feat: replace UI mockups with real netOrk screenshots

The homepage showed seven hand-built JSX imitations of the netOrk UI. They
are gone; every image is now a screenshot of netOrk v0.28.0 itself, taken
from an anonymized copy of a production database (scripts/demo) with
scripts/screenshots/capture.py and published as WebP (~630 KB for all eight).

- Hero: the device inventory. Walkthrough: device detail, VLANs, the Security
  tab, the vulnerability triage queue (replacing the config-diff row), the
  dashboard and service checks (new row 6). NIS2: the audit log, filtered to
  what people did.
- Copy follows the images: row 3 describes the security assessment, row 4 the
  triage queue; row 2 no longer claims corrections are always automatic;
  18 widgets. Alt texts in both languages.
- Also fixed on the homepage: the NIS2 teaser for Art. 21 (2e) and the
  container list of a deployment (three worker pools, plus Flower, registry,
  APT cache and the Signal gateway).
- Demo tooling hardened on the real dump: secrets inside JSON (Wi-Fi keys),
  reverse DNS zones, glued identifiers, tens of thousands of CrowdSec
  addresses, a schema newer than the release (anonymize, then downgrade),
  MFA-enforcing roles, and click steps for view filters.
- DESIGN.md: real screenshots only. PAGES.md: the six rows as they are.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/screenshots/capture.py

@@ -17,6 +17,7 @@ taking screenshots cannot change anything on the instance.
 """
 
 import argparse
+import io
 import json
 import os
 import re
@@ -26,6 +27,7 @@ import urllib.parse
 import urllib.request
 from pathlib import Path
 
+from PIL import Image
 from playwright.sync_api import Page, sync_playwright
 
 from shots import SHOTS
@@ -80,7 +82,10 @@ def token() -> str:
         body = urllib.parse.urlencode({"username": USER, "password": PASSWORD}).encode()
         try:
             with urllib.request.urlopen(f"{BASE}/api/v1/auth/token", body) as res:
-                return json.load(res)["access_token"]
+                tok = json.load(res).get("access_token")
+            if not tok:
+                sys.exit(f"Login as {USER} needs MFA; the demo copy should have none (anonymize.py)")
+            return tok
         except urllib.error.URLError as e:
             sys.exit(f"Login as {USER} at {BASE} failed: {e} (is scripts/demo/up.sh start running?)")
     state = json.loads(STATE.read_text())
@@ -118,6 +123,15 @@ def settle(page: Page) -> None:
     page.wait_for_timeout(800)
 
 
+def publish(png: bytes, path: Path, width: int) -> None:
+    """Scale the 2x capture down to its published width and store it as WebP."""
+    img = Image.open(io.BytesIO(png)).convert("RGB")
+    if img.width > width:
+        img = img.resize((width, round(img.height * width / img.width)), Image.LANCZOS)
+    img.save(path, "WEBP", quality=85, method=6)
+    print(f"  -> {path.name} {img.width}x{img.height}, {path.stat().st_size // 1024} KB")
+
+
 def capture(variables: dict[str, str], only: set[str], mask: bool) -> None:
     OUT.mkdir(parents=True, exist_ok=True)
     terms = mask_terms()
@@ -160,6 +174,9 @@ def capture(variables: dict[str, str], only: set[str], mask: bool) -> None:
             if got_it.is_visible():
                 got_it.click()
                 page.wait_for_timeout(300)
+            for sel in shot.clicks:
+                page.locator(sel).first.click()
+                settle(page)
             masks = [page.locator(s) for s in shot.mask]
             if mask:
                 masks += [page.get_by_text(PUBLIC_IPV4), page.get_by_text(EMAIL)]
@@ -167,8 +184,9 @@ def capture(variables: dict[str, str], only: set[str], mask: bool) -> None:
             clip = None
             if shot.height:
                 clip = {"x": 0, "y": 0, "width": VIEWPORT["width"], "height": shot.height}
-            page.screenshot(path=OUT / f"{shot.name}.png", full_page=shot.full_page,
-                            clip=clip, mask=masks, mask_color="#334155", animations="disabled")
+            png = page.screenshot(full_page=shot.full_page, clip=clip, mask=masks,
+                                  mask_color="#334155", animations="disabled")
+            publish(png, OUT / f"{shot.name}.webp", shot.width)
         browser.close()
     if blocked:
         print("Blocked non-GET requests (nothing was sent):")