Desktop BrowserWindow minWidth of 840 breaks half-screen tiling on scaled displays

Open apps/desktop/src/window/DesktopWindow.ts around line 398 and inspect how the main BrowserWindow minimum dimensions are defined. Lower the native minimum width as requested, then verify that the desktop window can tile to half-screen on scaled displays while retaining the stated minimum height.

Summary

The desktop app's main BrowserWindow is created with minWidth: 840 (currently around line 398 in apps/desktop/src/window/DesktopWindow.ts). This prevents the window from being tiled/snapped to exactly half of the screen on a large number of real-world displays, because the logical (post-DPI-scaling) half-screen width is often below 840px — even on physically large or high-resolution monitors.

This is not a window-manager quirk or an inherent Electron limitation: other Electron apps (e.g. Claude Code, Codex) tile correctly to half-screen on the same machines. The web version of T3 Code also has no such restriction, since it has no native window minimum.

Repro data across multiple machines

• KDE Linux, 1920 physical px @ 125% scaling → 1536 logical px → half-screen = 768 logical px. Falls short of 840.
• Windows, Dell XPS 17 (3840×2400 physical) @ 250% scaling → 1536 logical px → half-screen = 768 logical px. Falls short of 840, despite the panel being physically very large.

In both cases the issue is the same: logical half-screen width < 840, driven by the display's scaling factor, not the physical screen size. A physically huge 4K panel can still fail this check if scaling is high enough — which is common.

Why this matters for accessibility, not just small screens

DPI/text scaling isn't only used on small or old displays — many users, including older developers or those with reduced vision, deliberately run higher scaling factors (125–250%) on larger monitors for readable text. Assuming "large physical monitor = enough logical width" doesn't hold for this group. A high minWidth effectively punishes users who scale up for legibility by breaking basic window tiling for them.

Requested change

Lower the native minimum width, e.g.:

- minWidth: 840,
+ minWidth: 600,
  minHeight: 620,

600 comfortably fits half-screen tiling in both scaled scenarios above while still leaving room for the app's UI. Alternatively, consider exposing this as a user-configurable setting rather than a hardcoded constant, since ideal minimums will vary by user/display.

Related

• #8849 — Text clipped on right edge when window is tiled narrower than 840px (Wayland/Linux)
• #861 — Desktop app appears too small on high-DPI displays on Windows/Linux