Revert "fix: make draw.io built-in save button work (#293)"

This reverts commit bcc6684ecb.

app/page.tsx

@@ -1,5 +1,5 @@
 "use client"
-import { useCallback, useEffect, useRef, useState } from "react"
+import { useEffect, useRef, useState } from "react"
 import { DrawIoEmbed } from "react-drawio"
 import type { ImperativePanelHandle } from "react-resizable-panels"
 import ChatPanel from "@/components/chat-panel"
@@ -21,8 +21,6 @@ export default function Home() {
         onDrawioLoad,
         resetDrawioReady,
         saveDiagramToStorage,
-        showSaveDialog,
-        setShowSaveDialog,
     } = useDiagram()
     const [isMobile, setIsMobile] = useState(false)
     const [isChatVisible, setIsChatVisible] = useState(true)
@@ -32,24 +30,6 @@ export default function Home() {
     const [closeProtection, setCloseProtection] = useState(false)
 
     const chatPanelRef = useRef<ImperativePanelHandle>(null)
-    const isSavingRef = useRef(false)
-
-    // Reset saving flag when dialog closes (with delay to ignore lingering save events from draw.io)
-    useEffect(() => {
-        if (!showSaveDialog && isSavingRef.current) {
-            const timeout = setTimeout(() => {
-                isSavingRef.current = false
-            }, 1000)
-            return () => clearTimeout(timeout)
-        }
-    }, [showSaveDialog])
-
-    // Handle save from draw.io's built-in save button
-    const handleDrawioSave = useCallback(() => {
-        if (isSavingRef.current) return
-        isSavingRef.current = true
-        setShowSaveDialog(true)
-    }, [setShowSaveDialog])
 
     // Load preferences from localStorage after mount
     useEffect(() => {
@@ -175,7 +155,6 @@ export default function Home() {
                                     ref={drawioRef}
                                     onExport={handleDiagramExport}
                                     onLoad={onDrawioLoad}
-                                    onSave={handleDrawioSave}
                                     baseUrl={drawioBaseUrl}
                                     urlParameters={{
                                         ui: drawioUi,

components/chat-input.tsx

@@ -155,16 +155,12 @@ export function ChatInput({
     minimalStyle = false,
     onMinimalStyleChange = () => {},
 }: ChatInputProps) {
-    const {
-        diagramHistory,
-        saveDiagramToFile,
-        showSaveDialog,
-        setShowSaveDialog,
-    } = useDiagram()
+    const { diagramHistory, saveDiagramToFile } = useDiagram()
     const textareaRef = useRef<HTMLTextAreaElement>(null)
     const fileInputRef = useRef<HTMLInputElement>(null)
     const [isDragging, setIsDragging] = useState(false)
     const [showClearDialog, setShowClearDialog] = useState(false)
+    const [showSaveDialog, setShowSaveDialog] = useState(false)
 
     // Allow retry when there's an error (even if status is still "streaming" or "submitted")
     const isDisabled =
@@ -405,7 +401,7 @@ export function ChatInput({
                             size="sm"
                             onClick={() => setShowSaveDialog(true)}
                             disabled={isDisabled}
-                            tooltipContent="Save diagram (deprecated: use Save button in upper right corner of draw.io)"
+                            tooltipContent="Save diagram"
                             className="h-8 w-8 p-0 text-muted-foreground hover:text-foreground"
                         >
                             <Download className="h-4 w-4" />

contexts/diagram-context.tsx

@@ -27,8 +27,6 @@ interface DiagramContextType {
     isDrawioReady: boolean
     onDrawioLoad: () => void
     resetDrawioReady: () => void
-    showSaveDialog: boolean
-    setShowSaveDialog: (show: boolean) => void
 }
 
 const DiagramContext = createContext<DiagramContextType | undefined>(undefined)
@@ -40,7 +38,6 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
         { svg: string; xml: string }[]
     >([])
     const [isDrawioReady, setIsDrawioReady] = useState(false)
-    const [showSaveDialog, setShowSaveDialog] = useState(false)
     const hasCalledOnLoadRef = useRef(false)
     const drawioRef = useRef<DrawIoEmbedRef | null>(null)
     const resolverRef = useRef<((value: string) => void) | null>(null)
@@ -312,8 +309,6 @@ export function DiagramProvider({ children }: { children: React.ReactNode }) {
                 isDrawioReady,
                 onDrawioLoad,
                 resetDrawioReady,
-                showSaveDialog,
-                setShowSaveDialog,
             }}
         >
             {children}