Fix transpiler validation and improve error messages

[sensei-hacker]

User description

Summary

Improves JavaScript Programming transpiler validation to catch invalid code with helpful error messages instead of silently dropping code or failing with cryptic messages.

Changes

Validation Improvements:

• Invalid function calls now generate clear parser errors (e.g., inav.override.flightAxis(180))
• Intermediate object usage detected at semantic analysis stage
• Category-only access caught (e.g., inav.flight without a property)

Error Message Enhancements:

• Shows available properties for intermediate objects
• Provides actionable suggestions (e.g., "Did you mean: inav.override.vtx.power, inav.override.vtx.band, ...")
• Differentiates between simple and deeply nested objects

Test Coverage:

• Added test_examples.mjs - regression test for all 22 examples
• Added test_validation_fixes.mjs - tests for new validation features
• All 28 existing test suites still pass

i18n Fixes:

• Fixed missing introductory text in JavaScript Programming tab
• Fixed paragraph spacing for warning text

Files Changed

• js/transpiler/transpiler/parser.js - Invalid function call detection
• js/transpiler/transpiler/analyzer.js - Improved error messages for assignments
• js/transpiler/transpiler/property_access_checker.js - Enhanced intermediate object detection
• js/transpiler/transpiler/index.js - Fail transpilation on parser errors
• tabs/javascript_programming.js & .html - i18n display fixes
• locale/en/messages.json - i18n text
• test_examples.mjs & test_validation_fixes.mjs - New test files

Testing

• ✅ All 28 existing transpiler test suites pass
• ✅ All 22 example code snippets compile without errors
• ✅ All 8 validation test cases pass
• ✅ Manually tested in Configurator UI

Examples

Before: inav.override.vtx = 3; silently fails or shows "Cannot assign to 'inav.override.vtx'. Not a valid INAV writable property."

After: Clear error: "Cannot assign to 'inav.override.vtx' - it's an object, not a property. Available properties: inav.override.vtx.power, inav.override.vtx.band, inav.override.vtx.channel"

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PR Type

Bug fix, Enhancement

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Description

This description is generated by an AI tool. It may have inaccuracies

• Detects invalid function calls and intermediate object usage with clear error messages instead of silently dropping code

• Improves error messages by showing available properties for nested objects and suggesting correct access patterns

• Fails transpilation when parser errors occur, preventing invalid code from compiling

• Adds comprehensive test coverage with regression tests for all 22 examples and 8 validation scenarios

• Fixes missing i18n localization in JavaScript Programming tab and improves paragraph spacing

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Diagram Walkthrough

flowchart LR
  Parser["Parser detects<br/>invalid function calls"]
  Analyzer["Analyzer checks<br/>intermediate objects"]
  PropertyChecker["PropertyAccessChecker<br/>validates property paths"]
  ErrorMessages["Generate helpful<br/>error messages"]
  Transpiler["Transpiler fails<br/>on parser errors"]
  Tests["Regression tests<br/>validate fixes"]
  
  Parser -->|"extractCalleeNameForError"| ErrorMessages
  Analyzer -->|"getImprovedWritabilityError"| ErrorMessages
  PropertyChecker -->|"isPropertyAnObject"| ErrorMessages
  ErrorMessages -->|"categorizeWarnings"| Transpiler
  Transpiler -->|"throw on errors"| Tests

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File Walkthrough

	Relevant files
Bug fix	4 files parser.js Detect invalid function calls with error reporting              +37/-0    index.js Fail transpilation when parser errors present                        +12/-1    javascript_programming.js Add i18n localization to tab initialization                            +5/-0      javascript_programming.html Fix paragraph spacing in warning text                                        +4/-0
Enhancement	2 files analyzer.js Improve error messages for invalid assignments                      +110/-3  property_access_checker.js Detect intermediate objects and nested property validation +126/-6
Documentation	1 files messages.json Update JavaScript beta warning message text                            +1/-1
Tests	2 files test_examples.mjs Add regression test for all 22 examples                                    +61/-0    test_validation_fixes.mjs Add validation test suite for error detection                        +117/-0

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