feat(admin): add Italian (it) locale

[micio86dev]

What does this PR do?

Adds Italian (it) as a supported admin UI language.

• Registers it (Italiano) in packages/admin/src/locales/locales.ts, in alphabetical position between Indonesian and Japanese, with enabled: true.
• Adds a fully translated catalog at packages/admin/src/locales/it/messages.po — all 1932 strings translated (0 empty msgstr).

Translation notes:

• A shared glossary was used for term consistency (Collezione, Campo, Bozza, Pubblica/Pubblicato, Firma for "byline", Impostazioni, etc.).
• Established technical terms and brand/format names are kept as-is per Italian software convention (slug, tag, plugin, widget, media, dashboard, SQL/JSON/HTML, GitHub, etc.).
• ICU plural branches use Italian one/other with correct gender/number agreement; #, {placeholders}, <0>…</0> inline tags and escapes are preserved verbatim.

No linked issue — per CONTRIBUTING.md, translations are opened directly.

Type of change

• Bug fix
• Feature (requires maintainer-approved Discussion)
• Refactor (no behavior change)
• Translation
• Documentation
• Performance improvement
• Tests
• Chore (dependencies, CI, tooling)

Checklist

• I have read CONTRIBUTING.md
• pnpm typecheck passes
• pnpm lint passes
• pnpm test passes (or targeted tests for my change)
• pnpm format has been run
• I have added/updated tests for my changes (if applicable) — n/a, this is catalog data; the existing loadMessages test already covers every enabled locale
• User-visible strings in the admin UI are wrapped for translation (if applicable) — n/a, no source strings changed; this only adds a locale catalog, which is exactly what a translation PR should include
• I have added a changeset
• New features link to an approved Discussion — n/a (translation)

Note on the unchecked build boxes: I was unable to run pnpm typecheck / pnpm lint / pnpm test / pnpm format locally — pnpm install fails on my machine with filesystem errors (ERR_PNPM_EINVAL / EILSEQ / ENOENT) while writing the store on this volume, so the workspace never links. I did validate the catalog offline instead: 1932/1932 entries parse with valid gettext escaping, 0 unbalanced braces, ICU plural shape matches the English source for every plural entry, and {placeholder}/tag parity holds against en/messages.po. The locales.ts change is a single line matching the 20+ sibling entries. Please let CI run the authoritative checks.

AI-generated code disclosure

• This PR includes AI-generated code — model/tool: Claude Opus 4.8 (translation of the catalog and the locale registration)

Screenshots / test output

Offline catalog validation:

enEntries: 1932
itEntries: 1932
emptyMsgstr: 0
ICU/brace issues: 0
placeholder-parity problems: 0 (real)

[changeset-bot]

🦋 Changeset detected

Latest commit: 0b9a5ba

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 17 packages

Name	Type
@emdash-cms/admin	Minor
emdash	Minor
@emdash-cms/cloudflare	Minor
@emdash-cms/sandbox-workerd	Patch
@emdash-cms/plugin-mcp-smoke	Major
@emdash-cms/fixture-perf-site	Patch
@emdash-cms/perf-demo-site	Patch
@emdash-cms/cache-demo-site	Patch
@emdash-cms/do-demo-site	Patch
@emdash-cms/do-solo-demo-site	Patch
@emdash-cms/auth	Minor
@emdash-cms/blocks	Minor
@emdash-cms/gutenberg-to-portable-text	Minor
@emdash-cms/x402	Minor
create-emdash	Minor
@emdash-cms/auth-atproto	Patch
@emdash-cms/plugin-embeds	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Scope check

This PR changes 8,825 lines across 3 files. Large PRs are harder to review and more likely to be closed without review.

If this scope is intentional, no action needed. A maintainer will review it. If not, please consider splitting this into smaller PRs.

See CONTRIBUTING.md for contribution guidelines.

[github-actions]

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[emdashbot]

This is the right change at the right scope: it adds a fully translated Italian admin catalog and enables it in the canonical locale list. There is no architectural, security, or logged-out query-count concern, and the change is additive.

I checked:

• packages/admin/src/locales/locales.ts — it (Italiano) is inserted alphabetically between id and ja, with enabled: true and default LTR direction (correct).
• .changeset/italian-locale.md — a minor changeset for @emdash-cms/admin, led with a present-tense verb, describing the user-facing effect.
• packages/admin/src/locales/it/messages.po — 1932/1932 entries match the English msgid set exactly, zero empty msgstr, plural branch shapes (one/other) and # placeholders are preserved, and inline <0> tags are intact. The existing loadMessages loop over SUPPORTED_LOCALES will exercise the new locale once catalogs are compiled (pnpm locale:compile).
• lingui.config.ts and lunaria.config.ts pick up it automatically via LOCALE_CODES/TARGET_LOCALES, and copy-locales.js copies the compiled it/messages.mjs without any hardcoded list.

The only issue is a data-quality nit in the PO header. Italian has plural messages, so the catalog should declare the Italian plural formula instead of leaving Plural-Forms blank.

[emdashbot]

[suggestion] The Italian catalog header leaves Plural-Forms empty ("Plural-Forms: \n"). Lingui will infer the one/other rule from the it locale code at compile time, but a complete gettext catalog should declare the plural formula so other PO tooling doesn't have to guess. Sibling catalogs such as de and es-ES already set nplurals=2; plural=(n != 1);, which is exactly the correct formula for Italian.

Suggested change

	"Plural-Forms: \n"
	"Plural-Forms: nplurals=2; plural=(n != 1);\n"

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commit: 0b9a5ba