add option to create location in all subsequent months

- Added toggle in LocationEditForm for adding locations to future months (disabled by default)
- Modified updateOrAddLocation action to support batch creation across subsequent months
- Only creates locations in months where no location with same name exists
- Added translations for toggle text in Croatian and English
- Fixed unused variable warning in deleteLocationById
- Improved auth.ts development comments for clarity

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/lib/auth.ts

@@ -7,17 +7,31 @@ import { defaultLocale } from '../i18n';
 
 export const myAuth = () => {
 
-   // Ovo koristim u developmentu
+   /** 
    
-   // const session:Session = {
-   //    user: {
-   //       id: "109754742613069927799",
-   //       name: "Nikola Derežić",
-   //    },
-   //    expires: "123",
-   // };
+   Google auth does not work in development environment
+   - this is a hack to make it work in development environment
+   - it returns a fake session object which is used by the Next-Auth middleware
+
+   Instructions: when in dev environment, uncomment the following code snippet
+   - this will return a fake session object which is used by the Next-Auth middleware
+   - when in production environment, comment the code snippet back
+
+   Note: this is not a secure way to handle authentication, it is only for development purposes
+   - in production environment, the auth should be handled by the Next-Auth middleware
+
+   Code snippet:
    
-   // return(Promise.resolve(session));
+   const session:Session = {
+      user: {
+         id: "109754742613069927799",
+         name: "Nikola Derežić",
+      },
+      expires: "123",
+   };
+   
+   return(Promise.resolve(session));
+   */
 
    return(auth());
 }