Sooda v1.0.0

Added

• Three calculators: profit % (purchase + profit % → selling price), sell price (purchase + selling → profit %/amount, with clear loss display), and discount (original + % → final price & savings) — all backed by a unit-tested pure calculation engine.
• Bilingual UI (English/Persian) with instant in-app switching, full RTL mirroring, and automatic browser-language detection.
• Persian & Arabic-Indic digit input with normalization, plus locale-aware number formatting (fa-IR / en-US) throughout.
• Offline-first PWA: Workbox precaching of all assets, auto-updating service worker, installable with maskable icons — works fully in airplane mode after first load.
• History stored in IndexedDB (Dexie): live list, search (any digit system), per-item delete, clear-all with confirmation, CSV export with UTF-8 BOM, and a friendly empty state.
• Liquid-glass design system: backdrop blur + saturation surfaces with gradient hairline borders and specular highlights, ambient drifting color blobs, SVG-refraction shine on the result card, iOS-style typography and spacing.
• Motion: spring-physics mode transitions, sliding segmented control, count-up result numbers, staggered history entrance, drag-to-dismiss bottom sheets — all disabled under prefers-reduced-motion.
• Themes: light / dark / system with animated toggle and theme-color meta sync.
• Accessibility: labeled inputs with inputmode="decimal", aria-live result announcements, visible focus rings, ≥4.5:1 contrast; Lighthouse 100 accessibility score.
• Micro-interactions: haptic feedback (navigator.vibrate) on primary actions, copy-result button.
• Self-hosted Inter & Vazirmatn variable fonts (no external requests).
• GitHub Actions CI/CD: typecheck → test → build → deploy to GitHub Pages.