Initial TrueGrowth source import

openspec/specs/canvas-text-to-speech-toolbar/spec.md

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+# canvas-text-to-speech-toolbar Specification
+
+## Purpose
+TBD - created by archiving change add-canvas-text-to-speech-toolbar. Update Purpose after archive.
+## Requirements
+### Requirement: Canvas popup toolbar text-to-speech
+The system SHALL expose a text-to-speech action in the canvas popup toolbar when the current selection contains readable text or markdown content.
+
+#### Scenario: Read a selected text element
+- **GIVEN** the user has selected a text-bearing canvas element
+- **WHEN** the popup toolbar is shown
+- **THEN** the toolbar SHALL display a text-to-speech action
+- **AND** activating the action SHALL read the selected element content aloud
+
+#### Scenario: Prefer card text selection over full card content
+- **GIVEN** the user has selected a card element with markdown content
+- **AND** the user has highlighted a portion of text inside the card body
+- **WHEN** the text-to-speech action is activated
+- **THEN** the system SHALL read the highlighted text instead of the full card content
+
+#### Scenario: Toggle pause and resume while speaking
+- **GIVEN** the canvas text-to-speech action is currently reading content aloud
+- **WHEN** the user activates the same action again
+- **THEN** the system SHALL pause the current reading
+- **AND** a subsequent activation SHALL resume the same reading session
+