Add Chat Limits Feature

[defsanmith]

Add Chat Limits Feature

Closes #1952

This PR introduces a comprehensive chat limits feature that allows typebot owners to configure limits per day/week/month/total for their typebots. Once the configured limit is reached, new chat sessions are blocked and users see a "bot closed" message. This feature helps manage resource usage and provides better control over typebot interactions.

Changes Made

1. Schema Updates

File: /packages/settings/src/schemas.ts

• Added chatLimitsSchema with validation for chat limits configuration
• Includes isEnabled, limit, and limitType fields
• Supports validation for limit >= 0 (where 0 means unlimited)

2. Constants Updates

File: /packages/settings/src/constants.ts

• Added default chat limits settings in defaultSettings
• Configured with sensible defaults (disabled by default)

3. UI Component Implementation

File: /apps/builder/src/features/settings/components/GeneralSettingsForm.tsx

• Added chat limits configuration section in general settings
• Includes toggle for enabling/disabling chat limits
• Number input for setting the limit value
• Dropdown for selecting limit type (daily/weekly/monthly/total)
• Proper form validation and state management

4. Translation Support

File: /apps/builder/src/i18n/en.json

• Added comprehensive translations for chat limits UI
• Includes labels for all form fields and descriptions
• User-friendly messaging for limit types and configurations

5. Backend Logic Implementation

File: /packages/bot-engine/src/startSession.ts

• Implemented chat limits checking logic in session startup
• Supports all limit types: daily, weekly, monthly, and total
• Properly handles edge cases (limit = 0 as unlimited, undefined limits)
• Integrates with existing bot closed messaging system
• Uses efficient date-based querying for time-bounded limits

7. Database Query Support

File: /packages/bot-engine/src/queries/countResults.ts

• Added optimized query function for counting results
• Supports optional date filtering for time-based limits
• Excludes archived results from counts
• Efficient database querying with proper indexing

8. Comprehensive Test Coverage

File: /apps/viewer/src/test/chatLimits.spec.ts

• Complete test suite following Playwright patterns used in codebase
• Uses createTypebots() helper function for consistent test setup
• Uses parseDefaultGroupWithBlock() for proper typebot structure
• Comprehensive test coverage for all scenarios:
  • Disabled chat limits (should allow unlimited chats)
  • Daily limits (with proper date boundary testing)
  • Weekly limits (with week calculation verification)
  • Monthly limits (with month boundary testing)
  • Total limits (cumulative across all time)
  • Edge cases (limit = 0, undefined limit, archived results)
  • Custom bot closed messages
• Verifies proper bot closure behavior when limits are exceeded

[vercel]

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[defsanmith]

@baptisteArno

Please note that these changes do not change the isClosed state of the Typebot to true, allowing it to accept responses after the specified period.