feat(web): automations contracts, API client, atoms and hooks

Foundation for the v1 automations UI. Mirrors backend Pydantic schemas
into Zod and wires the data layer end-to-end so feature surfaces can
be built on top.

contracts/types/automation.types.ts:
- AutomationStatus, TriggerType, RunStatus enums.
- AutomationDefinition envelope (PlanStep, TriggerSpec, Execution,
  Metadata, Inputs).
- AutomationCreate/Update/Detail/Summary/List + listParams.
- TriggerCreate/Update/Detail.
- RunSummary/Detail/List + runListParams.

lib/apis/automations-api.service.ts:
- list/get/create/update/delete automations.
- add/update/remove triggers (sub-resource).
- list/get runs (read-only sub-resource).
- safeParse on every write, 204-safe deletes.

atoms/automations/:
- automationsListAtom (active search space, first page).
- 6 mutation atoms with toast + cache invalidation.

hooks/:
- use-automations.ts wraps the list atom.
- use-automation.ts: parameterized detail by id.
- use-automation-runs.ts: useAutomationRuns + useAutomationRun.

lib/query-client/cache-keys.ts: automations namespace (list, detail,
runs, run) keyed by (id, limit, offset) where relevant.

Smoke: zod round-trip OK on backend-shape payloads (Automation,
AutomationCreate, Trigger, Run); typecheck clean for new files;
biome clean.

surfsense_web/lib/query-client/cache-keys.ts

@@ -126,4 +126,14 @@ export const cacheKeys = {
 		batchUnreadCounts: (searchSpaceId: number | null) =>
 			["notifications", "unread-counts-batch", searchSpaceId] as const,
 	},
+	automations: {
+		// list endpoint is keyed by pagination too so distinct pages don't collide
+		list: (searchSpaceId: number, limit: number, offset: number) =>
+			["automations", "list", searchSpaceId, limit, offset] as const,
+		detail: (automationId: number) => ["automations", "detail", automationId] as const,
+		runs: (automationId: number, limit: number, offset: number) =>
+			["automations", "runs", automationId, limit, offset] as const,
+		run: (automationId: number, runId: number) =>
+			["automations", "runs", automationId, runId] as const,
+	},
 };