## ADDED Requirements

### Requirement: Editable Transcript Segments
The frontend SHALL display transcribed text as individually editable segments that can be modified without disrupting ongoing transcription.

#### Scenario: Display new segment
- **WHEN** a new transcription segment is received from sidecar
- **THEN** a new editable text block SHALL appear in the transcript area
- **AND** the block SHALL be visually distinct (e.g., border, background)
- **AND** the block SHALL be immediately editable

#### Scenario: Edit existing segment
- **WHEN** user modifies text in a segment
- **THEN** only that segment's local data SHALL be updated
- **AND** new incoming segments SHALL continue to append below
- **AND** the edited segment SHALL show an "edited" indicator

#### Scenario: Save merged transcript
- **WHEN** user clicks Save button
- **THEN** all segments (edited and unedited) SHALL be concatenated in order
- **AND** the merged text SHALL be saved as transcript_blob

### Requirement: Real-time Streaming UI
The frontend SHALL provide clear visual feedback during streaming transcription.

#### Scenario: Recording active indicator
- **WHEN** streaming recording is active
- **THEN** a pulsing recording indicator SHALL be visible
- **AND** the current/active segment SHALL have distinct styling (e.g., highlighted border)
- **AND** the Start Recording button SHALL change to Stop Recording

#### Scenario: Processing indicator
- **WHEN** audio is being processed but no text has appeared yet
- **THEN** a "Processing..." indicator SHALL appear in the active segment area
- **AND** the indicator SHALL disappear when text arrives

#### Scenario: Streaming status display
- **WHEN** streaming session is active
- **THEN** the UI SHALL display segment count (e.g., "Segment 5/5")
- **AND** total recording duration

### Requirement: Audio Streaming IPC
The Electron main process SHALL provide IPC handlers for continuous audio streaming between renderer and sidecar.

#### Scenario: Start streaming
- **WHEN** renderer calls `startRecordingStream()`
- **THEN** main process SHALL send start_stream command to sidecar
- **AND** return session confirmation to renderer

#### Scenario: Stream audio data
- **WHEN** renderer sends audio chunk via `streamAudioChunk(arrayBuffer)`
- **THEN** main process SHALL convert WebM to PCM if needed
- **AND** forward to sidecar stdin as base64-encoded audio_chunk command

#### Scenario: Receive transcription
- **WHEN** sidecar emits a segment result on stdout
- **THEN** main process SHALL parse the JSON
- **AND** forward to renderer via `transcription-segment` IPC event