Refactor route handling in panelctl.sh and update caddy configuration for improved route management

Co-authored-by: Copilot <copilot@github.com>

panelctl.sh

@@ -76,7 +76,7 @@ app_volume_dir() {
 
 app_route_file() {
   local name="$1"
-  echo "${ROUTES_DIR}/${name}.caddy"
+  echo "${ROUTES_DIR}/routes.caddy"
 }
 
 load_app() {
@@ -248,12 +248,29 @@ cmd_render_route() {
     auth_block="${FORWARD_AUTH_BLOCK}"
   fi
 
-  cat >"${APP_ROUTE_FILE}" <<EOF
-${APP_DOMAIN} {
-${auth_block}  reverse_proxy ${APP_UPSTREAM}
-}
-EOF
+  # Append to aggregate routes file (idempotent: remove stale block first).
+  local tmp
+  tmp="$(mktemp)"
 
+  # Strip any existing block for this app from the aggregate file.
+  if [[ -f "${APP_ROUTE_FILE}" ]]; then
+    grep -v "^# route:${name}:" "${APP_ROUTE_FILE}" >"${tmp}"
+  else
+    printf "" >"${tmp}"
+  fi
+
+  {
+    printf "# route:%s:start\n" "${name}"
+    printf "%s {\n" "${APP_DOMAIN}"
+    if [[ -n "${auth_block}" ]]; then
+      printf "%s\n" "${auth_block}"
+    fi
+    printf "  reverse_proxy %s\n" "${APP_UPSTREAM}"
+    printf "}\n"
+    printf "# route:%s:end\n" "${name}"
+  } >>"${tmp}"
+
+  mv "${tmp}" "${APP_ROUTE_FILE}"
   echo "rendered route ${APP_ROUTE_FILE}"
 }
 
@@ -306,7 +323,15 @@ cmd_remove() {
 
   run_compose -f "${APP_COMPOSE_FILE}" down || true
 
-  rm -f "${APP_ROUTE_FILE}" "$(app_manifest "${name}")"
+  # Remove this app's block from the aggregate routes file.
+  if [[ -f "${APP_ROUTE_FILE}" ]]; then
+    local tmp
+    tmp="$(mktemp)"
+    grep -v "^# route:${name}:" "${APP_ROUTE_FILE}" >"${tmp}"
+    mv "${tmp}" "${APP_ROUTE_FILE}"
+  fi
+
+  rm -f "$(app_manifest "${name}")"
   rm -rf "${APP_STACK_DIR}"
 
   if [[ "${keep_volumes}" != "--keep-volumes" ]]; then