leads: new phone number and an amoCRM lead on every call-button click

The published number becomes +7 927 789-60-71 across all four landings —
`contacts` in each `src/data/content.ts`, plus the fallback messages in the
lead endpoints and `src/lib/lead.ts` that spell it out when amoCRM is down.
The `legacy/` reference pages keep the old number: they are the visual
originals, not something that ships.

Tapping the phone button now also creates a lead. It cannot reuse the form
path: a click carries no name and no number, so `callClickSchema` in
`shared/lead.ts` validates the tracking data alone, `LeadService.submitCallClick`
creates a contactless lead tagged `клик по телефону`, and `AmoClient.createLead`
takes an optional `contactId` for it. The mapper's field/note split moved into
`collect()` so both lead kinds share it.

The browser fires this with `sendBeacon` (falling back to `fetch keepalive`),
because the same click hands the page to `tel:` and a plain fetch would be
cut off mid-flight. Duplicates are held down from both ends: one lead per
browser session on the client, four per IP per 30 minutes on the server.

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

hotel/server/src/lead-service.ts

@@ -1,6 +1,13 @@
-import type { LeadPayload } from '../../shared/lead.ts'
+import type { CallClickPayload, LeadPayload } from '../../shared/lead.ts'
 import { AmoClient, type AmoContact, type AmoFieldEntry } from './amocrm.ts'
-import { buildLeadName, mapLead, resolveLeadFieldMap, type LeadFieldMap } from './lead-mapper.ts'
+import {
+  buildCallClickName,
+  buildLeadName,
+  mapCallClick,
+  mapLead,
+  resolveLeadFieldMap,
+  type LeadFieldMap,
+} from './lead-mapper.ts'
 
 const digitsOnly = (value: string) => value.replace(/\D/g, '')
 
@@ -121,4 +128,29 @@ export class LeadService {
 
     return { leadId: lead.id, contactId, contactCreated }
   }
+
+  /**
+   * A visitor tapped the phone button. There is no contact to reuse or create —
+   * only the click itself — so the lead stands alone, and its tag and note are
+   * what tell a manager to expect an incoming call from this landing.
+   */
+  async submitCallClick(payload: CallClickPayload): Promise<{ leadId: number }> {
+    const fieldMap = await this.getFieldMap()
+    const { fields, note } = mapCallClick(payload, fieldMap)
+
+    const lead = await this.amo.createLead({
+      name: buildCallClickName(),
+      fields,
+      tags: ['клик по телефону'],
+    })
+
+    // As above: a failed note must not fail the lead.
+    if (note) {
+      await this.amo.addLeadNote(lead.id, note).catch((error: unknown) => {
+        console.warn('[amo] lead %d created but the note failed:', lead.id, error)
+      })
+    }
+
+    return { leadId: lead.id }
+  }
 }