## ADDED Requirements

### Requirement: Extraction mode tracking

The chat page SHALL track whether the current conversation is in extraction mode. Extraction mode is entered when an email is uploaded and exited when the user starts a new chat.

#### Scenario: Enter extraction mode on upload

- **WHEN** the user uploads an email file
- **THEN** the conversation enters extraction mode and subsequent messages are routed to the extraction endpoint

#### Scenario: Exit extraction mode on New Chat

- **WHEN** the user clicks "New Chat" while in extraction mode
- **THEN** the conversation exits extraction mode and returns to general chat routing

### Requirement: Extraction mode visual indicator

The chat page SHALL display a visual indicator when in extraction mode so the user knows their messages are part of an extraction conversation.

#### Scenario: Indicator shown in extraction mode

- **WHEN** the conversation is in extraction mode
- **THEN** a visual indicator (e.g., chip, banner, or subtitle) is visible showing the extraction context

#### Scenario: Indicator hidden in general mode

- **WHEN** the conversation is in general chat mode
- **THEN** no extraction indicator is shown

### Requirement: Follow-up messages route to extraction endpoint

In extraction mode, text messages typed by the user SHALL be sent to the extraction endpoint with the original email HTML and full conversation history, not to the general chat endpoint.

#### Scenario: User replies to disambiguation question

- **WHEN** the agent asks "Which legal entity?" and the user types "1"
- **THEN** the client sends an ExtractionRequest with the original email HTML plus all messages (assistant question + user reply) to `POST /api/chat/extract`

### Requirement: Email upload message in chat

When an email is uploaded, the chat SHALL display a user message indicating the upload (e.g., showing the filename) before the extraction response streams in.

#### Scenario: Upload message displayed

- **WHEN** the user drops "trade_request.html"
- **THEN** a user message appears in the chat like "[Uploaded: trade_request.html]" followed by the streaming extraction response