Add reordering functionality for events, media, and opportunities in frontend

[Copilot]

Overview

Added reordering functionality to the frontend newsletter generator interface, allowing users to easily reorder events, media articles, and opportunities using "Move Up ↑" and "Move Down ↓" buttons before generating the newsletter.

Changes

Implemented reordering controls in frontend/index.html:

1. Added CSS styles for the reorder button container and individual move buttons with hover effects
2. Created createReorderButtons() function that generates a pair of Move Up/Move Down buttons with DOM manipulation logic
3. Updated form creation functions (addEventForm(), addArticleForm(), addOpportunityForm()) to include the reorder buttons for each item

How It Works

• Move Up: Moves the current item above the previous item in the list
• Move Down: Moves the current item below the next item in the list
• The order is automatically preserved when collecting data for newsletter generation, as items are read in DOM order

Screenshots

Interface showing reorder buttons on each item:

After clicking "Move Down" on the first event (order changed from "First Event, Second Event, Third Event" to "Second Event, First Event, Third Event"):

Benefits

• Users can now customize the order of items to match their preferences
• Simple and intuitive UI with clear visual feedback
• Consistent behavior across all three sections (Events, Media Articles, Opportunities)
• Minimal code changes (57 lines added to a single file)

Original prompt

Add a reordering functionality for events, media and opportunities in the frontend please.

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