nextcloud/install: session-bus override, KWallet existence check, pass REPO vars

- sync_client_software.sh: add system-wide flatpak session-bus override for
  Nextcloud so KWallet D-Bus access works for all users; fix broken compound
  test ([ a || b ] → [ a ] || [ b ])
- user_run.sh: check KWallet entries with hasEntry before writing — skip write
  and print info message when both passwords are already present; remove stale
  commented-out code
- install.sh: forward REPO_URL and REPO_BRANCH into configure.sh environment
  for both the su- and direct-bash invocation paths
- configure.sh: simplify do_configure (user cleanup)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

system_setup/sync_client_software.sh

@@ -31,6 +31,9 @@ if [[ $? -ne 0 ]]; then
 fi
 echo ""
 
+# Ensure session bus access for Nextcloud (may be blocked by Flatseal or missing from manifest)
+/usr/bin/flatpak override --system --socket=session-bus com.nextcloud.desktopclient.nextcloud
+
 #Do an upgrade of the Base package if its configured and if there are changes
 chown root:${CLIENTADMINGROUP} -R ${SYSCONFIGPATH}
 chmod ug+rwX,o=rX -R ${SYSCONFIGPATH}
@@ -92,7 +95,7 @@ if [[ ! -z "${DISTCONFIGPATH_SRC}" ]]; then
             OLD_REPO_BRANCH="$REPO_BRANCH"
             source $(dirname "$0")/setup_system.inc.sh
             #Compare the Repository URLS after that
-            if [ "$REPO_URL" != "$OLD_REPO_URL" || "$REPO_BRANCH" != "$OLD_REPO_BRANCH" ]; then
+            if [ "$REPO_URL" != "$OLD_REPO_URL" ] || [ "$REPO_BRANCH" != "$OLD_REPO_BRANCH" ]; then
                 echo "The Repository for installation was"
                 echo "$OLD_REPO_URL Branch $OLD_REPO_BRANCH"
                 echo "After reading the config, the Repository has changed to"