fix(setup): update end screen with correct npm package name and install paths

Replace node .mex/dist/cli.js commands and npm link tip with three
clear install paths: npx promexeus (zero install), global install,
and devDependency with package.json scripts.

Author: theDakshJaitly

setup.sh

@@ -529,20 +529,27 @@ if [ "$SELECTED_CLAUDE" -eq 1 ] && command -v claude &>/dev/null; then
   echo ""
   ok "Setup complete."
   echo ""
-  header "What's next"
-  echo ""
-  info "Verify — start a fresh session and ask:"
+  info "Verify your scaffold:"
+  echo "    Start a fresh session and ask your AI tool:"
   echo "    \"Read .mex/ROUTER.md and tell me what you know about this project.\""
   echo ""
-  info "Available commands (run from project root):"
-  echo "    node .mex/dist/cli.js check          Drift score — are scaffold files still accurate?"
-  echo "    node .mex/dist/cli.js check --quiet   One-liner drift score"
-  echo "    node .mex/dist/cli.js sync            Fix drift — AI updates only what's broken"
-  echo "    node .mex/dist/cli.js watch           Auto-check drift after every commit"
-  echo "    bash .mex/sync.sh                     Interactive sync menu"
-  echo "    bash .mex/update.sh                   Pull latest mex without touching your content"
+  info "Run commands with npx (no install needed):"
+  echo "    npx promexeus check         Drift score"
+  echo "    npx promexeus check --quiet  One-liner"
+  echo "    npx promexeus sync          Fix drift"
+  echo "    npx promexeus watch         Auto-check after every commit"
+  echo ""
+  info "Or install globally for shorter commands:"
+  echo "    npm install -g promexeus"
+  echo "    mex check / mex sync / mex watch"
   echo ""
-  info "Tip: run ${BOLD}cd .mex && npm link && cd ..${NC} to use ${BOLD}mex${NC} instead of ${BOLD}node .mex/dist/cli.js${NC}"
+  info "Or add to your package.json scripts:"
+  echo "    npm install --save-dev promexeus"
+  echo ""
+  echo "    \"scripts\": {"
+  echo "      \"mex\": \"mex check\","
+  echo "      \"mex:sync\": \"mex sync\""
+  echo "    }"
 
 else
   # Fallback — print the prompt for manual use
@@ -570,13 +577,27 @@ else
   echo ""
   ok "Paste the prompt above into your agent to populate the scaffold."
   echo ""
-  header "After your agent finishes, you can use"
+  ok "Setup complete."
+  echo ""
+  info "Verify your scaffold:"
+  echo "    Start a fresh session and ask your AI tool:"
+  echo "    \"Read .mex/ROUTER.md and tell me what you know about this project.\""
+  echo ""
+  info "Run commands with npx (no install needed):"
+  echo "    npx promexeus check         Drift score"
+  echo "    npx promexeus check --quiet  One-liner"
+  echo "    npx promexeus sync          Fix drift"
+  echo "    npx promexeus watch         Auto-check after every commit"
+  echo ""
+  info "Or install globally for shorter commands:"
+  echo "    npm install -g promexeus"
+  echo "    mex check / mex sync / mex watch"
   echo ""
-  echo "    node .mex/dist/cli.js check          Drift score — are scaffold files still accurate?"
-  echo "    node .mex/dist/cli.js sync            Fix drift — AI updates only what's broken"
-  echo "    node .mex/dist/cli.js watch           Auto-check drift after every commit"
-  echo "    bash .mex/sync.sh                     Interactive sync menu"
-  echo "    bash .mex/update.sh                   Pull latest mex without touching your content"
+  info "Or add to your package.json scripts:"
+  echo "    npm install --save-dev promexeus"
   echo ""
-  info "Tip: run ${BOLD}cd .mex && npm link && cd ..${NC} to use ${BOLD}mex${NC} instead of ${BOLD}node .mex/dist/cli.js${NC}"
+  echo "    \"scripts\": {"
+  echo "      \"mex\": \"mex check\","
+  echo "      \"mex:sync\": \"mex sync\""
+  echo "    }"
 fi