Say "CoreDesktop is installed." at the end of every install

When configure had nothing left to do, install.sh ended on the kernel check
and the firewall's warnings just above it, so a successful run could be taken
for a failure. Move the end of install.sh to system/finish-install.sh, which
now says the install worked before the reboot advice and configure offer, and
test it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

install.sh

@@ -292,29 +292,5 @@ fi
 echo "Running migrations..."
 run_migrations
 
-CONFIGURE_HINT="configure connects to your Federated Core, sets up backups and signs you in to the AI agents."
-
-# If the running kernel's modules are gone, a newer kernel was installed during
-# this run. configure waits for the reboot: until then, modules it needs, such
-# as Tailscale's tun and davfs2's fuse, can't be loaded.
-if [ ! -d "/usr/lib/modules/$(uname -r)" ]; then
-  echo "A newer kernel has been installed. Reboot, then run: configure"
-  echo "$CONFIGURE_HINT"
-  exit 0
-fi
-echo "Kernel is up to date, no reboot needed. You may want to consider a reboot if other significant software was updated or installed."
-
-# Offer configure only if something is still to do, as refresh runs this too.
-# This script is usually piped into bash, so ask on the terminal, not stdin.
-if ~/.local/bin/configure --list | grep -q '^to do'; then
-  echo
-  echo "$CONFIGURE_HINT"
-  if { : < /dev/tty; } 2> /dev/null && read -rp "Run configure now? [Y/n] " answer < /dev/tty \
-      && [[ "$answer" != [nN]* ]]; then
-    # Straight to the terminal, outside the log: sign-ins need a terminal, and
-    # their codes and links don't belong in a log
-    ~/.local/bin/configure < /dev/tty > /dev/tty 2>&1 || true
-  else
-    echo "To do it later, run: configure"
-  fi
-fi
+# Say the install worked, whether to reboot, and offer configure
+bash ~/.local/share/coredesktop/system/finish-install.sh