## ADDED Requirements

### Requirement: Stopping a session requires confirmation
The system SHALL display a confirmation dialog before stopping a running session.

#### Scenario: User initiates stop
- **WHEN** user clicks the "Stop" button on a running session
- **THEN** a confirmation dialog appears asking "Are you sure you want to stop this session?"
- **AND** the dialog provides "Cancel" and "Stop" options

#### Scenario: User confirms stop
- **WHEN** user clicks "Stop" in the confirmation dialog
- **THEN** the session stops
- **AND** the dialog closes

#### Scenario: User cancels stop
- **WHEN** user clicks "Cancel" in the confirmation dialog
- **THEN** the dialog closes
- **AND** the session remains running

### Requirement: Deleted sessions disappear from UI immediately
The system SHALL update the frontend state immediately after a session is successfully deleted.

#### Scenario: Delete session
- **WHEN** user deletes a session
- **AND** the delete API call returns success
- **THEN** the session is removed from the visible list
- **AND** no page reload is required

#### Scenario: Delete session failure
- **WHEN** user deletes a session
- **AND** the delete API call fails
- **THEN** the session remains in the list
- **AND** an error message is displayed
