feat: Add torrent health indicator

[Raphael005]

Summary

Implement a visual health indicator for torrents based on seeder availability.

Changes

Backend

• Add TorrentHealth enum (CRITICAL to EXCELLENT) to shared/types/Torrent.ts
• Create calculateTorrentHealth utility in shared/util/torrentHealth.ts
• Update all 5 client adapters (rTorrent, qBittorrent, Transmission, Deluge, Neptune) to compute and include health in torrent properties

Frontend

• Add health column to TorrentListColumns
• Add i18n strings for health labels (Critical, Poor, Fair, Good, Excellent)
• Create Health icon (heart-shaped SVG)
• Create HealthIndicator component with color-coded labels
• Update TorrentListCell to render health column
• Add health-indicator SCSS styles with color variations
• Update FloodSettings schema with default health column configuration

Health Levels

Level	Color	Seeders
Critical	Red	0
Poor	Orange	1-2
Fair	Yellow	3-5
Good	Light Green	6-10
Excellent	Green	10+

Testing

• All TypeScript type checks pass (pnpm run check-types)
• All ESLint checks pass (pnpm run lint)
• Unit tests pass (integration tests require torrent client binaries)

Co-Authored-By: Warp agent@warp.dev

[codecov]

Codecov Report

❌ Patch coverage is 40.62500% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 56.41%. Comparing base (914a82b) to head (dfbd3ca).
⚠️ Report is 163 commits behind head on master.

Files with missing lines	Patch %	Lines
shared/util/torrentHealth.ts	28.00%	15 Missing and 3 partials ⚠️
server/services/Deluge/clientGatewayService.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1374      +/-   ##
==========================================
+ Coverage   56.05%   56.41%   +0.36%     
==========================================
  Files          96       96              
  Lines        4223     4304      +81     
  Branches      860      874      +14     
==========================================
+ Hits         2367     2428      +61     
- Misses       1655     1665      +10     
- Partials      201      211      +10     

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[trim21]

please fix ci, otherwize I'll close this