Address high memory usage when opening resource tab (fixes#5183) by implementing:
1. Concurrency control: Limit thumbnail generation to 3 concurrent operations using semaphore to prevent memory exhaustion when many images are requested simultaneously
2. S3 optimization: Skip server-side thumbnail generation for S3-stored images by default. S3 images now use presigned URLs directly, avoiding:
- Downloading large images from S3 into server memory
- Decoding and resizing images on the server
- High memory consumption during batch requests
3. Memory management improvements:
- Explicitly clear blob and decoded image from memory after use
- Restructure thumbnail cache check to avoid unnecessary semaphore acquisition
- Double-check pattern to prevent duplicate generation while waiting
This restores the original S3 behavior before commit e4f6345 while maintaining thumbnail support for local/database storage.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Remove work-related terminology by renaming "workspace" to "instance"
across the entire application. This change better reflects that Memos
is a self-hosted tool suitable for personal and non-work use cases.
Breaking Changes:
- API endpoints: /api/v1/workspace/* → /api/v1/instance/*
- gRPC service: WorkspaceService → InstanceService
- Proto types: WorkspaceSetting → InstanceSetting
- Frontend translation keys: workspace-section → instance-section
Backend Changes:
- Renamed proto definitions and regenerated code
- Updated all store layer methods and database drivers
- Renamed service implementations and API handlers
- Updated cache from workspaceSettingCache to instanceSettingCache
Frontend Changes:
- Renamed service client: workspaceServiceClient → instanceServiceClient
- Updated all React components and state management
- Refactored stores: workspace.ts → instance.ts
- Updated all 32 locale translation files
All tests pass and both backend and frontend build successfully.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
