Universal S3 client

[25.8.0] - 2025-08-15 Added Image Thumbnails: Image files now display actual thumbnails instead of generic file icons Supports: JPG, JPEG, PNG, WebP, GIF, BMP, SVG, TIFF, ICO Automatic fallback to generic icon if image fails to load Smart file type detection based on file extensions Multiple View Modes: Added flexible viewing options for file browsing List View: Traditional detailed list with file information Grid 2x2: Large grid layout (120px items) perfect for image previews Grid 3x3: Compact grid layout (80px items) for quick browsing View Toggle Controls: New header controls for switching between view modes List view icon (view-list) 2x2 grid icon (view-grid) 3x3 grid icon (apps) Visual feedback with blue highlight for selected view Grid View Features: File titles displayed as overlay on each grid item File sizes shown for non-folder items Responsive grid layout that adapts to screen width Multi-select support with checkboxes Pull-to-refresh functionality Touch feedback and selection states Title Visibility Toggle: Eye icon to show/hide file titles in grid view Only appears in grid modes (2x2 and 3x3) Default: titles shown Clean, minimalist view when titles are hidden Better icon centering when titles are hidden Copy Current Path: New button to copy the current folder path to clipboard Copies in S3 URI format (e.g., s3://bucket-name/folder/path/) Smart path formatting with proper handling of root directory User confirmation dialog showing the copied path UI Improvements: Removed redundant bucket name from second header Better header organization and spacing Consistent button styling and spacing Improved visual hierarchy Technical Improvements New Components: ImageThumbnail.tsx: Displays image thumbnails with fallback GridFileItem.tsx: Individual grid item component with title overlay GridView.tsx: Grid layout container with responsive columns fileUtils.ts: Utility functions for file type detection Enhanced State Management: View mode state (list, grid2, grid3) Title visibility state for grid views Improved item selection handling TypeScript Enhancements: Full type safety for all new components Proper interface definitions for props Enhanced error handling Cross-Bucket Copy & Paste: Advanced clipboard functionality for copying files between different buckets and providers Copy files from one S3 provider and paste to another Intelligent context handling with provider and bucket information Enhanced S3 operations for cross-provider file transfers Streamlined clipboard management with dedicated context system Enhanced Image Preview: Improved image handling across all S3-compatible providers Consistent signed URL usage for secure image thumbnails Better compatibility with non-AWS S3 providers (Hetzner, Cloudflare R2, etc.) Improved error handling and fallback mechanisms Enhanced image loading performance and reliability Grid View Enhancements: Improved overlay text positioning on grid item images Dynamic item sizing with optimized spacing Smart title display logic (folders and non-image files show titles by default) Better visual styling and layout consistency Enhanced touch feedback and selection states Enhanced Clipboard Path Copy: Extended functionality for copying current folder paths Improved integration with existing copy operations Better path formatting and validation Enhanced user feedback and confirmation dialogs Legacy Migration Support: Automatic migration system for legacy S3 provider configurations Seamless upgrade path from older storage formats Comprehensive migration guide documentation Backward compatibility preservation Security Improvements: Enhanced secure storage implementation Switched to Calendar Versioning (CalVer) format: YY.M.MICRO Improved header layout and organization Enhanced file list rendering with conditional view modes Better separation of concerns with modular components

- Fix provider limit by storing each provider individually in the Secure Store (sorry it may remove existing providers) - Minor fixes