feat: port upstream v1.7.0 features, UI highlight contrast, and dependency updates

[kaiserc]

Summary

Ported upstream \ orlink\ v1.7.0 features and improvements into \klink, while preserving fork-specific capabilities (E-Books & Audiobooks, Web UI, Daemon, Metadata/Peer inspectors, Network interface binding, etc.).

Features & Fixes Included

1. Drag-and-Drop & Clipboard .torrent\ Support: Drop a .torrent\ file onto the terminal or paste a local path/URI in search to start downloading.
2. Tracker Announce Preservation: Intact tracker list and private passkey preservation when reading .torrent\ files + 16MB file size protection.
3. Apibay Cache Sentinel Retry: Automatic cache-busting fallback retry on &cat=0\ when Apibay returns a cached zero-result sentinel (\id: 0).
4. Full-Row UI Highlight Contrast: Active items in Results, Downloads, and Seeding views now apply \�old={here}\ and \dimColor={!here}\ across all metadata columns.
5. Dependency & Docs Updates: Updated @types/node, \ sx, \�itest, and \esbuild\ (with script allowances); updated README and CONTRIBUTING.

Verification

• 
  pm test: 53 test files passed, 353 unit tests passed.
• 
  pm run typecheck: 0 errors.
• 
  pm run build: Clean build.