char s_scene[40] = {0};
 
 /* Incoming-call mode: an NPC "calls" the phone. conversation_arm_incoming()
- * stores the caller's persona number and rings; when the handset is then picked
- * up from IDLE, we skip the outgoing dialtone/dial/ringback and go straight to
- * GREET with this number (the NPC speaks first). */
+ * stores the caller's persona number (and optional scene) and rings; when the
+ * handset is then picked up from IDLE, we skip the outgoing dialtone/dial/
+ * ringback and go straight to GREET with this number (the NPC speaks first). */
 static char s_incoming_number[16] = {0};
+static char s_incoming_scene[40] = {0};
 static volatile bool s_incoming_armed = false;
 
+/* Auto story-ring: the phone rings on its own at a random interval; picking up
+ * launches a random audio story straight away. If nobody answers, the bell
+ * stops after STORY_RING_TIMEOUT_MS and the next ring is rescheduled. */
+#define STORY_RING_MIN_MS      (15 * 60 * 1000)   /* 15 min */
+#define STORY_RING_SPAN_MS     (15 * 60 * 1000)   /* + up to 15 min → 30 max */
+#define STORY_RING_TIMEOUT_MS  (60 * 1000)        /* give up after 1 min */
+static volatile bool s_story_ring_armed = false;
+static int64_t       s_story_ring_start_us = 0;
+
 /* Known numbers: ringback when dialed */
 static const char *KNOWN[] = {
     "12", "3615", "15", "17", "18", "0142738200", NULL
@@ -105,15 +121,37 @@ static bool is_known(const char *num)
     return false;
 }
 
+/* "SCENE_WARNING" → "warning": strip the SCENE_ prefix and lowercase, matching
+ * the SD pack filenames from tools/tts/generate_plip_sd_pack.py. */
+static void scene_slug(const char *scene, char *out, size_t cap)
+{
+    const char *p = scene;
+    if (strncmp(p, "SCENE_", 6) == 0) p += 6;
+    size_t i = 0;
+    for (; p[i] && i + 1 < cap; i++) {
+        char c = p[i];
+        out[i] = (c >= 'A' && c <= 'Z') ? (char)(c - 'A' + 'a') : c;
+    }
+    out[i] = '\0';
+}
+
 static void go_idle(void)
 {
+    if (s_story_ring_armed) {   /* hung up mid auto-ring → silence the bell */
+        phone_ring_stop();
+        slic_ring_stop();
+        s_story_ring_armed = false;
+    }
     tones_stop();
     audio_stop();
     audio_pa_set(false);
     dialer_reset();
+    plip_gamebook_end();   /* no-op if the gamebook wasn't running */
 #if CONFIG_PLIP_DIAL_DTMF
     dtmf_stop();
 #endif
+    s_scene[0] = '\0';   /* clear scripted-call scene so a later dial-out call
+                          * doesn't inherit it (CONNECTED would skip listening). */
     s_state = STATE_IDLE;
     ESP_LOGI(TAG, "-> IDLE");
 }
@@ -134,12 +172,60 @@ static void enter_incoming_greet(void)
     dialer_reset();
     s_offhook = true;
     snprintf(s_number, sizeof(s_number), "%s", s_incoming_number);
+    snprintf(s_scene, sizeof(s_scene), "%s", s_incoming_scene);
     snprintf(s_sid, sizeof(s_sid), "%lld", (long long)esp_timer_get_time());
     audio_pa_set(true);
     s_state = STATE_GREET;
     ESP_LOGI(TAG, "INCOMING pickup -> GREET num=%s sid=%s", s_number, s_sid);
 }
 
+/* Answered an auto story-ring: stop the bell and launch a random story right
+ * into STATE_GAMEBOOK (no menu). Drives s_offhook directly because the
+ * debounced GPIO hook detection is unreliable while the bell rings. */
+static void enter_story_from_ring(void)
+{
+    s_story_ring_armed = false;
+    phone_ring_stop();
+    slic_ring_stop();
+    tones_stop();
+    dialer_reset();
+    s_offhook = true;
+#if CONFIG_PLIP_DIAL_DTMF
+    dtmf_start();
+#endif
+    audio_pa_set(true);
+    plip_gamebook_begin_random();
+    s_state = STATE_GAMEBOOK;
+    ESP_LOGI(TAG, "story-ring pickup -> GAMEBOOK (random story)");
+}
+
+#if CONFIG_PLIP_AUTO_RING
+/* Rings the phone at a random 15–30 min interval. Only rings when the line is
+ * truly idle (on-hook, no other call/ring armed) and a story pack is present.
+ * The 1-minute no-answer timeout is handled in conv_task. */
+static void story_ring_task(void *arg)
+{
+    (void)arg;
+    for (;;) {
+        uint32_t wait_ms = STORY_RING_MIN_MS + (esp_random() % STORY_RING_SPAN_MS);
+        ESP_LOGI(TAG, "auto story-ring: next attempt in %u min",
+                 (unsigned)(wait_ms / 60000));
+        vTaskDelay(pdMS_TO_TICKS(wait_ms));
+
+        if (s_state == STATE_IDLE && !s_offhook && !s_incoming_armed
+            && !s_story_ring_armed && plip_gamebook_available()) {
+            s_story_ring_armed = true;
+            s_story_ring_start_us = esp_timer_get_time();
+            phone_ring_start();
+            ESP_LOGI(TAG, "auto story-ring: ringing (up to %d s)",
+                     STORY_RING_TIMEOUT_MS / 1000);
+        } else {
+            ESP_LOGI(TAG, "auto story-ring: line busy/unavailable — skipped");
+        }
+    }
+}
+#endif /* CONFIG_PLIP_AUTO_RING */
+
 static void conv_task(void *arg)
 {
     (void)arg;
@@ -161,9 +247,23 @@ static void conv_task(void *arg)
             } else {
                 /* Off-hook from idle */
                 if (s_state == STATE_IDLE) {
-                    if (s_incoming_armed) {
+                    if (s_story_ring_armed) {
+                        /* Answered an auto story-ring → straight into a story. */
+                        enter_story_from_ring();
+                    } else if (s_incoming_armed) {
                         /* INCOMING call answered (phone.c detected the edge). */
                         enter_incoming_greet();
+                    } else if (plip_gamebook_available()) {
+                        /* Gamebook phone: a story pack is on the SD → pick up
+                         * launches the audio "livre dont vous êtes le héros".
+                         * Digits dialed choose the story then the answers. */
+                        dialer_reset();
+#if CONFIG_PLIP_DIAL_DTMF
+                        dtmf_start();
+#endif
+                        plip_gamebook_begin();
+                        s_state = STATE_GAMEBOOK;
+                        ESP_LOGI(TAG, "off-hook -> GAMEBOOK");
                     } else {
                         /* Outgoing call: dial tone, wait for digits. */
                         dialer_reset();
@@ -187,6 +287,19 @@ static void conv_task(void *arg)
              * line directly — it reads the pickup cleanly mid-ring. */
             if (s_incoming_armed && slic_is_offhook()) {
                 enter_incoming_greet();
+            } else if (s_story_ring_armed) {
+                /* Same raw-SLIC poll for the auto story-ring, plus the
+                 * no-answer timeout: stop the bell after 1 min unanswered. */
+                if (slic_is_offhook()) {
+                    enter_story_from_ring();
+                } else if ((esp_timer_get_time() - s_story_ring_start_us) / 1000
+                           >= STORY_RING_TIMEOUT_MS) {
+                    phone_ring_stop();
+                    slic_ring_stop();
+                    s_story_ring_armed = false;
+                    ESP_LOGI(TAG, "auto story-ring: no answer after %d s — stop",
+                             STORY_RING_TIMEOUT_MS / 1000);
+                }
             }
             break;
 
@@ -203,6 +316,21 @@ static void conv_task(void *arg)
             }
             break;
 
+        case STATE_GAMEBOOK:
+            if (!s_offhook) {
+                go_idle();
+                break;
+            }
+            /* Each dialed digit drives one choice. Consume a single digit at a
+             * time (take the first, reset) so the player can dial again right
+             * away — even over the narration, which gets interrupted. */
+            if (!dialer_idle()) {
+                int d = dialer_current()[0] - '0';
+                dialer_reset();
+                plip_gamebook_feed_digit(d);
+            }
+            break;
+
         case STATE_DIALING:
             if (!s_offhook) {
                 go_idle();
@@ -277,11 +405,37 @@ static void conv_task(void *arg)
                     ESP_LOGW(TAG, "no SD clip + gateway greeting failed — silent");
                 }
             }
+            /* Scripted offline call: chain this scene's hint from the SD pack
+             * right after the greeting (the audio queue plays them back-to-back).
+             * Fully local — no gateway, no model. */
+            if (s_scene[0] != '\0' && audio_ensure_sd()) {
+                char slug[40], hint[80];
+                scene_slug(s_scene, slug, sizeof(slug));
+                snprintf(hint, sizeof(hint),
+                         "/sdcard/voice/hint_%s_l1_0.wav", slug);
+                FILE *hf = fopen(hint, "rb");
+                if (hf != NULL) {
+                    fclose(hf);
+                    audio_play_async(hint);
+                    ESP_LOGI(TAG, "GREET: chained SD hint %s", hint);
+                } else {
+                    ESP_LOGI(TAG, "GREET: no SD hint for scene %s (%s)",
+                             s_scene, hint);
+                }
+            }
             s_state = STATE_CONNECTED;
             ESP_LOGI(TAG, "-> CONNECTED");
             break;
 
         case STATE_CONNECTED:
+            /* Scripted offline call (greeting + SD hint already queued): there's
+             * no live two-way conversation to run — just let the clips play out
+             * and wait for the player to hang up. Skips the gateway/model listen
+             * loop entirely. The global on-hook check returns us to IDLE. */
+            if (s_scene[0] != '\0') {
+                vTaskDelay(pdMS_TO_TICKS(REPLY_POLL_MS));
+                break;
+            }
 #if CONFIG_PLIP_VOICE_REPLY
             /*
              * Stage 3 — LISTEN loop.
@@ -407,6 +561,10 @@ void conversation_init(void)
     xTaskCreate(conv_task, "conv", 8192, NULL, 4, NULL);
 #else
     xTaskCreate(conv_task, "conv", 6144, NULL, 4, NULL);
+#endif
+#if CONFIG_PLIP_AUTO_RING
+    /* Auto story-ring scheduler: rings every 15–30 min when idle. */
+    xTaskCreate(story_ring_task, "storyring", 3072, NULL, 3, NULL);
 #endif
     ESP_LOGI(TAG, "conversation init");
 }
@@ -417,12 +575,14 @@ void conversation_on_hook_change(bool offhook)
     s_hook_changed = true;
 }
 
-void conversation_arm_incoming(const char *number)
+void conversation_arm_incoming(const char *number, const char *scene)
 {
     snprintf(s_incoming_number, sizeof(s_incoming_number), "%s",
              (number && number[0]) ? number : "17");
+    snprintf(s_incoming_scene, sizeof(s_incoming_scene), "%s",
+             (scene && scene[0]) ? scene : "");
     s_incoming_armed = true;
     phone_ring_start();
-    ESP_LOGI(TAG, "incoming call armed (num=%s) — ringing until pickup",
-             s_incoming_number);
+    ESP_LOGI(TAG, "incoming call armed (num=%s scene=%s) — ringing until pickup",
+             s_incoming_number, s_incoming_scene[0] ? s_incoming_scene : "-");
 }

plip_voice/main/conversation.h

@@ -6,5 +6,8 @@ void conversation_on_hook_change(bool offhook);
 
 /* Arm an INCOMING call from NPC persona `number` and start ringing. When the
  * handset is picked up from idle, the conversation jumps straight to the
- * greeting (persona speaks first) instead of the outgoing dial-tone path. */
-void conversation_arm_incoming(const char *number);
+ * greeting (persona speaks first) instead of the outgoing dial-tone path.
+ * `scene` (optional, e.g. "SCENE_WARNING") makes the phone play that scene's
+ * hint from its local SD pack right after the greeting; pass NULL/"" for a
+ * greeting-only call. */
+void conversation_arm_incoming(const char *number, const char *scene);

plip_voice/main/net.c

@@ -54,8 +54,9 @@
 
 #define SPIFFS_LABEL  "storage"
 #define SPIFFS_BASE   "/spiffs"
-#define MAX_BODY      (512 * 1024)   /* streamed in 2 KB chunks → RAM-safe; raised
-                                        so full-length say() hint WAVs fit on SD */
+#define MAX_BODY      (3 * 1024 * 1024) /* streamed in 2 KB chunks → RAM-safe;
+                                          raised to fit full-length neural-TTS
+                                          (Kyutai) gamebook narration WAVs */
 
 static volatile bool    s_connected  = false;
 static httpd_handle_t   s_httpd      = NULL;
@@ -281,6 +282,44 @@ static esp_err_t handle_file_post(httpd_req_t *req)
     return send_json(req, "200 OK", resp);
 }
 
+/* ── DELETE /game/file?path=...  (remove a staged file; SD or SPIFFS) ─────── */
+/* Same path routing as the POST handler (sd/ prefix → /sdcard, else /spiffs).
+ * Lets the host clean stale clips when regenerating the SD voice pack. */
+static esp_err_t handle_file_delete(httpd_req_t *req)
+{
+    char query[128] = {0}, fpath[128] = {0};
+    httpd_req_get_url_query_str(req, query, sizeof(query));
+    if (httpd_query_key_value(query, "path", fpath, sizeof(fpath)) != ESP_OK)
+        return send_json(req, "400 Bad Request", "{\"error\":\"missing path param\"}");
+
+    const char *base, *rel = fpath;
+    bool to_sd = false;
+    if      (strncmp(fpath, "sd/", 3) == 0)       { rel = fpath + 3; to_sd = true; }
+    else if (strncmp(fpath, "sdcard/", 7) == 0)   { rel = fpath + 7; to_sd = true; }
+    else if (strncmp(fpath, "/sdcard/", 8) == 0)  { rel = fpath + 8; to_sd = true; }
+
+    if (to_sd) {
+        if (!audio_ensure_sd())
+            return send_json(req, "503 Service Unavailable", "{\"error\":\"no sd card\"}");
+        base = PLIP_SD_MOUNT;
+    } else {
+        ensure_spiffs();
+        base = SPIFFS_BASE;
+    }
+    while (*rel == '/') rel++;
+
+    char full[192];
+    snprintf(full, sizeof(full), "%s/%s", base, rel);
+    if (remove(full) != 0) {
+        ESP_LOGW(TAG, "remove %s failed: errno=%d", full, errno);
+        return send_json(req, "404 Not Found", "{\"error\":\"remove failed\"}");
+    }
+    ESP_LOGI(TAG, "file removed: %s", full);
+    char resp[256];
+    snprintf(resp, sizeof(resp), "{\"status\":\"ok\",\"removed\":\"%s\"}", full);
+    return send_json(req, "200 OK", resp);
+}
+
 /* ── POST /voice/capture ──────────────────────────────────────────────────── */
 
 #define CAP_MAX_MS_DEFAULT      5000
@@ -510,10 +549,13 @@ static esp_err_t handle_debug_ring(httpd_req_t *req)
 {
     /* /debug/ring[?number=NN] — arm an INCOMING call from persona NN (default
      * 17) and ring. On pickup the conversation jumps straight to the greeting. */
-    char query[48] = {0}, number[16] = {0};
+    char query[96] = {0}, number[16] = {0}, scene[40] = {0};
     httpd_req_get_url_query_str(req, query, sizeof(query));
     httpd_query_key_value(query, "number", number, sizeof(number));
-    conversation_arm_incoming(number);  /* defaults to "17" if empty; starts ringing */
+    httpd_query_key_value(query, "scene", scene, sizeof(scene));
+    /* scene (optional) lets the phone play that scene's hint from its SD pack
+     * after the greeting — fully offline, no model. */
+    conversation_arm_incoming(number, scene[0] ? scene : NULL);
     char resp[64];
     snprintf(resp, sizeof(resp), "{\"ok\":true,\"ringing\":true,\"incoming\":\"%s\"}",
              number[0] ? number : "17");
@@ -839,7 +881,7 @@ esp_err_t net_init(void)
     /* Start HTTP server. */
     httpd_config_t hcfg = HTTPD_DEFAULT_CONFIG();
     hcfg.server_port      = 80;
-    hcfg.max_uri_handlers = 17;
+    hcfg.max_uri_handlers = 18;
     hcfg.stack_size       = 8192;
 
     esp_err_t ret = httpd_start(&s_httpd, &hcfg);
@@ -860,6 +902,10 @@ esp_err_t net_init(void)
         .uri = "/game/file", .method = HTTP_POST,
         .handler = handle_file_post, .user_ctx = NULL,
     };
+    static const httpd_uri_t uri_file_delete = {
+        .uri = "/game/file", .method = HTTP_DELETE,
+        .handler = handle_file_delete, .user_ctx = NULL,
+    };
     static const httpd_uri_t uri_cmd = {
         .uri = "/game/cmd", .method = HTTP_POST,
         .handler = handle_cmd_post, .user_ctx = NULL,
@@ -915,6 +961,7 @@ esp_err_t net_init(void)
     httpd_register_uri_handler(s_httpd, &uri_status);
     httpd_register_uri_handler(s_httpd, &uri_scenario);
     httpd_register_uri_handler(s_httpd, &uri_file);
+    httpd_register_uri_handler(s_httpd, &uri_file_delete);
     httpd_register_uri_handler(s_httpd, &uri_cmd);
     httpd_register_uri_handler(s_httpd, &uri_capture);
     httpd_register_uri_handler(s_httpd, &uri_debug_regs);

plip_voice/main/plip_gamebook.c

@@ -0,0 +1,190 @@
+// plip_gamebook.c — see plip_gamebook.h. Audio CYOA for the PLIP phone.
+#include "plip_gamebook.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "cJSON.h"
+#include "esp_log.h"
+#include "esp_random.h"
+
+#include "audio.h"
+
+static const char *TAG = "plip_gb";
+
+#define GB_DIR      "/sdcard/gamebook"
+#define GB_LIBRARY  GB_DIR "/library.json"
+#define GB_MENU_WAV GB_DIR "/menu.wav"
+#define GB_JSON_MAX (64 * 1024)
+
+typedef enum { GB_OFF, GB_MENU, GB_STORY } gb_mode_t;
+
+static cJSON   *s_lib_root  = NULL;   // owns library.json
+static cJSON   *s_lib       = NULL;   // borrowed: root->"library"
+static int      s_lib_n     = 0;
+
+static cJSON   *s_book      = NULL;   // owns the current <id>.json
+static cJSON   *s_passages  = NULL;   // borrowed: book->"passages"
+static char     s_current[48] = {0};
+
+static gb_mode_t s_mode = GB_OFF;
+
+bool plip_gamebook_active(void) { return s_mode != GB_OFF; }
+
+static cJSON *load_json(const char *path)
+{
+    FILE *f = fopen(path, "rb");
+    if (!f) { ESP_LOGW(TAG, "open %s failed", path); return NULL; }
+    fseek(f, 0, SEEK_END);
+    long sz = ftell(f);
+    rewind(f);
+    if (sz <= 0 || sz > GB_JSON_MAX) { fclose(f); return NULL; }
+    char *buf = malloc((size_t)sz + 1);
+    if (!buf) { fclose(f); return NULL; }
+    size_t rd = fread(buf, 1, (size_t)sz, f);
+    fclose(f);
+    buf[rd] = '\0';
+    cJSON *root = cJSON_Parse(buf);
+    free(buf);
+    if (!root) ESP_LOGW(TAG, "malformed JSON: %s", path);
+    return root;
+}
+
+static void play_wav(const char *file)   // file = bare name under GB_DIR
+{
+    char path[96];
+    snprintf(path, sizeof(path), "%s/%s", GB_DIR, file);
+    audio_stop();                 // interrupt any current narration
+    audio_play_async(path);
+}
+
+bool plip_gamebook_available(void)
+{
+    if (!audio_ensure_sd()) return false;
+    FILE *f = fopen(GB_LIBRARY, "rb");
+    if (!f) return false;
+    fclose(f);
+    return true;
+}
+
+static void free_story(void)
+{
+    if (s_book) { cJSON_Delete(s_book); s_book = NULL; }
+    s_passages = NULL;
+    s_current[0] = '\0';
+}
+
+static void enter_menu(void)
+{
+    free_story();
+    s_mode = GB_MENU;
+    audio_stop();
+    audio_play_async(GB_MENU_WAV);   // absolute path
+    ESP_LOGI(TAG, "menu (%d stories)", s_lib_n);
+}
+
+// Play a passage by id (its WAV narrates the text + numbered choices).
+static void enter_passage(const char *pid)
+{
+    const cJSON *p = cJSON_GetObjectItem(s_passages, pid);
+    if (!cJSON_IsObject(p)) { ESP_LOGW(TAG, "passage '%s' missing", pid); return; }
+    snprintf(s_current, sizeof(s_current), "%s", pid);
+    const cJSON *wav = cJSON_GetObjectItem(p, "wav");
+    if (cJSON_IsString(wav) && wav->valuestring[0]) play_wav(wav->valuestring);
+    const cJSON *ch = cJSON_GetObjectItem(p, "choices");
+    ESP_LOGI(TAG, "passage '%s' (%d choices)", pid,
+             cJSON_IsArray(ch) ? cJSON_GetArraySize(ch) : 0);
+}
+
+static void load_book(int idx)
+{
+    const cJSON *e = cJSON_GetArrayItem(s_lib, idx);
+    const cJSON *file = cJSON_GetObjectItem(e, "book");
+    if (!cJSON_IsString(file)) return;
+    char path[128];
+    snprintf(path, sizeof(path), "%s/%s", GB_DIR, file->valuestring);
+    cJSON *book = load_json(path);
+    if (!book) return;
+    const cJSON *passages = cJSON_GetObjectItem(book, "passages");
+    const cJSON *start = cJSON_GetObjectItem(book, "start");
+    if (!cJSON_IsObject(passages) || !cJSON_IsString(start)) {
+        cJSON_Delete(book); return;
+    }
+    free_story();
+    s_book = book;
+    s_passages = (cJSON *)passages;
+    s_mode = GB_STORY;
+    ESP_LOGI(TAG, "load book #%d @ '%s'", idx, start->valuestring);
+    enter_passage(start->valuestring);
+}
+
+void plip_gamebook_begin(void)
+{
+    plip_gamebook_end();   // clean any previous run
+
+    s_lib_root = load_json(GB_LIBRARY);
+    if (!s_lib_root) return;
+    s_lib = cJSON_GetObjectItem(s_lib_root, "library");
+    if (!cJSON_IsArray(s_lib) || cJSON_GetArraySize(s_lib) == 0) {
+        cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL;
+        return;
+    }
+    s_lib_n = cJSON_GetArraySize(s_lib);
+    audio_pa_set(true);    // earpiece amplifier on
+    enter_menu();
+}
+
+void plip_gamebook_begin_random(void)
+{
+    plip_gamebook_end();   // clean any previous run
+
+    s_lib_root = load_json(GB_LIBRARY);
+    if (!s_lib_root) return;
+    s_lib = cJSON_GetObjectItem(s_lib_root, "library");
+    if (!cJSON_IsArray(s_lib) || cJSON_GetArraySize(s_lib) == 0) {
+        cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL;
+        return;
+    }
+    s_lib_n = cJSON_GetArraySize(s_lib);
+    audio_pa_set(true);    // earpiece amplifier on
+    int idx = (int)(esp_random() % (uint32_t)s_lib_n);
+    ESP_LOGI(TAG, "auto-start random story #%d/%d", idx, s_lib_n);
+    load_book(idx);        // straight into the story, no menu
+}
+
+void plip_gamebook_feed_digit(int d)
+{
+    if (s_mode == GB_MENU) {
+        if (d >= 1 && d <= s_lib_n) load_book(d - 1);
+        return;
+    }
+    if (s_mode == GB_STORY) {
+        const cJSON *p = cJSON_GetObjectItem(s_passages, s_current);
+        const cJSON *ch = cJSON_GetObjectItem(p, "choices");
+        int n = cJSON_IsArray(ch) ? cJSON_GetArraySize(ch) : 0;
+        if (n == 0) {                 // ending: 0 (or any) → back to menu
+            enter_menu();
+            return;
+        }
+        if (d >= 1 && d <= n) {
+            const cJSON *g = cJSON_GetObjectItem(cJSON_GetArrayItem(ch, d - 1),
+                                                 "goto");
+            if (cJSON_IsString(g)) {
+                ESP_LOGI(TAG, "choice %d -> '%s'", d, g->valuestring);
+                enter_passage(g->valuestring);
+            }
+        }
+        // out-of-range digit: ignore (player can dial again)
+    }
+}
+
+void plip_gamebook_end(void)
+{
+    if (s_mode == GB_OFF && !s_lib_root && !s_book) return;
+    s_mode = GB_OFF;
+    audio_stop();
+    free_story();
+    if (s_lib_root) { cJSON_Delete(s_lib_root); s_lib_root = NULL; s_lib = NULL; }
+    ESP_LOGI(TAG, "ended");
+}

plip_voice/main/plip_gamebook.h

@@ -0,0 +1,48 @@
+#pragma once
+// plip_gamebook — "livre dont vous êtes le héros" AUDIO pour le téléphone PLIP.
+//
+// Pas d'écran : tout passe par l'écouteur. On décroche, le narrateur lit le
+// menu des histoires ("pour le dragon, faites le 1..."), on compose un chiffre
+// au cadran pour choisir une histoire, puis à chaque passage le narrateur lit
+// le texte ET les choix numérotés ("pour examiner la machine, faites le 1..."),
+// et on compose le chiffre du choix. Raccrocher arrête tout.
+//
+// Lit /sdcard/gamebook/{library.json, menu.wav, <id>.json, <id>_<passage>.wav}
+// (pack audio "téléphone" produit par tools/gamebook/build_phone_gamebook.py,
+// où la narration des WAV inclut déjà les invites "faites le N"). 100% local,
+// aucun modèle, aucun réseau.
+//
+// Intégration : conversation.c lance plip_gamebook_begin() au décroché (si un
+// pack est présent sur la SD), pousse chaque chiffre composé via
+// plip_gamebook_feed_digit(), et appelle plip_gamebook_end() au raccroché.
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// La SD est-elle montée et un pack gamebook présent ? (à tester au décroché)
+bool plip_gamebook_available(void);
+
+// Démarre le mode livre-jeu : charge la bibliothèque et joue le menu audio.
+void plip_gamebook_begin(void);
+
+// Démarre directement UNE histoire tirée au hasard (sans passer par le menu) —
+// utilisé quand le téléphone sonne tout seul et qu'on décroche.
+void plip_gamebook_begin_random(void);
+
+// Traite un chiffre composé (0..9). Menu → choisit l'histoire ; en histoire →
+// choisit la réponse ; sur une fin → 0 revient au menu. Interrompt la
+// narration en cours pour enchaîner.
+void plip_gamebook_feed_digit(int digit);
+
+// Quitte le mode livre-jeu (raccroché) : stoppe l'audio, libère la mémoire.
+void plip_gamebook_end(void);
+
+// Vrai tant qu'une partie est en cours.
+bool plip_gamebook_active(void);
+
+#ifdef __cplusplus
+}
+#endif

plip_voice/sdkconfig.defaults

@@ -56,3 +56,6 @@ CONFIG_PLIP_HOOK_ACTIVE_HIGH=y
 # Long file names on the SD (voice sample pack uses >8.3 names)
 CONFIG_FATFS_LFN_HEAP=y
 CONFIG_FATFS_MAX_LFN=255
+
+# Speaker at max (earpiece)
+CONFIG_PLIP_SPEAKER_VOLUME=100