Convert medical-centre landing to React + Tailwind v4 with amoCRM lead capture

Ports the single-file MedCsFiz page — the medical centre that already runs
physiotherapy and wants the existing room to earn more — to the same
architecture as the fitness and hotel landings: Vite + React 19 + TypeScript +
Tailwind v4 on the client, Express 5 for the API, zod schema shared between the
two.

The original stays in legacy/index.html as the visual reference. Its 4 MB of
inlined CSS, JS and base64 images become 12 asset files (664 KB) plus a bundle
loaded on demand; the two 1.5 MB / 750 KB device PNGs are recompressed to webp.
The page is split into 18 components with all copy moved to src/data/content.ts.

Leads reuse the fitness amoCRM integration: contact lookup by phone in every
Russian spelling, deal in the first stage of pipeline 10980758, account fields
matched automatically with the rest written to a note. Rate limit, honeypot and
a localStorage fallback so a lead survives the CRM being down. Endpoint is
/api/leads/medical-centers-existing-physio; Vite runs on 5173 and the API on
3000.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

medcenter/.env.example

@@ -0,0 +1,34 @@
+# ---------------------------------------------------------------------------
+# Public (baked into the client bundle at build time — never put secrets here)
+# ---------------------------------------------------------------------------
+VITE_SITE_URL=https://exodevices.ru/medical-centers/with-physiotherapy
+
+# Sub-path the site is served from, if any. Leave as "/" when it sits at the
+# domain root; set to "/medical-centers/with-physiotherapy/" when it is mounted
+# under that path.
+VITE_BASE_PATH=/
+
+# ---------------------------------------------------------------------------
+# Server
+# ---------------------------------------------------------------------------
+PORT=3000
+
+# ---------------------------------------------------------------------------
+# amoCRM — server-side only, never exposed to the browser
+# ---------------------------------------------------------------------------
+# Your account subdomain: for https://exotherapy.amocrm.ru put "exotherapy"
+AMO_SUBDOMAIN=
+
+# Long-lived access token.
+# amoCRM → Настройки → Интеграции → Создать интеграцию → Внешняя интеграция →
+# open it → tab "Ключи и скопы" → «Генерировать токен» (долгосрочный, ~1 год).
+AMO_LONG_LIVED_TOKEN=
+
+# Pipeline (воронка) the leads land in. The lead is placed in its first stage.
+AMO_PIPELINE_ID=10980758
+
+# Optional: numeric id of the amoCRM user leads are assigned to.
+AMO_RESPONSIBLE_USER_ID=
+
+# Optional: comma-separated tags added to every lead.
+AMO_LEAD_TAGS=medcenter-landing