/implement

Implement a feature with independent verification at each step.

# /implement - Autonomous Feature Implementation

Implement a feature with independent verification at each step.

## Arguments
- $ARGUMENTS: The feature description

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## Configuration

Before starting, confirm the **App URL** for visual verification:
- **App URL:** `http://localhost:5173` (Vite default) or ask user

All other commands are standardized via Makefile:
- `make ci` - runs all checks + E2E tests
- `make dev` - starts dev server

**Note:** Makefile and dependencies are created automatically in Phase 3 if missing.

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## Phase 1: Planning

### 1.1 Create Feature Branch and P...