Add OBS group management feature and documentation

- Add group_name column to teams table for mapping teams to OBS groups
- Create API endpoints for group creation (/api/createGroup) and bulk sync (/api/syncGroups)
- Update teams UI with group status display and creation buttons
- Implement automatic group assignment when adding streams
- Add comprehensive OBS setup documentation (docs/OBS_SETUP.md)
- Fix team list spacing issue with explicit margins
- Update OBS client with group management functions
- Add database migration script for existing deployments

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

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

docs/OBS_SETUP.md

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+# OBS Source Switcher Setup Guide
+
+This document explains how to configure OBS Studio to work with the Source Switcher Plugin UI.
+
+## Prerequisites
+
+1. OBS Studio installed
+2. [OBS WebSocket plugin](https://github.com/obsproject/obs-websocket) (usually included with OBS 28+)
+3. [OBS Source Switcher plugin](https://obsproject.com/forum/resources/source-switcher.1090/) installed
+
+## Required Source Switcher Names
+
+You must create **exactly 7 Source Switcher sources** in OBS with these specific names:
+
+| Source Switcher Name | Screen Position | Text File |
+|---------------------|-----------------|-----------|
+| `ss_large` | Main/Large screen | `large.txt` |
+| `ss_left` | Left screen | `left.txt` |
+| `ss_right` | Right screen | `right.txt` |
+| `ss_top_left` | Top left corner | `topLeft.txt` |
+| `ss_top_right` | Top right corner | `topRight.txt` |
+| `ss_bottom_left` | Bottom left corner | `bottomLeft.txt` |
+| `ss_bottom_right` | Bottom right corner | `bottomRight.txt` |
+
+## Setup Instructions
+
+### 1. Configure OBS WebSocket
+
+1. In OBS, go to **Tools → WebSocket Server Settings**
+2. Enable the WebSocket server
+3. Set a port (default: 4455)
+4. Optionally set a password
+5. Note these settings for your `.env.local` file
+
+### 2. Create Source Switcher Sources
+
+For each screen position:
+
+1. In OBS, click the **+** button in Sources
+2. Select **Source Switcher**
+3. Name it exactly as shown in the table above (e.g., `ss_large`)
+4. Configure the Source Switcher:
+   - **Mode**: Text File
+   - **File Path**: Point to the corresponding text file in your `files` directory
+   - **Switch Behavior**: Choose your preferred transition
+
+### 3. Configure Text File Monitoring
+
+Each Source Switcher should monitor its corresponding text file:
+
+- `ss_large` → monitors `{FILE_DIRECTORY}/large.txt`
+- `ss_left` → monitors `{FILE_DIRECTORY}/left.txt`
+- etc.
+
+Where `{FILE_DIRECTORY}` is the path configured in your `.env.local` file (default: `./files`)
+
+### 4. Add Browser Sources
+
+When you add streams through the UI, browser sources are automatically created in OBS with these settings:
+- **Width**: 1600px
+- **Height**: 900px
+- **Audio**: Controlled via OBS (muted by default)
+
+## How It Works
+
+1. **Stream Selection**: When you select a stream for a screen position in the UI
+2. **File Update**: The app writes the OBS source name to the corresponding text file
+3. **Source Switch**: The Source Switcher detects the file change and switches to that source
+4. **Group Organization**: Streams are organized into OBS groups based on their teams
+
+## Troubleshooting
+
+### Source Switcher not switching
+- Verify the text file path is correct
+- Check that the file is being updated (manually open the .txt file)
+- Ensure Source Switcher is set to "Text File" mode
+
+### Sources not appearing
+- Check OBS WebSocket connection in the footer
+- Verify WebSocket credentials in `.env.local`
+- Ensure the source name doesn't already exist in OBS
+
+### Missing screen positions
+- Verify all 7 Source Switchers are created with exact names
+- Check for typos in source names (they must match exactly)
+
+## Environment Variables
+
+Configure these in your `.env.local` file:
+
+```env
+# OBS WebSocket Settings
+OBS_WEBSOCKET_HOST=127.0.0.1
+OBS_WEBSOCKET_PORT=4455
+OBS_WEBSOCKET_PASSWORD=your_password_here
+
+# File Directory (where text files are stored)
+FILE_DIRECTORY=./files
+```