refactor: rebrand from cs-agent to BossChat

- Rename Go module: cs-agent → bosschat
- Rename all import paths across 200+ Go files
- Rename SDK: cs-ai-agent-sdk → bosschat-sdk
- Rename message protocol: cs-agent:* → bosschat:*
- Rename JS globals: CSAgentConfig → BossChatConfig
- Rename CSS classes: cs-agent-* → bosschat-*
- Update Makefile APP_NAME and ARCHIVE_NAME
- Update logo assets
- Fix display name: BoosChat → BossChat

web/components/kefu/message-list.tsx

@@ -214,7 +214,7 @@ export const KefuMessageList = forwardRef<KefuMessageListHandle, KefuMessageList
     return (
       <div
         ref={containerRef}
-        className="cs-agent-scrollbar flex min-h-0 flex-1 flex-col gap-4 overflow-y-auto px-4 py-4"
+        className="bosschat-scrollbar flex min-h-0 flex-1 flex-col gap-4 overflow-y-auto px-4 py-4"
       >
         <div ref={contentRef} className="flex flex-col gap-4">
           {hasMoreOlder && onLoadOlder ? (

web/components/kefu/widget-demo.tsx

@@ -6,7 +6,7 @@ import { useEffect, useMemo, useState } from "react"
 
 import type { CSAgentConfig } from "@/lib/sdk/config-types"
 
-const STORAGE_KEY = "cs-agent-web-widget-test-config"
+const STORAGE_KEY = "bosschat-web-widget-test-config"
 const DEFAULT_JWT_TTL_MINUTES = "30"
 const INITIAL_CONFIG: CSAgentConfig = {
   channelId: "",
@@ -55,7 +55,7 @@ function removeMountedWidget() {
   window.CSAgentWidget?.destroy()
   document
     .querySelectorAll(
-      '[data-cs-agent-widget="launcher"], [data-cs-agent-widget="frame"], [data-cs-agent-widget="script"]'
+      '[data-bosschat-widget="launcher"], [data-bosschat-widget="frame"], [data-bosschat-widget="script"]'
     )
     .forEach((node) => node.remove())
 
@@ -71,8 +71,8 @@ function injectWidget(config: CSAgentConfig) {
 
   const script = document.createElement("script")
   script.async = true
-  script.src = `${window.location.origin}/sdk/cs-ai-agent-sdk.min.js`
-  script.dataset.csAgentWidget = "script"
+  script.src = `${window.location.origin}/sdk/bosschat-sdk.min.js`
+  script.dataset.bossChatWidget = "script"
   document.body.appendChild(script)
 }
 
@@ -182,8 +182,8 @@ export function KefuWidgetDemo() {
 
   const snippet = useMemo(() => {
     const scriptSrc = origin
-      ? `${origin}/sdk/cs-ai-agent-sdk.min.js`
-      : "/sdk/cs-ai-agent-sdk.min.js"
+      ? `${origin}/sdk/bosschat-sdk.min.js`
+      : "/sdk/bosschat-sdk.min.js"
 
     const configLines = [`    channelId: "${config.channelId || ""}"`]
     if (config.authMode === "jwt") {