8 — Eliminate any type in ReleaseDownloader

Problem: Line 62 of ReleaseDownloader.vue uses (a: any) for GitHub API response mapping. TypeScript should infer or be given proper types.

Action:

• Define a GitHubAsset interface
• Type the API response mapping properly

Files touched:

• .vitepress/theme/components/ReleaseDownloader.vue

Done when: Zero any usage in the codebase.