---
id: task-012
title: Dark Mode Theme
status: Done
assignee: []
created_date: '2025-12-03'
updated_date: '2025-12-04 06:29'
labels:
  - feature
  - ui
  - theme
dependencies: []
priority: medium
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
Implement dark mode theme support for the canvas interface.

## Branch Info
- **Branch**: `dark-mode`
<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria
<!-- AC:BEGIN -->
- [x] #1 Create dark theme colors
- [x] #2 Add theme toggle
- [x] #3 Persist user preference
- [x] #4 System theme detection
<!-- AC:END -->

## Implementation Notes

<!-- SECTION:NOTES:BEGIN -->
## Implementation Complete (2025-12-03)

### Components Updated:

1. **Mycelial Intelligence (MI) Bar** (`src/ui/MycelialIntelligenceBar.tsx`)
   - Added dark mode color palette with automatic switching based on `isDark` state
   - Dark backgrounds, lighter text, adjusted shadows
   - Inline code blocks use CSS class for proper dark mode styling

2. **Comprehensive CSS Dark Mode** (`src/css/style.css`)
   - Added CSS variables: `--card-bg`, `--input-bg`, `--muted-text`
   - Dark mode styles for: blockquotes, tables, navigation, command palette, MDXEditor, chat containers, form inputs, error/success messages

3. **UserSettingsModal** (`src/ui/UserSettingsModal.tsx`)
   - Added `colors` object with dark/light mode variants
   - Updated all inline styles to use theme-aware colors

4. **StandardizedToolWrapper** (`src/components/StandardizedToolWrapper.tsx`)
   - Added `useIsDarkMode` hook for dark mode detection
   - Updated wrapper backgrounds, shadows, borders, tags styling

5. **Markdown Tool** (`src/shapes/MarkdownShapeUtil.tsx`)
   - Dark mode detection with automatic background switching
   - Fixed scrollbar: vertical only, hidden when not needed
   - Added toolbar minimize/expand button

### Technical Details:
- Automatic detection via `document.documentElement.classList` observer
- CSS variables for base styles that auto-switch in dark mode
- Inline style support with conditional color objects
- Comprehensive coverage of all major UI components and tools
<!-- SECTION:NOTES:END -->
