Declutter the dashboard UX

[Harsh-2002]

Summary

• group lower-frequency navigation and progressively disclose advanced settings and runtime metadata
• shorten page headers, helper copy, empty states, and first-run flows across every routed UI section
• improve form associations, focus states, icon-button labels, semantic status colors, and scrollbar discoverability
• refresh PRODUCT.md, DESIGN.md, and the Impeccable design sidecar to match the refined experience
• rebuild the embedded frontend assets

Validation

• npm run lint
• npm test
• npm run build
• make build-all
• make lint
• make test
• Impeccable detector: no blocking findings
• Impeccable doctor: no context drift
• isolated desktop and mobile browser inspection (live instance untouched)

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 0e7e4c4602

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[chatgpt-codex-connector]

Restore webhook secret verification instructions

When an operator creates a webhook, this one-time view is their last opportunity to learn what the secret is for, but the page now only says to copy it and no longer mentions X-Orva-Signature, X-Orva-Timestamp, or that the receiver must verify HMAC-SHA256 over timestamp + "." + raw_body. A receiver implemented from this flow can therefore hash the wrong payload or ignore verification entirely; retain the verification contract here or link directly to the relevant documentation before the secret is dismissed.

Useful? React with 👍 / 👎.