* Implement array expression helper for number arrays in JS mode
- Add showArrayExprPicker state to manage helper UI
- Add shouldShowArrayHelper() to check conditions (JS mode + number array)
- Add 'Add item' button that shows picker UI when clicked
- Implement picker row with disabled input, FlowPlugConnect, and Cancel button
- Connect callback sets array expression [property] and updates Monaco editor
- Include helpful text and proper cleanup on cancel/connect
* Enhance array expression helper to append items to existing arrays
- Check if current expr is already an array expression [...]
- If it is, append new item to existing content: [existing, newItem]
- If not or empty, create new array with single item: [newItem]
- Update helper text to reflect append behavior
- Maintains backward compatibility with non-array expressions
* Add S3 resource array helper for JavaScript mode
- Add shouldShowS3ArrayHelper() function to detect S3 resource arrays
- Show direct FlowPlugConnect for S3 arrays instead of Add item button
- Apply same append logic: add to existing array or create new one
- Include helpful text explaining S3 resource connection
- Support both s3_object and s3object resourceType variants
* Add S3 resource catalog helper for static mode arrays
- Add shouldShowS3ArrayStaticHelper() to detect S3 arrays in static mode
- Show 'Add an object from the catalog' button below static S3 array inputs
- Button switches to JavaScript mode and immediately activates connect mode
- Sets initial empty array [] then replaces with [selectedPath] when connected
- Includes helpful text explaining the mode switch and connection
* Fix reactivity issue when switching from static to JS mode
- Make button click handler async and await tick() before activating connect mode
- Add Monaco editor update after setting expression in connect callback
- Use tick().then() to ensure Monaco is available before calling setCode()
- This ensures the SimpleEditor displays the new array expression immediately
* Add plug icon to 'Add object from an expression' button
- Import Plug icon from lucide-svelte
- Add startIcon with Plug to the S3 array static helper button
- Makes the button visually consistent with other connection-related UI elements
* Unify S3 resource button style across static and JS modes
- Replace 'Add S3 resource:' text + FlowPlugConnect with consistent Button style
- Use same variant, color, size, and plug icon as static mode button
- Maintain same functionality but with unified visual appearance
- Both S3 helpers now use identical button styling
* Consolidate and clean up array expression helpers
- Extract appendPathToArrayExpr() to eliminate duplicate array building logic
- Add switchToJsAndConnect() helper for consistent mode switching flow
- Add emitChange() and updateEditor() utilities for consistent updates
- Add safety reset of showArrayExprPicker when switching away from JS mode
- Reduce code duplication across number and S3 array helpers
- Improve maintainability and consistency
* Remove number array helper functionality
- Remove shouldShowArrayHelper() function for number arrays
- Remove showArrayExprPicker state variable and related UI
- Remove number array 'Add item' button and picker interface
- Keep only S3 resource array helpers (static and JS modes)
- Clean up unused safety reset logic for array picker
* Create reusable S3ArrayHelperButton component
- Extract S3 array helper button into dedicated component
- Add consistent styling with Plug icon and configurable label
- Replace both static and JavaScript mode button implementations
- Reduce code duplication and improve maintainability
- Component dispatches click event for parent handling
* cleaning
* Hide S3ArrayHelperButton when in connect mode
- Add connecting prop to S3ArrayHelperButton component
- Hide button when connecting is true to avoid UI clutter
- Pass connecting state from InputTransformForm to both button instances
- Improves UX by removing unnecessary button when plug is already active
* cleaning
* cleaning