fix(cascade-delete): recursively collect edge children (labels)

- Change from cellsToDelete.add(edgeId) to collectDescendants(edgeId)
- Fixes orphaned edge labels causing draw.io to crash/clear canvas
- Edge labels (parent=edgeId) are now deleted with their parent edge

proxy.ts

@@ -1,63 +0,0 @@
-import { match as matchLocale } from "@formatjs/intl-localematcher"
-import Negotiator from "negotiator"
-import type { NextRequest } from "next/server"
-import { NextResponse } from "next/server"
-import { i18n } from "./lib/i18n/config"
-
-function getLocale(request: NextRequest): string | undefined {
-    // Negotiator expects plain object so we need to transform headers
-    const negotiatorHeaders: Record<string, string> = {}
-    request.headers.forEach((value, key) => {
-        negotiatorHeaders[key] = value
-    })
-
-    // @ts-expect-error locales are readonly
-    const locales: string[] = i18n.locales
-
-    // Use negotiator and intl-localematcher to get best locale
-    const languages = new Negotiator({ headers: negotiatorHeaders }).languages(
-        locales,
-    )
-
-    const locale = matchLocale(languages, locales, i18n.defaultLocale)
-
-    return locale
-}
-
-export function proxy(request: NextRequest) {
-    const pathname = request.nextUrl.pathname
-
-    // Skip API routes, static files, and Next.js internals
-    if (
-        pathname.startsWith("/api/") ||
-        pathname.startsWith("/_next/") ||
-        pathname.includes("/favicon") ||
-        /\.(.*)$/.test(pathname)
-    ) {
-        return
-    }
-
-    // Check if there is any supported locale in the pathname
-    const pathnameIsMissingLocale = i18n.locales.every(
-        (locale) =>
-            !pathname.startsWith(`/${locale}/`) && pathname !== `/${locale}`,
-    )
-
-    // Redirect if there is no locale
-    if (pathnameIsMissingLocale) {
-        const locale = getLocale(request)
-
-        // Redirect to localized path
-        return NextResponse.redirect(
-            new URL(
-                `/${locale}${pathname.startsWith("/") ? "" : "/"}${pathname}`,
-                request.url,
-            ),
-        )
-    }
-}
-
-export const config = {
-    // Matcher ignoring `/_next/` and `/api/`
-    matcher: ["/((?!api|_next/static|_next/image|favicon.ico).*)"],
-}