feat: create generic kanban board component (issue #545)

[konard]

Summary

• Created a reusable KanbanBoard JavaScript component in kanban/kanban.html
• Supports configurable data sources, field mappings, and status mappings
• Implements drag-and-drop status changes with API integration

Implementation Details

Extensible Configuration Format

var kanban = new KanbanBoard('kanban-container', {
    dataSource: {
        type: 'report',  // 'report' or 'object'
        endpoint: 'report/Мой%20канбан?JSON',
        tableId: '291'   // Required for object type
    },
    statuses: {
        endpoint: 'report/Статусы?JSON_KV'
    },
    fieldMapping: {
        title: 'Карточка',      // or 'Проект', 'Клиент', 'Лид'
        description: 'Описание',
        contact: 'Контакт',
        status: 'Статус',
        statusId: 'СтатусID',
        date: 'Дата',
        phone: 'Телефон',
        email: 'Email',
        amount: 'Сумма',
        activity: 'Activity',
        cardId: 'ID'
    },
    statusMapping: {
        name: 'Статус',
        id: 'СтатусID',
        color: 'Цвет'
    }
});

Features

• Two Data Source Types: Support for both report (report/{name}?JSON) and object (object/{id}?JSON_OBJ with metadata/{id})
• Field Mapping: Configurable mapping of kanban card parameters to data source field names
• Status Loading: Loads statuses from configurable endpoint with ID, name, and color support
• Drag-and-Drop: Cards can be dragged between columns to change status
• API Integration: Status changes call _m_set/{cardId}?JSON with t{statusFieldId}={newStatusId} and t{activityFieldId}={timestamp}
• Contact Icons: Phone and email icons with click-to-copy functionality
• Card Sorting: Cards sorted by Activity field (descending) within columns
• Sum Calculation: Total sum displayed in column headers
• Full Height: Kanban fills parent container height

Test Plan

• Verify kanban loads data from report endpoint
• Verify kanban loads data from object endpoint with metadata
• Test drag-and-drop status changes
• Verify API call format for status updates
• Test phone/email copy-to-clipboard functionality
• Verify card sorting by Activity field
• Check column sum calculation

Fixes #545

🤖 Generated with Claude Code

[konard]

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[konard]

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