Redesign the registry as a living terminal index

[HANCORE-linux]

Summary

Redesign the Omarchy Plugin Registry as a responsive, terminal-native “living registry” while preserving Rails-native navigation and progressive enhancement.

• make server-rendered search authoritative, with Fish-style completion, URL/history restoration, stable nine-card Browse pagination, and keyboard navigation
• add a fixed Most Wanted 1+4 module and a separate right-moving Recently Added stream
• add canonical plugin-link copying, detail overlays, provenance, and viewport-fixed feedback
• project Omarchy System and manual themes through exact ANSI slots, with bounded local synchronization and navigation-safe persistence
• redesign authenticated Account, Governance, Publishing, Audit, publisher, and plugin-detail surfaces in the same terminal system
• add the staged Tree Build Hero, responsive whole-pixel Omarchy wordmark, install-command ticker, and theme-native shadows
• add a four-destination mobile navigation and compact mobile layouts without the Hero ticker or Pacman details

Search and discovery behavior

• Search remains server-authoritative and works as a native GET form without JavaScript.
• With focus in Search, the first Enter accepts an available completion; the next Enter presents and scrolls to Browse results without opening a plugin. Outside Search, Enter opens the selected Browse card.
• Browse always renders nine slots and uses normal pagination; there is no Browse All mode.
• With JavaScript enhancement, plugin names copy canonical URLs; without JavaScript they remain ordinary detail links, while the rest of each discovery card opens details.

Accessibility and resilience

• preserve semantic links, forms, native selects, visible focus, no-JavaScript navigation, and 44px mobile targets
• keep theme, search, selection, and section state correct across Turbo navigation, history traversal, BFCache restoration, and viewport changes
• run the desktop install ticker continuously without a visible dedicated toggle; pause it on pointer hover or keyboard focus, render it static for Reduced Motion, and omit it on compact mobile
• keep animated transforms and clipping off shadow-owning surfaces so elevation survives animation and navigation
• run CI system tests sequentially with PARALLEL_WORKERS=1

Security

• keep Omarchy theme synchronization local-only, bounded, allowlisted, and fail-closed
• never execute theme or plugin repository code
• use complete SQL literals for JSON taxonomy suggestion identifiers while keeping user search values bound and escaped
• retain bounded preview, manifest, and search payload handling

Verification

• bin/rails db:test:prepare test — 354 runs in parallel, 1,881 assertions, 0 failures
• PARALLEL_WORKERS=1 bin/rails test:system — 111 runs, 1,561 assertions, 0 failures
• bin/rubocop — 214 files, 0 offenses
• bin/brakeman --no-pager — 0 warnings, exit 0
• bin/bundler-audit — no vulnerabilities
• bin/importmap audit — no vulnerable packages
• JavaScript syntax checks — passed
• git diff --check — passed