feat(demo): add deep HTTP and browser validation layers

The existing smoke test only checked TCP port connectivity, which cannot
detect a service that accepts connections but returns errors or serves
the wrong content (exactly how the broken Kiwix slipped through).

Add two new validation layers:

1. validate-http.sh — curls every service's health/UI endpoint and
   asserts both the HTTP status code AND meaningful body content (JSON
   health fields like "database":"ok", XML markers, page strings). Also
   verifies Kiwix has a ZIM actually loaded via its OPDS catalog feed.

2. run-browser-tests.sh — drives a real headless Chromium via the
   official Playwright Docker image (no host Node install needed) to
   confirm pages render correctly after JavaScript execution and SPA
   hydration. Updated playwright-services.spec.ts with correct content
   tokens and a waitForFunction step that reliably handles SPA timing.

Both are wired into demo-test.sh (new `http` and `browser` subcommands)
and the full test suite. AGENTS.md and demo/AGENTS.md updated with the
new commands and protocols.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

demo/AGENTS.md

@@ -254,6 +254,10 @@ screen -S demo-deploy-$(date +%Y%m%d-%H%M%S) -dm -L -Logfile deploy-$(date +%Y%m
 ./scripts/demo-test.sh security    # Security compliance validation
 ./scripts/demo-test.sh permissions # File ownership validation
 ./scripts/demo-test.sh network     # Network isolation validation
+./scripts/demo-test.sh http        # HTTP response validation (status + content)
+./scripts/demo-test.sh browser     # Browser validation via Playwright Docker image
+./scripts/validate-http.sh         # Standalone HTTP validation
+./tests/e2e/run-browser-tests.sh   # Standalone browser validation
 ```
 
 ### Automated Validation Suite
@@ -262,6 +266,8 @@ screen -S demo-deploy-$(date +%Y%m%d-%H%M%S) -dm -L -Logfile deploy-$(date +%Y%m
 - **Docker Group**: Confirm docker group access for socket proxy
 - **Service Health**: All services passing health checks
 - **Port Accessibility**: Verify all ports accessible from host
+- **HTTP Response Validation**: `validate-http.sh` confirms every service returns correct HTTP status code AND expected body content (JSON health fields, XML markers, page strings)
+- **Browser Validation**: `run-browser-tests.sh` drives a real headless Chromium via the Playwright Docker image to confirm pages render with expected content (executes JavaScript, waits for SPA hydration)
 - **Network Isolation**: Confirm services isolated in demo network
 - **Volume Permissions**: Validate Docker volume permissions
 - **Security Compliance**: Docker socket proxy restrictions enforced

demo/scripts/demo-test.sh

@@ -200,6 +200,7 @@ run_full_tests() {
     test_network_isolation || true
     test_volume_permissions || true
     test_security_compliance || true
+    bash "$SCRIPT_DIR/validate-http.sh" || true
     display_test_results
 }
 
@@ -227,6 +228,18 @@ run_network_tests() {
     display_test_results
 }
 
+run_http_tests() {
+    log_info "Running HTTP response validation..."
+    bash "$SCRIPT_DIR/validate-http.sh" || log_warning "Some HTTP checks failed"
+    display_test_results
+}
+
+run_browser_tests() {
+    log_info "Running browser (Playwright) validation..."
+    bash "$PROJECT_ROOT/tests/e2e/run-browser-tests.sh" || log_warning "Some browser checks failed"
+    display_test_results
+}
+
 display_test_results() {
     echo ""
     echo "===================================="
@@ -250,8 +263,10 @@ main() {
         security)    run_security_tests ;;
         permissions) run_permission_tests ;;
         network)     run_network_tests ;;
+        http)        run_http_tests ;;
+        browser)     run_browser_tests ;;
         help|--help|-h)
-            echo "Usage: $0 {full|security|permissions|network|help}"
+            echo "Usage: $0 {full|security|permissions|network|http|browser|help}"
             ;;
         *) log_error "Unknown: $1"; exit 1 ;;
     esac

demo/scripts/validate-all.sh

@@ -47,9 +47,11 @@ validate_shell_scripts() {
         "scripts/demo-stack.sh"
         "scripts/demo-test.sh"
         "scripts/validate-all.sh"
+        "scripts/validate-http.sh"
         "tests/unit/test_env_validation.sh"
         "tests/integration/test_service_communication.sh"
         "tests/e2e/test_deployment_workflow.sh"
+        "tests/e2e/run-browser-tests.sh"
     )
     for shell_file in "${shell_files[@]}"; do
         if [[ -f "$DEMO_DIR/$shell_file" ]]; then

demo/scripts/validate-http.sh

@@ -0,0 +1,143 @@
+#!/bin/bash
+# TSYS Developer Support Stack - Deep HTTP Validation
+# Purpose: post-deployment validation that services actually serve correct
+#          HTTP responses (status code + body content), not merely that a TCP
+#          port is open. A port being reachable does not prove a service works.
+#
+# Usage: ./scripts/validate-http.sh
+# Exit: 0 if all checks pass, 1 otherwise.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
+ENV_FILE="$PROJECT_ROOT/demo.env"
+
+if [[ ! -f "$ENV_FILE" ]]; then
+    echo "[ERROR] $ENV_FILE not found. Run ./scripts/demo-stack.sh deploy first." >&2
+    exit 1
+fi
+# shellcheck source=/dev/null
+set -a; source "$ENV_FILE"; set +a
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+BLUE='\033[0;34m'
+NC='\033[0m'
+
+PASS=0
+FAIL=0
+
+log_info()    { echo -e "${BLUE}[INFO]${NC} $1"; }
+log_pass()    { echo -e "${GREEN}[PASS]${NC} $1"; PASS=$((PASS + 1)); }
+log_fail()    { echo -e "${RED}[FAIL]${NC} $1"; FAIL=$((FAIL + 1)); }
+log_section() { echo -e "\n${BLUE}── $1 ──${NC}"; }
+
+# check_http NAME PORT PATH EXPECT_STATUS [CONTENT_SUBSTRING]
+# Follows redirects; HTTP status is the final response code.
+check_http() {
+    local name="$1" port="$2" path="$3" expect="$4" content="${5:-}"
+    local url="http://localhost:${port}${path}"
+    local body status
+    body=$(curl -sS -L --max-time 8 "$url" 2>/dev/null) || true
+    status=$(curl -sS -L -o /dev/null -w '%{http_code}' --max-time 8 "$url" 2>/dev/null || echo "000")
+
+    if [[ "$status" == "000" ]]; then
+        log_fail "$name ($url) unreachable"
+        return
+    fi
+    if [[ "$status" != "$expect" ]]; then
+        log_fail "$name ($url) expected HTTP $expect, got $status"
+        return
+    fi
+    if [[ -n "$content" ]]; then
+        if ! echo "$body" | grep -qi "$content"; then
+            log_fail "$name ($url) status $status but missing content \"$content\""
+            return
+        fi
+    fi
+    log_pass "$name ($url) -> $status${content:+ \"$content\"}"
+}
+
+# Specialised check helpers for services whose "healthy" state is best expressed
+# as a JSON field or an XML marker rather than a plain string.
+
+check_influxdb() {
+    # /health returns {"status":"pass", ...} when ready for queries
+    check_http "InfluxDB" "$INFLUXDB_PORT" "/health" "200" '"status":"pass"'
+}
+
+check_grafana() {
+    # Grafana pretty-prints its JSON, so match with optional whitespace.
+    local url="http://localhost:${GRAFANA_PORT}/api/health"
+    local body status
+    status=$(curl -sS -L -o /dev/null -w '%{http_code}' --max-time 8 "$url" 2>/dev/null || echo "000")
+    body=$(curl -sS -L --max-time 8 "$url" 2>/dev/null) || true
+    if [[ "$status" == "200" ]] && echo "$body" | grep -qiE '"database"[[:space:]]*:[[:space:]]*"ok"'; then
+        log_pass "Grafana ($url) -> 200 \"database\":\"ok\""
+    else
+        log_fail "Grafana ($url) expected database:ok, got $status"
+    fi
+}
+
+check_kiwix() {
+    # 1. The welcome page must render.
+    check_http "Kiwix UI" "$KIWIX_PORT" "/" "200" "welcome to kiwix server"
+    # 2. A ZIM must actually be loaded: the OPDS catalog lists at least one entry.
+    local url="http://localhost:${KIWIX_PORT}/catalog/v2/entries?count=1"
+    local body
+    body=$(curl -sS -L --max-time 8 "$url" 2>/dev/null) || true
+    if echo "$body" | grep -q "<entry>"; then
+        log_pass "Kiwix ZIM loaded (catalog has <entry>)"
+    else
+        log_fail "Kiwix ($url) no ZIM loaded (catalog feed missing <entry>)"
+    fi
+}
+
+run_http_validation() {
+    log_info "Deep HTTP validation of ${COMPOSE_PROJECT_NAME} services..."
+
+    log_section "Infrastructure"
+    check_http "Homepage"   "$HOMEPAGE_PORT" "/"   "200"
+    check_http "Pi-hole"    "$PIHOLE_PORT"    "/admin/" "200"
+    check_http "Dockhand"   "$DOCKHAND_PORT"  "/"   "200"
+
+    log_section "Monitoring & Observability"
+    check_influxdb
+    check_grafana
+    check_http "Metrics"    "$METRICS_PORT"   "/"   "200"
+    check_http "AppleHealth" "$APPLEHEALTH_PORT" "/health" "200" '"status":"healthy"'
+
+    log_section "Documentation & Diagramming"
+    check_http "Draw.io"    "$DRAWIO_PORT"    "/"   "200"
+    check_http "Kroki"      "$KROKI_PORT"     "/"   "200"
+    check_kiwix
+
+    log_section "Developer Tools"
+    check_http "AtomicTracker" "$ATOMIC_TRACKER_PORT" "/"   "200"
+    check_http "ArchiveBox"    "$ARCHIVEBOX_PORT" "/health/" "200" "OK"
+    check_http "TubeArchivist" "$TUBE_ARCHIVIST_PORT" "/api/health/" "200" "OK"
+    check_http "Wakapi"        "$WAKAPI_PORT"  "/"   "200"
+    check_http "MailHog"       "$MAILHOG_PORT" "/"   "200"
+    check_http "Atuin"         "$ATUIN_PORT"   "/healthz" "200" '"status":"healthy"'
+
+    log_section "Productivity"
+    check_http "ReactiveResume" "$REACTIVE_RESUME_PORT" "/api/health" "200"
+    check_http "ResumeMatcher"  "$RESUME_MATCHER_PORT"  "/api/v1/health" "200" '"status":"healthy"'
+
+    echo ""
+    echo "===================================="
+    echo "HTTP VALIDATION RESULTS"
+    echo "===================================="
+    echo -e "Passed: ${GREEN}$PASS${NC}"
+    echo -e "Failed: ${RED}$FAIL${NC}"
+    if [[ $FAIL -eq 0 ]]; then
+        echo -e "\n${GREEN}ALL HTTP CHECKS PASSED${NC}"
+        return 0
+    else
+        echo -e "\n${RED}HTTP VALIDATION FAILED${NC}"
+        return 1
+    fi
+}
+
+run_http_validation

demo/tests/e2e/playwright-services.spec.ts

@@ -5,7 +5,7 @@ const services = [
     name: 'Homepage',
     url: 'http://localhost:4000',
     contentCheck: 'tsys developer support stack',
-    titleCheck: 'TSYS Developer Support Stack',
+    waitUntil: 'networkidle',
   },
   {
     name: 'Pi-hole',
@@ -40,17 +40,20 @@ const services = [
   {
     name: 'Atomic Tracker',
     url: 'http://localhost:4012',
-    contentCheck: 'journal',
+    contentCheck: 'atomic',
+    waitUntil: 'networkidle',
   },
   {
     name: 'ArchiveBox',
     url: 'http://localhost:4013',
     contentCheck: 'archive',
+    waitUntil: 'networkidle',
   },
   {
     name: 'Tube Archivist',
     url: 'http://localhost:4014',
-    contentCheck: 'tubearchivist',
+    contentCheck: 'tube archivist',
+    waitUntil: 'networkidle',
   },
   {
     name: 'Wakapi',
@@ -71,6 +74,7 @@ const services = [
     name: 'Reactive Resume',
     url: 'http://localhost:4016',
     contentCheck: 'reactive',
+    waitUntil: 'networkidle',
   },
   {
     name: 'Metrics',
@@ -86,6 +90,7 @@ const services = [
     name: 'Resume Matcher',
     url: 'http://localhost:4023',
     contentCheck: 'resume',
+    waitUntil: 'networkidle',
   },
   {
     name: 'Apple Health',
@@ -97,12 +102,21 @@ const services = [
 for (const svc of services) {
   test(`${svc.name} (${svc.url}) loads successfully`, async ({ page }) => {
     const response = await page.goto(svc.url, {
-      waitUntil: 'domcontentloaded',
+      waitUntil: svc.waitUntil || 'domcontentloaded',
       timeout: 30000,
     });
     expect(response).not.toBeNull();
     expect(response!.status()).toBeLessThan(400);
 
+    // Wait for SPA-rendered content to appear (handles Next.js, React, etc.)
+    await page
+      .waitForFunction(
+        (expected: string) => (document.body.textContent || '').toLowerCase().includes(expected),
+        svc.contentCheck.toLowerCase(),
+        { timeout: 10000 }
+      )
+      .catch(() => {});
+
     const body = await page.textContent('body').catch(() => '');
     const title = await page.title().catch(() => '');
     const combined = (body + ' ' + title).toLowerCase();

demo/tests/e2e/run-browser-tests.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+# TSYS Developer Support Stack - Browser (Playwright) Validation
+# Purpose: drive a real headless browser against every service to validate that
+#          pages render and contain expected content. Deeper than HTTP probes:
+#          it executes JavaScript, waits for DOM ready, and checks rendered text.
+#
+# Runs entirely inside the official Playwright Docker image (no host Node/npm
+# install required). All npm artefacts stay inside the container's own
+# filesystem, so no root-owned files are written to the host. Host services are
+# reached via the host network.
+#
+# Usage: ./tests/e2e/run-browser-tests.sh
+# Exit: 0 if all browser checks pass, 1 otherwise.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+PLAYWRIGHT_IMAGE="mcr.microsoft.com/playwright:v1.52.0-noble"
+NETWORK_MODE="${PLAYWRIGHT_NETWORK:-host}"
+
+log() { echo "[browser-tests] $*"; }
+
+if ! docker info >/dev/null 2>&1; then
+    echo "[ERROR] Docker is not running" >&2
+    exit 1
+fi
+
+log "Ensuring Playwright image is present..."
+docker image inspect "$PLAYWRIGHT_IMAGE" >/dev/null 2>&1 || docker pull "$PLAYWRIGHT_IMAGE"
+
+log "Installing @playwright/test and running spec inside $PLAYWRIGHT_IMAGE..."
+# Mount the e2e sources read-only; copy them into a container-local work dir so
+# npm install never writes root-owned files to the host.
+docker run --rm \
+    ${NETWORK_MODE:+--network "$NETWORK_MODE"} \
+    -v "$SCRIPT_DIR":/src:ro \
+    --entrypoint sh \
+    "$PLAYWRIGHT_IMAGE" \
+    -c 'set -e; cp -r /src/. /work; cd /work; npm install --no-audit --no-fund; npx playwright test'
+
+log "Browser tests complete."