🎀[Style] Sprint 10 UX Consistency and Polish

[maruson08]

Summary

• Consolidate shared file input, source, queue, form, action, progress, status, and output styles
• Align concise empty states, queue grammar, disabled controls, feedback panels, and save/output areas
• Standardize footer navigation, brand-link naming, category-card rhythm, and Light/Dark preview treatment
• Preserve six-language wrapping and strengthen responsive architecture checks
• Add UX consistency regression coverage and a concise audit record

Scope

No new user-facing tools or PDF processing features. PDF algorithms, output contents, limits, dependencies, CSP, save fallbacks, and privacy architecture are unchanged.

Privacy

• Local-only processing unchanged
• Strict CSP preserved
• No analytics or tracking
• No runtime external UI or translation dependencies

Validation

• git diff --check origin/main...HEAD
• node tests/run-all.mjs
• JavaScript syntax and all existing PDF functional regressions
• Six-language catalog, detection, dynamic-state, and layout checks
• Route/resource, CSP/security, privacy/network, and CI contract checks
• New file-input, hidden-state, privacy-note, primary-action, status/output, footer/header, responsive, theme, and accessibility checks
• Browser automation attempted twice but blocked before page inspection by the known Windows sandbox ACL failure; visual browser QA is not claimed and remains required before v1.0.0 release approval