Implements automatic categorization of tracked websites into 12 semantic categories (Social Media, Productivity, Entertainment, News, Shopping, Development, Education, Finance, Health, Gaming, Communication, Uncategorized).

Changes

Core Classification

• Added WebsiteCategory enum and classifyWebsite() utility with pattern matching for 150+ domains
• Extended Tab entity with category field, defaulting to Uncategorized
• Migration logic in TabsRepository.initAsync() classifies existing tabs on extension startup

UI Integration

• Enhanced BadgeIcons component with color-coded category badges (11 unique colors)
• Updated data flow: TabList → TabItem → BadgeIcons to propagate category information
• Added i18n strings for all categories across 6 languages (EN, ES, DE, RU, JA, ZH_CN)

Example Classification

classifyWebsite('github.com')        // → WebsiteCategory.Development
classifyWebsite('youtube.com')       // → WebsiteCategory.Entertainment
classifyWebsite('unknown-site.com')  // → WebsiteCategory.Uncategorized

Categories appear as small colored badges next to website URLs in the tracker UI. Classification is persistent and happens once per domain.

• Fixes Feature : add auto classification of websites types #1

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