Description

Refactor the current hardcoded Catppuccin theme into a flexible, configurable theme system.

Current State

• Colors hardcoded in `pkg/styles/styles.go`
• Single theme (Catppuccin Mocha)
• No user customization

Proposed Architecture

pkg/themes/
├── theme.go          # Theme interface and structs
├── loader.go         # Theme loading from YAML
├── catppuccin.go     # Built-in Catppuccin variants
├── gruvbox.go        # Built-in Gruvbox theme
├── nord.go           # Built-in Nord theme
└── default.go        # Fallback theme

Theme Structure

# ~/.config/lazycurl/themes/my-theme.yml
name: "My Custom Theme"
author: "username"
variant: "dark"  # dark | light

colors:
  # Base colors
  background: "#1e1e2e"
  foreground: "#cdd6f4"
  
  # UI elements
  border: "#45475a"
  selection: "#585b70"
  cursor: "#f5e0dc"
  
  # Syntax
  keyword: "#cba6f7"
  string: "#a6e3a1"
  number: "#fab387"
  
  # HTTP methods
  method_get: "#a6e3a1"
  method_post: "#fab387"
  method_put: "#89b4fa"
  method_delete: "#f38ba8"
  
  # Status codes
  status_2xx: "#a6e3a1"
  status_3xx: "#89b4fa"
  status_4xx: "#fab387"
  status_5xx: "#f38ba8"

Technical Implementation

• Define Theme interface with all color properties
• Create theme loader for YAML files
• Update styles package to use theme colors
• Add theme hot-reload support
• Migrate existing Catppuccin colors to theme format

Acceptance Criteria

• Theme interface defined
• Built-in themes: Catppuccin (Mocha, Latte), Gruvbox, Nord
• Custom themes loadable from YAML
• All UI elements use theme colors
• Theme switchable via config