feat: prepare site for Yandex Ads (RSYA) moderation

- Add About page (/about, /ru/about) with mission, history, contacts
- Add FaqBlock component for generator FAQ sections
- Add FAQ to all 10 generators (3 Q&A each, EN+RU)
- Expand howTo/whenTo content on numbers, password, coin generators
- Add About link to LanguageSwitcher navigation
- Improve Yandex RTB ad block: min-height placeholder, no layout shift
- Extend generator schema with optional faq/ruFaq fields
- Update translations.ts with about and faq i18n keys

src/components/FaqBlock.astro

@@ -0,0 +1,33 @@
+---
+import { useT } from "../i18n/translations";
+import type { Lang } from "../i18n/translations";
+
+interface Props {
+  questions: Array<{ q: string; a: string }>;
+  lang?: Lang;
+}
+
+const { questions, lang = "en" } = Astro.props;
+const T = useT(lang);
+---
+
+<section class="mt-4">
+  <div class="rounded-xl bg-zinc-900/50 border border-zinc-800/60 p-5">
+    <h2
+      class="flex items-center gap-2 text-xs font-semibold uppercase tracking-widest text-zinc-400 mb-3"
+    >
+      <span class="w-1.5 h-1.5 rounded-full bg-accent" aria-hidden="true"></span>
+      {T.faq}
+    </h2>
+    <div class="space-y-3">
+      {
+        questions.map(({ q, a }) => (
+          <div>
+            <p class="font-medium text-zinc-300 text-sm">{q}</p>
+            <p class="text-zinc-400 text-sm mt-0.5">{a}</p>
+          </div>
+        ))
+      }
+    </div>
+  </div>
+</section>

src/components/LanguageSwitcher.astro

@@ -25,6 +25,13 @@ const alternatePath = isRu
     data-target-lang="ru"
     data-alternate={isRu ? "" : alternatePath}>RU</a
   >
+  <span class="w-px h-3 bg-zinc-700 mx-0.5" aria-hidden="true"></span>
+  <a
+    href={isRu ? "/ru/about/" : "/about/"}
+    class="px-2 py-1 rounded-md transition-colors text-zinc-400 hover:text-zinc-200"
+  >
+    {isRu ? "О проекте" : "About"}
+  </a>
 </div>
 
 <script>

src/components/YandexRTB.astro

@@ -1,10 +1,17 @@
 <!-- Yandex.RTB R-A-19259130-1 -->
-<div id="yandex_rtb_R-A-19259130-1"></div>
+<div
+  id="yandex_rtb_R-A-19259130-1"
+  class="min-h-[90px] w-full flex items-center justify-center rounded-lg bg-zinc-900/30"
+>
+  <span class="text-xs text-zinc-600 uppercase tracking-widest select-none"
+    >Advertisement</span
+  >
+</div>
 <script>
   window.yaContextCb.push(() => {
     Ya.Context.AdvManager.render({
       blockId: "R-A-19259130-1",
-      renderTo: "yandex_rtb_R-A-19259130-1"
-    })
-  })
+      renderTo: "yandex_rtb_R-A-19259130-1",
+    });
+  });
 </script>