fix: improve image not supported error detection for DeepSeek

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 {
+import { getAIModel, supportsPromptCaching } from "@/lib/ai-providers"
-    getAIModel,
-    supportsImageInput,
-    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

@@ -283,7 +283,7 @@ export function ChatMessageDisplay({
         try {
             await navigator.clipboard.writeText(text)
             setCopyState(messageId, isToolCall, true)
-        } catch (_err) {
+        } catch (err) {
             // Fallback for non-secure contexts (HTTP) or permission denied
             const textarea = document.createElement("textarea")
             textarea.value = text

components/chat-panel.tsx

@@ -905,6 +905,7 @@ 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}

components/model-config-dialog.tsx

@@ -21,6 +21,7 @@ import {
     Zap,
 } from "lucide-react"
 import { useCallback, useEffect, useRef, useState } from "react"
+import { toast } from "sonner"
 import {
     AlertDialog,
     AlertDialogAction,
@@ -516,6 +517,7 @@ export function ModelConfigDialog({
                     {/* Provider Details (Right Panel) */}
                     <div className="flex-1 min-w-0 flex flex-col overflow-auto [&::-webkit-scrollbar]:hidden ">
                         {selectedProvider ? (
+                            <>
                                 <ScrollArea className="flex-1" ref={scrollRef}>
                                     <div className="p-6 space-y-8">
                                         {/* Provider Header */}
@@ -557,7 +559,10 @@ export function ModelConfigDialog({
                                                 <div className="flex items-center gap-1.5 px-3 py-1.5 rounded-full bg-success-muted text-success">
                                                     <Check className="h-3.5 w-3.5 animate-check-pop" />
                                                     <span className="text-xs font-medium">
-                                                    {dict.modelConfig.verified}
+                                                        {
+                                                            dict.modelConfig
+                                                                .verified
+                                                        }
                                                     </span>
                                                 </div>
                                             )}
@@ -570,13 +575,18 @@ export function ModelConfigDialog({
                                                 className="text-destructive hover:text-destructive hover:bg-destructive/10"
                                             >
                                                 <Trash2 className="h-4 w-4 mr-1.5" />
-                                            {dict.modelConfig.deleteProvider}
+                                                {
+                                                    dict.modelConfig
+                                                        .deleteProvider
+                                                }
                                             </Button>
                                         </div>
 
                                         {/* Configuration Section */}
                                         <ConfigSection
-                                        title={dict.modelConfig.configuration}
+                                            title={
+                                                dict.modelConfig.configuration
+                                            }
                                             icon={Settings2}
                                         >
                                             <ConfigCard>
@@ -626,7 +636,8 @@ export function ModelConfigDialog({
                                                             >
                                                                 <Key className="h-3.5 w-3.5 text-muted-foreground" />
                                                                 {
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .awsAccessKeyId
                                                                 }
                                                             </Label>
@@ -661,7 +672,8 @@ export function ModelConfigDialog({
                                                             >
                                                                 <Key className="h-3.5 w-3.5 text-muted-foreground" />
                                                                 {
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .awsSecretAccessKey
                                                                 }
                                                             </Label>
@@ -677,10 +689,13 @@ export function ModelConfigDialog({
                                                                         selectedProvider.awsSecretAccessKey ||
                                                                         ""
                                                                     }
-                                                                onChange={(e) =>
+                                                                    onChange={(
+                                                                        e,
+                                                                    ) =>
                                                                         handleProviderUpdate(
                                                                             "awsSecretAccessKey",
-                                                                        e.target
+                                                                            e
+                                                                                .target
                                                                                 .value,
                                                                         )
                                                                     }
@@ -722,7 +737,8 @@ export function ModelConfigDialog({
                                                             >
                                                                 <Link2 className="h-3.5 w-3.5 text-muted-foreground" />
                                                                 {
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .awsRegion
                                                                 }
                                                             </Label>
@@ -801,7 +817,8 @@ export function ModelConfigDialog({
                                                                     </SelectItem>
                                                                     <SelectItem value="sa-east-1">
                                                                         sa-east-1
-                                                                    (São Paulo)
+                                                                        (São
+                                                                        Paulo)
                                                                     </SelectItem>
                                                                 </SelectContent>
                                                             </Select>
@@ -848,7 +865,8 @@ export function ModelConfigDialog({
                                                                         }
                                                                     </>
                                                                 ) : (
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .test
                                                                 )}
                                                             </Button>
@@ -904,7 +922,8 @@ export function ModelConfigDialog({
                                                                         }
                                                                     </>
                                                                 ) : (
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .test
                                                                 )}
                                                             </Button>
@@ -930,7 +949,8 @@ export function ModelConfigDialog({
                                                             >
                                                                 <Key className="h-3.5 w-3.5 text-muted-foreground" />
                                                                 {
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .apiKey
                                                                 }
                                                             </Label>
@@ -1047,7 +1067,8 @@ export function ModelConfigDialog({
                                                             >
                                                                 <Link2 className="h-3.5 w-3.5 text-muted-foreground" />
                                                                 {
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .baseUrl
                                                                 }
                                                                 <span className="text-muted-foreground font-normal">
@@ -1077,7 +1098,8 @@ export function ModelConfigDialog({
                                                                             .provider
                                                                     ]
                                                                         .defaultBaseUrl ||
-                                                                dict.modelConfig
+                                                                    dict
+                                                                        .modelConfig
                                                                         .customEndpoint
                                                                 }
                                                                 className="h-9 rounded-xl font-mono text-xs"
@@ -1100,10 +1122,13 @@ export function ModelConfigDialog({
                                                                 dict.modelConfig
                                                                     .customModelId
                                                             }
-                                                        value={customModelInput}
+                                                            value={
+                                                                customModelInput
+                                                            }
                                                             onChange={(e) => {
                                                                 setCustomModelInput(
-                                                                e.target.value,
+                                                                    e.target
+                                                                        .value,
                                                                 )
                                                                 if (
                                                                     duplicateError
@@ -1123,7 +1148,9 @@ export function ModelConfigDialog({
                                                                         handleAddModel(
                                                                             customModelInput.trim(),
                                                                         )
-                                                                if (success) {
+                                                                    if (
+                                                                        success
+                                                                    ) {
                                                                         setCustomModelInput(
                                                                             "",
                                                                         )
@@ -1168,7 +1195,9 @@ export function ModelConfigDialog({
                                                         <Plus className="h-3.5 w-3.5" />
                                                     </Button>
                                                     <Select
-                                                    onValueChange={(value) => {
+                                                        onValueChange={(
+                                                            value,
+                                                        ) => {
                                                             if (value) {
                                                                 handleAddModel(
                                                                     value,
@@ -1204,7 +1233,9 @@ export function ModelConfigDialog({
                                                                         }
                                                                         className="font-mono text-xs"
                                                                     >
-                                                                    {modelId}
+                                                                        {
+                                                                            modelId
+                                                                        }
                                                                     </SelectItem>
                                                                 ),
                                                             )}
@@ -1215,8 +1246,8 @@ export function ModelConfigDialog({
                                         >
                                             {/* Model List */}
                                             <div className="rounded-2xl border border-border-subtle bg-surface-2/30 overflow-hidden min-h-[120px]">
-                                            {selectedProvider.models.length ===
+                                                {selectedProvider.models
-                                            0 ? (
+                                                    .length === 0 ? (
                                                     <div className="p-6 text-center h-full flex flex-col items-center justify-center">
                                                         <div className="inline-flex items-center justify-center w-10 h-10 rounded-full bg-surface-2 mb-3">
                                                             <Sparkles className="h-5 w-5 text-muted-foreground" />
@@ -1233,7 +1264,9 @@ export function ModelConfigDialog({
                                                         {selectedProvider.models.map(
                                                             (model, index) => (
                                                                 <div
-                                                                key={model.id}
+                                                                    key={
+                                                                        model.id
+                                                                    }
                                                                     className={cn(
                                                                         "transition-colors duration-150 hover:bg-interactive-hover/50",
                                                                     )}
@@ -1467,6 +1500,7 @@ export function ModelConfigDialog({
                                         </ConfigSection>
                                     </div>
                                 </ScrollArea>
+                            </>
                         ) : (
                             <div className="h-full flex flex-col items-center justify-center p-8 text-center">
                                 <div className="inline-flex items-center justify-center w-16 h-16 rounded-2xl bg-surface-2 mb-4">

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
-}

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",
+            "version": "6.14.0",
-            "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.1.tgz",
+            "resolved": "https://registry.npmjs.org/qs/-/qs-6.14.0.tgz",
-            "integrity": "sha512-4EK3+xJl8Ts67nLYNwqw/dsFVnCf+qR7RgXSK9jEEm9unao3njwMDdmsdvoKBKHzxd7tCYz5e5M+SnMjdtXGQQ==",
+            "integrity": "sha512-YWWTjgABSKcvs/nWBi9PycY/JiPJqOD4JA6o9Sej2AtvSGarXxKC3OQSk4pAarbdQlKAh5D4FCQkJNkW+GAn3w==",
             "license": "BSD-3-Clause",
             "dependencies": {
                 "side-channel": "^1.1.0"

packages/mcp-server/README.md

@@ -90,7 +90,7 @@ Use the standard MCP configuration with:
 - **Natural Language**: Describe diagrams in plain text - flowcharts, architecture diagrams, etc.
 - **Edit Support**: Modify existing diagrams with natural language instructions
 - **Export**: Save diagrams as `.drawio` files
-- **Self-contained**: Embedded server, works offline (except draw.io UI which loads from `embed.diagrams.net` by default, configurable via `DRAWIO_BASE_URL`)
+- **Self-contained**: Embedded server, works offline (except draw.io UI which loads from embed.diagrams.net)
 
 ## Available Tools
 
@@ -130,33 +130,6 @@ Use the standard MCP configuration with:
 | Variable | Default | Description |
 |----------|---------|-------------|
 | `PORT` | `6002` | Port for the embedded HTTP server |
-| `DRAWIO_BASE_URL` | `https://embed.diagrams.net` | Base URL for the draw.io embed. Set this to use a self-hosted draw.io instance for private deployments. |
-
-### Private Deployment (Self-hosted draw.io)
-
-For security-sensitive environments that require private deployment of draw.io:
-
-```json
-{
-  "mcpServers": {
-    "drawio": {
-      "command": "npx",
-      "args": ["@next-ai-drawio/mcp-server@latest"],
-      "env": { 
-        "DRAWIO_BASE_URL": "https://drawio.your-company.com"
-      }
-    }
-  }
-}
-```
-
-You can deploy your own draw.io instance using the official Docker image:
-
-```bash
-docker run -d -p 8080:8080 jgraph/drawio
-```
-
-Then set `DRAWIO_BASE_URL=http://localhost:8080` (or your server's URL).
 
 ## Troubleshooting
 

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",

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

@@ -13,28 +13,6 @@ import {
 } from "./history.js"
 import { log } from "./logger.js"
 
-// Configurable draw.io embed URL for private deployments
-const DRAWIO_BASE_URL =
-    process.env.DRAWIO_BASE_URL || "https://embed.diagrams.net"
-
-// Extract origin (scheme + host + port) from URL for postMessage security check
-function getOrigin(url: string): string {
-    try {
-        const parsed = new URL(url)
-        return `${parsed.protocol}//${parsed.host}`
-    } catch {
-        return url // Fallback if parsing fails
-    }
-}
-
-const DRAWIO_ORIGIN = getOrigin(DRAWIO_BASE_URL)
-
-// Normalize URL for iframe src - ensure no double slashes
-function normalizeUrl(url: string): string {
-    // Remove trailing slash to avoid double slashes
-    return url.replace(/\/$/, '')
-}
-
 interface SessionState {
     xml: string
     version: number
@@ -149,12 +127,7 @@ function cleanupExpiredSessions(): void {
     }
 }
 
-const cleanupIntervalId = setInterval(cleanupExpiredSessions, 5 * 60 * 1000)
+setInterval(cleanupExpiredSessions, 5 * 60 * 1000)
-
-export function shutdown(): void {
-    clearInterval(cleanupIntervalId)
-    stopHttpServer()
-}
 
 export function getServerPort(): number {
     return serverPort
@@ -425,7 +398,7 @@ function getHtmlPage(sessionId: string): string {
             </div>
             <div id="status" class="status disconnected">Connecting...</div>
         </div>
-        <iframe id="drawio" src="${normalizeUrl(DRAWIO_BASE_URL)}/?embed=1&proto=json&spin=1&libraries=1"></iframe>
+        <iframe id="drawio" src="https://embed.diagrams.net/?embed=1&proto=json&spin=1&libraries=1"></iframe>
     </div>
     <button id="history-btn" title="History" ${sessionId ? "" : "disabled"}>
         <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
@@ -455,7 +428,7 @@ function getHtmlPage(sessionId: string): string {
         let pendingAiSvg = false;
 
         window.addEventListener('message', (e) => {
-            if (e.origin !== '${DRAWIO_ORIGIN}') return;
+            if (e.origin !== 'https://embed.diagrams.net') return;
             try {
                 const msg = JSON.parse(e.data);
                 if (msg.event === 'init') {

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)
         }