Initial TrueGrowth source import

openspec/changes/add-ai-input-paste-images/specs/ai-input-bar/spec.md

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+## ADDED Requirements
+
+### Requirement: AI Input Bar Clipboard Image Paste
+
+`AIInputBar` SHALL accept image files from the system clipboard when the user is interacting with the input bar.
+
+#### Scenario: Paste image while AI input bar is active
+- **GIVEN** the user has focused the AI input textarea or another control inside `AIInputBar`
+- **WHEN** the user pastes one or more clipboard image items
+- **THEN** `AIInputBar` SHALL intercept the paste event
+- **AND** add the pasted image resources to the input content preview
+- **AND** keep them available for the next generation request as reference images
+
+#### Scenario: Ignore paste outside AI input bar
+- **GIVEN** the user focus is outside `AIInputBar`
+- **WHEN** the user pastes clipboard image items
+- **THEN** `AIInputBar` SHALL NOT import those images
+
+### Requirement: Unified Local Image Intake Rules
+
+Images entering `AIInputBar` from file selection or clipboard SHALL follow the same validation and processing rules.
+
+#### Scenario: Reject unsupported clipboard content
+- **GIVEN** the clipboard contains text or non-image files only
+- **WHEN** the user pastes into `AIInputBar`
+- **THEN** the existing text paste behavior SHALL remain unchanged
+- **AND** no image preview item SHALL be added
+
+#### Scenario: Apply existing image constraints
+- **GIVEN** the user adds a local image through upload or paste
+- **WHEN** the image exceeds the configured threshold for compression but is still within the supported size limit
+- **THEN** the image SHALL be compressed before being attached
+- **AND** the processed image SHALL be used for preview and generation
+
+#### Scenario: Reject oversized image
+- **GIVEN** the user adds a local image through upload or paste
+- **WHEN** the image exceeds the supported maximum file size
+- **THEN** the image SHALL be rejected
+- **AND** the user SHALL receive an error message
+
+### Requirement: Asset Library And Workflow Integration
+
+Pasted images SHALL integrate with the existing asset library and workflow submission flow in the same way as uploaded images.
+
+#### Scenario: Persist pasted image into asset library
+- **GIVEN** the user pastes an image into `AIInputBar`
+- **WHEN** the image is accepted by validation
+- **THEN** the image SHALL be added to the asset library as a local image asset
+
+#### Scenario: Reuse pasted image during generation
+- **GIVEN** the user has pasted one or more images into `AIInputBar`
+- **WHEN** the user submits a generation request
+- **THEN** the resulting workflow context SHALL include those images as reference inputs
+- **AND** downstream generation services SHALL receive them through the existing reference image pipeline