feat(formulus-formplayer): Add dynamic choice lists with WHERE clause and age filtering support

[Mishael-2584]

Description

This PR introduces a comprehensive dynamic choice list feature that enables form fields to populate dropdown options dynamically from the local database at runtime. This eliminates the need for static enum values that can become outdated, allowing forms to always display current data.

Key Features

• Dynamic Enum Control: Custom JSON Forms renderer (DynamicEnumControl) that supports x-dynamicEnum schema extension
• Built-in Query Function: getDynamicChoiceList function that queries local observations via the Formulus WebView bridge
• WHERE Clause Support: Advanced filtering using SQL-like WHERE clauses (e.g., data.sex = 'male', age_from_dob(data.dob) >= 18)
• Age Filtering: Special support for age-based queries using age_from_dob(data.dob) function that calculates age from date of birth
• Combined Filters: Support for combining static filter parameters with WHERE clauses
• Form Evaluation Context: New React context (FormEvaluationContext) that provides extension functions to form components
• Comprehensive Documentation: Complete reference guide with examples and troubleshooting

Technical Implementation

• formulus-formplayer:

  • Added DynamicEnumControl.tsx - Custom renderer for dynamic enums
  • Added builtinExtensions.ts - Built-in getDynamicChoiceList function with age calculation logic
  • Added FormEvaluationContext.tsx - Context provider for extension functions
  • Updated App.tsx - Integrated built-in extensions and removed error message display
  • Updated ExtensionsLoader.ts - Support for built-in extension functions

• formulus:

  • Updated FormplayerModal.tsx - Fixed extension base path to /forms directory
  • Updated ExtensionService.ts - Enhanced extension loading logic
  • Updated react-native.config.js - Added webview assets to React Native config
  • Updated android/app/build.gradle - Added JSX and HTML file copying for webview assets

• Documentation:

  • Added DYNAMIC_CHOICE_LISTS.md - Comprehensive 780-line reference guide with examples

What This Enables

Forms can now:

• Query any form type (e.g., hh_person, household) for dropdown options
• Filter by any field using WHERE clauses
• Filter by calculated age from date of birth
• Combine multiple filters (e.g., sex: 'male' + age_from_dob(data.dob) >= 18)
• Display distinct values only
• Use custom value and label fields

Example Usage

{
  "select_person": {
    "type": "string",
    "x-dynamicEnum": {
      "function": "getDynamicChoiceList",
      "query": "hh_person",
      "params": {
        "whereClause": "age_from_dob(data.dob) >= 18 AND data.sex = 'male'"
      },
      "valueField": "observationId",
      "labelField": "data.names"
    }
  }
}

Type of Change

• Bug Fix
• New Feature / Enhancement
• Refactor / Code Cleanup
• Documentation Update
• Maintenance / Chore
• Other (please specify):

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Component(s) Affected

• formulus (React Native mobile app)
• formulus-formplayer (React web app)
• synkronus (Go backend server)
• synkronus-cli (Command-line utility)
• Documentation
• DevOps / CI/CD
• Other:

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Related Issue(s)

Closes/Fixes/Resolves:

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Testing

• Unit tests added/updated
• Integration tests added/updated
• Manually tested
• Tested on multiple platforms (if applicable)
  • Tested on Android via Formulus app
  • Tested with various WHERE clause combinations
  • Tested age filtering with age_from_dob() function
  • Tested combined filters (static params + WHERE clauses)
• Not applicable

Testing Notes

• All dynamic choice list queries tested with test_dynamic form
• Age-based filtering verified with multiple age conditions
• Combined filters (e.g., sex + age) tested and working
• Error handling verified (graceful degradation when API unavailable)

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Breaking Changes

• This PR introduces breaking changes
• This PR does NOT introduce breaking changes

If breaking changes, please describe migration steps:

N/A - This is a purely additive feature. Existing forms continue to work unchanged. The x-dynamicEnum extension is optional and only used when specified in the schema.

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Documentation Updates

• Documentation has been updated
• Documentation update is not required

Documentation Added

• DYNAMIC_CHOICE_LISTS.md: Comprehensive 780-line reference guide including:
  • Quick start guide
  • Basic and advanced usage examples
  • WHERE clause syntax reference
  • Age filtering with age_from_dob() function
  • Combined filter examples
  • Troubleshooting guide
  • Production checklist

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Checklist

• Code follows project style guidelines (formatted with Prettier)
• All existing tests pass
• New tests added for new functionality (manual testing completed)
• PR title follows Conventional Commits format

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Implementation Details

Files Changed

Core Feature Files:

• formulus-formplayer/src/DynamicEnumControl.tsx (359 lines) - Custom renderer
• formulus-formplayer/src/builtinExtensions.ts (583 lines) - Query function with age logic
• formulus-formplayer/src/FormEvaluationContext.tsx (74 lines) - Context provider
• formulus-formplayer/src/App.tsx - Integration and error handling updates
• formulus/src/components/FormplayerModal.tsx - Extension path fix
• formulus/src/services/ExtensionService.ts - Extension loading enhancements
• DYNAMIC_CHOICE_LISTS.md (779 lines) - Complete documentation

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