chore(i18n): extend parity gate to all locales with strict/info tiers
Previously the script only inspected en/zh-CN/zh-TW, leaving de/fr/it/ja/pt-BR
drift invisible. Now locales are auto-discovered from src/i18n/locales/, and a
STRICT list (de, zh-CN, zh-TW — currently in parity) gates CI while the rest
report informationally until their drift is caught up. ja notably has 27 real
placeholder bugs worth fixing before promotion to strict.
Search field at the top of Settings now finds Sidebar Links,
Spoolman, Spool/Color Catalog, all four Failure Detection
sections, Email auth (Advanced + SMTP test), 2FA (TOTP, Email
OTP, Linked Accounts), SSO/OIDC, LDAP Server Config, and the
four Backup sub-cards (GitHub, History, Local, Scheduled).
Replaces the hardcoded searchIndex array in SettingsPage.tsx
with a module-level registry (frontend/src/lib/settingsSearch.ts).
Each settings card calls registerSettingsSearch(...) at module
scope, so adding a new card means adding one colocated line
instead of editing a distant central array. Anchor ids were
added to the corresponding Card elements in the affected
components so scrollIntoView lands on the right section.
Sn0rrii