test(lib): cover agent-activity status labels (57→65 tests)

Extract TOOL_STATUS + statusFromPart from stores/events.ts into a pure
status-labels.ts (type-only Part import, erased at runtime; events.ts delegates).
8 tests pin the live 'what is the agent doing' labels: reasoning/text/known-tool
mappings, shared labels (search/edit groups), unknown-tool degrade to
'Running <tool>...', and the no-tool/unknown-type fallthroughs. typecheck clean.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/stores/events.ts

@@ -3,35 +3,13 @@ import { useConnections } from "./connections"
 import { useSessions } from "./sessions"
 import { send as notify } from "../lib/notifications"
 import { sanitizeBody } from "../lib/notify-format"
+import { statusFromPart } from "../lib/status-labels"
 import { addBreadcrumb } from "../lib/sentry"
 import type { Client, Part, Session, Message } from "../lib/sdk"
 
 // Session status from the server
 type SessionStatus = { type: "idle" } | { type: "busy" } | { type: "retry"; attempt: number; message: string }
 
-// Tool status labels derived from part type
-const TOOL_STATUS: Record<string, string> = {
-  read: "Gathering context...",
-  list: "Searching codebase...",
-  grep: "Searching codebase...",
-  glob: "Searching codebase...",
-  webfetch: "Searching web...",
-  edit: "Making edits...",
-  write: "Making edits...",
-  apply_patch: "Making edits...",
-  bash: "Running command...",
-  task: "Delegating...",
-  todowrite: "Planning...",
-  todoread: "Planning...",
-}
-
-function statusFromPart(part: Part): string {
-  if (part.type === "reasoning") return "Thinking..."
-  if (part.type === "tool" && part.tool) return TOOL_STATUS[part.tool] || `Running ${part.tool}...`
-  if (part.type === "text") return "Writing..."
-  return "Working..."
-}
-
 interface EventsState {
   connected: boolean
   reconnectAttempts: number