build(histoires): manifest parser + LVGL stdio FS

Register audio/podcast_manifest.c in the SRCS list so the new JSON
manifest parser is compiled. Enable CONFIG_LV_USE_FS_STDIO (letter 'S')
in sdkconfig so LVGL can open cover images via fopen("/sdcard/...").

main/CMakeLists.txt

@@ -15,6 +15,7 @@ set(srcs
     "net/wifi.c"
     "net/sntp_time.c"
     "net/weather.c"
+    "net/udp_log.c"
     "ui/ui.c"
     "ui/fr_date.c"
     "ui/icons.c"
@@ -24,16 +25,31 @@ set(srcs
     "modes/calm.c"
     "modes/clock.c"
     "modes/games.c"
+    "modes/balloons.c"
+    "modes/podcasts.c"
     "audio/audio_player.c"
     "audio/radio_pipeline.c"
     "audio/sd_player.c"
+    "audio/aac_player.c"
+    "audio/calm_tone.c"
+    "audio/podcast_manifest.c"
+    "net/podcast.c"
 )
 
+# Generated colour icon image descriptors (ui/assets/*.c, Twemoji -> LVGL).
+file(GLOB lisael_icon_srcs "${CMAKE_CURRENT_SOURCE_DIR}/ui/assets/*.c")
+list(APPEND srcs ${lisael_icon_srcs})
+
+# Generated Fredoka fonts with French accents (ui/fonts/*.c).
+file(GLOB lisael_font_srcs "${CMAKE_CURRENT_SOURCE_DIR}/ui/fonts/*.c")
+list(APPEND srcs ${lisael_font_srcs})
+
 set(reqs
     nvs_flash
     esp_wifi
     esp_event
     esp_netif
+    lwip              # lwip/sockets.h for the UDP log sink
     esp-tls
     esp_http_client
     mbedtls          # esp_crt_bundle_attach (CA bundle for HTTPS)
@@ -42,6 +58,9 @@ set(reqs
     fatfs
     esp_driver_i2c
     esp_driver_tsens  # driver/temperature_sensor.h (internal die temp)
+    esp_driver_i2s    # i2s_slot_mode_t in the audio-player clock callback
+    chmorgan__esp-audio-player  # MP3 -> PCM player (SD playback, no ESP-ADF)
+    espressif__esp_audio_codec  # AAC/M4A simple decoder (podcast self-test)
 )
 
 # ESP-ADF audio components. Names follow the ADF master component tree.
@@ -60,3 +79,13 @@ idf_component_register(
     INCLUDE_DIRS "."
     REQUIRES ${reqs}
 )
+
+# GCC 14 (-Werror=array-bounds) émet un faux positif sur l'indexation gardée
+# de s_screens[mode] dans ui.c (la garde (unsigned)mode < COUNT est ignorée par
+# l'analyse de plage). On désarme l'erreur pour ce composant uniquement.
+target_compile_options(${COMPONENT_LIB} PRIVATE -Wno-error=array-bounds)
+
+# The generated icon descriptors (ui/assets/*.c) pick their LVGL header via
+# LV_LVGL_H_INCLUDE_* macros; without one they fall back to "lvgl/lvgl.h"
+# which isn't on the include path. Force the simple "lvgl.h" include.
+target_compile_definitions(${COMPONENT_LIB} PRIVATE LV_LVGL_H_INCLUDE_SIMPLE=1)