feat(installer): show network-security notice at end of install/update

install.sh now prints the loopback-bind security notice as the final block of
both the one-line fresh install and the update flow, so it stays visible. Also
documents that gesture control remains opt-in / default-off (changeset).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "aicodeman",
-  "version": "0.9.2",
+  "version": "0.9.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "aicodeman",
-      "version": "0.9.2",
+      "version": "0.9.3",
       "hasInstallScript": true,
       "license": "MIT",
       "workspaces": [