Release v0.5.1 (#229) (#230)

* (SP: 1) [Security] Enforce origin posture for shop APIs (admin/checkout same-origin; internal/webhooks non-browser) + docs

* (SP: 1) [DB] Align stripe_events.order_id FK CASCADE across schema and migrations

* feat(i18n): localize quiz anti-cheat, header and blog filters (#175)

* feat(Blog): Adding last published post to the blog and category page, recommended posts, Changing styles to one unified format, Bug fixes

* Update leaderboard-style

* Update leaderboard-style

* teat(Blog): fix of hover on author, fix of the line

* (SP: 3) [Observability] Extend structured logging + correlation IDs across all shop routes; purge console.*; enforce explicit error codes

* (SP: 1) [Admin][Security] Add safe product delete (PRODUCT_IN_USE) + mobile cards UI; tighten env/docs, locale normalization, cache-control, and logging semantics

* fix: npm installing

* (SP: 1) [Admin] Align products list in use checks with DB column names (order_items/inventory_moves)

* fix:Update leaderboard: fixed background

* fix: remove email from CurrentUser type to prevent PII exposure

* refactor: align leaderboard UI with brand style (fixed bg, css vars, podium glow)

* (SP: 1) [Frontend] About Us Page. Fixed game, topics, mobile layout

- Fixed mobile tabs in FeaturesSection (icon-only on mobile)
- Fixed game bugs: collision detection, animation, scoring system
- Added multiple obstacle types with level progression
- Improved game sizing for mobile while preserving desktop
- Updated TopicsSection with local SVG icons and hover borders
- Made DynamicGridBackground static grid opt-in via showStaticGrid prop
- Limited SponsorsWall to display max 10 sponsors
- Optimized CommunitySection button layout for mobile

* refactor: update accent color hover effects to Footer

- Update Footer links to use --accent-primary on hover
- Update ThemeToggle icons to use --accent-primary on hover
- Both components adapt colors to light/dark theme

* refactor: improve accessibility

- Add focus-visible styles for keyboard navigation accessibility

* (SP: 1) [Shop] Fix Stripe checkout success redirect (remove duplicate locale /uk/uk) (#186)

* fix:leaderboard  update leaderboard-style

* fix:leaderboard  update leaderboard-style (#187)

* fix:leaderboard update leaderboard-style on mobile

* fix: resolve CodeRabbit issues and conflicts

* fix:leaderboard update leaderboard-style on mobile (#188)

* fix:leaderboard  update leaderboard-style

* fix:leaderboard update leaderboard-style on mobile

* fix: resolve CodeRabbit issues and conflicts

---------



* (SP: 1) [Frontend] Changing hero headline on shop main page (#190)

* (SP: 1) [Shop] Fix checkout redirect 404 by removing duplicate locale in in-app routes and Stripe return_url

* (SP: 1) [Shop] Fix locale cart page and orderid page

* (SP: 1) [Frontend] Changin hero headline on shop main page

* (SP: 1) [Frontend] Fix styles shop home page, buttons (#191)

* fix: move row border to first cell to resolve CodeRabbit issue

* fix: move row border to first cell to resolve CodeRabbit issue new

* Feature/leaderboard style update (#192)

* (SP: 7) [UI] Quiz UI polish: tabs styling, category accents, color scheme (#181, #193, #194) (#195)

* Sanity (#196)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* (SP: 3) [AI] Add AI word helper with Groq integration (#200)

* (SP: 3) [AI] Add AI word helper with Groq integration

- Implement Groq API with Llama 3.1 70B model
- Add text selection detection on Q&A page
- Create floating "Explain" button
- Build draggable modal with 3-language support (uk/en/pl)
- Add localStorage caching for instant repeated lookups
- Implement guest CTA (login/signup)
- Add rate limiting (10 requests/min)
- Auth-gated feature (registered users only)

Components:
- SelectableText: Detects text selection
- FloatingExplainButton: Appears on selection
- AIWordHelper: Main modal with explanations

* (SP: 1) i18n: fix Polish locale and set EN as default

* Sanity (#202)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* feat(Blog): Fix for  click-outside-to-close search, recommended posts are limited to 3

* feat(Blog): selectedAuthorData fixed

* feat(Blog): Added description for /blog/[slug] metadata, Added Schema.org JSON‑LD for Article (BlogPosting) and BreadcrumbList , Added <time datetime> tags where blog dates renders

* Sanity (#203)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* feat(Blog): Fix for  click-outside-to-close search, recommended posts are limited to 3

* feat(Blog): selectedAuthorData fixed

* feat(Blog): Added description for /blog/[slug] metadata, Added Schema.org JSON‑LD for Article (BlogPosting) and BreadcrumbList , Added <time datetime> tags where blog dates renders

* feat(Blog): fix hover social links, fixed duplication not found search

* (SP: 3) [Frontend] Refactor Header UI and navigation states (#201)

* (SP: 3) [Frontend] Refactor Header UI and navigation states

- Add icon to the language switcher

- Add GitHub icon with stars indicator (frontend only)

- Update logo styles

- Improve touch interaction styles

- Verify correct placement and alignment of all header components

- Make mobile header modal full-screen

- Disable background scroll when mobile menu is open

- Highlight active navigation item

- Update navigation styles:

- Highlight Shop link when user is on Home pages
- Highlight Home link when user is on Shop pages
- Style changes only, no routing or logic changes

* fix CodeRabbit

* update HeaderButton styles

* fix: add accessibility for HeaderButton

* (SP: 3) [Testing] Vitest config + unit + integration tests for quiz module (#204)

* feat(quiz-ui): quiz UI polish - tabs, category accents, color scheme (issues #181, #193, #194)

- Refactor QaTabButton to shared CategoryTabButton component
- Add category accent colors to QuizCard, buttons, progress indicators
- Standardize colors with CSS variables, traffic light timer
- Add DynamicGridBackground to quizzes list page
- Border-only answer feedback, semi-transparent progress styles

* docs: update .gitignore

* fix(quiz): align disqualification threshold with warning banner

Changed violationsCount > 3 to >= 3 in QuizResult points block
to match the warning banner threshold at line 124.

* feat(quiz-testing): add quiz unit tests

- Configure Vitest for quiz module
- Add test factories and setup utilities
- Add quiz-crypto tests (13 tests)
- Add quiz-session tests (12 tests)

* test(quiz): add integration tests for verify-answer API and useAntiCheat hook (#199)

- verify-answer.test.ts: 8 tests for API endpoint
  - Correct/wrong answer verification
  - Validation errors (missing fields, tampered data)
  - Security: rejects modified encrypted answers

- quiz-anticheat.test.ts: 10 tests for useAntiCheat hook
  - Detects copy, paste, context-menu, tab-switch events
  - Respects isActive flag
  - Reset and cleanup functionality

Total quiz tests: 52 (9 setup + 25 unit + 18 integration)

* test(quiz): expand test coverage to 90%+ with hooks, API routes, and UI flow

Add 28 new tests covering:
- useQuizSession hook (6 tests)
- useQuizGuards hook (8 tests)
- guest-quiz storage (5 tests)
- guest-result API route (5 tests)
- quiz-slug API route (3 tests)
- QuizContainer UI flow (1 test)

Coverage: 35% -> 90.94% (quiz scope)
Tests: 52 -> 80

* chore: remove coverage-quiz from git, add to .gitignore

* chore: add coverage-quiz to .gitignore, fix quiz guards test

* fix(leaderboard): improve table mobile

* fix(leaderboard): correct malformed shadow class syntax for avatar glow

* Feature/leaderboard style update (#206)

* fix:leaderboard  update leaderboard-style

* fix:leaderboard update leaderboard-style on mobile

* fix: resolve CodeRabbit issues and conflicts

* fix: move row border to first cell to resolve CodeRabbit issue

* fix: move row border to first cell to resolve CodeRabbit issue new

* fix(leaderboard): improve table mobile

* fix(leaderboard): correct malformed shadow class syntax for avatar glow

* test(q&a): add comprehensive qa tests and coverage setup (#208)

* test(q&a): add comprehensive qa tests and coverage setup

* test(q&a): align mocks and reset in qa tests

* (SP: 1) [Frontend] Remove Contacts References (#211)

* test(q&a): add comprehensive qa tests and coverage setup

* test(q&a): align mocks and reset in qa tests

* chore(nav): remove contacts page references

* Sanity (#209)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* feat(Blog): Fix for  click-outside-to-close search, recommended posts are limited to 3

* feat(Blog): selectedAuthorData fixed

* feat(Blog): Added description for /blog/[slug] metadata, Added Schema.org JSON‑LD for Article (BlogPosting) and BreadcrumbList , Added <time datetime> tags where blog dates renders

* feat(Blog): fix hover social links, fixed duplication not found search

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added scroll on the main blog page on filtering by author, fied breadcrumbs category translaion, added category to the recommended cards, fixed search for localisations

* feat(Blog): Changed image size on the post details page

* chore(release): update changelog for v0.5.0

* chore(release): v0.5.0

* [Refactor] Code Quality Improvements: Accessibility, Mobile Support, … (#213)

* fix(leaderboard): adjust podium heights for better visibility on desktop

* Feature/leaderboard style update (#214)

* fix(leaderboard): fix layout centering

* feat(Blog) (#216)

* feat(Blog) (#218)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* feat(Blog): Fix for  click-outside-to-close search, recommended posts are limited to 3

* feat(Blog): selectedAuthorData fixed

* feat(Blog): Added description for /blog/[slug] metadata, Added Schema.org JSON‑LD for Article (BlogPosting) and BreadcrumbList , Added <time datetime> tags where blog dates renders

* feat(Blog): fix hover social links, fixed duplication not found search

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added scroll on the main blog page on filtering by author, fied breadcrumbs category translaion, added category to the recommended cards, fixed search for localisations

* feat(Blog): Changed image size on the post details page

* feat(Blog): added tests

* feat(Blog): fix for big post on the post page, added tests

* feat(Blog): resolving comments

* feat(Blog): fixed hover for social links icins - dark theme

* (SP: 1) feat(i18n): translate 404 error page (#217)

- Add 404 translations (uk/en/pl)
- Implement [Global/Local/Combined] strategy
- Add helpful navigation links

* (SP: 2) [Frontend] Refactor Home HeroSection and Footer stylestor/home (#221)

* (SP:1) fix: 404 page layout (#219)

- 404 translations (uk/en/pl)
- Implement Global strategy

* feat(Blog) (#222)

* feat(Blog):fix for clickable link in post details, fix for author details

* feat(Blog):refactoring after removing author modal

* feat(Blog): fix unified date format

* feat(Blog): Fix for  click-outside-to-close search, recommended posts are limited to 3

* feat(Blog): selectedAuthorData fixed

* feat(Blog): Added description for /blog/[slug] metadata, Added Schema.org JSON‑LD for Article (BlogPosting) and BreadcrumbList , Added <time datetime> tags where blog dates renders

* feat(Blog): fix hover social links, fixed duplication not found search

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added: breadcrumbs to the post details page and updated the BreadcrumbList, logo to the cocial links in User info, Fixed: main container alignment, category navigation in breadcrumbs

* feat(Blog): Added scroll on the main blog page on filtering by author, fied breadcrumbs category translaion, added category to the recommended cards, fixed search for localisations

* feat(Blog): Changed image size on the post details page

* feat(Blog): added tests

* feat(Blog): fix for big post on the post page, added tests

* feat(Blog): resolving comments

* feat(Blog): fixed hover for social links icins - dark theme

* feat(Blog): bringing the style on the blog page to a single site style

* feat(blog): aligning syles

* feat(blog): resolving comment from CodeRabbit

* feat(blog):fix comment for deployment

* Update AI model from 'llama-3.3-70b-versatile' to 'llama3-70b-8192' (#223)

* (SP 2) [Frontend] Update Features section content and improve mobile UX (#224)

* (SP 2) [Frontend] Update Features section content and improve mobile UX

- Features Section: Refined feature content and visuals.
- Mobile UX: Improved responsive layout and scaling for feature cards and interactive elements.
- Visual Enhancements: Added dynamic particle background effects to the Pricing section.

* fix(review): address accessibility, security, and performance feedback

* fix(review): resolve accessibility and hydration issues

* fix(perf): implement frame-rate independent animations

* fix(review): address accessibility, security, and performance feedback

* fix(review): enable SSR for features section and support HiDPI canvas

* fix(review): correct HiDPI logic for particle canvas measurements

* (SP:3) feat(i18n): add UA and PL translations for shop/admin pages

Add comprehensive i18n support for shop and admin sections in 3 languages (en, uk,
  pl).

  Translation coverage:
  - Shop pages: main page, products, cart, checkout, orders
  - Admin pages: dashboard, products management, orders management
  - Navigation: header, mobile menu, category links
  - Product components: cards, filters, sort, badges (NEW/SALE)
  - Category names: Apparel, Lifestyle, Collectibles
  - All UI buttons, labels, and actions

  Key changes:
  - Added ~250+ translation keys to messages/en.json, messages/uk.json,
  messages/pl.json
  - Updated 20+ components to use useTranslations() and getTranslations()
  - Implemented color translation in cart and product detail pages
  - Translated hero message
  - Added badge translations

* fix(i18n): correct translation keys and localization in shop pages

  - Replace confusing error.order with success.orderLabel in checkout success page
  heading
  - Localize boolean stockRestored display (yes/no instead of true/false) in order
  details
  - Fix active state detection for shop category links in mobile menu using search
  params
  - Add missing translation keys (orderLabel, yes, no) to all locales (en, uk, pl)

* fix(netlify): resolve AI API crash and 404 locale/theme issues

AI fixes:
  - Extract getClientIp to separate file (avoid db import crash)
  - Add missing zod dependency to package.json

  404 page fixes:
  - Use NEXT_LOCALE cookie for locale detection on Netlify
  - Add theme detection script in root layout
  - Update styling with hero background and gradient text

* Update frontend/app/not-found.tsx



* (SP:3) feat(i18n): translate about page and auth form validation messages

  - Add about page translations (EN, UK, PL)
  - Add auth.fields.validation translations for form errors

* fix(api): resolve Netlify 503 errors and harden AI explain endpoint

 - Use dynamic import for groq-sdk (Netlify compatibility)                                                    - Bypass rate limiting for unknown IPs (serverless safety)
  - Safe JSON parsing with request.text() + empty body check
  - Fix ReferenceError: remove undefined errorMessage variable
  - Remove sensitive debug info from client responses
  - Add i18n keys: pricing.heading, sponsors.ctaAriaLabel

* feat(api): add GET health check endpoint for ai-explain

* chore(release): v0.5.1

---------

Co-authored-by: liudmylasovetovs <milkaegik@gmail.com>
Co-authored-by: Tetiana Zorii <131365289+TiZorii@users.noreply.github.com>
Co-authored-by: Anna <komrakova.anna@gmail.com>
Co-authored-by: AlinaRyabova <alinavr7@gmail.com>
Co-authored-by: Yevhenii Datsenko <yevheniydatsenko@gmail.com>
Co-authored-by: YNazymko12 <yulychka12@gmail.com>
Co-authored-by: liudmylasovetovs <127711697+liudmylasovetovs@users.noreply.github.com>
Co-authored-by: AlinaRyabova <115992255+AlinaRyabova@users.noreply.github.com>
Co-authored-by: Lesia Soloviova <106915140+LesiaUKR@users.noreply.github.com>
Co-authored-by: Yuliia Nazymko <122815071+YNazymko12@users.noreply.github.com>
Co-authored-by: Yevhenii Datsenko <134847096+yevheniidatsenko@users.noreply.github.com>
Co-authored-by: tetiana zorii <tanyusha.zoriy@gmail.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: 9 people