Rename medcenter landings and add the revenue calculator

Rename the two medcenter landings to their audience names:
medcenter -> medcenterphysio, medcenterpersonal -> medcenterstart.

Alongside the rename:
- add a RevenueCalculator section to both landings;
- rework the copy and figures in src/data/content.ts;
- simplify the lead form: drop the "cabinet_state" and "profile"
  selects (along with SelectField and the matching fields in
  shared/lead.ts, lead-mapper.ts and amo-check.ts) and make
  company and email optional;
- add the legacy/new static prototypes for both landings;
- add pnpm-lock.yaml to medcenterstart (package-lock.json is still
  there too).

deploy/apps.conf and deploy/README.md still refer to the old
directory names and need a follow-up.

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

medcenterstart/shared/lead.ts

@@ -0,0 +1,43 @@
+import { z } from 'zod'
+
+/** Which form on the page produced the lead. Surfaces as an amoCRM tag. */
+export const leadFormIds = ['request'] as const
+export type LeadFormId = (typeof leadFormIds)[number]
+
+export const utmKeys = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_content', 'utm_term'] as const
+
+const optionalText = (max: number) =>
+  z
+    .string()
+    .trim()
+    .max(max)
+    .optional()
+    .transform((v) => (v ? v : undefined))
+
+export const leadSchema = z.object({
+  form: z.enum(leadFormIds),
+  name: z.string().trim().min(1, 'Укажите имя').max(200),
+  phone: z.string().trim().min(5, 'Укажите телефон').max(50),
+  email: z
+    .union([z.email().max(200), z.literal('')])
+    .optional()
+    .transform((v) => (v ? v : undefined)),
+  company: optionalText(200),
+  /** «Основные направления центра» — one of the select's options, or free text. */
+  profile: optionalText(200),
+  comment: optionalText(4000),
+  page: optionalText(300),
+  referrer: optionalText(500),
+  // partialRecord, not record: z.record over an enum requires every key.
+  utm: z.partialRecord(z.enum(utmKeys), z.string().max(300)).optional(),
+  /** Honeypot. Bots fill it in; humans never see it. */
+  website: z.string().max(200).optional(),
+})
+
+export type LeadPayload = z.infer<typeof leadSchema>
+/** What the client sends — before zod's optional/empty-string normalisation. */
+export type LeadInput = z.input<typeof leadSchema>
+
+export type LeadResponse =
+  | { ok: true; leadId: number; contactId: number }
+  | { ok: false; error: string; fields?: Record<string, string> }