## Summary
Overhauls the README structure and replaces all product screenshots with
fresh captures from the current UI.
### Structure
- Merged the two duplicate galleries (Features + Screenshots) into a
single inline **Product Tour** — one description + one screenshot per
feature.
- Replaced fragile GitHub `user-attachments` `<img width="3024">` tags
with clean local-file markdown (``).
- De-italicized the Comparisons and Production-Ready tables and removed
Google-Docs paste artifacts (`\+` / `\-` escapes).
- Trimmed keyword repetition, added a Table of Contents, moved Quick
Start up, and made headers consistent.
### Screenshots (all refreshed from the live UI)
Home overview, Logs, Traces (**waterfall**), **Service Graph**, Metrics
(**Explore** tab), Dashboards (K8s namespace w/ template variables), RUM
session replay, Alerts, **Incidents**, Pipelines, **AI Observability**,
and the **O2 AI Assistant** — several of these features weren't
represented before.
Removed 14 stale/unused screenshots (`zo_home`, `zo_add_user`,
`create-panel`, `dashboard2`, `error-tracking`, `function`,
`ingestion1/2`, `map`, `performance`, `streams`, `traces-overall`, old
`dashboard`/`pipeline`).
### Verification
- Every image reference in the README resolves to a file in
`screenshots/`; no screenshot is orphaned.
- Docs-only change — no code touched.