Wide screen only shows single column layout, very wasteful of horizontal space

[winsphinx]

Pre-submission Checklist

• I have searched existing issues and confirmed this feature has not been requested
• This is a feature request, not a bug report or question

Feature Area

User Interface (UI)

Problem or Use Case

Describe the bug / feature request

After the removal of Masonry layout in #5746, the memo list now only uses a single column layout even on very wide monitors (2560px, 3440px, ultrawide, 4K, etc.).

This makes the interface look extremely sparse and wastes a lot of horizontal space. For users who write many short memos, the single column feels very inefficient compared to the previous masonry/grid view.

Expected behavior

• On wide screens, the memo list should display multiple columns (ideally 3~5 columns, or configurable).
• On smaller screens, it should gracefully fall back to 2 or 1 column.
• Either bring back an improved Masonry layout, or implement a simple responsive multi-column layout using CSS Grid / Multi-column / display: masonry (once widely supported).

Current behavior

• Always single column on desktop, regardless of screen width.
• Very poor space utilization on modern wide/ ultrawide monitors.

Thanks!

Proposed Solution

1. Simple & fast: Use CSS column-count + break-inside: avoid with responsive breakpoints (3~4 columns on wide screens).
2. Better long-term: Add a setting "Memo list columns" or "Layout mode" (Single / Multi-column / Masonry) with configurable min column width.
3. Or use modern display: grid with grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)) for a clean responsive grid.

Alternatives Considered

No response

Additional Context

No response

Contribution

• I'm willing to submit a pull request for this feature