v0.3.0

What's New

• Toast notifications — clear success/error feedback on actions
• Connection status banner — shows when socket disconnects and reconnects
• Backup restore progress — stage-by-stage tracking (validating, extracting, replacing, done)
• File upload improvements — 100MB size limit with clear errors, multi-file upload progress
• Delete confirmation modal — proper styled modal instead of browser confirm
• Error boundary — clean recovery screen if something crashes
• Accessibility — aria labels on console input, tooltips on truncated file names
• Docker healthcheck + resource limits — production container monitoring and guardrails