docs: sync CN/JA READMEs with EN structure and fix all paths

- Move documentation files into language-specific folders (en, cn, ja)
- Add Chinese and Japanese translations for all docs
- Extract Docker section from README to separate doc file
- Update README to link to new doc locations

app/[lang]/about/cn/page.tsx

@@ -72,6 +72,28 @@ export default function AboutCN() {
                         <p className="text-xl text-gray-600 font-medium">
                             AI驱动的图表创建工具 - 对话、绘制、可视化
                         </p>
+                        <div className="flex justify-center gap-4 mt-4 text-sm">
+                            <Link
+                                href="/about"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                English
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/cn"
+                                className="text-blue-600 font-semibold"
+                            >
+                                中文
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/ja"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                日本語
+                            </Link>
+                        </div>
                     </div>
 
                     <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">

app/[lang]/about/ja/page.tsx

@@ -80,6 +80,28 @@ export default function AboutJA() {
                             AI搭載のダイアグラム作成ツール -
                             チャット、描画、可視化
                         </p>
+                        <div className="flex justify-center gap-4 mt-4 text-sm">
+                            <Link
+                                href="/about"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                English
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/cn"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                中文
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/ja"
+                                className="text-blue-600 font-semibold"
+                            >
+                                日本語
+                            </Link>
+                        </div>
                     </div>
 
                     <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">

app/[lang]/about/page.tsx

@@ -80,6 +80,28 @@ export default function About() {
                             AI-Powered Diagram Creation Tool - Chat, Draw,
                             Visualize
                         </p>
+                        <div className="flex justify-center gap-4 mt-4 text-sm">
+                            <Link
+                                href="/about"
+                                className="text-blue-600 font-semibold"
+                            >
+                                English
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/cn"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                中文
+                            </Link>
+                            <span className="text-gray-400">|</span>
+                            <Link
+                                href="/about/ja"
+                                className="text-gray-600 hover:text-blue-600"
+                            >
+                                日本語
+                            </Link>
+                        </div>
                     </div>
 
                     <div className="relative mb-8 rounded-2xl bg-gradient-to-br from-amber-50 via-orange-50 to-yellow-50 p-[1px] shadow-lg">

app/[lang]/page.tsx

@@ -28,8 +28,6 @@ export default function Home() {
     } = useDiagram()
     const router = useRouter()
     const pathname = usePathname()
-    // Extract current language from pathname (e.g., "/zh/about" → "zh")
-    const currentLang = (pathname.split("/")[1] || i18n.defaultLocale) as Locale
     const [isMobile, setIsMobile] = useState(false)
     const [isChatVisible, setIsChatVisible] = useState(true)
     const [drawioUi, setDrawioUi] = useState<"min" | "sketch">("min")
@@ -209,7 +207,7 @@ export default function Home() {
                         <div className="h-full rounded-xl overflow-hidden shadow-soft-lg border border-border/30">
                             {isLoaded ? (
                                 <DrawIoEmbed
-                                    key={`${drawioUi}-${darkMode}-${currentLang}`}
+                                    key={`${drawioUi}-${darkMode}`}
                                     ref={drawioRef}
                                     onExport={handleDiagramExport}
                                     onLoad={onDrawioLoad}
@@ -222,7 +220,6 @@ export default function Home() {
                                         saveAndExit: false,
                                         noExitBtn: true,
                                         dark: darkMode,
-                                        lang: currentLang,
                                     }}
                                 />
                             ) : (

app/api/chat/route.ts

@@ -12,11 +12,7 @@ import fs from "fs/promises"
 import { jsonrepair } from "jsonrepair"
 import path from "path"
 import { z } from "zod"
-import {
-    getAIModel,
-    supportsImageInput,
-    supportsPromptCaching,
-} from "@/lib/ai-providers"
+import { getAIModel, supportsPromptCaching } from "@/lib/ai-providers"
 import { findCachedResponse } from "@/lib/cached-responses"
 import {
     checkAndIncrementRequest,
@@ -299,17 +295,6 @@ async function handleChatRequest(req: Request): Promise<Response> {
         lastUserMessage?.parts?.filter((part: any) => part.type === "file") ||
         []
 
-    // Check if user is sending images to a model that doesn't support them
-    // AI SDK silently drops unsupported parts, so we need to catch this early
-    if (fileParts.length > 0 && !supportsImageInput(modelId)) {
-        return Response.json(
-            {
-                error: `The model "${modelId}" does not support image input. Please use a vision-capable model (e.g., GPT-4o, Claude, Gemini) or remove the image.`,
-            },
-            { status: 400 },
-        )
-    }
-
     // User input only - XML is now in a separate cached system message
     const formattedUserInput = `User input:
 """md

biome.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://biomejs.dev/schemas/2.3.10/schema.json",
+    "$schema": "https://biomejs.dev/schemas/2.3.8/schema.json",
     "vcs": {
         "enabled": true,
         "clientKind": "git",

components/chat-message-display.tsx

@@ -230,12 +230,6 @@ export function ChatMessageDisplay({
     const [expandedTools, setExpandedTools] = useState<Record<string, boolean>>(
         {},
     )
-    const [copiedToolCallId, setCopiedToolCallId] = useState<string | null>(
-        null,
-    )
-    const [copyFailedToolCallId, setCopyFailedToolCallId] = useState<
-        string | null
-    >(null)
     const [copiedMessageId, setCopiedMessageId] = useState<string | null>(null)
     const [copyFailedMessageId, setCopyFailedMessageId] = useState<
         string | null
@@ -251,39 +245,13 @@ export function ChatMessageDisplay({
         Record<string, boolean>
     >({})
 
-    const setCopyState = (
-        messageId: string,
-        isToolCall: boolean,
-        isSuccess: boolean,
-    ) => {
-        if (isSuccess) {
-            if (isToolCall) {
-                setCopiedToolCallId(messageId)
-                setTimeout(() => setCopiedToolCallId(null), 2000)
-            } else {
-                setCopiedMessageId(messageId)
-                setTimeout(() => setCopiedMessageId(null), 2000)
-            }
-        } else {
-            if (isToolCall) {
-                setCopyFailedToolCallId(messageId)
-                setTimeout(() => setCopyFailedToolCallId(null), 2000)
-            } else {
-                setCopyFailedMessageId(messageId)
-                setTimeout(() => setCopyFailedMessageId(null), 2000)
-            }
-        }
-    }
-
-    const copyMessageToClipboard = async (
-        messageId: string,
-        text: string,
-        isToolCall = false,
-    ) => {
+    const copyMessageToClipboard = async (messageId: string, text: string) => {
         try {
             await navigator.clipboard.writeText(text)
-            setCopyState(messageId, isToolCall, true)
-        } catch (_err) {
+
+            setCopiedMessageId(messageId)
+            setTimeout(() => setCopiedMessageId(null), 2000)
+        } catch (err) {
             // Fallback for non-secure contexts (HTTP) or permission denied
             const textarea = document.createElement("textarea")
             textarea.value = text
@@ -298,11 +266,13 @@ export function ChatMessageDisplay({
                 if (!success) {
                     throw new Error("Copy command failed")
                 }
-                setCopyState(messageId, isToolCall, true)
+                setCopiedMessageId(messageId)
+                setTimeout(() => setCopiedMessageId(null), 2000)
             } catch (fallbackErr) {
                 console.error("Failed to copy message:", fallbackErr)
                 toast.error(dict.chat.failedToCopyDetail)
-                setCopyState(messageId, isToolCall, false)
+                setCopyFailedMessageId(messageId)
+                setTimeout(() => setCopyFailedMessageId(null), 2000)
             } finally {
                 document.body.removeChild(textarea)
             }
@@ -671,7 +641,6 @@ export function ChatMessageDisplay({
         const { state, input, output } = part
         const isExpanded = expandedTools[callId] ?? true
         const toolName = part.type?.replace("tool-", "")
-        const isCopied = copiedToolCallId === callId
 
         const toggleExpanded = () => {
             setExpandedTools((prev) => ({
@@ -693,35 +662,6 @@ export function ChatMessageDisplay({
             }
         }
 
-        const handleCopy = () => {
-            let textToCopy = ""
-
-            if (input && typeof input === "object") {
-                if (input.xml) {
-                    textToCopy = input.xml
-                } else if (
-                    input.operations &&
-                    Array.isArray(input.operations)
-                ) {
-                    textToCopy = JSON.stringify(input.operations, null, 2)
-                } else if (Object.keys(input).length > 0) {
-                    textToCopy = JSON.stringify(input, null, 2)
-                }
-            }
-
-            if (
-                output &&
-                toolName === "get_shape_library" &&
-                typeof output === "string"
-            ) {
-                textToCopy = output
-            }
-
-            if (textToCopy) {
-                copyMessageToClipboard(callId, textToCopy, true)
-            }
-        }
-
         return (
             <div
                 key={callId}
@@ -741,32 +681,9 @@ export function ChatMessageDisplay({
                             <div className="h-4 w-4 border-2 border-primary border-t-transparent rounded-full animate-spin" />
                         )}
                         {state === "output-available" && (
-                            <>
-                                <span className="text-xs font-medium text-green-600 bg-green-50 px-2 py-0.5 rounded-full">
-                                    {dict.tools.complete}
-                                </span>
-                                {isExpanded && (
-                                    <button
-                                        type="button"
-                                        onClick={handleCopy}
-                                        className="p-1 rounded hover:bg-muted transition-colors"
-                                        title={
-                                            copiedToolCallId === callId
-                                                ? dict.chat.copied
-                                                : copyFailedToolCallId ===
-                                                    callId
-                                                  ? dict.chat.failedToCopy
-                                                  : dict.chat.copyResponse
-                                        }
-                                    >
-                                        {isCopied ? (
-                                            <Check className="w-4 h-4 text-green-600" />
-                                        ) : (
-                                            <Copy className="w-4 h-4 text-muted-foreground" />
-                                        )}
-                                    </button>
-                                )}
-                            </>
+                            <span className="text-xs font-medium text-green-600 bg-green-50 px-2 py-0.5 rounded-full">
+                                Complete
+                            </span>
                         )}
                         {state === "output-error" &&
                             (() => {

components/chat-panel.tsx

@@ -3,12 +3,14 @@
 import { useChat } from "@ai-sdk/react"
 import { DefaultChatTransport } from "ai"
 import {
+    AlertTriangle,
     MessageSquarePlus,
     PanelRightClose,
     PanelRightOpen,
     Settings,
 } from "lucide-react"
 import Image from "next/image"
+import Link from "next/link"
 import type React from "react"
 import { useCallback, useEffect, useRef, useState } from "react"
 import { flushSync } from "react-dom"
@@ -335,10 +337,7 @@ export default function ChatPanel({
                 }
 
                 // Translate image not supported error
-                if (
-                    friendlyMessage.includes("image content block") ||
-                    friendlyMessage.toLowerCase().includes("image_url")
-                ) {
+                if (friendlyMessage.includes("image content block")) {
                     friendlyMessage = "This model doesn't support image input."
                 }
 
@@ -905,6 +904,7 @@ export default function ChatPanel({
                     className="text-sm font-medium text-muted-foreground mt-8 tracking-wide"
                     style={{
                         writingMode: "vertical-rl",
+                        transform: "rotate(180deg)",
                     }}
                 >
                     {dict.nav.aiChat}
@@ -952,6 +952,32 @@ export default function ChatPanel({
                                 Next AI Drawio
                             </h1>
                         </div>
+                        {!isMobile && (
+                            <Link
+                                href="/about"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                                className="text-sm text-muted-foreground hover:text-foreground transition-colors ml-2"
+                            >
+                                {dict.nav.about}
+                            </Link>
+                        )}
+                        {!isMobile && (
+                            <Link
+                                href="/about"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                            >
+                                <ButtonWithTooltip
+                                    tooltipContent={dict.nav.sponsorTooltip}
+                                    variant="ghost"
+                                    size="icon"
+                                    className="h-6 w-6 text-amber-500 hover:text-amber-600"
+                                >
+                                    <AlertTriangle className="h-4 w-4" />
+                                </ButtonWithTooltip>
+                            </Link>
+                        )}
                     </div>
                     <div className="flex items-center gap-1 justify-end overflow-visible">
                         <ButtonWithTooltip

components/settings-dialog.tsx

@@ -395,13 +395,13 @@ function SettingsContent({
                         <>
                             <span className="text-muted-foreground">·</span>
                             <a
-                                href={`/${currentLang}/about${currentLang === "zh" ? "/cn" : currentLang === "ja" ? "/ja" : ""}`}
+                                href="/about"
                                 target="_blank"
                                 rel="noopener noreferrer"
                                 className="text-xs text-muted-foreground hover:text-foreground transition-colors flex items-center gap-1"
                             >
                                 <Info className="h-3 w-3" />
-                                {dict.nav.about}
+                                About
                             </a>
                         </>
                     )}

hooks/use-model-config.ts

@@ -11,6 +11,7 @@ import {
     flattenModels,
     type ModelConfig,
     type MultiModelConfig,
+    PROVIDER_INFO,
     type ProviderConfig,
     type ProviderName,
 } from "@/lib/types/model-config"

lib/ai-providers.ts

@@ -786,7 +786,7 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
                                                 `data: ${JSON.stringify(data)}\n\n`,
                                             ),
                                         )
-                                    } catch (_e) {
+                                    } catch (e) {
                                         // If parsing fails, forward the original message to avoid breaking the stream.
                                         controller.enqueue(
                                             new TextEncoder().encode(
@@ -906,34 +906,3 @@ export function supportsPromptCaching(modelId: string): boolean {
         modelId.startsWith("eu.anthropic")
     )
 }
-
-/**
- * Check if a model supports image/vision input.
- * Some models silently drop image parts without error (AI SDK warning only).
- */
-export function supportsImageInput(modelId: string): boolean {
-    const lowerModelId = modelId.toLowerCase()
-
-    // Helper to check if model has vision capability indicator
-    const hasVisionIndicator =
-        lowerModelId.includes("vision") || lowerModelId.includes("vl")
-
-    // Models that DON'T support image/vision input (unless vision variant)
-    // Kimi K2 models don't support images
-    if (lowerModelId.includes("kimi") && !hasVisionIndicator) {
-        return false
-    }
-
-    // DeepSeek text models (not vision variants)
-    if (lowerModelId.includes("deepseek") && !hasVisionIndicator) {
-        return false
-    }
-
-    // Qwen text models (not vision variants like qwen-vl)
-    if (lowerModelId.includes("qwen") && !hasVisionIndicator) {
-        return false
-    }
-
-    // Default: assume model supports images
-    return true
-}

lib/i18n/dictionaries/en.json

@@ -18,7 +18,8 @@
         "settings": "Settings",
         "hidePanel": "Hide chat panel (Ctrl+B)",
         "showPanel": "Show chat panel (Ctrl+B)",
-        "aiChat": "AI Chat"
+        "aiChat": "AI Chat",
+        "sponsorTooltip": "Sponsored by ByteDance Doubao K2-thinking. See About page for details."
     },
     "providers": {
         "useServerDefault": "Use Server Default",

lib/i18n/dictionaries/ja.json

@@ -18,7 +18,8 @@
         "settings": "設定",
         "hidePanel": "チャットパネルを非表示 (Ctrl+B)",
         "showPanel": "チャットパネルを表示 (Ctrl+B)",
-        "aiChat": "AI チャット"
+        "aiChat": "AI チャット",
+        "sponsorTooltip": "ByteDance Doubao K2-thinking によるスポンサー。詳細は概要ページをご覧ください。"
     },
     "providers": {
         "useServerDefault": "サーバーデフォルトを使用",

lib/i18n/dictionaries/zh.json

@@ -18,7 +18,8 @@
         "settings": "设置",
         "hidePanel": "隐藏聊天面板 (Ctrl+B)",
         "showPanel": "显示聊天面板 (Ctrl+B)",
-        "aiChat": "AI 聊天"
+        "aiChat": "AI 聊天",
+        "sponsorTooltip": "由字节跳动豆包 K2-thinking 赞助。详情请参阅关于页面。"
     },
     "providers": {
         "useServerDefault": "使用服务器默认值",

package-lock.json

@@ -93,11 +93,6 @@
                 "typescript": "^5",
                 "wait-on": "^9.0.3",
                 "wrangler": "4.54.0"
-            },
-            "optionalDependencies": {
-                "@tailwindcss/oxide-linux-x64-gnu": "^4.1.18",
-                "lightningcss": "^1.30.2",
-                "lightningcss-linux-x64-gnu": "^1.30.2"
             }
         },
         "node_modules/@acemir/cssom": {
@@ -8719,22 +8714,6 @@
                 "node": ">= 10"
             }
         },
-        "node_modules/@tailwindcss/oxide-linux-x64-gnu": {
-            "version": "4.1.18",
-            "resolved": "https://registry.npmjs.org/@tailwindcss/oxide-linux-x64-gnu/-/oxide-linux-x64-gnu-4.1.18.tgz",
-            "integrity": "sha512-v3gyT0ivkfBLoZGF9LyHmts0Isc8jHZyVcbzio6Wpzifg/+5ZJpDiRiUhDLkcr7f/r38SWNe7ucxmGW3j3Kb/g==",
-            "cpu": [
-                "x64"
-            ],
-            "license": "MIT",
-            "optional": true,
-            "os": [
-                "linux"
-            ],
-            "engines": {
-                "node": ">= 10"
-            }
-        },
         "node_modules/@tailwindcss/postcss": {
             "version": "4.1.18",
             "resolved": "https://registry.npmjs.org/@tailwindcss/postcss/-/postcss-4.1.18.tgz",
@@ -15143,7 +15122,7 @@
             "version": "1.30.2",
             "resolved": "https://registry.npmjs.org/lightningcss/-/lightningcss-1.30.2.tgz",
             "integrity": "sha512-utfs7Pr5uJyyvDETitgsaqSyjCb2qNRAtuqUeWIAKztsOYdcACf2KtARYXg2pSvhkt+9NfoaNY7fxjl6nuMjIQ==",
-            "devOptional": true,
+            "dev": true,
             "license": "MPL-2.0",
             "dependencies": {
                 "detect-libc": "^2.0.3"
@@ -15176,6 +15155,7 @@
             "cpu": [
                 "arm64"
             ],
+            "dev": true,
             "license": "MPL-2.0",
             "optional": true,
             "os": [
@@ -15189,26 +15169,6 @@
                 "url": "https://opencollective.com/parcel"
             }
         },
-        "node_modules/lightningcss-linux-x64-gnu": {
-            "version": "1.30.2",
-            "resolved": "https://registry.npmjs.org/lightningcss-linux-x64-gnu/-/lightningcss-linux-x64-gnu-1.30.2.tgz",
-            "integrity": "sha512-Cfd46gdmj1vQ+lR6VRTTadNHu6ALuw2pKR9lYq4FnhvgBc4zWY1EtZcAc6EffShbb1MFrIPfLDXD6Xprbnni4w==",
-            "cpu": [
-                "x64"
-            ],
-            "license": "MPL-2.0",
-            "optional": true,
-            "os": [
-                "linux"
-            ],
-            "engines": {
-                "node": ">= 12.0.0"
-            },
-            "funding": {
-                "type": "opencollective",
-                "url": "https://opencollective.com/parcel"
-            }
-        },
         "node_modules/lint-staged": {
             "version": "16.2.7",
             "resolved": "https://registry.npmjs.org/lint-staged/-/lint-staged-16.2.7.tgz",
@@ -18012,9 +17972,9 @@
             }
         },
         "node_modules/qs": {
-            "version": "6.14.1",
-            "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.1.tgz",
-            "integrity": "sha512-4EK3+xJl8Ts67nLYNwqw/dsFVnCf+qR7RgXSK9jEEm9unao3njwMDdmsdvoKBKHzxd7tCYz5e5M+SnMjdtXGQQ==",
+            "version": "6.14.0",
+            "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
+            "integrity": "sha512-YWWTjgABSKcvs/nWBi9PycY/JiPJqOD4JA6o9Sej2AtvSGarXxKC3OQSk4pAarbdQlKAh5D4FCQkJNkW+GAn3w==",
             "license": "BSD-3-Clause",
             "dependencies": {
                 "side-channel": "^1.1.0"

packages/mcp-server/package-lock.json

@@ -1,18 +1,18 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.1.11",
+    "version": "0.1.6",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@next-ai-drawio/mcp-server",
-            "version": "0.1.11",
+            "version": "0.1.6",
             "license": "Apache-2.0",
             "dependencies": {
                 "@modelcontextprotocol/sdk": "^1.0.4",
                 "linkedom": "^0.18.0",
                 "open": "^11.0.0",
-                "zod": "^4.0.0"
+                "zod": "^3.24.0"
             },
             "bin": {
                 "next-ai-drawio-mcp": "dist/index.js"
@@ -2051,9 +2051,9 @@
             }
         },
         "node_modules/zod": {
-            "version": "4.3.4",
-            "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.4.tgz",
-            "integrity": "sha512-Zw/uYiiyF6pUT1qmKbZziChgNPRu+ZRneAsMUDU6IwmXdWt5JwcUfy2bvLOCUtz5UniaN/Zx5aFttZYbYc7O/A==",
+            "version": "3.25.76",
+            "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+            "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
             "license": "MIT",
             "peer": true,
             "funding": {

packages/mcp-server/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.1.11",
+    "version": "0.1.10",
     "description": "MCP server for Next AI Draw.io - AI-powered diagram generation with real-time browser preview",
     "type": "module",
     "main": "dist/index.js",
@@ -39,7 +39,7 @@
         "@modelcontextprotocol/sdk": "^1.0.4",
         "linkedom": "^0.18.0",
         "open": "^11.0.0",
-        "zod": "^4.0.0"
+        "zod": "^3.24.0"
     },
     "devDependencies": {
         "@types/node": "^24.0.0",

packages/mcp-server/src/http-server.ts

@@ -127,12 +127,7 @@ function cleanupExpiredSessions(): void {
     }
 }
 
-const cleanupIntervalId = setInterval(cleanupExpiredSessions, 5 * 60 * 1000)
-
-export function shutdown(): void {
-    clearInterval(cleanupIntervalId)
-    stopHttpServer()
-}
+setInterval(cleanupExpiredSessions, 5 * 60 * 1000)
 
 export function getServerPort(): number {
     return serverPort

packages/mcp-server/src/index.ts

@@ -39,7 +39,6 @@ import {
     getState,
     requestSync,
     setState,
-    shutdown,
     startHttpServer,
     waitForSync,
 } from "./http-server.js"
@@ -48,7 +47,7 @@ import { validateAndFixXml } from "./xml-validation.js"
 
 // Server configuration
 const config = {
-    port: parseInt(process.env.PORT || "6002", 10),
+    port: parseInt(process.env.PORT || "6002"),
 }
 
 // Session state (single session for simplicity)
@@ -619,31 +618,6 @@ server.registerTool(
     },
 )
 
-// Graceful shutdown handler
-let isShuttingDown = false
-function gracefulShutdown(reason: string) {
-    if (isShuttingDown) return
-    isShuttingDown = true
-    log.info(`Shutting down: ${reason}`)
-    shutdown()
-    process.exit(0)
-}
-
-// Handle stdin close (primary method - works on all platforms including Windows)
-process.stdin.on("close", () => gracefulShutdown("stdin closed"))
-process.stdin.on("end", () => gracefulShutdown("stdin ended"))
-
-// Handle signals (may not work reliably on Windows)
-process.on("SIGINT", () => gracefulShutdown("SIGINT"))
-process.on("SIGTERM", () => gracefulShutdown("SIGTERM"))
-
-// Handle broken pipe (writing to closed stdout)
-process.stdout.on("error", (err) => {
-    if (err.code === "EPIPE" || err.code === "ERR_STREAM_DESTROYED") {
-        gracefulShutdown("stdout error")
-    }
-})
-
 // Start the MCP server
 async function main() {
     log.info("Starting MCP server for Next AI Draw.io (embedded mode)...")

scripts/electron-dev.mjs

@@ -253,7 +253,7 @@ async function main() {
                 },
             )
             console.log("👀 Watching for preset configuration changes...")
-        } catch (_err) {
+        } catch (err) {
             // File might not exist yet, that's ok
             setTimeout(setupConfigWatcher, 5000)
         }