feat: QA test suite (12 stages, 205 tests) + Chrome DevTools MCP config

- Add tests/ directory with 12 bash/curl/jq test stages covering all API endpoints
- Add tests/lib/common.sh shared library with assertions and helpers
- Add tests/run-all.sh orchestrator script
- Update CLAUDE.md with test data reference and DevTools MCP docs
- Increase dev rate limit to 5000 for test suite runs
- Configure Chrome DevTools MCP in project settings

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

tests/run-all.sh

@@ -0,0 +1,66 @@
+#!/usr/bin/env bash
+set -uo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/lib/common.sh"
+
+FAILED_STAGES=()
+PASSED_STAGES=()
+TOTAL_STAGES=0
+
+run_stage() {
+  local script="$1" name="$2"
+  ((TOTAL_STAGES++))
+  sleep 1  # Brief pause between stages to avoid overwhelming the server
+  if bash "$SCRIPT_DIR/$script"; then
+    PASSED_STAGES+=("$name")
+  else
+    FAILED_STAGES+=("$name")
+  fi
+}
+
+echo ""
+printf "${BOLD}╔══════════════════════════════════════════╗${NC}\n"
+printf "${BOLD}║   Marketplace QA Test Suite              ║${NC}\n"
+printf "${BOLD}╚══════════════════════════════════════════╝${NC}\n"
+echo "  API:    ${BASE_URL:-http://localhost:3000}"
+echo "  Client: ${CLIENT_URL:-http://localhost:5173}"
+echo ""
+
+run_stage "stage-01-infrastructure.sh" "Infrastructure"
+run_stage "stage-02-auth.sh"           "Authentication"
+run_stage "stage-03-public.sh"         "Public Endpoints"
+run_stage "stage-04-user-crud.sh"      "User CRUD"
+run_stage "stage-05-listings.sh"       "Listings Workflow"
+run_stage "stage-06-offers.sh"         "Offers Workflow"
+run_stage "stage-07-rentals.sh"        "Rental Workflow"
+run_stage "stage-08-subscriptions.sh"  "Subscriptions"
+run_stage "stage-09-chat-notifications.sh" "Chat & Notifications"
+run_stage "stage-10-admin.sh"          "Admin Operations"
+run_stage "stage-11-edge-cases.sh"     "Edge Cases"
+
+# Stage 12 only if client running
+CLIENT_STATUS=$(curl -s -o /dev/null -w "%{http_code}" "${CLIENT_URL:-http://localhost:5173}" 2>/dev/null)
+if [[ "$CLIENT_STATUS" == "200" ]]; then
+  run_stage "stage-12-client-pages.sh" "Client Pages"
+else
+  printf "\n${YELLOW}SKIP: Client not running — Stage 12 skipped${NC}\n"
+fi
+
+# Final report
+echo ""
+printf "${BOLD}╔══════════════════════════════════════════╗${NC}\n"
+printf "${BOLD}║          FINAL RESULTS                   ║${NC}\n"
+printf "${BOLD}╚══════════════════════════════════════════╝${NC}\n"
+printf "  Stages passed: ${GREEN}%d${NC} / %d\n" "${#PASSED_STAGES[@]}" "$TOTAL_STAGES"
+
+if [[ ${#FAILED_STAGES[@]} -gt 0 ]]; then
+  printf "  ${RED}Failed stages:${NC}\n"
+  for s in "${FAILED_STAGES[@]}"; do
+    printf "    ${RED}✗ %s${NC}\n" "$s"
+  done
+  exit 1
+else
+  printf "  ${GREEN}ALL STAGES PASSED${NC}\n"
+  exit 0
+fi