This change modifies the validation/planning phase to skip the expensive thumbnail generation step in 'getUnifiedMediaState'. Since the planning phase primarily needs file IDs and names to calculate deletions, adoptions, and reorders, skipping the thumbnail verification/retrieval (including sidecar checks) significantly reduces the latency of the 'Save Changes' operation.
This major refactor addresses improper image matching and duplication:
- Implemented strict ID-based matching in 'MediaService', removing the greedy filename matching fallback.
- Redesigned synchronization pipeline to treat Google Drive as the Source of Truth, supporting orphan adoption (Shopify -> Drive) and secure uploads.
- Implemented 'gallery_order' using Drive file properties (supporting both v2 and v3 APIs) for stable, drag-and-drop global ordering.
- Added conditional file renaming using timestamps to enforce '_' naming convention without unnecessary renames.
- Fixed runtime errors in 'MediaService' loops and updated 'ShopifyMediaService' GraphQL mutations to match correctly schema.
- Rewrote 'MediaService.test.ts' with robust test cases for strict matching, adoption, sorting, and reordering.
- Implement DriveService and ShopifyMediaService for backend operations
- Create MediaSidebar.html with premium UI and auto-polling
- Integrate Google Picker API for robust file selection
- Orchestrate sync logic via MediaService (Drive -> Staged Upload -> Shopify)
- Add secure config handling for API keys and tokens
- Update ppsscript.json with required OAuth scopes
- Update MEMORY.md and README.md with architecture details
