fix(i18n): dopisek roboczy na /platforma EN + known issues w README

workingName: "before launch" -> "before publication", zgodnie z ustaleniem.

README dostaje sekcję Known issues z odłożoną świadomie sprawą: og:* w
surowym HTML zostaje po polsku na trasach /en, bo index.html jest jednym
statycznym dokumentem dla każdej ścieżki. Scrapery Open Graph nie wykonują
JS, więc runtime'owa podmiana title/description ich nie dotyczy. Ten sam
rdzeń problemu dotyczy hreflang, który jest identyczny na każdej podstronie.
Fix dla obu to prerendering index.html per język.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -43,3 +43,19 @@ SMTP_PASS=your-app-password
 | scheme | `http` |
 | forward hostname | `humanai-mailer` |
 | port | `3000` |
+
+## Known issues
+
+**Open Graph metadata is Polish on `/en` routes.** `index.html` is a single static
+document served for every path (`try_files … /index.html`), so `og:title`,
+`og:description` and `og:url` are baked in Polish. `App.tsx` rewrites
+`document.title` and `meta[name="description"]` at runtime, which browsers and
+JS-executing crawlers honour — but Open Graph scrapers (Facebook, LinkedIn,
+Slack) read the raw HTML and will show Polish copy when an `/en` link is shared.
+
+**`hreflang` alternates are the same on every page.** All routes advertise the
+same `pl` / `en` / `x-default` triple pointing at the two homepages, so
+`/privacy` claims the homepage as its alternate.
+
+Both have one root cause and one fix: prerender a per-language `index.html`
+instead of serving one document for every route.

src/i18n/en.ts

@@ -168,7 +168,7 @@ export const en: typeof pl = {
   },
   platform: {
     title: 'Overseeing agentic systems',
-    workingName: '(working name — to be confirmed before launch)',
+    workingName: '(working name — to be confirmed before publication)',
     watchers: {
       title: 'Who watches the agents that watch everything else?',
       paragraphs: [