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

app/[lang]/page.tsx

@@ -100,8 +100,12 @@ export default function Home() {
     const handleDrawioAutoSave = useCallback(
         (data: { xml?: string }) => {
             handleDiagramAutoSave(data)
+            // Only suppress modified state when persistence is available
+            if (canPersist) {
+                drawioRef.current?.status({ message: "", modified: false })
+            }
         },
-        [handleDiagramAutoSave],
+        [canPersist, drawioRef, handleDiagramAutoSave],
     )
 
     const handleDarkModeChange = () => {

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) {
-                messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
-                scrollThrottleRef.current = setTimeout(() => {
-                    scrollThrottleRef.current = null
-                    messagesEndRef.current?.scrollIntoView({
-                        behavior: "smooth",
-                    })
-                }, 150)
-            }
+            // Single message added - smooth scroll
+            messagesEndRef.current.scrollIntoView({ behavior: "smooth" })
         }
     }, [messages])
 

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" />
-                        )
+                        <CodeBlock code={input.xml} language="xml" />
                     ) : typeof input === "object" &&
                       input.operations &&
                       Array.isArray(input.operations) ? (

lib/ai-providers.ts

@@ -1356,11 +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
+    // qwen3.5-plus is a vision model
     if (
         lowerModelId.includes("qwen") &&
         !hasVisionIndicator &&
-        !lowerModelId.includes("qwen3.5")
+        !lowerModelId.includes("qwen3.5-plus") &&
+        !lowerModelId.includes("qwen3.5-flash")
     ) {
         return false
     }

packages/mcp-server/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.1.19",
+    "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) {

tests/unit/ai-providers.test.ts

@@ -200,8 +200,6 @@ 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)