…late loading logic; enhance ListView with empty state and image preview; refactor template loading in TemplatesDropdown and TemplatesLibraryView; introduce transformation converter functions

Co-authored-by: Copilot <copilot@github.com>

…mplate handling with canvas dimensions; update UI components to support mode-specific behavior

Co-authored-by: Copilot <copilot@github.com>

…mplement setCanvas action to update canvas dimensions and background

Co-authored-by: Copilot <copilot@github.com>

… ListView to show checker backdrop for canvas mode

- Refactor TransformationConfigSidebar to manage variable bindings and state.
- Add VariableField component for rendering variable inputs with validation.
- Implement variable resolution in transformation conversion logic.
- Create utility functions for variable management, including name generation and resolution.
- Enhance transformation converter to handle variable overrides during URL building.
- Update index exports to include new variable-related components and utilities.

Co-authored-by: Copilot <copilot@github.com>

…reference

Co-authored-by: Copilot <copilot@github.com>

…dRenderer components

Co-authored-by: Copilot <copilot@github.com>

…ionFieldRenderer components

…or support in transformation schema

Co-authored-by: Copilot <copilot@github.com>

…sformation schema

Co-authored-by: Copilot <copilot@github.com>

… mapping details

Co-authored-by: Copilot <copilot@github.com>

- Introduced a new `children` property in the Transformation interface to allow nested layers for image, text, and canvas transformations.
- Implemented depth management for nested transformations in the SortableTransformationItem component, enabling drag-and-drop functionality for child layers.
- Updated the TransformationConfigSidebar to handle adding child transformations, ensuring they are appended to the correct parent layer.
- Enhanced the TransformationTypeSidebar to restrict transformation options when in child add mode, allowing only valid layer types.
- Added a canvas layer transformation type with specific properties and validation, including background color, dimensions, and positioning.
- Updated serialization logic to correctly handle nested transformations when persisting to storage.
- Implemented recursive functions to manage visibility and updates for nested transformations in the editor store.

Co-authored-by: Copilot <copilot@github.com>

…oved button accessibility and hover effects

…ion logic

Co-authored-by: Copilot <copilot@github.com>

…s mode

Co-authored-by: Copilot <copilot@github.com>

… listVariables and buildVariablesSchema

Co-authored-by: Copilot <copilot@github.com>

…rmation fields

- Introduced `nonVariablizable` property to prevent certain fields from being variablized, ensuring correct behavior for fields like background type and crop mode.
- Added utility functions for nested value manipulation (`getNestedValue`, `setNestedValue`) to streamline handling of complex data structures.
- Implemented `replaceVariableRefsWithDefaults` to facilitate the use of default values in forms, improving validation and user experience.
- Enhanced the transformation config sidebar to validate default values and display errors for invalid configurations.
- Added comprehensive tests for variable handling, ensuring backward compatibility with legacy variable formats.
- Updated variable interface to include `defaultValue` and `description`, providing clearer documentation and usability.

…ay in ActionBar

…hild key validation

…r for consistent UI

…mmodate new schema branches

…large/shrink variants

…stead of name

… and adjust canvas mode handling

…istortPerspectiveInput, GradientPicker, and ZoomInput components

…to ensure unique names during save operations

…Status component

Collapse the two-click popover affordance into a single inline Save
button + persistent status label. The button always shows the current
state at a glance and removes the timer-driven "Saved to library"
toast: there is no transient confirmation any more, just one of
{Access required, Save failed, apply-first hint, Unsaved local changes}
shown in a fixed slot to the right of the button (mutually exclusive,
no layout shift).

- TemplateStatus.tsx: drop popover, notification timers, and the
  isInteractive lockout; render Button + status Text driven directly
  by store selectors (syncStatus, isPristine, transformationConfig
  FormDirty, hasPendingLocalWork, templateStorageWriteBlocked).
  Early-return when pristine with no pending work or error so the
  control stays hidden until the user has something to save.
- TemplateStatus.test.tsx: rewrite the UI block as one focused test
  per documented state (pristine-hidden, clean, unsaved, apply-first,
  permission-error, generic-error, saving, click-saves). Drop
  vestigial vi.advanceTimersByTime(3500) calls and "notification
  settle"/"toast fades" wording left over from the old timer model.
  Keep the store/autosave probe tests intact.

…elp text