v1.0.5 — major update

NEW
- Multi-window save and restore (was single-window)
- Save-time discard: RAM drops the moment you save, not on restore
- Snapshot history per session (up to 10 prior states) with one-click rollback dropdown in the detail view
- Tags and per-session foreground/background colors, with a tag filter at the top of the popup
- Auto-save: pick a target session and an interval (30 sec / 1 min / 5 min / 15 min), live window saves itself in the background
- Restore mode settings: choose whether restored tabs come back sleeping, and whether existing windows close on restore
- Settings gear icon in the popup header for fast access to options
- Inline delete confirmation instead of blocking dialog
- Optional folder backup: each session as one JSON file
- Single-file JSON export and import

UI
- New extension icon (stacked windows + amber Z)
- Tighter, less-overwhelming Options page
- Clearer session detail view with rollback dropdown grouped with the Restore button

This is the biggest update since the original release. Same free-forever, no-account, no-cloud promise.