/settings/tokens says how to connect Claude Code and OpenCode to this forge, with its own address #6087

plugins/claude-code and plugins/opencode exist, but nothing the forge serves mentions them, so a person holding a new token doesn't know the next step.

Done when:

• [ ] /settings/tokens shows a short "Connect your harness" section with two copyable lines that use this forge's own public URL: FORGE_URL=<url> FORGE_TOKEN=<token> claude --plugin-dir plugins/claude-code, and the OpenCode one from plugins/opencode/README.md. Right after a token is minted, its value fills the lines. Otherwise they show a <token> placeholder.
• [ ] Both plugin READMEs link to /settings/tokens for making the token.
• [ ] A test renders the page and finds both lines with the configured address and no token value except the one just minted. bun scripts/design-lint.ts passes.