feat(chat): show Crisp's launcher on every page

[datlechin]

Why

The chat launcher appeared only after a reader clicked "Live chat" in the footer or on the FAQ. The owner wants it on every page.

Change

• lib/crisp.ts (shared): loadChatWhenIdle() adds Crisp's loader once the load event has fired and the browser is idle (requestIdleCallback, or 2 s on Safari). It is never in the server render and never competes with the first paint. openChat() opens the same widget, loading it first if a reader clicks early. Crisp is still given only the page's language.
• The landing layout calls useLiveChat(), so every public page carries the launcher. The footer and FAQ "Live chat" buttons now open it.
• Consent bar: on a phone the bar spans the width, so the launcher would cover its Decline button. While the bar reaches the bottom-right corner the launcher is hidden (chat:hide), and it comes back when the bar closes (chat:show). A chat the reader opened is never hidden. The bar carries data-consent-bar for this. On desktop the bar sits bottom-left and the launcher is untouched.
• Privacy policy (EN and VI), updated 2026-10-05: Crisp loads on every page of the site and the account portal and sets its crisp-client/ cookies there. It receives the IP, browser details, the pages viewed and messages. The cookies' lawful basis is legitimate interest; conversations a reader starts stay under consent. The processors list and the summary are updated to match.
• docs/architecture.md, docs/shared-files.md (new hashes), the Blade comment and test comments now describe the new behaviour.

Merge with TableProApp/license (same shared files).

Tests

• tests/js/crisp.test.ts (10 cases):
  • nothing is loaded before load plus idle, and the loader is added once;
  • a load is cancelled when the reader leaves the page first;
  • nothing loads without a website ID;
  • the button opens the chat;
  • the launcher hides and returns around a full-width consent bar, and is untouched by a desktop bar or an open chat;
  • Crisp receives the language only.
• ScriptsTest: openChat() is called only from click handlers and loadChatWhenIdle() only in an effect. No document carries a third-party script.
• Full suite with SSR: 1425 passed, 1 skipped. npm run test:js: 181/181. Typecheck, build and Pint pass.
• Headless Chrome against a local build with SSR, with Crisp's script blocked so its command queue stays readable:
  • no Crisp in the server HTML or at DOMContentLoaded;
  • the loader arrives after load plus idle, in en on / and vi on /vi/pricing;
  • at 390px with the consent bar open, the queue is chat:hide, and after answering it is chat:hide, chat:show;
  • no console errors.