guide.md documents a UI/Wails desktop app and diff viewer that don't exist in the repo

[kavix]

Description

guide.md describes features that aren't present anywhere in the codebase:

• A ui/ React/Next.js frontend ((cd ui && npm run build))
• A Wails-based native desktop app (wails build, build tags
  -tags desktop,production, -tags no_gui)
• An eko ui subcommand
• A "Monaco Diff Viewer" for side-by-side diffs with syntax highlighting

None of this exists: there's no ui/ directory, no wails.json /
Wails config, and cmd/ has no ui subcommand — cobra only registers
init, save, history, and restore.

Impact

New contributors or users following guide.md will hit build failures
(cd ui — no such directory) and missing commands (eko ui —
unknown command). This is a trust/credibility issue for anyone evaluating
the project.

Suggested fix

Either:

1. Strip guide.md down to what's actually implemented (CLI-only), or
2. If the UI/Wails app is planned but not yet built, clearly mark those
   sections as "Planned" / "Not yet implemented" so they're not mistaken for
   current functionality.