chore: revert frontend UI changes to 7aa0d90 to fix layout blowout

Fix renderer.js null safety, rename duplicate walkTextNodes in format.js to avoid conflict

fix: quran text excluded from analysis models + styled ref + score preserved

feat: apply includes surah ref + quran-applied span protects from analysis models

feat: Pipeline Hardening v3.3 — stage ownership, punctuation safety, UUID migration

feat: Rich text formatting toolbar + formatting-preserving renderer - Bold, Italic, Underline, Strikethrough, Alignment, Undo/Redo - Font family and font size dropdowns - New DOM-level overlay renderer (preserves formatting during analysis) - Apply/dismiss corrections keep original formatting

added light theme and ISLAMIC RAG and fixed the UI/UX issues and added the auth