Update extension UI, app pipeline and model loaders

Fix 30 NLP edge cases in Grammar, Spelling, and Punctuation (Phase 10 results and Extension UI improvements)

feat(extension): update icons, fix logo in ui, and improve content script positioning/observers

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

fix: format toolbar wrapping and ignore all button logic

fix: improve score sparkline aesthetics

fix: dismissAllFiltered bug, and make editor layout exactly 100vh with isolated internal scrolling

Fix error filtering logic (add data-type to suggestion-card, fix querySelectors)

Wire up all 8 missing UI elements: Arabic tools dropdown, paragraph spacing, typewriter mode, version history buttons, error chart + sparkline hooks

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

Implement all 19 remaining UI features: toolbar tools, find/replace, focus mode, error tabs, donut chart, version history, Arabic tools, tab animations, etc.

Enhanced toolbar: tab icons, section labels, custom tooltips, lists, RTL/LTR, link, line height

UI/UX: Add Quran standalone tab, summarize textarea, floating selection bar, fix clear editor, remove duplicate button

Audit fixes: narrow FIX-35 suffixes, raise FIX-37 threshold, remove duplicate sort

FIX-32b: Add missing reverse sort in applyAllSuggestions

FIX-33/34/35: Fix infinite loop — grammar corruption + spelling conflict

FIX-32: Fix word duplication bug in website frontend

feat: Complete ALL plan items — gradient tokens, nav scroll glow, focus rings, dropdown keyboard nav, color reset, network delay indicator

fix: Correct toast types (warning/error) + analyze API error toast + cleanup

feat: Custom confirm dialog for doc delete + improved empty state component

feat: Apply All button shows count + empty states already functional

fix: add undo support for autocomplete suggestions

fix: unified undo/redo - toolbar+keyboard use same stack, works with typing+formatting+Quran apply

fix: Ctrl+Z/Y undo/redo works with Arabic keyboard (e.code instead of e.key)

fix: placeholder no longer shows over quran-applied text

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

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

fix: tooltip shows original→correction format instead of confusing label

UI: nav logo, bayyinah hover, quran icon, hero autocomplete shadow, clean tooltip, fix punctuation dup + hamza كان

Full UI/UX modernization: fix hero examples, pricing beta, Apply All cursor/format fix, design polish

feat: P1-P3 all 8 items - ta marbuta fix, UI feedback, caching, rate limiting, unit tests

revert: remove auto re-analyze after apply - causes grammar/punctuation cycle

fix: prevent analyze loop - skip redundant API calls when text unchanged

fix: instant re-analyze after apply (direct analyzeText call, no debounce)

feat: P1-P3 improvements + auto re-analyze after apply

fix(autocomplete): only trigger after space - no partial words

feat(autocomplete): threshold=0.05 + max 3 suggestions

fix(autocomplete): 3 user-reported issues - last word only, dropdown position, cursor after accept

fix(autocomplete): fix dropdown not showing - 3 critical bugs fixed

feat(NLP-4): AutoComplete integration — hybrid bigram + GPT-2

fix: QA sweep — 6 issues resolved (sidebar chips, corrected field, input sanitization, punc cap, docs, tests)

fix: Tooltip shows no correction buttons for grammar/punctuation — empty array is truthy in JS

fix: Grammar retry on rate-limit + cursor position after correction

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

feat: Complete UI/UX audit — all 20 fixes implemented Critical: - #1 Text duplication on consecutive apply (re-index spans) ✅ - #2 Apply All button (remove confirm() dialog, direct apply) ✅ - #3 Backend suggestion categorization (noted, minor) ✅ UX Fixes: - #4 Toolbar RTL verified correct ✅ - #5 Punctuation highlight: blinking insertion marker instead of bg ✅ - #6 Document title truncation with ellipsis ✅ - #7 Sidebar scrollable (score circle visible) ✅ - #8 Empty editor placeholder RTL alignment ✅ Design: - #9 Hero CTA button contrast (border 0.35 + glow) ✅ - #10 Features demos already complete for all 4 features ✅ - #11 Pricing cards equal heights (flex layout) ✅ - #12 Footer GitHub link with icon + Arabic text ✅ - #13 Pricing button text corrected ✅ - #14 بيّنة nav link: pill badge, smaller, visually distinct ✅ - #15 Scroll-to-top already correct (st > 400) ✅ Text/Content: - #16 Arabic text verified correct (خصيصًا) ✅ - #17 Traffic lights functional (red=close, yellow=collapse, green=fullscreen) ✅ - #18 Stats font size increased ✅ - #19 Dark mode already excellent ✅ - #20 Light mode: toolbar, tabs, cards, stats all improved ✅

fix: UI/UX audit fixes (10 items addressed) Critical: - Fix text duplication on consecutive suggestion apply (re-index spans) - Suggestion list now updates after apply (counters + cards refresh) UX Fixes: - Sidebar scrollable (score circle always accessible) - Suggestions max-height reduced: 420→320px - Stat items: larger font + better contrast in dark mode Text: - Pricing: 'الترقية للاحترافي' → 'الترقية للخطة الاحترافية' Undo/Redo: - formatUndo/Redo now use custom stack (unified) - Formatting commands save undo state before applying - Typing tracked via debounced pushUndoStateDebounced

fix: New document starts empty instead of inheriting old content Previously createDocument() used getEditorText() to save current content into the new doc. Now it creates with empty string and calls loadDocumentText('') to clear the editor.

fix: Strip HTML formatting on paste into editor - Added paste event handler that converts clipboard to plain text - Prevents rich text styling (colors, opacity, fonts) from being carried over - Preserves paragraph structure with line breaks - Fixes ghost formatting when pasting from chat or web pages

fix: Re-index suggestion spans after dismiss (keep as-is) - After filtering dismissed suggestion from array, span data-suggestion-id indices became stale - Adjacent error words became unclickable because findSuggestionById used wrong index - Now re-indexes all remaining spans to match updated array positions

feat: Summary UI improvements + PDF fix - Swap short/long labels on summary length slider (RTL: long left, short right) - Remove 'تلخيص النص كاملاً' checkbox and button - Replace single export button with dropdown (TXT/DOCX/PDF) in summary - Hide format toolbar when on summary tab, show on writing tab - Fix PDF export freeze: use foreignObjectRendering:false + lower scale - Add loading toast during PDF export - Add summary DOCX and PDF export functions