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

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}

lib/ai-providers.ts

@@ -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/package-lock.json

@@ -1,18 +1,18 @@
 {
     "name": "@next-ai-drawio/mcp-server",
-    "version": "0.1.10",
+    "version": "0.1.6",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@next-ai-drawio/mcp-server",
-            "version": "0.1.10",
+            "version": "0.1.6",
             "license": "Apache-2.0",
             "dependencies": {
                 "@modelcontextprotocol/sdk": "^1.0.4",
                 "linkedom": "^0.18.0",
                 "open": "^11.0.0",
-                "zod": "^4.0.0"
+                "zod": "^3.24.0"
             },
             "bin": {
                 "next-ai-drawio-mcp": "dist/index.js"
@@ -2051,9 +2051,9 @@
             }
         },
         "node_modules/zod": {
-            "version": "4.3.2",
+            "version": "3.25.76",
-            "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.2.tgz",
+            "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-            "integrity": "sha512-b8L8yn4rIVfiXyHAmnr52/ZEpDumlT0bmxiq3Ws1ybrinhflGpt12Hvv54kYnEsGPRs6o/Ka3/ppA2OWY21IVg==",
+            "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
             "license": "MIT",
             "peer": true,
             "funding": {

packages/mcp-server/package.json

@@ -39,7 +39,7 @@
         "@modelcontextprotocol/sdk": "^1.0.4",
         "linkedom": "^0.18.0",
         "open": "^11.0.0",
-        "zod": "^4.0.0"
+        "zod": "^3.24.0"
     },
     "devDependencies": {
         "@types/node": "^24.0.0",