FHS F2.3: kernel-overlays + locpath under /var/cache/archr

Two more Class C bridges, same pattern as F2.1/F2.2:
- /var/cache/archr/kernel-overlays -> /storage/.cache/kernel-overlays
- /var/cache/archr/locpath -> /storage/.cache/locpath

Consumers flipped to the Arch-friendly path:
- busybox/scripts/kernel-overlays-setup: OVERLAY_CONFIG_DIR
- busybox/profile.d/10-locale.conf: LOCPATH
- wayland/util/foot/scripts/foot.sh: LOCPATH (ArchR override only)

Service files (locale.service, kernel-overlays tmpfiles.d) keep
addressing the /storage backing path because they are the layer that
creates the actual rw overlay dir; the bridge symlink points at it.

Top-level packages/wayland/util/foot/scripts/foot.sh is upstream
LibreELEC heritage and stays untouched; the ArchR override is the
file the runtime actually executes.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/sysutils/busybox/profile.d/10-locale.conf

@@ -1,5 +1,7 @@
 # don't overwrite value set by Locale Kodi addon
 if [ -z "${LOCPATH}" ]; then
   export LANG="C.UTF-8"
-  export LOCPATH="/storage/.cache/locpath"
+  # FHS bridge: /var/cache/archr/locpath is a symlink installed by the
+  # archr meta-package pointing into /storage/.cache/locpath (rw overlay).
+  export LOCPATH="/var/cache/archr/locpath"
 fi

projects/ArchR/packages/archr/package.mk

@@ -50,8 +50,10 @@ EOF
   ### FHS bridge symlinks: make Arch-standard cache locations resolve into
   ### the /storage overlay. Apps and inspection tools see /var/cache/<x>;
   ### writes land in /storage/.cache/<x> (rw overlay).
-  mkdir -p ${INSTALL}/var/cache
+  mkdir -p ${INSTALL}/var/cache/archr
   ln -sf /storage/.cache/mesa_shader_cache ${INSTALL}/var/cache/mesa
+  ln -sf /storage/.cache/kernel-overlays   ${INSTALL}/var/cache/archr/kernel-overlays
+  ln -sf /storage/.cache/locpath           ${INSTALL}/var/cache/archr/locpath
 }
 
 post_install() {

projects/ArchR/packages/sysutils/busybox/scripts/kernel-overlays-setup

@@ -4,7 +4,7 @@
 # Copyright (C) 2017-present Team LibreELEC (https://libreelec.tv)
 
 SYSTEM_OVERLAYS_DIR=/usr/lib/kernel-overlays
-OVERLAY_CONFIG_DIR=/storage/.cache/kernel-overlays
+OVERLAY_CONFIG_DIR=/var/cache/archr/kernel-overlays
 KVER=$(uname -r)
 RUNTIME_DIR="/run/kernel-overlays"
 MODULES_DIR="${RUNTIME_DIR}/modules/${KVER}"

projects/ArchR/packages/wayland/util/foot/scripts/foot.sh

@@ -12,7 +12,7 @@ if [ ! -f ${FOOT_CONFIG_DIR}/foot.ini ]; then
 fi
 
 if [ -z "${LOCPATH}" ]; then
-  export LOCPATH="/storage/.cache/locpath"
+  export LOCPATH="/var/cache/archr/locpath"
 fi
 
 /usr/bin/foot > ${FOOT_LOG_FILE} 2>&1