[WC-3429] Complete LeafletMap MobX migration with ViewModel

[iobuhov]

Pull request type

Refactoring (e.g. file rename, variable rename, etc.)

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Description

This PR completes the MobX migration for the LeafletMap component by:

Key Changes:

• ✨ Created LeafletMapViewModel to handle all map logic with MobX reactions
• 🔨 Simplified LeafletMap.tsx component (removed 184 lines) to focus on rendering
• 📦 Extracted marker creation logic into src/utils/leaflet-markers.ts
• 🏗️ Set up proper DI with useLeafletMapVM injection hook
• 🧪 Updated tests to work with new ViewModel architecture
• 🎨 Fixed all linting issues (import ordering, return types)

Architecture:

• ViewModel (LeafletMapViewModel): Manages map instance, tile layer, markers, and reactivity
• Component (LeafletMap): Pure presentational component using ref callback for setup
• Services: Integrated with LocationResolverService and CurrentLocationService
• Reactive updates: MobX reaction syncs markers when locations change

Testing:

• ✅ All 90 tests passing
• ✅ 87% code coverage maintained
• ✅ Linting clean (no errors or warnings)

Impact:

• 18 files changed
• 311 insertions(+), 284 deletions(-)
• Better separation of concerns
• More maintainable and testable code

This PR builds on the existing MobX infrastructure and completes the migration started in the parent branch.

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What should be covered while testing?

1. Map Rendering: Verify the map renders correctly with markers
2. Marker Updates: Check that markers update reactively when data changes
3. Auto Zoom: Test automatic zoom behavior with multiple markers
4. Manual Zoom: Verify manual zoom controls work correctly
5. Current Location: Test current location marker appears and updates
6. Map Interactions: Drag, scroll, and zoom controls function properly
7. Different Providers: Test with both OpenStreetMap and other providers

Test in Mendix Studio Pro:

• Add Maps widget to a page with data source
• Verify markers appear at correct locations
• Test adding/removing markers dynamically
• Check zoom and pan behavior
• Verify no console errors or memory leaks

[iobuhov]

Closing this PR from fork. Reopening from main repo branch for easier collaboration.