[maksymhryzodub-prog]

Jira: CLEAN-167. Stacked on #140 (CLEAN-165) — merge that first; this diff is the last commit only.

What it does

A Slack message about a failed agent now says which installation it came from. Set RANCH_ENVIRONMENT on the API deployment (dev, staging, prod-eu) and every channel-level message starts with it in brackets:

🔴 @channel [dev-mazda] Test Chatbot — incident #12 · down since 4:04 PM · OOMKilled
🔴 [dev-mazda] Agent failed: Test Chatbot            ← webhook
✅ [dev-mazda] Test notification from Ranch

Thread replies carry no label (they live inside the root). Unset: nothing changes — an install that never set it looks as it did.

How

• infrastructure.environment in the settings catalogue, resolved by InfraConfigGateway.getEnvironment() the way api_public_url is: setting → RANCH_ENVIRONMENT → null. Trimmed; a settings outage yields null, so a notification still goes out, unlabelled.
• AgentEventModule imports SettingModule; NotificationDestinationService.environment() is the one read, passed into renderRoot / renderOpened / renderClosed / renderTest. The label is escaped like any text that is not ours.
• The destination view (API DTO, Settings → Notifications, get_notification_destination) reports environment, so the owner sees what messages will carry — and a hint to set the variable when it is empty.
• .env.example and docs/operations/agent-events.md tell DevOps the variable and what it does.

Verified

• api: bun run build; jest for agent/event + setting + tool-secrets (227) and the whole suite; eslint --quiet + Prettier on changed files. New specs: the label on every channel-level renderer and absent from replies; the flow on the bot (root and rewrites labelled, thread not) and on the webhook; getEnvironment precedence, trimming and the null cases.
• admin: bun test slices (195), npx nuxt typecheck, bun run locale:check.
• Not run live: the label through a real Slack post — the renderers are the ones the live proof of feat(api,admin): Slack bot transport — one message per incident, the story in its thread, the state as a reaction (CLEAN-165) #140 exercised, with one string prepended.

Twin consoles

admin changed (the view's one line). app has no agent/event sub-slice: nothing to mirror.

For DevOps

Add to the API deployment: RANCH_ENVIRONMENT=<short name of the cluster>. No restart beyond the rollout; the owner can override it in settings.

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