chore: remove MCP preview labels

MCP server is no longer in preview. Remove "(Preview)" headings from
READMEs, the purple PREVIEW badge from the UI, and the preview i18n keys.

.github/workflows/electron-release.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Download draw.io static files for offline use
         run: |
           rm -rf public/drawio
-          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
+          git clone --depth 1 --branch v29.3.5 https://github.com/jgraph/drawio.git /tmp/drawio
           mkdir -p public/drawio
           cp -r /tmp/drawio/src/main/webapp/* public/drawio/
           rm -rf public/drawio/WEB-INF
@@ -70,7 +70,7 @@ jobs:
         shell: bash
         run: |
           rm -rf public/drawio
-          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
+          git clone --depth 1 --branch v29.3.5 https://github.com/jgraph/drawio.git /tmp/drawio
           mkdir -p public/drawio
           cp -r /tmp/drawio/src/main/webapp/* public/drawio/
           rm -rf public/drawio/WEB-INF

README.md

@@ -63,24 +63,24 @@ Here are some example prompts and their generated diagrams:
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>RAG Technique Diagram</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="./public/rag_prod.svg" alt="RAG Architecture Diagram" width="480" />
+      <strong>GCP architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a GCP architecture diagram with **GCP icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/gcp_demo.svg" alt="GCP Architecture Diagram" width="480" />
     </td>
     <td width="50%" valign="top">
-      <strong>Authentication using React and AWS</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="./public/auth.svg" alt="Authentication Architecture Diagram" width="480" />
+      <strong>AWS architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a AWS architecture diagram with **AWS icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/aws_demo.svg" alt="AWS Architecture Diagram" width="480" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>Open Innovation</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="./public/inno.svg" alt="Open Innovation Diagram" width="480" />
+      <strong>Azure architecture diagram</strong><br />
+      <p><strong>Prompt:</strong> Generate a Azure architecture diagram with **Azure icons**. In this diagram, users connect to a frontend hosted on an instance.</p>
+      <img src="./public/azure_demo.svg" alt="Azure Architecture Diagram" width="480" />
     </td>
     <td width="50%" valign="top">
-      <strong>Cat sketch</strong><br />
+      <strong>Cat sketch prompt</strong><br />
       <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
       <img src="./public/cat_demo.svg" alt="Cat Drawing" width="240" />
     </td>

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

@@ -175,109 +175,95 @@ export default function AboutCN() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                ResNet50模型架构动画
+                                动画Transformer连接器
                             </h3>
                             <p className="text-gray-600 mb-4">
-                                <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>提示词：</strong> 给我一个带有
+                                <strong>动画连接器</strong>的Transformer架构图。
                             </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
                             <Image
-                                    src="/resnet50.svg"
-                                    alt="ResNet50模型架构图"
+                                src="/animated_connectors.svg"
+                                alt="带动画连接器的Transformer架构"
                                 width={480}
                                 height={360}
                                 className="mx-auto"
                             />
                         </div>
-                        </div>
 
-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                         <div className="grid md:grid-cols-2 gap-6">
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG技术图
+                                    GCP架构图
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>提示词：</strong> 使用
+                                    <strong>GCP图标</strong>
+                                    生成一个GCP架构图。用户连接到托管在实例上的前端。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAG架构图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/gcp_demo.svg"
+                                    alt="GCP架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    React和AWS认证流程
+                                    AWS架构图
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>提示词：</strong> 使用
+                                    <strong>AWS图标</strong>
+                                    生成一个AWS架构图。用户连接到托管在实例上的前端。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/auth.svg"
-                                        alt="认证架构图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/aws_demo.svg"
+                                    alt="AWS架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    敏捷Scrum流程
+                                    Azure架构图
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>提示词：</strong> 使用
+                                    <strong>Azure图标</strong>
+                                    生成一个Azure架构图。用户连接到托管在实例上的前端。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/agile_scrum.svg"
-                                        alt="敏捷Scrum流程图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/azure_demo.svg"
+                                    alt="Azure架构图"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    开放式创新
+                                    猫咪素描
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>提示词：</strong>{" "}
+                                    给我画一只可爱的猫。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/inno.svg"
-                                        alt="开放式创新图"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/cat_demo.svg"
+                                    alt="猫咪绘图"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
                                 />
                             </div>
                         </div>
                     </div>
-                    </div>
 
                     {/* How It Works */}
                     <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">

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

@@ -168,109 +168,96 @@ export default function AboutJA() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                ResNet50モデルアーキテクチャアニメーション
+                                アニメーションTransformerコネクタ
                             </h3>
                             <p className="text-gray-600 mb-4">
-                                <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>プロンプト：</strong>{" "}
+                                <strong>アニメーションコネクタ</strong>
+                                付きのTransformerアーキテクチャ図を作成してください。
                             </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
                             <Image
-                                    src="/resnet50.svg"
-                                    alt="ResNet50モデルアーキテクチャ図"
+                                src="/animated_connectors.svg"
+                                alt="アニメーションコネクタ付きTransformerアーキテクチャ"
                                 width={480}
                                 height={360}
                                 className="mx-auto"
                             />
                         </div>
-                        </div>
 
-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                         <div className="grid md:grid-cols-2 gap-6">
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG技術ダイアグラム
+                                    GCPアーキテクチャ図
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>GCPアイコン</strong>
+                                    を使用してGCPアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAGアーキテクチャ図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/gcp_demo.svg"
+                                    alt="GCPアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    ReactとAWSによる認証
+                                    AWSアーキテクチャ図
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>AWSアイコン</strong>
+                                    を使用してAWSアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/auth.svg"
-                                        alt="認証アーキテクチャ図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/aws_demo.svg"
+                                    alt="AWSアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    アジャイルスクラムプロセス
+                                    Azureアーキテクチャ図
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>プロンプト：</strong>{" "}
+                                    <strong>Azureアイコン</strong>
+                                    を使用してAzureアーキテクチャ図を生成してください。ユーザーがインスタンス上でホストされているフロントエンドに接続します。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/agile_scrum.svg"
-                                        alt="アジャイルスクラム図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/azure_demo.svg"
+                                    alt="Azureアーキテクチャ図"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    オープンイノベーション
+                                    猫のスケッチ
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>プロンプト：</strong>{" "}
+                                    かわいい猫を描いてください。
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/inno.svg"
-                                        alt="オープンイノベーション図"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/cat_demo.svg"
+                                    alt="猫の絵"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
                                 />
                             </div>
                         </div>
                     </div>
-                    </div>
 
                     {/* How It Works */}
                     <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">

app/[lang]/about/page.tsx

@@ -182,109 +182,99 @@ export default function About() {
                     </p>
 
                     <div className="space-y-8">
-                        {/* ResNet50 Architecture */}
+                        {/* Animated Transformer */}
                         <div className="text-center">
                             <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                Animated ResNet50 Model Architecture
+                                Animated Transformer Connectors
                             </h3>
                             <p className="text-gray-600 mb-4">
                                 <strong>Prompt:</strong> Give me an{" "}
-                                <strong>animated</strong> architecture diagram
-                                of the ResNet50 model.
+                                <strong>animated connector</strong> diagram of
+                                transformer&apos;s architecture.
                             </p>
-                            <div className="bg-neutral-950 rounded-lg p-4 inline-block">
                             <Image
-                                    src="/resnet50.svg"
-                                    alt="Architecture diagram for ResNet50 model"
+                                src="/animated_connectors.svg"
+                                alt="Transformer Architecture with Animated Connectors"
                                 width={480}
                                 height={360}
                                 className="mx-auto"
                             />
                         </div>
-                        </div>
 
-                        {/* Diagram Grid */}
+                        {/* Cloud Architecture Grid */}
                         <div className="grid md:grid-cols-2 gap-6">
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    RAG Technique Diagram
+                                    GCP Architecture Diagram
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate a RAG
-                                    architecture diagram for{" "}
-                                    <strong>chat application</strong>. Use
-                                    connected diagram for data ingestion
+                                    <strong>Prompt:</strong> Generate a GCP
+                                    architecture diagram with{" "}
+                                    <strong>GCP icons</strong>. Users connect to
+                                    a frontend hosted on an instance.
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/rag_prod.svg"
-                                        alt="RAG Architecture Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/gcp_demo.svg"
+                                    alt="GCP Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Authentication using React and AWS
+                                    AWS Architecture Diagram
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate
-                                    authentication process using React with{" "}
-                                    <strong>AWS</strong>. Use Serverless
-                                    architecture.
+                                    <strong>Prompt:</strong> Generate an AWS
+                                    architecture diagram with{" "}
+                                    <strong>AWS icons</strong>. Users connect to
+                                    a frontend hosted on an instance.
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/auth.svg"
-                                        alt="Authentication Architecture Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/aws_demo.svg"
+                                    alt="AWS Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Agile Scrum Process
+                                    Azure Architecture Diagram
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Generate agile
-                                    scrum workflow diagram for software
-                                    development team.
+                                    <strong>Prompt:</strong> Generate an Azure
+                                    architecture diagram with{" "}
+                                    <strong>Azure icons</strong>. Users connect
+                                    to a frontend hosted on an instance.
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/agile_scrum.svg"
-                                        alt="Agile Scrum Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/azure_demo.svg"
+                                    alt="Azure Architecture Diagram"
+                                    width={400}
+                                    height={300}
+                                    className="mx-auto"
                                 />
                             </div>
-                            </div>
                             <div className="text-center">
                                 <h3 className="text-lg font-semibold text-gray-900 mb-2">
-                                    Open Innovation
+                                    Cat Sketch
                                 </h3>
                                 <p className="text-gray-600 text-sm mb-4">
-                                    <strong>Prompt:</strong> Create
-                                    visualization of Henry Chesbrough&apos;s
-                                    Open Innovation model.
+                                    <strong>Prompt:</strong> Draw a cute cat for
+                                    me.
                                 </p>
-                                <div className="bg-neutral-950 rounded-lg p-4 flex items-center justify-center w-full h-[400px]">
                                 <Image
-                                        src="/inno.svg"
-                                        alt="Open Innovation Diagram"
-                                        width={480}
-                                        height={360}
-                                        className="max-w-full max-h-full object-contain"
+                                    src="/cat_demo.svg"
+                                    alt="Cat Drawing"
+                                    width={240}
+                                    height={240}
+                                    className="mx-auto"
                                 />
                             </div>
                         </div>
                     </div>
-                    </div>
 
                     {/* How It Works */}
                     <h2 className="text-2xl font-semibold text-gray-900 mt-10 mb-4">

app/[lang]/page.tsx

@@ -10,8 +10,8 @@ import {
     ResizablePanelGroup,
 } from "@/components/ui/resizable"
 import { useDiagram } from "@/contexts/diagram-context"
-import { type DrawioTheme, isDrawioTheme } from "@/lib/drawio-themes"
 import { i18n, type Locale } from "@/lib/i18n/config"
+import { isIndexedDBUsable } from "@/lib/session-storage"
 
 export default function Home() {
     const {
@@ -27,11 +27,13 @@ export default function Home() {
     const currentLang = (pathname.split("/")[1] || i18n.defaultLocale) as Locale
     const [isMobile, setIsMobile] = useState(false)
     const [isChatVisible, setIsChatVisible] = useState(true)
-    const [drawioUi, setDrawioUi] = useState<DrawioTheme>("kennedy")
+    const [drawioUi, setDrawioUi] = useState<"min" | "sketch">("min")
     const [darkMode, setDarkMode] = useState(false)
     const [isLoaded, setIsLoaded] = useState(false)
     const [isDrawioReady, setIsDrawioReady] = useState(false)
     const [isElectron, setIsElectron] = useState(false)
+    const [canPersist, setCanPersist] = useState(false)
+    const [canPersistChecked, setCanPersistChecked] = useState(false)
     const [drawioBaseUrl, setDrawioBaseUrl] = useState(
         process.env.NEXT_PUBLIC_DRAWIO_BASE_URL || "https://embed.diagrams.net",
     )
@@ -54,7 +56,7 @@ export default function Home() {
         }
 
         const savedUi = localStorage.getItem("drawio-theme")
-        if (isDrawioTheme(savedUi)) {
+        if (savedUi === "min" || savedUi === "sketch") {
             setDrawioUi(savedUi)
         }
 
@@ -82,6 +84,11 @@ export default function Home() {
             setDrawioBaseUrl(`${window.location.origin}/drawio/index.html`)
         }
 
+        void (async () => {
+            const usable = await isIndexedDBUsable()
+            setCanPersist(usable)
+            setCanPersistChecked(true)
+        })()
         setIsLoaded(true)
     }, [pathname, router])
 
@@ -90,6 +97,17 @@ export default function Home() {
         onDrawioLoad()
     }, [onDrawioLoad])
 
+    const handleDrawioAutoSave = useCallback(
+        (data: { xml?: string }) => {
+            handleDiagramAutoSave(data)
+            // Only suppress modified state when persistence is available
+            if (canPersist) {
+                drawioRef.current?.status({ message: "", modified: false })
+            }
+        },
+        [canPersist, drawioRef, handleDiagramAutoSave],
+    )
+
     const handleDarkModeChange = () => {
         const newValue = !darkMode
         setDarkMode(newValue)
@@ -99,9 +117,10 @@ export default function Home() {
         resetDrawioReady()
     }
 
-    const handleDrawioUiChange = (theme: DrawioTheme) => {
-        localStorage.setItem("drawio-theme", theme)
-        setDrawioUi(theme)
+    const handleDrawioUiChange = () => {
+        const newUi = drawioUi === "min" ? "sketch" : "min"
+        localStorage.setItem("drawio-theme", newUi)
+        setDrawioUi(newUi)
         setIsDrawioReady(false)
         resetDrawioReady()
     }
@@ -172,7 +191,7 @@ export default function Home() {
                         }`}
                     >
                         <div className="h-full rounded-xl overflow-hidden shadow-soft-lg border border-border/30 relative">
-                            {isLoaded && (
+                            {isLoaded && canPersistChecked && (
                                 <div
                                     className={`h-full w-full ${isDrawioReady ? "" : "invisible absolute inset-0"}`}
                                 >
@@ -180,19 +199,28 @@ export default function Home() {
                                         key={`${drawioUi}-${darkMode}-${currentLang}-${isElectron}`}
                                         ref={drawioRef}
                                         autosave
-                                        onAutoSave={handleDiagramAutoSave}
+                                        onAutoSave={handleDrawioAutoSave}
                                         onExport={handleDiagramExport}
                                         onLoad={handleDrawioLoad}
                                         baseUrl={drawioBaseUrl}
+                                        configuration={
+                                            canPersist
+                                                ? { confirmExit: false }
+                                                : undefined
+                                        }
                                         urlParameters={{
                                             ui: drawioUi,
                                             spin: false,
                                             libraries: false,
+                                            // Disable modified tracking only when persistence is available
+                                            ...(canPersist && {
+                                                modified: false,
+                                                keepmodified: false,
+                                            }),
                                             saveAndExit: false,
                                             noSaveBtn: true,
                                             noExitBtn: true,
-                                            dark:
-                                                darkMode || drawioUi === "dark",
+                                            dark: darkMode,
                                             lang: currentLang,
                                             // Enable offline mode in Electron to disable external service calls
                                             ...(isElectron && {
@@ -240,7 +268,7 @@ export default function Home() {
                                 isVisible={isChatVisible}
                                 onToggleVisibility={toggleChatPanel}
                                 drawioUi={drawioUi}
-                                onDrawioUiChange={handleDrawioUiChange}
+                                onToggleDrawioUi={handleDrawioUiChange}
                                 darkMode={darkMode}
                                 onToggleDarkMode={handleDarkModeChange}
                                 isMobile={isMobile}

biome.json

@@ -1,5 +1,5 @@
 {
-    "$schema": "https://biomejs.dev/schemas/2.4.14/schema.json",
+    "$schema": "https://biomejs.dev/schemas/2.4.4/schema.json",
     "vcs": {
         "enabled": true,
         "clientKind": "git",

components/chat-message-display.tsx

@@ -417,7 +417,6 @@ export function ChatMessageDisplay({
 
     // Track previous message count to detect bulk loads vs streaming
     const prevMessageCountRef = useRef(0)
-    const scrollThrottleRef = useRef<ReturnType<typeof setTimeout> | null>(null)
 
     useEffect(() => {
         if (messagesEndRef.current && messages.length > 0) {
@@ -431,17 +430,8 @@ export function ChatMessageDisplay({
                 return
             }
 
-            // Throttle scroll during streaming to avoid layout thrashing
-            // Leading + trailing: scroll immediately, then once more after cooldown
-            if (!scrollThrottleRef.current) {
+            // Single message added - smooth scroll
             messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
-                scrollThrottleRef.current = setTimeout(() => {
-                    scrollThrottleRef.current = null
-                    messagesEndRef.current?.scrollIntoView({
-                        behavior: "smooth",
-                    })
-                }, 150)
-            }
         }
     }, [messages])
 

components/chat-panel.tsx

@@ -32,7 +32,6 @@ import { useSessionManager } from "@/hooks/use-session-manager"
 import { useValidateDiagram } from "@/hooks/use-validate-diagram"
 import { getApiEndpoint } from "@/lib/base-path"
 import { findCachedResponse } from "@/lib/cached-responses"
-import type { DrawioTheme } from "@/lib/drawio-themes"
 import { formatMessage } from "@/lib/i18n/utils"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
 import { sanitizeMessages } from "@/lib/session-storage"
@@ -69,8 +68,8 @@ interface ChatMessage {
 interface ChatPanelProps {
     isVisible: boolean
     onToggleVisibility: () => void
-    drawioUi: DrawioTheme
-    onDrawioUiChange: (theme: DrawioTheme) => void
+    drawioUi: "min" | "sketch"
+    onToggleDrawioUi: () => void
     darkMode: boolean
     onToggleDarkMode: () => void
     isMobile?: boolean
@@ -111,7 +110,7 @@ export default function ChatPanel({
     isVisible,
     onToggleVisibility,
     drawioUi,
-    onDrawioUiChange,
+    onToggleDrawioUi,
     darkMode,
     onToggleDarkMode,
     isMobile = false,
@@ -1443,7 +1442,7 @@ export default function ChatPanel({
                 open={showSettingsDialog}
                 onOpenChange={setShowSettingsDialog}
                 drawioUi={drawioUi}
-                onDrawioUiChange={onDrawioUiChange}
+                onToggleDrawioUi={onToggleDrawioUi}
                 darkMode={darkMode}
                 onToggleDarkMode={onToggleDarkMode}
                 minimalStyle={minimalStyle}

components/chat/ChatLobby.tsx

@@ -107,8 +107,8 @@ export function ChatLobby({
     currentInput = "",
     dict,
 }: ChatLobbyProps) {
-    const [templatesExpanded, setTemplatesExpanded] = useState(true)
-    const [examplesExpanded, setExamplesExpanded] = useState(true)
+    const [templatesExpanded, setTemplatesExpanded] = useState(false)
+    const [examplesExpanded, setExamplesExpanded] = useState(false)
     const [panelVisibility, setPanelVisibility] = useState(getPanelVisibility)
     const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
     const [sessionToDelete, setSessionToDelete] = useState<string | null>(null)
@@ -125,26 +125,20 @@ export function ChatLobby({
     const hasHistory = sessions.length > 0
 
     if (!hasHistory) {
-        if (!panelVisibility.myTemplates && !panelVisibility.quickExamples) {
-            return null
-        }
+        if (panelVisibility.myTemplates) {
             return (
-            <div className="animate-fade-in">
-                {panelVisibility.myTemplates && (
                 <TemplatePanel
                     setInput={setInput}
                     onSendTemplate={onSendTemplate}
                     currentInput={currentInput}
                 />
-                )}
-                {panelVisibility.quickExamples && (
-                    <div className={panelVisibility.myTemplates ? "mt-6" : ""}>
-                        <ExamplePanel setInput={setInput} setFiles={setFiles} />
-                    </div>
-                )}
-            </div>
             )
         }
+        if (panelVisibility.quickExamples) {
+            return <ExamplePanel setInput={setInput} setFiles={setFiles} />
+        }
+        return null
+    }
 
     // Show history + collapsible examples when there are sessions
     return (

components/chat/ToolCallCard.tsx

@@ -195,22 +195,7 @@ export function ToolCallCard({
             {input && isExpanded && (
                 <div className="px-4 py-3 border-t border-border/40 bg-muted/20">
                     {typeof input === "object" && input.xml ? (
-                        state === "input-streaming" ||
-                        state === "input-available" ? (
-                            <pre
-                                className="text-[11px] leading-relaxed overflow-x-auto overflow-y-auto max-h-48 scrollbar-thin break-all whitespace-pre-wrap"
-                                style={{
-                                    fontFamily:
-                                        "var(--font-mono), ui-monospace, monospace",
-                                    margin: 0,
-                                    padding: 0,
-                                }}
-                            >
-                                {input.xml}
-                            </pre>
-                        ) : (
                         <CodeBlock code={input.xml} language="xml" />
-                        )
                     ) : typeof input === "object" &&
                       input.operations &&
                       Array.isArray(input.operations) ? (

components/model-config-dialog.tsx

@@ -405,7 +405,7 @@ export function ModelConfigDialog({
                             </span>
                         </div>
 
-                        <ScrollArea className="flex-1 px-2 min-h-0">
+                        <ScrollArea className="flex-1 px-2">
                             <div className="space-y-1 pb-2">
                                 {config.providers.length === 0 ? (
                                     <div className="px-3 py-8 text-center">

components/settings-dialog.tsx

@@ -25,7 +25,6 @@ import { Switch } from "@/components/ui/switch"
 import { Textarea } from "@/components/ui/textarea"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getApiEndpoint } from "@/lib/base-path"
-import type { DrawioTheme } from "@/lib/drawio-themes"
 import { i18n, type Locale } from "@/lib/i18n/config"
 import { STORAGE_KEYS } from "@/lib/storage"
 
@@ -64,8 +63,8 @@ const LANGUAGE_LABELS: Record<Locale, string> = {
 interface SettingsDialogProps {
     open: boolean
     onOpenChange: (open: boolean) => void
-    drawioUi: DrawioTheme
-    onDrawioUiChange: (theme: DrawioTheme) => void
+    drawioUi: "min" | "sketch"
+    onToggleDrawioUi: () => void
     darkMode: boolean
     onToggleDarkMode: () => void
     minimalStyle?: boolean
@@ -91,7 +90,7 @@ function SettingsContent({
     open,
     onOpenChange,
     drawioUi,
-    onDrawioUiChange,
+    onToggleDrawioUi,
     darkMode,
     onToggleDarkMode,
     minimalStyle = false,
@@ -135,11 +134,8 @@ function SettingsContent({
     const [isApplyingProxy, setIsApplyingProxy] = useState(false)
 
     useEffect(() => {
-        // Re-fetch config whenever the dialog opens to ensure we always show
-        // the access code input if the server requires it. This fixes the case
-        // where a stale localStorage cache (from before ACCESS_CODE_LIST was
-        // configured) would hide the access code input.
-        if (!open) return
+        // Only fetch if not cached in localStorage
+        if (getStoredAccessCodeRequired() !== null) return
 
         fetch(getApiEndpoint("/api/config"))
             .then((res) => {
@@ -155,9 +151,10 @@ function SettingsContent({
                 setAccessCodeRequired(required)
             })
             .catch(() => {
-                // Keep existing cached value on error
+                // Don't cache on error - allow retry on next mount
+                setAccessCodeRequired(false)
             })
-    }, [open])
+    }, [])
 
     // Detect current language from pathname
     useEffect(() => {
@@ -433,40 +430,23 @@ function SettingsContent({
                     {/* Draw.io Style */}
                     <SettingItem
                         label={dict.settings.drawioStyle}
-                        description={dict.settings.drawioStyleDescription}
+                        description={`${dict.settings.drawioStyleDescription} ${
+                            drawioUi === "min"
+                                ? dict.settings.minimal
+                                : dict.settings.sketch
+                        }`}
                     >
-                        <Select
-                            value={drawioUi}
-                            onValueChange={(v) =>
-                                onDrawioUiChange(v as DrawioTheme)
-                            }
+                        <Button
+                            id="drawio-ui"
+                            variant="outline"
+                            onClick={onToggleDrawioUi}
+                            className="h-9 w-[120px] rounded-xl border-border-subtle hover:bg-interactive-hover font-normal"
                         >
-                            <SelectTrigger
-                                id="drawio-ui-select"
-                                aria-label={dict.settings.drawioStyle}
-                                className="w-[120px] h-9 rounded-xl"
-                            >
-                                <SelectValue />
-                            </SelectTrigger>
-                            <SelectContent>
-                                <SelectItem value="kennedy">
-                                    {dict.settings.themeDefault}
-                                </SelectItem>
-                                <SelectItem value="atlas">Atlas</SelectItem>
-                                <SelectItem value="dark">
-                                    {dict.settings.themeDark}
-                                </SelectItem>
-                                <SelectItem value="min">
-                                    {dict.settings.themeMinimal}
-                                </SelectItem>
-                                <SelectItem value="sketch">
-                                    {dict.settings.themeSketch}
-                                </SelectItem>
-                                <SelectItem value="simple">
-                                    {dict.settings.themeSimple}
-                                </SelectItem>
-                            </SelectContent>
-                        </Select>
+                            {dict.settings.switchTo}{" "}
+                            {drawioUi === "min"
+                                ? dict.settings.sketch
+                                : dict.settings.minimal}
+                        </Button>
                     </SettingItem>
 
                     {/* Diagram Style */}

docs/cn/README_CN.md

@@ -56,31 +56,31 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
   <tr>
     <td colspan="2" valign="top" align="center">
       <strong>动画Transformer连接器</strong><br />
-      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</p>
+      <p><strong>提示词：</strong> 给我一个带有**动画连接器**的Transformer架构图。</p>
       <img src="../../public/animated_connectors.svg" alt="带动画连接器的Transformer架构" width="480" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>RAG技术图</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="../../public/rag_prod.svg" alt="RAG架构图" width="480" />
+      <strong>GCP架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**GCP图标**生成一个GCP架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/gcp_demo.svg" alt="GCP架构图" width="480" />
     </td>
     <td width="50%" valign="top">
-      <strong>React和AWS认证流程</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="../../public/auth.svg" alt="认证架构图" width="480" />
+      <strong>AWS架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**AWS图标**生成一个AWS架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/aws_demo.svg" alt="AWS架构图" width="480" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>开放式创新</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="../../public/inno.svg" alt="开放式创新图" width="480" />
+      <strong>Azure架构图</strong><br />
+      <p><strong>提示词：</strong> 使用**Azure图标**生成一个Azure架构图。在这个图中，用户连接到托管在实例上的前端。</p>
+      <img src="../../public/azure_demo.svg" alt="Azure架构图" width="480" />
     </td>
     <td width="50%" valign="top">
       <strong>猫咪素描</strong><br />
-      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
+      <p><strong>提示词：</strong> 给我画一只可爱的猫。</p>
       <img src="../../public/cat_demo.svg" alt="猫咪绘图" width="240" />
     </td>
   </tr>

docs/ja/README_JA.md

@@ -54,31 +54,31 @@ https://github.com/user-attachments/assets/b2eef5f3-b335-4e71-a755-dc2e80931979
   <tr>
     <td colspan="2" valign="top" align="center">
       <strong>アニメーションTransformerコネクタ</strong><br />
-      <p><strong>Prompt:</strong> Give me a **animated connector** diagram of transformer's architecture.</p>
+      <p><strong>プロンプト：</strong> **アニメーションコネクタ**付きのTransformerアーキテクチャ図を作成してください。</p>
       <img src="../../public/animated_connectors.svg" alt="アニメーションコネクタ付きTransformerアーキテクチャ" width="480" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>RAG技術ダイアグラム</strong><br />
-      <p><strong>Prompt:</strong> Generate a RAG architecture diagram for **chat application**. Use connected diagram for data ingestion</p>
-      <img src="../../public/rag_prod.svg" alt="RAGアーキテクチャ図" width="480" />
+      <strong>GCPアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **GCPアイコン**を使用してGCPアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/gcp_demo.svg" alt="GCPアーキテクチャ図" width="480" />
     </td>
     <td width="50%" valign="top">
-      <strong>ReactとAWSによる認証</strong><br />
-      <p><strong>Prompt:</strong> Generate authentication process using React with **AWS**. Use Serverless architecture.</p>
-      <img src="../../public/auth.svg" alt="認証アーキテクチャ図" width="480" />
+      <strong>AWSアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **AWSアイコン**を使用してAWSアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/aws_demo.svg" alt="AWSアーキテクチャ図" width="480" />
     </td>
   </tr>
   <tr>
     <td width="50%" valign="top">
-      <strong>オープンイノベーション</strong><br />
-      <p><strong>Prompt:</strong> Create visualization of Henry Chesbrough's Open Innovation model.</p>
-      <img src="../../public/inno.svg" alt="オープンイノベーション図" width="480" />
+      <strong>Azureアーキテクチャ図</strong><br />
+      <p><strong>プロンプト：</strong> **Azureアイコン**を使用してAzureアーキテクチャ図を生成してください。この図では、ユーザーがインスタンス上でホストされているフロントエンドに接続します。</p>
+      <img src="../../public/azure_demo.svg" alt="Azureアーキテクチャ図" width="480" />
     </td>
     <td width="50%" valign="top">
       <strong>猫のスケッチ</strong><br />
-      <p><strong>Prompt:</strong> Draw a cute cat for me.</p>
+      <p><strong>プロンプト：</strong> かわいい猫を描いてください。</p>
       <img src="../../public/cat_demo.svg" alt="猫の絵" width="240" />
     </td>
   </tr>

electron/electron-builder.yml

@@ -95,10 +95,6 @@ linux:
       arch:
         - x64
         - arm64
-    - target: rpm
-      arch:
-        - x64
-        - arm64
 
 # Publish configuration (optional)
 publish:

electron/electron.d.ts

@@ -101,8 +101,8 @@ declare global {
 }
 
 export type {
-    ApplyPresetResult,
     ConfigPreset,
+    ApplyPresetResult,
     ProxyConfig,
     SetProxyResult,
     SetUserLocaleResult,

electron/main/window-manager.ts

@@ -60,13 +60,6 @@ export function createWindow(serverUrl: string): BrowserWindow {
         mainWindow.webContents.openDevTools()
     }
 
-    // Override the draw.io iframe's beforeunload handler so the window can
-    // close after the user edits text in a shape (fixes #815). Diagrams are
-    // already persisted via autosave, so the prompt is unnecessary.
-    mainWindow.webContents.on("will-prevent-unload", (event) => {
-        event.preventDefault()
-    })
-
     mainWindow.on("closed", () => {
         mainWindow = null
     })

lib/ai-providers.ts

@@ -1262,6 +1262,7 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
         case "glm":
         case "qwen":
         case "qiniu":
+        case "kimi":
         case "novita": {
             const envVar = PROVIDER_ENV_VARS[provider]
             if (!envVar) {
@@ -1287,23 +1288,6 @@ export function getAIModel(overrides?: ClientOverrides): ModelConfig {
             break
         }
 
-        case "kimi": {
-            const apiKey = resolveApiKey(overrides, "KIMI_API_KEY")
-            const baseURL = resolveBaseURL(
-                overrides?.apiKey,
-                overrides?.baseUrl,
-                resolveBaseUrlEnv(overrides, "KIMI_BASE_URL"),
-                PROVIDER_INFO["kimi"]?.defaultBaseUrl,
-            )
-            // Use createDeepSeek to properly handle reasoning_content for Kimi
-            // thinking models (e.g., kimi-k2.6). Kimi's API uses the same
-            // reasoning_content field as DeepSeek, so this provider correctly
-            // captures and replays reasoning in multi-turn conversations.
-            const customProvider = createDeepSeek({ apiKey, baseURL })
-            model = customProvider(modelId)
-            break
-        }
-
         default:
             throw new Error(
                 `Unknown AI provider: ${provider}. Supported providers: bedrock, openai, anthropic, google, azure, ollama, openrouter, deepseek, siliconflow, sglang, gateway, edgeone, doubao, modelscope, glm, qwen, qiniu, kimi, minimax, novita`,
@@ -1372,13 +1356,12 @@ export function supportsImageInput(modelId: string): boolean {
     }
 
     // Qwen text models (not vision variants like qwen-vl)
-    // Qwen3.5 series (qwen3.5, qwen3.5-plus, qwen3.5-flash) natively support image input
-    // QvQ (Qwen Visual QA) models are vision models — exclude them even when prefixed with "qwen/"
+    // qwen3.5-plus is a vision model
     if (
         lowerModelId.includes("qwen") &&
         !hasVisionIndicator &&
-        !lowerModelId.includes("qwen3.5") &&
-        !lowerModelId.includes("qvq")
+        !lowerModelId.includes("qwen3.5-plus") &&
+        !lowerModelId.includes("qwen3.5-flash")
     ) {
         return false
     }

lib/drawio-themes.ts

@@ -1,17 +0,0 @@
-export const DRAWIO_THEMES = [
-    "kennedy",
-    "atlas",
-    "dark",
-    "min",
-    "sketch",
-    "simple",
-] as const
-
-export type DrawioTheme = (typeof DRAWIO_THEMES)[number]
-
-export function isDrawioTheme(value: unknown): value is DrawioTheme {
-    return (
-        typeof value === "string" &&
-        (DRAWIO_THEMES as readonly string[]).includes(value)
-    )
-}

lib/i18n/dictionaries/en.json

@@ -102,12 +102,10 @@
         "theme": "Theme",
         "themeDescription": "Dark/Light mode for interface and DrawIO canvas.",
         "drawioStyle": "DrawIO Style",
-        "drawioStyleDescription": "Canvas style",
-        "themeDefault": "Default",
-        "themeDark": "Dark",
-        "themeMinimal": "Minimal",
-        "themeSketch": "Sketch",
-        "themeSimple": "Simple",
+        "drawioStyleDescription": "Canvas style:",
+        "switchTo": "Switch to",
+        "minimal": "Minimal",
+        "sketch": "Sketch",
         "diagramStyle": "Diagram Style",
         "diagramStyleDescription": "Toggle between minimal and styled diagram output.",
         "sendShortcut": "Send Shortcut",

lib/i18n/dictionaries/ja.json

@@ -102,12 +102,10 @@
         "theme": "テーマ",
         "themeDescription": "インターフェースと DrawIO キャンバスのダーク/ライトモード。",
         "drawioStyle": "DrawIO スタイル",
-        "drawioStyleDescription": "キャンバススタイル",
-        "themeDefault": "デフォルト",
-        "themeDark": "ダーク",
-        "themeMinimal": "ミニマル",
-        "themeSketch": "スケッチ",
-        "themeSimple": "シンプル",
+        "drawioStyleDescription": "キャンバススタイル：",
+        "switchTo": "切り替え",
+        "minimal": "ミニマル",
+        "sketch": "スケッチ",
         "diagramStyle": "ダイアグラムスタイル",
         "diagramStyleDescription": "ミニマルとスタイル付きの出力を切り替えます。",
         "sendShortcut": "送信ショートカット",

lib/i18n/dictionaries/zh-Hant.json

@@ -102,12 +102,10 @@
         "theme": "主題",
         "themeDescription": "介面和 DrawIO 畫布的深色/淺色模式。",
         "drawioStyle": "DrawIO 樣式",
-        "drawioStyleDescription": "畫布樣式",
-        "themeDefault": "預設",
-        "themeDark": "深色",
-        "themeMinimal": "簡約",
-        "themeSketch": "草圖",
-        "themeSimple": "簡單",
+        "drawioStyleDescription": "畫布樣式：",
+        "switchTo": "切換到",
+        "minimal": "簡約",
+        "sketch": "草圖",
         "diagramStyle": "圖表樣式",
         "diagramStyleDescription": "切換簡約與精緻圖表輸出模式。",
         "sendShortcut": "傳送快捷鍵",

lib/i18n/dictionaries/zh.json

@@ -102,12 +102,10 @@
         "theme": "主题",
         "themeDescription": "界面和 DrawIO 画布的深色/浅色模式。",
         "drawioStyle": "DrawIO 样式",
-        "drawioStyleDescription": "画布样式",
-        "themeDefault": "默认",
-        "themeDark": "深色",
-        "themeMinimal": "简约",
-        "themeSketch": "草图",
-        "themeSimple": "简单",
+        "drawioStyleDescription": "画布样式：",
+        "switchTo": "切换到",
+        "minimal": "简约",
+        "sketch": "草图",
         "diagramStyle": "图表样式",
         "diagramStyleDescription": "切换简约与精致图表输出模式。",
         "sendShortcut": "发送快捷键",

lib/session-storage.ts

@@ -58,6 +58,33 @@ interface ChatSessionDB extends DBSchema {
 
 // Database singleton
 let dbPromise: Promise<IDBPDatabase<ChatSessionDB>> | null = null
+const resetDBPromise = () => {
+    dbPromise = null
+}
+
+const isClosingError = (error: unknown): boolean => {
+    return (
+        error instanceof DOMException &&
+        error.name === "InvalidStateError" &&
+        /closing/i.test(error.message)
+    )
+}
+
+const withDB = async <T>(
+    action: (db: IDBPDatabase<ChatSessionDB>) => Promise<T>,
+): Promise<T> => {
+    try {
+        const db = await getDB()
+        return await action(db)
+    } catch (error) {
+        if (isClosingError(error)) {
+            resetDBPromise()
+            const db = await getDB()
+            return await action(db)
+        }
+        throw error
+    }
+}
 
 async function getDB(): Promise<IDBPDatabase<ChatSessionDB>> {
     if (!dbPromise) {
@@ -88,6 +115,22 @@ async function getDB(): Promise<IDBPDatabase<ChatSessionDB>> {
                     }
                 }
             },
+            terminated() {
+                resetDBPromise()
+            },
+        })
+        dbPromise
+            .then((db) => {
+                db.onversionchange = () => {
+                    db.close()
+                    resetDBPromise()
+                }
+                db.onclose = () => {
+                    resetDBPromise()
+                }
+            })
+            .catch(() => {
+                resetDBPromise()
             })
     }
     return dbPromise
@@ -103,11 +146,24 @@ export function isIndexedDBAvailable(): boolean {
     }
 }
 
+// Check if IndexedDB is actually usable (not just present).
+// Note: Do NOT close the db here - getDB() returns a shared singleton connection
+// that other code depends on.
+export async function isIndexedDBUsable(): Promise<boolean> {
+    if (!isIndexedDBAvailable()) return false
+    try {
+        await getDB()
+        return true
+    } catch {
+        return false
+    }
+}
+
 // CRUD Operations
 export async function getAllSessionMetadata(): Promise<SessionMetadata[]> {
     if (!isIndexedDBAvailable()) return []
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             const tx = db.transaction(STORE_NAME, "readonly")
             const index = tx.store.index("by-updated")
             const metadata: SessionMetadata[] = []
@@ -122,12 +178,14 @@ export async function getAllSessionMetadata(): Promise<SessionMetadata[]> {
                     createdAt: s.createdAt,
                     updatedAt: s.updatedAt,
                     messageCount: s.messages.length,
-                hasDiagram: !!s.diagramXml && s.diagramXml.trim().length > 0,
+                    hasDiagram:
+                        !!s.diagramXml && s.diagramXml.trim().length > 0,
                     thumbnailDataUrl: s.thumbnailDataUrl,
                 })
                 cursor = await cursor.continue()
             }
             return metadata
+        })
     } catch (error) {
         console.error("Failed to get session metadata:", error)
         return []
@@ -137,8 +195,9 @@ export async function getAllSessionMetadata(): Promise<SessionMetadata[]> {
 export async function getSession(id: string): Promise<ChatSession | null> {
     if (!isIndexedDBAvailable()) return null
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             return (await db.get(STORE_NAME, id)) || null
+        })
     } catch (error) {
         console.error("Failed to get session:", error)
         return null
@@ -148,8 +207,9 @@ export async function getSession(id: string): Promise<ChatSession | null> {
 export async function saveSession(session: ChatSession): Promise<boolean> {
     if (!isIndexedDBAvailable()) return false
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             await db.put(STORE_NAME, session)
+        })
         return true
     } catch (error) {
         // Handle quota exceeded
@@ -161,8 +221,9 @@ export async function saveSession(session: ChatSession): Promise<boolean> {
             await deleteOldestSession()
             // Retry once
             try {
-                const db = await getDB()
+                await withDB(async (db) => {
                     await db.put(STORE_NAME, session)
+                })
                 return true
             } catch (retryError) {
                 console.error(
@@ -181,8 +242,9 @@ export async function saveSession(session: ChatSession): Promise<boolean> {
 export async function deleteSession(id: string): Promise<void> {
     if (!isIndexedDBAvailable()) return
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             await db.delete(STORE_NAME, id)
+        })
     } catch (error) {
         console.error("Failed to delete session:", error)
     }
@@ -191,8 +253,9 @@ export async function deleteSession(id: string): Promise<void> {
 export async function getSessionCount(): Promise<number> {
     if (!isIndexedDBAvailable()) return 0
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             return await db.count(STORE_NAME)
+        })
     } catch (error) {
         console.error("Failed to get session count:", error)
         return 0
@@ -202,7 +265,7 @@ export async function getSessionCount(): Promise<number> {
 export async function deleteOldestSession(): Promise<void> {
     if (!isIndexedDBAvailable()) return
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             const tx = db.transaction(STORE_NAME, "readwrite")
             const index = tx.store.index("by-updated")
             const cursor = await index.openCursor()
@@ -210,6 +273,7 @@ export async function deleteOldestSession(): Promise<void> {
                 await cursor.delete()
             }
             await tx.done
+        })
     } catch (error) {
         console.error("Failed to delete oldest session:", error)
     }

lib/template-storage.ts

@@ -57,6 +57,33 @@ export function generateDefaultTitle(prompt: string): string {
 
 // Database singleton
 let dbPromise: Promise<IDBPDatabase<TemplateDB>> | null = null
+const resetDBPromise = () => {
+    dbPromise = null
+}
+
+const isClosingError = (error: unknown): boolean => {
+    return (
+        error instanceof DOMException &&
+        error.name === "InvalidStateError" &&
+        /closing/i.test(error.message)
+    )
+}
+
+const withDB = async <T>(
+    action: (db: IDBPDatabase<TemplateDB>) => Promise<T>,
+): Promise<T> => {
+    try {
+        const db = await getDB()
+        return await action(db)
+    } catch (error) {
+        if (isClosingError(error)) {
+            resetDBPromise()
+            const db = await getDB()
+            return await action(db)
+        }
+        throw error
+    }
+}
 
 async function getDB(): Promise<IDBPDatabase<TemplateDB>> {
     if (!dbPromise) {
@@ -74,6 +101,22 @@ async function getDB(): Promise<IDBPDatabase<TemplateDB>> {
                     }
                 }
             },
+            terminated() {
+                resetDBPromise()
+            },
+        })
+        dbPromise
+            .then((db) => {
+                db.onversionchange = () => {
+                    db.close()
+                    resetDBPromise()
+                }
+                db.onclose = () => {
+                    resetDBPromise()
+                }
+            })
+            .catch(() => {
+                resetDBPromise()
             })
     }
     return dbPromise
@@ -94,9 +137,10 @@ export function isIndexedDBAvailable(): boolean {
 export async function getAllTemplates(): Promise<Template[]> {
     if (!isIndexedDBAvailable()) return []
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             const templates = await db.getAll(STORE_NAME)
             return sortTemplates(templates)
+        })
     } catch (error) {
         console.error("Failed to get templates:", error)
         return []
@@ -106,8 +150,9 @@ export async function getAllTemplates(): Promise<Template[]> {
 export async function getTemplate(id: string): Promise<Template | null> {
     if (!isIndexedDBAvailable()) return null
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             return (await db.get(STORE_NAME, id)) || null
+        })
     } catch (error) {
         console.error("Failed to get template:", error)
         return null
@@ -137,8 +182,9 @@ export async function createTemplate(
     }
 
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             await db.put(STORE_NAME, template)
+        })
         return template
     } catch (error) {
         console.error("Failed to create template:", error)
@@ -152,7 +198,7 @@ export async function updateTemplate(
 ): Promise<Template | null> {
     if (!isIndexedDBAvailable()) return null
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             const existing = await db.get(STORE_NAME, id)
             if (!existing) return null
 
@@ -165,6 +211,7 @@ export async function updateTemplate(
             }
             await db.put(STORE_NAME, updated)
             return updated
+        })
     } catch (error) {
         console.error("Failed to update template:", error)
         return null
@@ -174,8 +221,9 @@ export async function updateTemplate(
 export async function deleteTemplate(id: string): Promise<boolean> {
     if (!isIndexedDBAvailable()) return false
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             await db.delete(STORE_NAME, id)
+        })
         return true
     } catch (error) {
         console.error("Failed to delete template:", error)
@@ -189,7 +237,7 @@ export async function duplicateTemplate(
 ): Promise<Template | null> {
     if (!isIndexedDBAvailable()) return null
     try {
-        const db = await getDB()
+        return await withDB(async (db) => {
             const existing = await db.get(STORE_NAME, id)
             if (!existing) return null
 
@@ -207,6 +255,7 @@ export async function duplicateTemplate(
             }
             await db.put(STORE_NAME, duplicate)
             return duplicate
+        })
     } catch (error) {
         console.error("Failed to duplicate template:", error)
         return null
@@ -218,12 +267,13 @@ export async function duplicateTemplate(
 export async function incrementClickCount(id: string): Promise<void> {
     if (!isIndexedDBAvailable()) return
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             const template = await db.get(STORE_NAME, id)
             if (!template) return
             template.clickCount += 1
             template.updatedAt = Date.now()
             await db.put(STORE_NAME, template)
+        })
     } catch (error) {
         console.error("Failed to increment click count:", error)
     }
@@ -232,7 +282,7 @@ export async function incrementClickCount(id: string): Promise<void> {
 export async function incrementRunCount(id: string): Promise<void> {
     if (!isIndexedDBAvailable()) return
     try {
-        const db = await getDB()
+        await withDB(async (db) => {
             const template = await db.get(STORE_NAME, id)
             if (!template) return
             const now = Date.now()
@@ -240,6 +290,7 @@ export async function incrementRunCount(id: string): Promise<void> {
             template.lastUsedAt = now
             template.updatedAt = now
             await db.put(STORE_NAME, template)
+        })
     } catch (error) {
         console.error("Failed to increment run count:", error)
     }
@@ -372,8 +423,9 @@ export async function importTemplates(
             pinned: typeof t.pinned === "boolean" ? t.pinned : false,
         }
         try {
-            const db = await getDB()
+            await withDB(async (db) => {
                 await db.put(STORE_NAME, newTemplate)
+            })
             existingKeys.add(key)
             imported++
         } catch (error) {

package.json

@@ -1,6 +1,6 @@
 {
     "name": "next-ai-draw-io",
-    "version": "0.4.16",
+    "version": "0.4.14",
     "license": "Apache-2.0",
     "private": true,
     "main": "dist-electron/main/index.js",
@@ -49,9 +49,9 @@
         "@langfuse/tracing": "^4.4.9",
         "@next/third-parties": "^16.0.6",
         "@opennextjs/cloudflare": "^1.17.1",
-        "@openrouter/ai-sdk-provider": "^2.0.0",
+        "@openrouter/ai-sdk-provider": "^1.5.4",
         "@opentelemetry/api": "^1.9.0",
-        "@opentelemetry/exporter-trace-otlp-http": "^0.216.0",
+        "@opentelemetry/exporter-trace-otlp-http": "^0.214.0",
         "@opentelemetry/sdk-trace-node": "^2.2.0",
         "@radix-ui/react-alert-dialog": "^1.1.15",
         "@radix-ui/react-collapsible": "^1.1.12",
@@ -77,7 +77,7 @@
         "nanoid": "^5.0.0",
         "negotiator": "^1.0.0",
         "next": "^16.0.7",
-        "ollama-ai-provider-v2": "^3.0.0",
+        "ollama-ai-provider-v2": "^2.0.0",
         "pako": "^2.1.0",
         "prism-react-renderer": "^2.4.1",
         "react": "^19.1.2",
@@ -108,7 +108,7 @@
     },
     "devDependencies": {
         "@anthropic-ai/tokenizer": "^0.0.4",
-        "@biomejs/biome": "2.4.13",
+        "@biomejs/biome": "2.4.10",
         "@playwright/test": "^1.57.0",
         "@tailwindcss/postcss": "^4",
         "@tailwindcss/typography": "^0.5.19",
@@ -127,7 +127,7 @@
         "cross-env": "^10.1.0",
         "electron": "^39.2.7",
         "electron-builder": "^26.0.12",
-        "esbuild": "^0.28.0",
+        "esbuild": "^0.27.2",
         "eslint": "9.39.4",
         "eslint-config-next": "16.1.6",
         "husky": "^9.1.7",

packages/mcp-server/package-lock.json

@@ -1,12 +1,12 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.2.0",
+    "version": "0.1.17",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@next-ai-drawio/mcp-server",
-            "version": "0.2.0",
+            "version": "0.1.17",
             "license": "Apache-2.0",
             "dependencies": {
                 "@modelcontextprotocol/sdk": "^1.0.4",
@@ -521,9 +521,9 @@
             }
         },
         "node_modules/@types/node": {
-            "version": "24.12.2",
-            "resolved": "https://registry.npmjs.org/@types/node/-/node-24.12.2.tgz",
-            "integrity": "sha512-A1sre26ke7HDIuY/M23nd9gfB+nrmhtYyMINbjI1zHJxYteKR6qSMX56FsmjMcDb3SMcjJg5BiRRgOCC/yBD0g==",
+            "version": "24.12.0",
+            "resolved": "https://registry.npmjs.org/@types/node/-/node-24.12.0.tgz",
+            "integrity": "sha512-GYDxsZi3ChgmckRT9HPU0WEhKLP08ev/Yfcq2AstjrDASOYCSXeyjDsHg4v5t4jOj7cyDX3vmprafKlWIG9MXQ==",
             "dev": true,
             "license": "MIT",
             "dependencies": {
@@ -2062,9 +2062,9 @@
             }
         },
         "node_modules/zod": {
-            "version": "4.4.1",
-            "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.1.tgz",
-            "integrity": "sha512-a6ENMBBGZBsnlSebQ/eKCguSBeGKSf4O7BPnqVPmYGtpBYI7VSqoVqw+QcB7kPRjbqPwhYTpFbVj/RqNz/CT0Q==",
+            "version": "4.3.6",
+            "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
+            "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
             "license": "MIT",
             "funding": {
                 "url": "https://github.com/sponsors/colinhacks"

packages/mcp-server/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.2.0",
+    "version": "0.1.18",
     "description": "MCP server for Next AI Draw.io - AI-powered diagram generation with real-time browser preview",
     "type": "module",
     "main": "dist/index.js",

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

@@ -4,29 +4,6 @@
  */
 
 import http from "node:http"
-
-const MAX_BODY_BYTES = 10 * 1024 * 1024 // 10 MiB
-
-function readBody(
-    req: http.IncomingMessage,
-    res: http.ServerResponse,
-    cb: (body: string) => void,
-): void {
-    let body = ""
-    let size = 0
-    req.on("data", (chunk: Buffer) => {
-        size += chunk.length
-        if (size > MAX_BODY_BYTES) {
-            res.writeHead(413, { "Content-Type": "application/json" })
-            res.end(JSON.stringify({ error: "Payload too large" }))
-            req.destroy()
-            return
-        }
-        body += chunk
-    })
-    req.on("end", () => cb(body))
-}
-
 import {
     addHistory,
     clearHistory,
@@ -289,7 +266,11 @@ function handleStateApi(
             }),
         )
     } else if (req.method === "POST") {
-        readBody(req, res, (body) => {
+        let body = ""
+        req.on("data", (chunk) => {
+            body += chunk
+        })
+        req.on("end", () => {
             try {
                 const data = JSON.parse(body)
                 const { sessionId } = data
@@ -366,7 +347,11 @@ function handleRestoreApi(
         return
     }
 
-    readBody(req, res, (body) => {
+    let body = ""
+    req.on("data", (chunk) => {
+        body += chunk
+    })
+    req.on("end", () => {
         try {
             const { sessionId, index } = JSON.parse(body)
             if (!sessionId || index === undefined) {
@@ -408,7 +393,11 @@ function handleHistorySvgApi(
         return
     }
 
-    readBody(req, res, (body) => {
+    let body = ""
+    req.on("data", (chunk) => {
+        body += chunk
+    })
+    req.on("end", () => {
         try {
             const { sessionId, svg } = JSON.parse(body)
             if (!sessionId || !svg) {

packages/mcp-server/src/index.ts

@@ -155,22 +155,19 @@ server.registerTool(
 server.registerTool(
     "create_new_diagram",
     {
-        description: `Create a NEW diagram from mxGraphModel XML. ONLY use this when creating a diagram from scratch.
-
-⚠️ DO NOT use this tool to modify an existing diagram — it will DESTROY all existing content and user changes. Use edit_diagram instead for ANY modifications to an existing diagram.
+        description: `Create a NEW diagram from mxGraphModel XML. Use this when creating a diagram from scratch or replacing the current diagram entirely.
 
 CRITICAL: You MUST provide the 'xml' argument in EVERY call. Do NOT call this tool without xml.
 
 When to use this tool:
-- Creating a new diagram from scratch (no existing diagram)
-- The user explicitly asks to "start over" or "create a new diagram"
+- Creating a new diagram from scratch
+- Replacing the current diagram with a completely different one
+- Major structural changes that require regenerating the diagram
 
-When to use edit_diagram instead (ALWAYS prefer edit_diagram if a diagram already exists):
-- ANY modifications to an existing diagram
-- Adding/removing/moving elements
-- Changing labels, colors, styles, or positions
-- Restructuring or reorganizing existing content
-- Adding new elements to an existing diagram
+When to use edit_diagram instead:
+- Small modifications to existing diagram
+- Adding/removing individual elements
+- Changing labels, colors, or positions
 
 XML FORMAT - Full mxGraphModel structure:
 <mxGraphModel>

packages/mcp-server/tsconfig.json

@@ -12,8 +12,7 @@
         "declaration": true,
         "declarationMap": true,
         "sourceMap": true,
-        "resolveJsonModule": true,
-        "types": ["node"]
+        "resolveJsonModule": true
     },
     "include": ["src/**/*"],
     "exclude": ["node_modules", "dist"]

tests/e2e/iframe-interaction.spec.ts

@@ -35,10 +35,8 @@ test.describe("Iframe Interaction", () => {
         await expect(
             frame
                 .locator('text="Diagram"')
-                .or(frame.locator('[title*="Diagram"]'))
-                .filter({ visible: true })
-                .first(),
-        ).toBeVisible({ timeout: 30000 })
+                .or(frame.locator('[title*="Diagram"]')),
+        ).toBeVisible({ timeout: 10000 })
     })
 
     test("diagram XML is rendered in iframe after generation", async ({

tests/unit/ai-providers.test.ts

@@ -200,21 +200,12 @@ describe("supportsImageInput", () => {
 
     it("returns true for Qwen vision models", () => {
         expect(supportsImageInput("qwen-vl")).toBe(true)
-        expect(supportsImageInput("Qwen3.5")).toBe(true)
-        expect(supportsImageInput("qwen3.5")).toBe(true)
         expect(supportsImageInput("qwen3.5-plus")).toBe(true)
         expect(supportsImageInput("qwen3.5-flash")).toBe(true)
         expect(supportsImageInput("qwen3-vl-plus")).toBe(true)
         expect(supportsImageInput("qwen3-vl-flash")).toBe(true)
     })
 
-    it("returns true for QvQ (Qwen Visual QA) models including OpenRouter-prefixed names", () => {
-        expect(supportsImageInput("qvq-72b-preview")).toBe(true)
-        expect(supportsImageInput("qvq-max")).toBe(true)
-        expect(supportsImageInput("qwen/qvq-72b-preview")).toBe(true)
-        expect(supportsImageInput("qwen/qvq-max")).toBe(true)
-    })
-
     it("returns false for GLM text models", () => {
         expect(supportsImageInput("glm-4")).toBe(false)
         expect(supportsImageInput("glm-4-plus")).toBe(false)
@@ -245,67 +236,6 @@ vi.mock("ollama-ai-provider-v2", () => {
     return { createOllama: mockCreateOllama, ollama: mockOllama }
 })
 
-vi.mock("@ai-sdk/deepseek", () => {
-    const mockModel = { modelId: "test-model" }
-    const mockProviderFn = vi.fn(() => mockModel)
-    const mockCreateDeepSeek = vi.fn(() => mockProviderFn)
-    const mockDeepseek = vi.fn(() => mockModel)
-    return { createDeepSeek: mockCreateDeepSeek, deepseek: mockDeepseek }
-})
-
-describe("Kimi provider uses createDeepSeek for reasoning_content support", () => {
-    let createDeepSeekMock: ReturnType<typeof vi.fn>
-    const savedEnv: Record<string, string | undefined> = {}
-
-    beforeEach(async () => {
-        savedEnv.KIMI_API_KEY = process.env.KIMI_API_KEY
-        savedEnv.KIMI_BASE_URL = process.env.KIMI_BASE_URL
-        delete process.env.KIMI_BASE_URL
-
-        const mod = await import("@ai-sdk/deepseek")
-        createDeepSeekMock = mod.createDeepSeek as ReturnType<typeof vi.fn>
-        createDeepSeekMock.mockClear()
-    })
-
-    afterEach(() => {
-        process.env.KIMI_API_KEY = savedEnv.KIMI_API_KEY
-        process.env.KIMI_BASE_URL = savedEnv.KIMI_BASE_URL
-    })
-
-    it("uses createDeepSeek with Kimi default base URL for reasoning_content support", () => {
-        process.env.KIMI_API_KEY = "test-kimi-key"
-
-        getAIModel({
-            provider: "kimi",
-            apiKey: "test-kimi-key",
-            modelId: "moonshot-v1-8k",
-        })
-
-        expect(createDeepSeekMock).toHaveBeenCalledWith(
-            expect.objectContaining({
-                baseURL: "https://api.moonshot.cn/v1",
-            }),
-        )
-    })
-
-    it("uses custom base URL when provided for kimi provider", () => {
-        process.env.KIMI_API_KEY = "test-kimi-key"
-
-        getAIModel({
-            provider: "kimi",
-            apiKey: "test-kimi-key",
-            baseUrl: "https://custom-kimi-endpoint.com/v1",
-            modelId: "kimi-k2.6",
-        })
-
-        expect(createDeepSeekMock).toHaveBeenCalledWith(
-            expect.objectContaining({
-                baseURL: "https://custom-kimi-endpoint.com/v1",
-            }),
-        )
-    })
-})
-
 describe("Ollama API key security", () => {
     let createOllamaMock: ReturnType<typeof vi.fn>
     const savedEnv: Record<string, string | undefined> = {}