feat: add commands management feature with API endpoints and UI integration

- Implemented commands routes for listing, enabling, and disabling commands.
- Created commands manager view with accordion groups for better organization.
- Added loading states and confirmation dialogs for enabling/disabling commands.
- Enhanced error handling and user feedback for command operations.
- Introduced CSS styles for commands manager UI components.
- Updated navigation to include commands manager link.
- Refactored existing code for better maintainability and clarity.

.claude/commands/cli/cli-init.md

@@ -3,6 +3,7 @@ name: cli-init
 description: Generate .gemini/ and .qwen/ config directories with settings.json and ignore files based on workspace technology detection
 argument-hint: "[--tool gemini|qwen|all] [--output path] [--preview]"
 allowed-tools: Bash(*), Read(*), Write(*), Glob(*)
+group: cli
 ---
 
 # CLI Initialization Command (/cli:cli-init)

.claude/commands/workflow/plan.md

@@ -3,6 +3,7 @@ name: plan
 description: 5-phase planning workflow with action-planning-agent task generation, outputs IMPL_PLAN.md and task JSONs
 argument-hint: "[-y|--yes] \"text description\"|file.md"
 allowed-tools: SlashCommand(*), TodoWrite(*), Read(*), Bash(*)
+group: workflow
 ---
 
 ## Auto Mode