refactor: rebrand npm packages @uncaged/* → @united-workforce/*

Package mapping:
- @uncaged/cli-workflow → @united-workforce/cli
- @uncaged/workflow-protocol → @united-workforce/protocol
- @uncaged/workflow-util → @united-workforce/util
- @uncaged/workflow-util-agent → @united-workforce/util-agent
- @uncaged/workflow-agent-hermes → @united-workforce/agent-hermes
- @uncaged/workflow-agent-claude-code → @united-workforce/agent-claude-code
- @uncaged/workflow-agent-builtin → @united-workforce/agent-builtin
- @uncaged/workflow-dashboard → @united-workforce/dashboard

Changes:
- 8 package.json name + dependency refs
- 82 files: import statements updated
- .changeset/config.json updated
- CLAUDE.md updated
- bunfig.toml restored for preload

CLI command (uwf) and directory names unchanged.

Closes shazhou/united-workforce#8

packages/workflow-dashboard/README.md

@@ -1,14 +1,14 @@
-# @uncaged/workflow-dashboard
+# @united-workforce/dashboard
 
 Web graph editor for visualizing and editing workflow YAML definitions.
 
 ## Overview
 
-A private alpha web app (not part of the runtime engine stack). Provides a React + `@xyflow/react` canvas for editing workflow roles, conditions, and graph transitions. Uses `@uncaged/workflow-protocol` types for validation and YAML round-tripping.
+A private alpha web app (not part of the runtime engine stack). Provides a React + `@xyflow/react` canvas for editing workflow roles, conditions, and graph transitions. Uses `@united-workforce/protocol` types for validation and YAML round-tripping.
 
 Planned integration: local `uwf connect` over WebSocket to sync YAML between CLI and the browser editor. The REST API and Elysia backend are currently stubs for development.
 
-**Dependencies:** `@uncaged/workflow-protocol`, `@xyflow/react`, React 19, react-router v7, Vite 8, Tailwind CSS v4, Elysia
+**Dependencies:** `@united-workforce/protocol`, `@xyflow/react`, React 19, react-router v7, Vite 8, Tailwind CSS v4, Elysia
 
 ## Installation