Fix stdin: use targeted /dev/tty redirects instead of exec

The exec < /dev/tty approach silently killed the script under set -e
if /dev/tty wasn't accessible. Replace with surgical redirects on
just the interactive reads and setup.sh invocation.

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

install.sh

@@ -50,13 +50,6 @@ show_progress() {
     fi
 }
 
-# --- Reclaim stdin for interactive prompts ---
-# When run via `curl ... | bash`, stdin is the pipe. Reopen it from
-# the terminal so read prompts (setup wizard, confirmations) work.
-if [ ! -t 0 ]; then
-    exec < /dev/tty
-fi
-
 header "WebsiteBox Installer"
 
 # --- Check for root/sudo ---
@@ -102,7 +95,7 @@ case "$OS_ID" in
     *)
         warn "Unsupported OS detected (${OS_ID} ${OS_VERSION})."
         warn "WebsiteBox is tested on Ubuntu 20.04+ and Debian 11+."
-        read -rp "Continue anyway? (y/N) " cont
+        read -rp "Continue anyway? (y/N) " cont < /dev/tty
         if [ "$cont" != "y" ] && [ "$cont" != "Y" ]; then
             exit 1
         fi
@@ -257,9 +250,9 @@ echo ""
 if [ "$DOCKER_JUST_INSTALLED" = true ] && [ "$ACTUAL_USER" != "root" ]; then
     # Activate docker group for this session without requiring logout/login
     info "Activating Docker permissions for current session..."
-    sg docker -c "./setup.sh"
+    sg docker -c "./setup.sh < /dev/tty"
 else
-    ./setup.sh
+    ./setup.sh < /dev/tty
 fi
 
 echo ""