fix(round): disable agent + storage-gadget services at boot (ARMv6 SIGILL + UDC conflict)

Two boot-time failures observed in the rpiz journal (Pi Zero W BCM2835,
ARMv6):

1. `secubox-eye-agent.service` crashes in an infinite loop with
   `status=4/ILL` (SIGILL) every ~10s. The agent's `pip install fastapi`
   pulls Pydantic v2 whose `pydantic_core` is Rust-built and has no
   ARMv6 wheel — pip serves an ARMv7 wheel that the BCM2835 cannot
   execute. Since v2.2.1 the dashboard is rendered by
   `secubox-fallback-display.service` (pure-Python Pillow) anyway, so
   the agent is redundant for normal operation. Install the unit file
   but don't enable it at boot — leaves an explicit one-line
   `systemctl enable` for ARMv7+ users who need the FastAPI endpoint.

2. `secubox-eye-gadget.service` (storage-only, U-Boot rescue) and
   `secubox-otg-gadget.service` (composite ECM+ACM, normal operation)
   both auto-start at boot and fight for the dwc2 UDC. journal shows
   eye-gadget claims it first (`Storage-only gadget started on
   20980000.usb`), then ~1 min later otg-gadget says "Gadget déjà
   configuré, redémarrage…" and tears it down to reconfigure — racy and
   indeterministic; the MOCHAbin sometimes sees no gadget at all.
   Install eye-gadget unit but don't enable it at boot — recovery boot
   recipe documented inline.

Net effect after this fix: rpiz boots → HyperPixel inits → fallback
display draws → composite ECM+ACM gadget appears on the MOCHAbin → DHCP
client takes a lease from secubox-eye-remote-dhcp.service.

remote-ui/round/agent/display/fallback/fallback_manager.py

@@ -93,10 +93,15 @@ LOGO_PATHS = [
     Path("/etc/secubox/eye-remote/assets/phoenix_logo.png"),
 ]
 
-# Icon paths - module icons
+# Icon paths - module icons.
+# Order matters: first existing path wins per icon name. /var/www/common/
+# holds the real brand icons (auth, wall, boot, mind, root, mesh) installed
+# by build-eye-remote-image.sh; the local /usr/lib/secubox-eye/assets/icons/
+# fallback path holds the round-specific placeholder set.
 ICON_PATHS = [
     Path("/tmp/assets/icons"),
     Path("/etc/secubox/eye-remote/assets/icons"),
+    Path("/var/www/common/assets/icons"),
     Path(__file__).parent.parent.parent.parent / "assets" / "icons",
 ]
 

remote-ui/round/build-eye-remote-image.sh

@@ -650,9 +650,17 @@ mkdir -p "$ROOT_MNT/etc/systemd/system/dnsmasq.service.d"
 cp "$SCRIPT_DIR/files/etc/systemd/system/dnsmasq.service.d/secubox-eye.conf" \
     "$ROOT_MNT/etc/systemd/system/dnsmasq.service.d/"
 
-# Enable new gadget service
-ln -sf /etc/systemd/system/secubox-eye-gadget.service \
-    "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/"
+# secubox-eye-gadget is STORAGE-only mode for U-Boot rescue boot. Enabling
+# it alongside the composite secubox-otg-gadget.service (ECM+ACM, enabled
+# below) causes two services to fight for the UDC at boot: eye-gadget
+# claims it first as mass-storage, then otg-gadget tears it down to
+# reconfigure as composite — racy and indeterministic, the MOCHAbin
+# sometimes sees no gadget at all. Install the unit but DO NOT enable it
+# at boot. To enable U-Boot rescue mode manually:
+#     systemctl disable secubox-otg-gadget.service
+#     systemctl enable --now secubox-eye-gadget.service
+# ln -sf /etc/systemd/system/secubox-eye-gadget.service \
+#     "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/"
 
 # Copy framebuffer dashboard (Pi Zero W has no NEON, can't run Chromium)
 log "Installing framebuffer dashboard..."
@@ -684,18 +692,34 @@ if [[ -f "$SCRIPT_DIR/secubox-eye-agent.service" && -f "$SCRIPT_DIR/config.toml.
     # Install agent service
     cp "$SCRIPT_DIR/secubox-eye-agent.service" "$ROOT_MNT/etc/systemd/system/"
 
-    # Enable agent service via symlink (atomic, no chroot needed)
+    # The agent depends on Pydantic v2 (pydantic_core, Rust) which has no
+    # ARMv6 wheel — pip ships an ARMv7 wheel that crashes with SIGILL on
+    # the Pi Zero W BCM2835 (status=4/ILL, observed in journal).
+    # v2.2.1 design moved metrics rendering to secubox-fallback-display.service
+    # (pure-Python Pillow), so we install the unit file but DO NOT enable it
+    # at boot. To re-enable manually on an ARMv7+ board:
+    #     systemctl enable --now secubox-eye-agent.service
     mkdir -p "$ROOT_MNT/etc/systemd/system/multi-user.target.wants"
-    ln -sf /etc/systemd/system/secubox-eye-agent.service \
-        "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/"
+    # ln -sf /etc/systemd/system/secubox-eye-agent.service \
+    #     "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/"
 
     # v2.2.0: Install menu system icons for radial menu
     if [[ -d "$SCRIPT_DIR/assets/icons" ]]; then
         log "Installing menu system icons..."
         mkdir -p "$ROOT_MNT/usr/lib/secubox-eye/assets/icons"
         cp "$SCRIPT_DIR/assets/icons"/*.png "$ROOT_MNT/usr/lib/secubox-eye/assets/icons/" 2>/dev/null || true
+        # Defense-in-depth: also drop the brand-icon PNGs (auth/wall/boot/mind/
+        # root/mesh) from remote-ui/common/assets/icons/ into the same dir so
+        # any consumer that resolves icons only via /usr/lib/secubox-eye/ finds
+        # them. fallback_manager.py ALSO searches /var/www/common/assets/icons/
+        # directly — this is just a redundant shipping path.
+        _COMMON_ICONS="$(dirname "$SCRIPT_DIR")/common/assets/icons"
+        if [[ -d "$_COMMON_ICONS" ]]; then
+            cp -n "$_COMMON_ICONS"/*.png \
+                "$ROOT_MNT/usr/lib/secubox-eye/assets/icons/" 2>/dev/null || true
+        fi
         ICON_COUNT=$(ls "$ROOT_MNT/usr/lib/secubox-eye/assets/icons"/*.png 2>/dev/null | wc -l)
-        log "Installed $ICON_COUNT menu icons"
+        log "Installed $ICON_COUNT menu icons (round/ + common/ brand)"
     fi
 else
     warn "Eye Agent files not found, skipping installation"
@@ -766,7 +790,10 @@ ln -sf /etc/systemd/system/eye-firstboot-hostname.service "$ROOT_MNT/etc/systemd
 ln -sf /etc/systemd/system/hyperpixel2r-init.service "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/" 2>/dev/null || true
 
 # Eye Remote services
-ln -sf /etc/systemd/system/secubox-eye-gadget.service "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/" 2>/dev/null || true
+# secubox-eye-gadget (storage-only, U-Boot rescue) intentionally NOT enabled
+# at boot — it conflicts with the composite secubox-otg-gadget.service.
+# See the comment near line 653 for the manual-enable recipe.
+# ln -sf /etc/systemd/system/secubox-eye-gadget.service "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/" 2>/dev/null || true
 # v2.2.1: Use fallback-display instead of eye-agent (3D cube + rainbow rings, stable)
 ln -sf /etc/systemd/system/secubox-fallback-display.service "$ROOT_MNT/etc/systemd/system/multi-user.target.wants/" 2>/dev/null || true
 # NOTE: secubox-eye-agent is broken (import errors) - disabled pending fix