fix: move History and Download buttons to Settings dialog for cleaner chat interface

* docs(cloudflare): add detailed Cloudflare Workers + R2 deploy guide

* separated cloudflare deploy guide from readme.md

* Missing R2 bucket binding for incremental cache

* docs: move Cloudflare guide to docs/ and improve documentation

- Move Cloudflare_Deploy.md to docs/ folder
- Add 'Deploy without R2' option for simple/free deployments
- Add workers.dev subdomain registration instructions
- Add missing global_fetch_strictly_public flag
- Add troubleshooting for common deployment issues
- Update README.md link to new location

* fix: conditional import for cloudflare dev and regenerate lockfile

- Use dynamic import for @opennextjs/cloudflare to avoid loading workerd during builds
- Regenerate package-lock.json with cross-platform dependencies

* fix: use main lockfile with cloudflare deps added

- Use main branch's package-lock.json as base to ensure cross-platform deps
- Add @opennextjs/cloudflare and wrangler

---------

Co-authored-by: dayuan.jiang <jdy.toh@gmail.com>

README.md

@@ -242,6 +242,11 @@ Or you can deploy by this button.
 
 Be sure to **set the environment variables** in the Vercel dashboard as you did in your local `.env.local` file.
 
+## Deploy on Cloudflare Workers
+
+[Go to Cloudflare Deploy Guide](./docs/Cloudflare_Deploy.md)
+
+
 
 ## Multi-Provider Support
 

components/chat-input.tsx

@@ -1,22 +1,15 @@
 "use client"
 
-import {
-    Download,
-    History,
-    Image as ImageIcon,
-    Loader2,
-    Send,
-    Trash2,
-} from "lucide-react"
+import { Image as ImageIcon, Loader2, Send, Trash2 } from "lucide-react"
 import type React from "react"
 import { useCallback, useEffect, useRef, useState } from "react"
 import { toast } from "sonner"
 import { ButtonWithTooltip } from "@/components/button-with-tooltip"
 import { ErrorToast } from "@/components/error-toast"
-import { HistoryDialog } from "@/components/history-dialog"
+
 import { ModelSelector } from "@/components/model-selector"
 import { ResetWarningModal } from "@/components/reset-warning-modal"
-import { SaveDialog } from "@/components/save-dialog"
+
 import { Button } from "@/components/ui/button"
 import { Switch } from "@/components/ui/switch"
 import { Textarea } from "@/components/ui/textarea"
@@ -25,7 +18,7 @@ import {
     TooltipContent,
     TooltipTrigger,
 } from "@/components/ui/tooltip"
-import { useDiagram } from "@/contexts/diagram-context"
+
 import { useDictionary } from "@/hooks/use-dictionary"
 import { formatMessage } from "@/lib/i18n/utils"
 import { isPdfFile, isTextFile } from "@/lib/pdf-utils"
@@ -152,8 +145,7 @@ interface ChatInputProps {
         File,
         { text: string; charCount: number; isExtracting: boolean }
     >
-    showHistory?: boolean
-    onToggleHistory?: (show: boolean) => void
+
     sessionId?: string
     error?: Error | null
     minimalStyle?: boolean
@@ -175,9 +167,7 @@ export function ChatInput({
     files = [],
     onFileChange = () => {},
     pdfData = new Map(),
-    showHistory = false,
-    onToggleHistory = () => {},
-    sessionId,
+
     error = null,
     minimalStyle = false,
     onMinimalStyleChange = () => {},
@@ -188,12 +178,7 @@ export function ChatInput({
     onConfigureModels = () => {},
 }: ChatInputProps) {
     const dict = useDictionary()
-    const {
-        diagramHistory,
-        saveDiagramToFile,
-        showSaveDialog,
-        setShowSaveDialog,
-    } = useDiagram()
+
     const textareaRef = useRef<HTMLTextAreaElement>(null)
     const fileInputRef = useRef<HTMLInputElement>(null)
     const [isDragging, setIsDragging] = useState(false)
@@ -386,11 +371,6 @@ export function ChatInput({
                             onClear={handleClear}
                         />
 
-                        <HistoryDialog
-                            showHistory={showHistory}
-                            onToggleHistory={onToggleHistory}
-                        />
-
                         <Tooltip>
                             <TooltipTrigger asChild>
                                 <div className="flex items-center gap-1.5">
@@ -421,41 +401,7 @@ export function ChatInput({
                     </div>
 
                     <div className="flex items-center gap-1 overflow-hidden justify-end">
-                        <ButtonWithTooltip
-                            type="button"
-                            variant="ghost"
-                            size="sm"
-                            onClick={() => onToggleHistory(true)}
-                            disabled={isDisabled || diagramHistory.length === 0}
-                            tooltipContent={dict.chat.diagramHistory}
-                            className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                        >
-                            <History className="h-4 w-4" />
-                        </ButtonWithTooltip>
-
-                        <ButtonWithTooltip
-                            type="button"
-                            variant="ghost"
-                            size="sm"
-                            onClick={() => setShowSaveDialog(true)}
-                            disabled={isDisabled}
-                            tooltipContent={dict.chat.saveDiagram}
-                            className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
-                        >
-                            <Download className="h-4 w-4" />
-                        </ButtonWithTooltip>
-
-                        <SaveDialog
-                            open={showSaveDialog}
-                            onOpenChange={setShowSaveDialog}
-                            onSave={(filename, format) =>
-                                saveDiagramToFile(filename, format, sessionId)
-                            }
-                            defaultFilename={`diagram-${new Date()
-                                .toISOString()
-                                .slice(0, 10)}`}
-                        />
-
+                        <div className="flex items-center gap-1 overflow-x-hidden">
                             <ButtonWithTooltip
                                 type="button"
                                 variant="ghost"
@@ -477,7 +423,7 @@ export function ChatInput({
                                 multiple
                                 disabled={isDisabled}
                             />
-
+                        </div>
                         <ModelSelector
                             models={models}
                             selectedModelId={selectedModelId}
@@ -486,9 +432,7 @@ export function ChatInput({
                             disabled={isDisabled}
                             showUnvalidatedModels={showUnvalidatedModels}
                         />
-
                         <div className="w-px h-5 bg-border mx-1" />
-
                         <Button
                             type="submit"
                             disabled={isDisabled || !input.trim()}

components/chat-panel.tsx

@@ -154,7 +154,6 @@ export default function ChatPanel({
     // File processing using extracted hook
     const { files, pdfData, handleFileChange, setFiles } = useFileProcessor()
 
-    const [showHistory, setShowHistory] = useState(false)
     const [showSettingsDialog, setShowSettingsDialog] = useState(false)
     const [showModelConfigDialog, setShowModelConfigDialog] = useState(false)
 
@@ -1066,8 +1065,6 @@ export default function ChatPanel({
                     files={files}
                     onFileChange={handleFileChange}
                     pdfData={pdfData}
-                    showHistory={showHistory}
-                    onToggleHistory={setShowHistory}
                     sessionId={sessionId}
                     error={error}
                     minimalStyle={minimalStyle}
@@ -1088,6 +1085,7 @@ export default function ChatPanel({
                 onToggleDrawioUi={onToggleDrawioUi}
                 darkMode={darkMode}
                 onToggleDarkMode={onToggleDarkMode}
+                sessionId={sessionId}
             />
 
             <ModelConfigDialog

components/settings-dialog.tsx

@@ -1,8 +1,10 @@
 "use client"
 
-import { Moon, Sun } from "lucide-react"
+import { Download, History, Moon, Sun } from "lucide-react"
 import { usePathname, useRouter, useSearchParams } from "next/navigation"
 import { Suspense, useEffect, useState } from "react"
+import { HistoryDialog } from "@/components/history-dialog"
+import { type ExportFormat, SaveDialog } from "@/components/save-dialog"
 import { Button } from "@/components/ui/button"
 import {
     Dialog,
@@ -21,6 +23,7 @@ import {
     SelectValue,
 } from "@/components/ui/select"
 import { Switch } from "@/components/ui/switch"
+import { useDiagram } from "@/contexts/diagram-context"
 import { useDictionary } from "@/hooks/use-dictionary"
 import { getApiEndpoint } from "@/lib/base-path"
 import { i18n, type Locale } from "@/lib/i18n/config"
@@ -65,6 +68,7 @@ interface SettingsDialogProps {
     onToggleDrawioUi: () => void
     darkMode: boolean
     onToggleDarkMode: () => void
+    sessionId?: string
 }
 
 export const STORAGE_ACCESS_CODE_KEY = "next-ai-draw-io-access-code"
@@ -86,6 +90,7 @@ function SettingsContent({
     onToggleDrawioUi,
     darkMode,
     onToggleDarkMode,
+    sessionId,
 }: SettingsDialogProps) {
     const dict = useDictionary()
     const router = useRouter()
@@ -95,11 +100,21 @@ function SettingsContent({
     const [closeProtection, setCloseProtection] = useState(true)
     const [isVerifying, setIsVerifying] = useState(false)
     const [error, setError] = useState("")
+    const [showHistory, setShowHistory] = useState(false)
+    const [showSaveDialog, setShowSaveDialog] = useState(false)
     const [accessCodeRequired, setAccessCodeRequired] = useState(
         () => getStoredAccessCodeRequired() ?? false,
     )
     const [currentLang, setCurrentLang] = useState("en")
 
+    // Get diagram context
+    const { diagramHistory, saveDiagramToFile } = useDiagram()
+
+    // Handler for saving diagram (RENAMED to avoid conflict)
+    const handleDiagramSave = (filename: string, format: ExportFormat) => {
+        saveDiagramToFile(filename, format, sessionId)
+    }
+
     useEffect(() => {
         // Only fetch if not cached in localStorage
         if (getStoredAccessCodeRequired() !== null) return
@@ -206,6 +221,7 @@ function SettingsContent({
     }
 
     return (
+        <>
             <DialogContent className="sm:max-w-lg p-0 gap-0">
                 {/* Header */}
                 <DialogHeader className="px-6 pt-6 pb-4">
@@ -249,7 +265,9 @@ function SettingsContent({
                                     />
                                     <Button
                                         onClick={handleSave}
-                                    disabled={isVerifying || !accessCode.trim()}
+                                        disabled={
+                                            isVerifying || !accessCode.trim()
+                                        }
                                         className="h-9 px-4 rounded-xl"
                                     >
                                         {isVerifying ? "..." : dict.common.save}
@@ -333,7 +351,9 @@ function SettingsContent({
                         {/* Close Protection */}
                         <SettingItem
                             label={dict.settings.closeProtection}
-                        description={dict.settings.closeProtectionDescription}
+                            description={
+                                dict.settings.closeProtectionDescription
+                            }
                         >
                             <Switch
                                 id="close-protection"
@@ -348,6 +368,38 @@ function SettingsContent({
                                 }}
                             />
                         </SettingItem>
+
+                        {/* Diagram Actions */}
+                        <SettingItem
+                            label={dict.settings.diagramActions}
+                            description={
+                                dict.settings.diagramActionsDescription
+                            }
+                        >
+                            <div className="flex gap-2">
+                                <Button
+                                    id="history-button"
+                                    variant="outline"
+                                    size="sm"
+                                    onClick={() => setShowHistory(true)}
+                                    disabled={diagramHistory.length === 0}
+                                    className="h-9 rounded-xl border-border-subtle hover:bg-interactive-hover"
+                                >
+                                    <History className="h-4 w-4 mr-1.5" />
+                                    {dict.settings.history}
+                                </Button>
+                                <Button
+                                    id="download-button"
+                                    variant="outline"
+                                    size="sm"
+                                    onClick={() => setShowSaveDialog(true)}
+                                    className="h-9 rounded-xl border-border-subtle hover:bg-interactive-hover"
+                                >
+                                    <Download className="h-4 w-4 mr-1.5" />
+                                    {dict.settings.download}
+                                </Button>
+                            </div>
+                        </SettingItem>
                     </div>
                 </div>
 
@@ -358,6 +410,22 @@ function SettingsContent({
                     </p>
                 </div>
             </DialogContent>
+            ;(
+            <HistoryDialog
+                showHistory={showHistory}
+                onToggleHistory={setShowHistory}
+            />
+            )
+            <SaveDialog
+                open={showSaveDialog}
+                onOpenChange={setShowSaveDialog}
+                onSave={handleDiagramSave}
+                defaultFilename={`diagram-${new Date()
+                    .toISOString()
+                    .slice(0, 10)}
+`}
+            />
+        </>
     )
 }
 

docs/Cloudflare_Deploy.md

@@ -0,0 +1,267 @@
+# Deploy on Cloudflare Workers
+
+This project can be deployed as a **Cloudflare Worker** using the **OpenNext adapter**, giving you:
+
+- Global edge deployment
+- Very low latency
+- Free `workers.dev` hosting
+- Full Next.js ISR support via R2 (optional)
+
+> **Important Windows Note:** OpenNext and Wrangler are **not fully reliable on native Windows**. Recommended options:
+>
+> - Use **GitHub Codespaces** (works perfectly)
+> - OR use **WSL (Linux)**
+>
+> Pure Windows builds may fail due to WASM file path issues.
+
+---
+
+## Prerequisites
+
+1. A **Cloudflare account** (free tier works for basic deployment)
+2. **Node.js 18+**
+3. **Wrangler CLI** installed (dev dependency is fine):
+
+```bash
+npm install -D wrangler
+```
+
+4. Cloudflare login:
+
+```bash
+npx wrangler login
+```
+
+> **Note:** A payment method is only required if you want to enable R2 for ISR caching. Basic Workers deployment is free.
+
+---
+
+## Step 1 — Install dependencies
+
+```bash
+npm install
+```
+
+---
+
+## Step 2 — Configure environment variables
+
+Cloudflare uses a different file for local testing.
+
+### 1) Create `.dev.vars` (for Cloudflare local + deploy)
+
+```bash
+cp env.example .dev.vars
+```
+
+Fill in your API keys and configuration.
+
+### 2) Make sure `.env.local` also exists (for regular Next.js dev)
+
+```bash
+cp env.example .env.local
+```
+
+Fill in the same values there.
+
+---
+
+## Step 3 — Choose your deployment type
+
+### Option A: Deploy WITHOUT R2 (Simple, Free)
+
+If you don't need ISR caching, you can deploy without R2:
+
+**1. Use simple `open-next.config.ts`:**
+
+```ts
+import { defineCloudflareConfig } from "@opennextjs/cloudflare/config"
+
+export default defineCloudflareConfig({})
+```
+
+**2. Use simple `wrangler.jsonc` (without r2_buckets):**
+
+```jsonc
+{
+  "$schema": "node_modules/wrangler/config-schema.json",
+  "main": ".open-next/worker.js",
+  "name": "next-ai-draw-io-worker",
+  "compatibility_date": "2025-12-08",
+  "compatibility_flags": ["nodejs_compat", "global_fetch_strictly_public"],
+  "assets": {
+    "directory": ".open-next/assets",
+    "binding": "ASSETS"
+  },
+  "services": [
+    {
+      "binding": "WORKER_SELF_REFERENCE",
+      "service": "next-ai-draw-io-worker"
+    }
+  ]
+}
+```
+
+Skip to **Step 4**.
+
+---
+
+### Option B: Deploy WITH R2 (Full ISR Support)
+
+R2 enables **Incremental Static Regeneration (ISR)** caching. Requires a payment method on your Cloudflare account.
+
+**1. Create an R2 bucket** in the Cloudflare Dashboard:
+
+- Go to **Storage & Databases → R2**
+- Click **Create bucket**
+- Name it: `next-inc-cache`
+
+**2. Configure `open-next.config.ts`:**
+
+```ts
+import { defineCloudflareConfig } from "@opennextjs/cloudflare/config"
+import r2IncrementalCache from "@opennextjs/cloudflare/overrides/incremental-cache/r2-incremental-cache"
+
+export default defineCloudflareConfig({
+  incrementalCache: r2IncrementalCache,
+})
+```
+
+**3. Configure `wrangler.jsonc` (with R2):**
+
+```jsonc
+{
+  "$schema": "node_modules/wrangler/config-schema.json",
+  "main": ".open-next/worker.js",
+  "name": "next-ai-draw-io-worker",
+  "compatibility_date": "2025-12-08",
+  "compatibility_flags": ["nodejs_compat", "global_fetch_strictly_public"],
+  "assets": {
+    "directory": ".open-next/assets",
+    "binding": "ASSETS"
+  },
+  "r2_buckets": [
+    {
+      "binding": "NEXT_INC_CACHE_R2_BUCKET",
+      "bucket_name": "next-inc-cache"
+    }
+  ],
+  "services": [
+    {
+      "binding": "WORKER_SELF_REFERENCE",
+      "service": "next-ai-draw-io-worker"
+    }
+  ]
+}
+```
+
+> **Important:** The `bucket_name` must exactly match the name you created in the Cloudflare dashboard.
+
+---
+
+## Step 4 — Register a workers.dev subdomain (first-time only)
+
+Before your first deployment, you need a workers.dev subdomain.
+
+**Option 1: Via Cloudflare Dashboard (Recommended)**
+
+Visit: https://dash.cloudflare.com → Workers & Pages → Overview → Set up a subdomain
+
+**Option 2: During deploy**
+
+When you run `npm run deploy`, Wrangler may prompt:
+
+```
+Would you like to register a workers.dev subdomain? (Y/n)
+```
+
+Type `Y` and choose a subdomain name.
+
+> **Note:** In CI/CD or non-interactive environments, the prompt won't appear. Register via the dashboard first.
+
+---
+
+## Step 5 — Deploy to Cloudflare
+
+```bash
+npm run deploy
+```
+
+What the script does:
+
+- Builds the Next.js app
+- Converts it to a Cloudflare Worker via OpenNext
+- Uploads static assets
+- Publishes the Worker
+
+Your app will be available at:
+
+```
+https://<worker-name>.<your-subdomain>.workers.dev
+```
+
+---
+
+## Common issues & fixes
+
+### `You need to register a workers.dev subdomain`
+
+**Cause:** No workers.dev subdomain registered for your account.
+
+**Fix:** Go to https://dash.cloudflare.com → Workers & Pages → Set up a subdomain.
+
+---
+
+### `Please enable R2 through the Cloudflare Dashboard`
+
+**Cause:** R2 is configured in wrangler.jsonc but not enabled on your account.
+
+**Fix:** Either enable R2 (requires payment method) or use Option A (deploy without R2).
+
+---
+
+### `No R2 binding "NEXT_INC_CACHE_R2_BUCKET" found`
+
+**Cause:** `r2_buckets` is missing from `wrangler.jsonc`.
+
+**Fix:** Add the `r2_buckets` section or switch to Option A (without R2).
+
+---
+
+### `Can't set compatibility date in the future`
+
+**Cause:** `compatibility_date` in wrangler config is set to a future date.
+
+**Fix:** Change `compatibility_date` to today or an earlier date.
+
+---
+
+### Windows error: `resvg.wasm?module` (ENOENT)
+
+**Cause:** Windows filenames cannot include `?`, but a wasm asset uses `?module` in its filename.
+
+**Fix:** Build/deploy on Linux (WSL, Codespaces, or CI).
+
+---
+
+## Optional: Preview locally
+
+Preview the Worker locally before deploying:
+
+```bash
+npm run preview
+```
+
+---
+
+## Summary
+
+| Feature | Without R2 | With R2 |
+|---------|------------|---------|
+| Cost | Free | Requires payment method |
+| ISR Caching | No | Yes |
+| Static Pages | Yes | Yes |
+| API Routes | Yes | Yes |
+| Setup Complexity | Simple | Moderate |
+
+Choose **without R2** for testing or simple apps. Choose **with R2** for production apps that need ISR caching.

lib/i18n/dictionaries/en.json

@@ -98,7 +98,11 @@
         "minimal": "Minimal",
         "sketch": "Sketch",
         "closeProtection": "Close Protection",
-        "closeProtectionDescription": "Show confirmation when leaving the page."
+        "closeProtectionDescription": "Show confirmation when leaving the page.",
+        "diagramActions": "Diagram Actions",
+        "diagramActionsDescription": "Manage diagram history and exports",
+        "history": "History",
+        "download": "Download"
     },
     "save": {
         "title": "Save Diagram",

lib/i18n/dictionaries/ja.json

@@ -98,7 +98,11 @@
         "minimal": "ミニマル",
         "sketch": "スケッチ",
         "closeProtection": "ページ離脱確認",
-        "closeProtectionDescription": "ページを離れる際に確認を表示します。"
+        "closeProtectionDescription": "ページを離れる際に確認を表示します。",
+        "diagramActions": "ダイアグラム操作",
+        "diagramActionsDescription": "ダイアグラムの履歴とエクスポートを管理",
+        "history": "履歴",
+        "download": "ダウンロード"
     },
     "save": {
         "title": "ダイアグラムを保存",

lib/i18n/dictionaries/zh.json

@@ -98,7 +98,11 @@
         "minimal": "简约",
         "sketch": "草图",
         "closeProtection": "关闭确认",
-        "closeProtectionDescription": "离开页面时显示确认。"
+        "closeProtectionDescription": "离开页面时显示确认。",
+        "diagramActions": "图表操作",
+        "diagramActionsDescription": "管理图表历史记录和导出",
+        "history": "历史记录",
+        "download": "下载"
     },
     "save": {
         "title": "保存图表",

next.config.ts

@@ -17,3 +17,13 @@ const nextConfig: NextConfig = {
 }
 
 export default nextConfig
+
+// Initialize OpenNext Cloudflare for local development only
+// This must be a dynamic import to avoid loading workerd binary during builds
+if (process.env.NODE_ENV === "development") {
+    import("@opennextjs/cloudflare").then(
+        ({ initOpenNextCloudflareForDev }) => {
+            initOpenNextCloudflareForDev()
+        },
+    )
+}

open-next.config.ts

@@ -0,0 +1,7 @@
+// default open-next.config.ts file created by @opennextjs/cloudflare
+import { defineCloudflareConfig } from "@opennextjs/cloudflare/config"
+import r2IncrementalCache from "@opennextjs/cloudflare/overrides/incremental-cache/r2-incremental-cache"
+
+export default defineCloudflareConfig({
+    incrementalCache: r2IncrementalCache,
+})

package.json

@@ -12,6 +12,10 @@
         "format": "biome check --write .",
         "check": "biome ci",
         "prepare": "husky",
+        "preview": "opennextjs-cloudflare build && opennextjs-cloudflare preview",
+        "deploy": "opennextjs-cloudflare build && opennextjs-cloudflare deploy",
+        "upload": "opennextjs-cloudflare build && opennextjs-cloudflare upload",
+        "cf-typegen": "wrangler types --env-interface CloudflareEnv cloudflare-env.d.ts",
         "electron:dev": "node scripts/electron-dev.mjs",
         "electron:build": "npm run build && npm run electron:compile",
         "electron:compile": "npx esbuild electron/main/index.ts electron/preload/index.ts electron/preload/settings.ts --bundle --platform=node --outdir=dist-electron --external:electron --sourcemap --packages=external && npx shx cp -r electron/settings dist-electron/",
@@ -39,6 +43,7 @@
         "@langfuse/otel": "^4.4.4",
         "@langfuse/tracing": "^4.4.9",
         "@next/third-parties": "^16.0.6",
+        "@opennextjs/cloudflare": "1.14.7",
         "@openrouter/ai-sdk-provider": "^1.5.4",
         "@opentelemetry/exporter-trace-otlp-http": "^0.208.0",
         "@opentelemetry/sdk-trace-node": "^2.2.0",
@@ -111,7 +116,8 @@
         "shx": "^0.4.0",
         "tailwindcss": "^4",
         "typescript": "^5",
-        "wait-on": "^9.0.3"
+        "wait-on": "^9.0.3",
+        "wrangler": "4.54.0"
     },
     "overrides": {
         "@openrouter/ai-sdk-provider": {

public/_headers

@@ -0,0 +1,2 @@
+/_next/static/*
+  Cache-Control: public,max-age=31536000,immutable

wrangler.jsonc

@@ -0,0 +1,23 @@
+{
+    "$schema": "node_modules/wrangler/config-schema.json",
+    "main": ".open-next/worker.js",
+    "name": "next-ai-draw-io-worker",
+    "compatibility_date": "2025-12-08", // must be a today or past compatibility_date
+    "compatibility_flags": ["nodejs_compat", "global_fetch_strictly_public"],
+    "assets": {
+        "directory": ".open-next/assets",
+        "binding": "ASSETS"
+    },
+    "r2_buckets": [
+        {
+            "binding": "NEXT_INC_CACHE_R2_BUCKET",
+            "bucket_name": "next-inc-cache"
+        }
+    ],
+    "services": [
+        {
+            "binding": "WORKER_SELF_REFERENCE",
+            "service": "next-ai-draw-io-worker"
+        }
+    ]
+}