[rpgmem]

Closes #2052.

Problem

The "Test my device" mode (#2047) said "Ordinary browser (computer)" for every browser that was not an app's own. Support could not tell an out-of-date browser, or a Chromium derivative, from a current Chrome without reading the raw user agent.

Change

assets/js/ffc-device-check.js gets browserName(), which reads two sources in order.

• Chromium brands first. It reads navigator.userAgentData.brands and, through getHighEntropyValues(['fullVersionList']), the full versions. Brands win in this order: Brave, Edge, Opera, Samsung Internet, Chrome; a list with only Chromium is Chromium.
• The user agent as the fallback. This covers Firefox, Safari, every iOS browser (CriOS, FxiOS, EdgiOS, all WebKit), a Chromium build that declares no brands, and a page without HTTPS.

Examples of what it shows:

Browser	Shown
Chrome	Chrome (v. 129.0.6668.81)
Chromium	Chromium (v. …)
Brave	Brave / Chromium (v. …)
Edge	Edge / Chromium (v. …)
Opera	Opera 103 / Chromium (v. 117.0.5938.60)
Samsung Internet	Samsung Internet 26 / Chromium (v. …)
Firefox	Firefox (v. 131)
Safari	Safari (v. 17.6)
Chrome on iOS	Chrome / WebKit (v. 129.0.6668.69)

• A reduced user agent's padding is trimmed, so 129.0.0.0 reads 129.
• The row reads <name> — <device> through a new translatable browserNamed string. An unknown browser keeps "Ordinary browser (…)".
• An app's own browser names the app: Instagram, Facebook, WhatsApp, TikTok, LinkedIn, LINE.
• It stays out of FFC.Platform, whose rule is capabilities and contexts, never brands: no decision reads the name.
• PDF row: "Supported" now says what was checked, "Supported: this browser can build and save the PDF." A "(JS on)" note would be redundant: without JavaScript no row is filled and the page shows its JavaScript-off notice instead.
• Documentation (Certificates & Forms topic), catalogues, CHANGELOG (Added).

Tests

• New device-check-browser.test.js (18 tests):
  • Chrome, Chromium and Brave, whose user agents are the same, told apart by their brands;
  • Edge, Opera and Samsung Internet with the engine version, plus their own number;
  • the fallback to the major version when fullVersionList is refused or empty;
  • a 12-entry user-agent corpus with no brands (desktop, Android, iOS, Linux Chromium, unknown);
  • the row text, the generic wording, and the app name.
• device-check.test.js still passes (9 tests).
• PHP translation, comment-language, documentation and device-check tests pass (69 tests). ESLint and PHPCS are clean. The full suites run in CI.

Risk

• Display only, on the device test page. Vivaldi and other derivatives that declare only Chromium show as Chromium.

Checklist

• Base is develop; no version bump
• CHANGELOG.md: one bullet under [Unreleased] → Added, citing Device test: name the browser and its version instead of "Ordinary browser" #2052
• Documentation topic updated
• Strings in the .pot and .po, catalogues recompiled
• Minified assets rebuilt

Waits as a draft until #2051 merges (one PR armed at a time).

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Generated by Claude Code