[bug]: Terminal pane too narrow by default and poor color contrast especially on Windows

[shreyaspapi]

Bug Description

Two things that hurt daily usability for me:

1. Terminal pane is squeezed
It lives in the right sidebar (default 20% of window) and splits 50/50 with file changes. On a laptop that's roughly 10% of screen for agent output — constant line wrapping.

2. Low contrast and readability issues (worse on Windows)

• text-muted-foreground on bg-muted/bg-secondary in dark theme is ~3.5:1 — fails WCAG AA. This color combo is used in 615+ places across the UI (tab labels, sidebar metadata, file change counts, breadcrumbs, etc.)
• Opacity modifiers like text-muted-foreground/60 and /70 drop contrast to 2.0-2.5:1 — used in titlebar breadcrumbs, sidebar labels, browser pane status
• 10px and 11px text combined with muted-foreground in 35+ places (terminal panel, file changes, commit list, skills view)
• Terminal bright-black (#666666) on dark background is ~3.2:1 — fails WCAG AA. Affects dim output from CLI agents
• Monaco editor line numbers fail WCAG AA across all three themes (~3.0-3.3:1)
• global.css has hardcoded dark-mode grays (text-gray-400, text-gray-500, bg-gray-800) that bypass the theme system entirely
• Windows has no platform-specific CSS adjustments. Electron on Windows uses grayscale antialiasing (not subpixel), which makes light-on-dark text appear thinner and lighter. All the above issues are amplified.

Steps to Reproduce

1. Open the app on Windows in dark theme — notice sidebar text, tab labels, and metadata are hard to read
2. Start a task — terminal pane is cramped, agent output wraps heavily
3. Look at file changes, commit history, or any secondary text — muted foreground on muted background blends together
4. Open the app in light theme — hardcoded dark grays from global.css render incorrectly

Actual vs Expected Behavior

Actual: Secondary text across the app fails or barely passes WCAG AA contrast (3.5:1 on muted backgrounds). Terminal gets ~10% of screen.

Expected: Muted foreground should be lightened for dark theme (at least 4.5:1 on all backgrounds). Terminal should get more default space. Windows should get font rendering adjustments.

emdash Version

0.4.33

Operating System

Windows