[svadrutk]

Follow-up to #222.

What changed

• Adds four screenshots to the Slack guide, stored in guides/slack/assets/ and declared in meta.yaml:
  • Slack's Create from a manifest dialog opened from the prefilled link
  • Basic Information → App Credentials (values replaced with placeholders)
  • Control Plane Settings → Identity with User Identity, the Slack provider, Manual credentials, and all 30 scopes (placeholder credentials)
  • Danger Zone → Server Availability
• Updates step 4 of speakeasy.md: Scope is now a multi-select list, so the step says to select the scopes rather than paste a space-separated list. research.md is updated to match.

Notes

• The <!-- screenshot: … --> comments stay in place, because guide lint requires one in each step.
• The screenshots are 506–776 px wide, limited by the capture tool.
• The Identity screenshot comes from a temporary server in the swad-test project.

Verification

• go run ./cmd/lint-guide ../guides/slack passes.
• go/internal/gen accepts the asset paths and hashes.