## ADDED Requirements

### Requirement: Media Upload
The system SHALL provide a web-based media upload feature to allow users to transfer videos and images from their mobile devices or laptops to the Raspberry Pi.

#### Scenario: Successful video upload
- **WHEN** the user selects a `.mp4` file and clicks "Upload"
- **THEN** the system SHALL save the file to `/home/pi/media` and make it available for mapping

### Requirement: Surface Source Assignment
The system SHALL allow the user to assign a specific media file from the library to a selected mapping surface in real-time.

#### Scenario: Assigning an image
- **WHEN** the user selects an image from the "Media Library" in the UI
- **THEN** the backend SHALL send an `/ofxPiMapper/source/set <filename>` OSC message to update the projection
