fix(web): polish Research workspace drawer UI for Saved/Memory tools #347
Description
Parent Epic
#159 — [Epic] Obsidian CLI 集成 — 研究知识管理
Summary
The new Research workspace drawer needs UI polish so Saved/Memory tools feel like a coherent side workspace instead of a raw nested modal stack.
Problems
- drawer header hierarchy is too flat
- tabs do not read like a workspace switcher
- spacing and scroll behavior are cramped when Saved + Obsidian tools are present
- the drawer should carry active scope context more clearly
Acceptance Criteria
- Drawer header includes a clearer title/description and active scope context
- Saved/Memory tabs read as a deliberate workspace switcher
- Content region scrolls cleanly without crowding the header
- Obsidian handoff panel remains usable on narrow widths
- Browser verification covers drawer open, tab switch, and Obsidian dialog flow