refactor: merge api/recipes and api/rezepte into unified recipeLang route

Consolidate duplicate recipe API routes into a single
api/[recipeLang=recipeLang]/ structure. Both /api/recipes/ and
/api/rezepte/ URLs continue to work via the param matcher. Shared
read endpoints now serve both languages with caching for both.

Also: remove dead code (5 unused components, cookie.js) and the
redundant cron-execute recurring payment route.

src/routes/api/[recipeLang=recipeLang]/edit/+server.ts

@@ -0,0 +1,59 @@
+import type { RequestHandler } from '@sveltejs/kit';
+import { Recipe } from '$models/Recipe';
+import { dbConnect } from '$utils/db';
+import type {RecipeModelType} from '$types/types';
+import { error } from '@sveltejs/kit';
+import { rename } from 'fs/promises';
+import { join } from 'path';
+import { existsSync } from 'fs';
+import { invalidateRecipeCaches } from '$lib/server/cache';
+
+// header: use for bearer token for now
+// recipe json in body
+export const POST: RequestHandler = async ({request, locals}) => {
+  let message = await request.json()
+  const recipe_json = message.recipe
+  const auth = await locals.auth();
+  if(!auth){
+	  throw error(403, "Not logged in")
+  }
+  else{
+	await dbConnect();
+
+	// Check if short_name has changed
+	const oldShortName = message.old_short_name;
+	const newShortName = recipe_json.short_name;
+
+	if (oldShortName !== newShortName) {
+		// Rename image files in all three directories
+		const imageDirectories = ['full', 'thumb', 'placeholder'];
+		const staticPath = join(process.cwd(), 'static', 'rezepte');
+
+		for (const dir of imageDirectories) {
+			const oldPath = join(staticPath, dir, `${oldShortName}.webp`);
+			const newPath = join(staticPath, dir, `${newShortName}.webp`);
+
+			// Only rename if the old file exists
+			if (existsSync(oldPath)) {
+				try {
+					await rename(oldPath, newPath);
+					console.log(`Renamed ${dir}/${oldShortName}.webp -> ${dir}/${newShortName}.webp`);
+				} catch (err) {
+					console.error(`Failed to rename ${dir}/${oldShortName}.webp:`, err);
+					// Continue with other files even if one fails
+				}
+			}
+		}
+	}
+
+	await Recipe.findOneAndUpdate({short_name: message.old_short_name }, recipe_json);
+
+	// Invalidate recipe caches after successful update
+	await invalidateRecipeCaches();
+
+	return new Response(JSON.stringify({msg: "Edited recipe successfully"}),{
+			    status: 200,
+  	});
+
+  }
+};