Migrate 4 more Advanced items (Electron, Factory Reset, Virtual Consoles, Emergency Hotspot); bump to v2.11.0

New in install.sh's Advanced menu, alongside Diagnostics:
- menus/advanced_electron.sh: "Electron Maintenance" - the legacy
  "Manual Electron Update" and "Fix Blank Screen" combined into one
  submenu, sharing the binary-repair logic (electron_install_binary).
- menus/advanced_factory_reset.sh: "Factory Reset" - wipes config.json
  back to defaults only; addons are untouched.
- menus/advanced_virtual_consoles.sh: "Virtual Consoles" - toggles
  Ctrl+Alt+F1-F8 terminal login access.
- menus/advanced_emergency_hotspot.sh: "Emergency Hotspot" - auto-starts
  a WiFi hotspot if no internet is detected 60 seconds after boot. Its
  own runtime script and systemd unit now go through $BIN_DIR/
  $SYSTEMD_DIR like every other addon's own files, instead of the
  legacy's hardcoded /usr/local/bin and /etc/systemd/system.

That covers 8 of the legacy Advanced menu's 12 entries. Not migrated
this round: Export/Import Settings (pending a decision on rebuilding it
around actual paths vs. a hardcoded step list, or whether the future
web UI replaces the need for it) and Fix Squeezelite Audio (small
enough it may fold into the LMS addon instead of staying standalone).

Full command-level stubbed test suite per file, including set -e safety
checks (declined/failed paths never crash the session) and content
verification for every written file. Full 18-suite regression + real
end-to-end menu navigation via install.sh all pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VfsFSoRqfbRG7XAg5RoE7e

install.sh

@@ -22,7 +22,11 @@
 #     Squeezelite Player (menus/addon_lms_squeezelite.sh), Asterisk
 #     Intercom - SIP extension client (menus/addon_asterisk_intercom.sh).
 #   Advanced: Diagnostics (menus/diagnostics.sh - system status/logs/
-#     audio/network).
+#     audio/network), Electron Maintenance (menus/advanced_electron.sh -
+#     manual update, fix blank screen), Factory Reset
+#     (menus/advanced_factory_reset.sh), Virtual Consoles
+#     (menus/advanced_virtual_consoles.sh), Emergency Hotspot
+#     (menus/advanced_emergency_hotspot.sh).
 #
 # Usage (once the kiosk has already been installed):
 #   git clone <repo>
@@ -64,6 +68,14 @@ source "$SCRIPT_DIR/menus/addon_remote_access.sh"
 source "$SCRIPT_DIR/menus/addon_lms_squeezelite.sh"
 # shellcheck source=menus/addon_asterisk_intercom.sh
 source "$SCRIPT_DIR/menus/addon_asterisk_intercom.sh"
+# shellcheck source=menus/advanced_electron.sh
+source "$SCRIPT_DIR/menus/advanced_electron.sh"
+# shellcheck source=menus/advanced_factory_reset.sh
+source "$SCRIPT_DIR/menus/advanced_factory_reset.sh"
+# shellcheck source=menus/advanced_virtual_consoles.sh
+source "$SCRIPT_DIR/menus/advanced_virtual_consoles.sh"
+# shellcheck source=menus/advanced_emergency_hotspot.sh
+source "$SCRIPT_DIR/menus/advanced_emergency_hotspot.sh"
 
 ################################################################################
 # Preflight
@@ -136,8 +148,8 @@ addons_menu() {
 }
 
 advanced_menu_builder() {
-    MENU_LABELS=("Diagnostics")
-    MENU_HANDLERS=(diagnostics_menu)
+    MENU_LABELS=("Diagnostics" "Electron Maintenance" "Factory Reset" "Virtual Consoles" "Emergency Hotspot")
+    MENU_HANDLERS=(diagnostics_menu advanced_electron_menu advanced_factory_reset_menu advanced_virtual_consoles_menu advanced_emergency_hotspot_menu)
 }
 
 advanced_menu() {