fix(install): run onboarding + profile wizard in curl|bash (gate on stdin, not stdout)

web-install.sh tees stdout to a logfile (exec > >(tee) 2>&1), so -t 1 is false
even in an interactive curl|bash. The /dev/tty fix reattached stdin but the
wizard gates required BOTH -t 0 and -t 1, so onboarding (language select) and
bootstrap's profile wizard were silently skipped on the primary install path.
Prompts go to stderr and read from stdin — interactive stdin is the only real
requirement (already the proven pattern in lib-plan.sh confirm screen).

Gates now require interactive stdin only:
  bootstrap.sh       profile wizard
  lib-onboarding.sh  onboarding_should_run + preflight-continue prompt
  lib-preflight.sh   CLI-install offer prompt
  lib-hooks.sh       activate-hooks prompt

Non-interactive (CI / </dev/null / no /dev/tty) still skips — verified.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

bootstrap.sh

@@ -48,7 +48,10 @@ done
 # fallback to cortex for compat with v0.16 default behaviour.
 prompt_profile() {
     if [ -n "$PROFILE" ]; then return 0; fi
-    if [ ! -t 0 ] || [ ! -t 1 ]; then PROFILE="cortex"; return 0; fi
+    # Interactive iff stdin is a terminal. NOT stdout: web-install.sh tees stdout
+    # to a logfile (pipe), so -t 1 is false even in an interactive curl|bash.
+    # Prompts print to the terminal via tee; the menu reads from stdin.
+    if [ ! -t 0 ]; then PROFILE="cortex"; return 0; fi
     cat <<'WIZARD'
 
 ╔═══════════════════════════════════════════════════════════════════╗

install/lib-hooks.sh

@@ -129,7 +129,7 @@ maybe_activate_hooks() {
   elif [ ! -f "$settings_file" ]; then
     say "no existing settings.json; installing snippet"
     activate_hooks && DID_ACTIVATE=1
-  elif [ -t 0 ] && [ -t 1 ]; then
+  elif [ -t 0 ]; then  # stdin-only: stdout may be tee'd in curl|bash
     if [ "$COLOR" = "1" ]; then
       printf '\033[1;36m[install]\033[0m activate hooks now? [y/N] '
     else

install/lib-onboarding.sh

@@ -41,8 +41,11 @@ REGISTRY_MODELS="$KIT_DIR/_blocks/registries/models.toml"
 onboarding_should_run() {
   [ -f "$ONBOARDED_FLAG" ]    && return 1
   [ "${KEISEI_SKIP_ONBOARD:-}" = "1" ] && return 1
+  # Interactive iff stdin is a terminal. We deliberately do NOT require -t 1:
+  # the curl|bash bootstrapper (web-install.sh) tees stdout to a logfile, so
+  # -t 1 is false even in an interactive session. Prompts go to stderr, input
+  # reads from stdin — an interactive stdin is the only real requirement.
   [ ! -t 0 ] && return 1
-  [ ! -t 1 ] && return 1
   return 0
 }
 
@@ -66,7 +69,7 @@ onboarding_run() {
     if ! preflight_run "$ONBOARDING_PROVIDER"; then
       echo "" >&2
       echo "  ⚠ ${STR_PREFLIGHT_FAILED:-Preflight failed — provider may not work.}" >&2
-      if [ -t 0 ] && [ -t 1 ]; then
+      if [ -t 0 ]; then  # stdin-only: stdout may be tee'd in curl|bash
         read -r -p "  ${STR_PREFLIGHT_CONTINUE:-Continue anyway? [y/N]} " _ans
         case "$_ans" in
           y|Y|yes|да|Да)

install/lib-preflight.sh

@@ -25,7 +25,7 @@ preflight_offer_install() {
   echo "  ⚠ $cli не найден." >&2
   echo "  Установить: $install_cmd" >&2
   echo "" >&2
-  if [ -t 0 ] && [ -t 1 ]; then
+  if [ -t 0 ]; then  # stdin-only: stdout may be tee'd in curl|bash
     echo "  ⓘ команда: $install_cmd" >&2
     read -r -p "  Поставить сейчас? [y/N/skip] " ans
     case "$ans" in