Changelog

All notable changes to this project will be documented here.

The format follows Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Tool.dateAdded: documented optional ISO YYYY-MM-DD field for build-time ordering / future home-page “New Tools” surfacing (docs/TOOL_ENGINE_SPEC.md); tracks GitHub #21.

Social share popover on tool pages with copy link, X, WhatsApp, Facebook, LinkedIn, Reddit, Telegram, and email targets.
@radix-ui/react-popover dependency for accessible share panels.

Tool share action now keeps native navigator.share on supported mobile devices and uses the social popover as the desktop/fallback path.

5 new tools: Unix Timestamp Converter (/datetime/unix-timestamp-converter), Age in Planets (/lifestyle/age-in-planets), GPA Calculator (/lifestyle/gpa-calculator), Pythagorean Theorem (/math/pythagorean-theorem), UTM Builder (/seo/utm-builder).
GPA Calculator supports international scales: US (4.0), UK honours, India 10-point, Germany 5-point (inverted), and custom scale.
Cmd+K command palette for tools and KB search (components/search/CommandPalette.tsx).
lib/kb-markdown.ts strips a leading Markdown heading when it duplicates the catalog title, so KB pages keep a single visible h1.

Knowledge base articles render as static Markdown via react-markdown + GFM; metadata lives in lib/kb-articles.ts (not per-file YAML frontmatter).
Documentation aligned with the KB pipeline, dev server port 3001, and pnpm 10.
Next.js 16 network boundary: middleware.ts → proxy.ts with export function proxy; CSP connect-src uses valid Sentry hosts (https://*.ingest.sentry.io, https://*.sentry.io) instead of invalid o*.ingest.
Root layout: themeColor moved from metadata to export const viewport (Next generateViewport / viewport API).

Visual breadcrumb navigation on tool pages and category pages (components/seo/Breadcrumbs.tsx)
FavoriteButton (star) on every tool page — persisted to localStorage via lib/user-data.ts
Recents and Favorites sections in search modal (shows last 5 tools used / starred)
Category filter chips inside search modal to narrow results by category
Tool descriptions shown in search results (third line below category badge)
Tool descriptions shown on Popular Tools cards on the home page
Hero trust signals on home page (Runs in your browser · Instant results · Every formula shown)
Theme toggle (light / dark) in the header; persists across sessions; no flash on load
tabular-nums on primary result value to prevent digit-width jitter

Primary result card now renders with CheckCircle2 icon, text-3xl value, and highlighted bg-primary-soft background (ToolResult.tsx)
Empty result state shows a contextual prompt and a "Try example" shortcut button
ToolForm input height increased to 44 px touch targets (py-2.5); number fields set inputMode="numeric"/"decimal" and enterKeyHint="done" for mobile keyboard
ToolActions share and reset buttons use consistent outline style with press feedback (active:scale-[0.98])
Brand name (NEXT_PUBLIC_BRAND_NAME) now wired into all metadata — app/layout.tsx and app/page.tsx no longer hardcode "Utilix"
Search modal backdrop uses a theme-adaptive --color-overlay CSS variable with backdrop-blur-sm so light and dark themes both render a uniform backdrop (no more grey-header / white-content split in light mode)

Schema-driven tool engine (lib/engine/) — tools defined as data, not code; no bespoke component per tool
49 tools across 11 categories: Finance, Health, Math, Date & Time, Converters, Text, Developer, Design, SEO, Generators, Lifestyle
Static prerendering for all tool and category pages with URL ↔ form state sync
Cached RSC for live currency FX rates via Frankfurter API (cacheLife('day'))
Knowledge-base articles (content/kb/) — 35+ paired KB articles
pnpm create-tool <category> <slug> CLI scaffolding command
CI pipeline: TypeScript strict check, ESLint, Vitest unit tests, Playwright E2E, axe accessibility gate
CD pipeline: Docker image → GHCR → VPS SSH deploy via GitHub Actions
WCAG 2.1 AA compliance gate (@axe-core/playwright, hard-fail)
Lighthouse performance budget enforcement (≥ 95 perf / 100 SEO / 100 a11y)
JSON-LD structured data: SoftwareApplication, HowTo, FAQPage, BreadcrumbList, CollectionPage
GA4 Consent Mode v2 with cookie consent banner
Sentry error tracking integration