[SandObserver]

Summary

• Point 20 hardcoded literals at the catalogue key that already carried the same English, rather than adding duplicates.
• Drop the hardcoded aria-label from every inline-edit pencil and name the button in initInlineEdit from its row's .rl label, via a new common.editNamed message; this covers all 25 inline-edit rows and removes 14 separate strings.
• Add 24 keys across common, app, folder, appearance, widgetCfg, nav, general, dashboard and about, translated into all six locales, for the labels and names that had no equivalent.
• Replace the hardcoded row labels in the iframe widget form and the colour control with t() calls, so the pencil names derived from them are translated too.
• Add data-i18n-title to translateDOM, alongside the existing text, html, placeholder and aria-label attributes.
• Set the Settings document title from nav.pageTitle after initI18n.
• Add hardcoded-strings.test.mjs, which fails on an aria-label, placeholder, title or row label holding a literal instead of a key, with a narrow allowlist for example values, brands and bare technical tokens.
• Relax landmarks.test.mjs to match attributes rather than exact attribute order, matching the pattern the dashboard landmark test already uses.

Testing
All green: 1083 frontend tests, 1334 backend tests at 94.35% lines, lint, format, both typechecks, the cache-busting check, the admin ES-module syntax check, and the Docker build. Added 2 tests, the scan verified to fail by introducing a literal aria-label before reverting.

Checklist

• Stays within the project constraints: one container, no runtime dependencies, no build step (see CONTRIBUTING.md).
• Tests added or updated for new logic, and the full suite, lint, and typechecks pass.
• Docs updated if behavior or configuration changed.
• CHANGELOG.md updated under Unreleased if the change is user-visible.