fix(i18n): revert protected-term/code-field mistranslations + Check 7 gate

[heznpc]

A repo-wide value == key audit across all 22 dict sections (extending the catalog-only Check 6) surfaced 53 "mixed" entries — translated in some locales, left English in others. An adversarial localization triage (9 agents, per-entry, with full cross-locale data) classified them.

Result

Bucket	Count	Action
Coincidental-correct	39	None — e.g. French "minutes"=="minutes", Italian "quiz" loanword, "Video"/"Reset" cognates. Confirms Check 6 must stay catalog-scoped — broadening it would false-positive on these.
Objective inconsistency	7	Fixed (below).
Judgment calls	~6	Deferred to native review (below).

The 7 objective fixes — a dict translating a term it must keep English

• it → common.{name, description, trigger}: these are SKILL.md frontmatter field names (code identifiers). 11 locales keep them English; it alone translated them (nome / descrizione / attivazione) — copying those into real frontmatter breaks the user's YAML.
• ko → ui."Anthropic Academy": a brand name in ko's own _protected map, shipped as "Anthropic 아카데미".
• ja / zh-CN / zh-TW → claudePlatform."Skills": the Claude Skills platform feature is registered in each of those locales' _protected maps, yet was translated (スキル / 技能).

New gate — Check 7

check-dict-coverage.js (already CI-gated) now fails if a term registered in a dict's own _protected map is translated where that term is a section key. Per-locale, so it's false-positive-free — a term protected in ja isn't checked in de. Two test cases added (catches the violation; does not flag per-locale-unprotected translations).

Deferred to native review (not authored unilaterally)

These are genuine localization judgment calls where the source framework itself is inconsistent across locales, so forcing a value risks introducing an error:

• aiFluency.Diligence / ko — the 4D competency is rendered differently across locales (ja 検証, ru Добросовестность, de Sorgfalt…); ko left English. Needs a native-chosen term.
• claudeAPI."Vision API" / id,it; mcpIntro."Python SDK"/"TypeScript SDK"/"MCP Inspector" / it — Italian word-order variants, not clearly wrong.
• common."Personal"/"Project" / id,it — settings-scope words, not in _protected, so ambiguous.
• claudePlatform."Skills" / de,es,fr,ru — translated, but "Skills" is not protected in those locales, so possibly intentional.
• claude101."Curriculum" / it — CV-vs-syllabus connotation.

Validation

All gates green incl. check:plugin (regenerated terms.it.json) · 561 unit · e2e green (one pdf-export popup-event flake retried clean — unrelated to dict data).