feat(skills): surface Company Brain-created skills (#1412)

## What and why

Make skills created through Company Brain visible in the existing Settings catalog without a manual reload. The UI labels Slack-originated skills and refreshes the catalog while the Settings page is open.

```mermaid
flowchart LR
  A[Slack approval] --> B[Company Brain skill catalog]
  B --> C[Skills API query]
  C --> D[Settings Skills list]
  D --> E[Created by Company Brain label]
```

## Validation

- `bunx biome check apps/web/components/settings/company-brain-skills.tsx apps/web/components/settings/company-brain-skills/domain.ts apps/web/components/settings/company-brain-skills/skill-row.tsx apps/web/hooks/use-brain-skills.impl.ts` — passed

## Impact

Settings polling refreshes every 15 seconds and on window focus. It does not change the Nova/browser chat workflow or create skills from that surface.

apps/web/components/settings/company-brain-skills.tsx

@@ -335,7 +335,8 @@ function CompanyBrainSkillsContent({
 					</div>
 
 					<p className="text-[11px] leading-5 text-[#596270]">
-						{SCOPE_HINTS[scopeFilter]}
+						{SCOPE_HINTS[scopeFilter]} Skills created through Company Brain
+						appear here automatically.
 					</p>
 
 					{uploadError ? (

apps/web/components/settings/company-brain-skills/domain.ts

@@ -13,6 +13,7 @@ export type SkillDraft = {
 
 export type SkillMarkdown = Pick<SkillDraft, "name" | "description" | "body">
 export type NewSkillOrigin = "web" | "upload"
+export type SkillOrigin = NewSkillOrigin | "slack"
 
 export type SkillAuthoringTarget = {
 	canEdit: boolean
@@ -51,6 +52,10 @@ export function emptySkillDraft(): SkillDraft {
 	}
 }
 
+export function skillOriginLabel(origin: SkillOrigin): string | null {
+	return origin === "slack" ? "Created by Company Brain" : null
+}
+
 export function setSkillDraftScope(
 	draft: SkillDraft,
 	scope: SkillScope,

apps/web/components/settings/company-brain-skills/skill-row.tsx

@@ -3,6 +3,7 @@
 import { cn } from "@lib/utils"
 import { formatDistanceToNow } from "date-fns"
 import { ChevronRight } from "lucide-react"
+import { skillOriginLabel } from "@/components/settings/company-brain-skills/domain"
 import type { BrainSkill } from "@/hooks/use-brain-skills"
 import { dmSans125ClassName } from "@/lib/fonts"
 
@@ -27,6 +28,16 @@ function ScopeBadge({ scope }: { scope: BrainSkill["scope"] }) {
 	)
 }
 
+function OriginBadge({ origin }: { origin: BrainSkill["origin"] }) {
+	const label = skillOriginLabel(origin)
+	if (!label) return null
+	return (
+		<span className="inline-flex h-[18px] shrink-0 items-center rounded-full bg-[#1F2E3C] px-1.5 text-[10px] font-medium text-[#A8C7E8]">
+			{label}
+		</span>
+	)
+}
+
 export function SkillRow({
 	skill,
 	onOpen,
@@ -51,6 +62,7 @@ export function SkillRow({
 						{skill.name}
 					</h3>
 					<ScopeBadge scope={skill.scope} />
+					<OriginBadge origin={skill.origin} />
 					{skill.status === "disabled" ? (
 						<span className="inline-flex h-[18px] shrink-0 items-center rounded-full border border-red-400/20 bg-red-400/[0.07] px-1.5 text-[10px] font-medium text-red-300">
 							Disabled

apps/web/hooks/use-brain-skills.impl.ts

@@ -5,6 +5,7 @@ import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query"
 import type {
 	NewSkillOrigin,
 	SkillDraft,
+	SkillOrigin,
 	SkillScope,
 } from "@/components/settings/company-brain-skills/domain"
 import { skillSaveRequestBody } from "@/components/settings/company-brain-skills/domain"
@@ -23,6 +24,7 @@ export type BrainSkill = {
 	scope: SkillScope
 	status: BrainSkillStatus
 	creatorUserId: string
+	origin: SkillOrigin
 	canEdit: boolean
 	canDelete: boolean
 	version: number
@@ -86,6 +88,9 @@ export function useBrainSkills() {
 		queryFn: () =>
 			jsonRequest<BrainSkillsResponse>(`${BASE}/`, {}, "Couldn't load skills."),
 		enabled: !!org?.id && !!user?.id,
+		staleTime: 0,
+		refetchOnWindowFocus: true,
+		refetchInterval: 15_000,
 	})
 }