fix: improve workbench layout and navigation

[EastSun5566]

Fix UI regressions before beta.4 and improve workbench navigation:

• Improve command palette contrast and enabled states.
• Replace the workspace avatar with a drag handle on hover. Overlay pin controls without reserving label space or overlapping shortcut hints.
• Allow tab drag reorder within a pane, with keyboard menu actions and saved order.
• Connect folder guides across rows and mixed folder/note lists.
• Use single panel dividers, a full-height Settings sidebar, and inset Note Details focus rings.
• Keep editor panels below notifications and dialogs.

Validation: pnpm check (955 tests), Electron smoke (11 tests), and React Doctor (90/100, no errors).

Release PR #119 will be updated after this merges.

Rendered Electron checks

The notification viewport is repositioned only in the overlap test. The test keeps editor and toast z-index values unchanged.

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1 Skipped Deployment

Project	Deployment	Actions	Updated
hackdesk-docs	Ignored		Sep 30, 2026 8:27pm UTC