CMU-313 / nodebb-fall-2025-waffle-warriors / 18411540133 / 1

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Feature #8 - Add a User Polling feature

# Polling System Implementation

## Overview

This PR is for User Story #8 (Adding a polling system). This system allows users to create interactive polls with multiple voting options, real-time results, and comprehensive management features.

## Current Progress

The system is currently fully implemented and thoroughly tested with all polls tests passing. The polling system is complete and ready for use.

## Problem Statement

NodeBB currently lacks native polling functionality, requiring users to rely on third-party plugins or manual workarounds for community voting and surveys. This feature addresses the need for:

- Native poll creation and management
- Real-time vote tracking and results
- Multiple poll types (single/multiple choice)
- Time-limited polls
- Anonymous voting options

## Features Added

### Backend

- __Core Poll Engine__ (`src/polls/index.js`): Complete database operations for poll lifecycle management
- __Web Controllers__ (`src/controllers/polls.js`): Page controllers for poll interaction
- __REST API__ (`src/controllers/api/polls.js`): Full CRUD API for polls with proper authentication
- __Route Integration__: Seamless integration with existing NodeBB routing system

### Frontend

- __Poll Creation Interface__: User-friendly form for creating polls with multiple options
- __Poll Display Pages__: Clean, responsive design for viewing polls and results
- __Real-time Results__: Live updating of vote counts and percentages
- __Voting Interface__: Intuitive voting mechanism with validation
- __Poll Management__: Edit and delete capabilities for poll creators

### Advanced Features

- __Single Choice Support__: Single selection polls (implemented)
- __Anonymous Voting__: Optional anonymous participation (implemented)
- __Time-limited Polls__: Optional expiration dates with countdown timers (not yet implemented)
- __Vote Tracking__: Prevention of duplicate voting with user tracking (implemented)
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