feat: embed 1,400 jazz standards catalog and add instant search in web and CLI

[johnksterling]

Summary

Embeds the complete 1,400 Jazz Standards catalog directly into the binary with zero runtime dependencies or network calls. Users no longer need to find or copy-paste obscure irealb:// URLs—they can simply search by song title or composer.

Features Added

• Embedded 1,400 Jazz Standards Dataset:

  • Embedded jazz1400.txt (~1.2 MB uncompressed, ~280 KB in binary) into internal/jazz/standards.go via //go:embed.
  • In-memory lazy indexing and fast sub-millisecond search across song titles and composers (exact, prefix, and substring ranking).

• REST API Endpoint:

  • Added GET /api/standards?q=<query>&limit=<n> returning matching standards with key, style, composer, and iReal URL.
  • Updated POST /api/analyze and POST /api/companion/* to accept a standard title parameter.

• Interactive Web Interface Search:

  • Added a dedicated Search Standards (1,400) tab in web/src/App.tsx.
  • Debounced real-time autocompletion with instant search results showing title, composer, and key badges.
  • Quick-pick chips for popular standards (Autumn Leaves, All The Things You Are, Blue Bossa, Giant Steps, Take The A Train, Stella By Starlight, Body and Soul, Fly Me To The Moon, Round Midnight).
  • One-click loading, analysis, and SVG score preview.

• CLI Direct Song Title Resolution:

  • Extended LoadTune in internal/jazz/loader.go: if the specified argument is not a local file or raw URL, it resolves directly against the 1,400 standards library:

    jazz-tools analyze "Autumn Leaves"
    jazz-tools analyze "Giant Steps"
    jazz-tools companion "Take The A Train" --pdf

Verification

• All Go unit tests passing: go test -v ./...
• Standards search & analyze endpoint tests passing
• CLI analysis of standards verified
• Web build succeeds: npm run build
• Local server running and tested on port 8080