[Devlog] Release History Summary (v1.0.0.4 ~ v1.0.0.8)

Unified Category Widget: Completely removed the legacy category_link option to eliminate confusion and unified all category displays under a single Category Menu widget.
Post Count Display Option (showPostCount): Added a toggle checkbox in the admin design editor to show/hide post counts next to category names (e.g., Development (5)).
Admin Design Live Preview Fix: Enhanced widget previews in the design editor so that Recent Posts, Popular Posts, and Category Menus render realistic placeholders accurately.
Smart hreflang Filtering (SEO): Generates hreflang alternate tags only for languages that contain published posts, effectively preventing search engines (e.g., Google AdSense / Search Console) from indexing empty fallback pages as thin content.

Official Engine Version System (APP_VERSION): Introduced the APP_VERSION constant in @sveltekitblog/shared and displayed active engine version badges in the admin sidebar and blog footer.
Full Multilingual Route Metadata: Completed hreflang alternates and canonical URL injection across all frontend routes (Home, Category, Tag, Search, Guestbook).
Footer Mobile Readability Polish: Optimized version badge contrast and layout padding on mobile viewport widths.

Mobile Core Web Vitals & Performance: Improved mobile loading performance through dynamic OG image generation, Google Fonts API caching, and asset preloading.
Sitemap 500 Fix: Removed non-existent legacy tag table queries from the sitemap.xml generator to guarantee uninterrupted sitemap indexing.
Dynamic HTML lang Attribute: Ensured the root <html> tag dynamically reflects the correct lang attribute (ko, en, ja) based on route context.
i18n Key Architecture: Standardized language badge translation keys under the common.lang.short_* namespace.

Svelte 5 Runes Warning Fix: Resolved reactive state compiler warnings in admin components.
Default Admin Entry Route Refactor: Streamlined the admin dashboard entry point and feedback flow.
Canonical URL Normalization: Fixed trailing slash discrepancies and multilingual canonical URL mismatches.

Naver Webmaster Advisor H1 Fix: Resolved duplicate <h1> tag detection by search engine bots by implementing Mobile-First SSR layout switching in LayoutRenderer.
Footer Layout Alignment: Aligned blog footer width and border styles with the header for consistent shadow rendering.
Repository Cleanup: Removed tracked temporary .bak files from git tracking.

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