update install.sh: rename to NixOS Intuitive Navigation Assistant, fix prompt to always fire via /dev/tty, add post-install onboarding with color and spacing

@@ -1,48 +1,61 @@11 #!/bin/sh22 set -e33 4-banner() {5-  cat <<'BANNER'4+# ANSI color codes — empty when stdout/stderr is not a terminal5+if [ -t 2 ]; then6+  BOLD='\033[1m'7+  DIM='\033[2m'8+  CYAN='\033[36m'9+  GREEN='\033[32m'10+  YELLOW='\033[33m'11+  RESET='\033[0m'12+else13+  BOLD='' DIM='' CYAN='' GREEN='' YELLOW='' RESET=''14+fi615 7-        _8-  _ __ (_)_ __   __ _9- | '_ \| | '_ \ / _` |10- | | | | | | | | (_| |11- |_| |_|_|_| |_|\__,_|16+INSTALL_CMD="nix profile add https://kepr.uk/nina/archive/HEAD.tar.gz"1217 13-  NixOS helper  ·  kepr.uk/nina14-15-BANNER18+banner() {19+  printf >&2 '\n'20+  printf >&2 "${CYAN}        _${RESET}\n"21+  printf >&2 "${CYAN}  _ __ (_)_ __   __ _${RESET}\n"22+  printf >&2 "${CYAN} | '_ \\| | '_ \\ / _\` |${RESET}\n"23+  printf >&2 "${CYAN} | | | | | | | | (_| |${RESET}\n"24+  printf >&2 "${CYAN} |_| |_|_|_| |_|\\__,_|${RESET}\n"25+  printf >&2 '\n'26+  printf >&2 "  ${BOLD}NixOS Intuitive Navigation Assistant${RESET}  ${DIM}·${RESET}  ${DIM}kepr.uk/nina${RESET}\n"27+  printf >&2 '\n'1628 }1729 18-INSTALL_CMD="nix profile add https://kepr.uk/nina/archive/HEAD.tar.gz"19-2030 main() {21-  banner >&231+  banner2232 23-  cat >&2 <<'EOF'24-  The install script has been discontinued.33+  printf >&2 "  nina is installed directly with nix:\n\n"34+  printf >&2 "    ${YELLOW}%s${RESET}\n\n" "$INSTALL_CMD"2535 26-  nina is now installed directly with nix — no script needed:36+  # Always prompt via /dev/tty so this works when piped through curl | sh37+  printf >&2 "  Run it now? [Y/n] "38+  read -r answer </dev/tty39+  case "${answer:-y}" in40+    [nN]*)41+      printf >&2 '\n  Copy the command above and run it whenever you are ready.\n\n'42+      exit 043+      ;;44+  esac45+  printf >&2 '\n'2746 28-EOF29-30-  printf '    %s\n\n' "$INSTALL_CMD" >&231-32-  if [ -t 0 ]; then33-    printf '  Run it now? [Y/n] ' >&234-    read -r answer >&2 </dev/tty35-    case "${answer:-y}" in36-      [nN]*)37-        printf '\n  Copy the command above and run it whenever you are ready.\n\n' >&238-        exit 039-        ;;40-    esac41-    printf '\n' >&242-  fi43-4447   nix profile add https://kepr.uk/nina/archive/HEAD.tar.gz45-  printf '\n  Done. Try: nina --version\n\n' >&248+49+  printf >&2 '\n'50+  printf >&2 "  ${GREEN}${BOLD}✓ Thank you for installing nina!${RESET}\n"51+  printf >&2 '\n'52+  printf >&2 "  ${BOLD}Getting started${RESET}\n\n"53+  printf >&2 "    ${CYAN}nina help${RESET}       — explore what nina can do\n"54+  printf >&2 "    ${CYAN}nina goodbye${RESET}    — remove nina cleanly if it's not a good fit\n"55+  printf >&2 '\n'56+  printf >&2 "  ${BOLD}Issues & feedback${RESET}\n\n"57+  printf >&2 "    ${DIM}https://${RESET}kepr.uk/nina   ${DIM}— no account required${RESET}\n"58+  printf >&2 '\n'4659 }4760 4861 main