feat(mobile): long-press to recolor rated areas

[cafca]

Summary

• Replace tap-to-recolor with a 500ms long-press on iOS. Pan + tap fought in the gesture arena and tap rarely won, so existing rated areas couldn't be reliably recolored from a different brush color.
• Long-press resolves the feature under the finger via queryRenderedFeatures and submits a recolor through the existing target_id paint path (no backend or API changes).
• Medium haptic fires at recolor dispatch via AppHaptics.recolor() for immediate confirmation.
• Drops the tapFeatureLookup parameter and the <2 points recolor fallback from BrushController.endStroke — short strokes are now no-ops.

Test plan

• just test-mobile (analyze + 177 tests pass)
• just dev-ios-sim — paint an area, switch color, long-press it ~500ms → recolors, haptic on physical device, undo enables
• Drag within 500ms — stroke draws normally; long-press doesn't fire
• Long-press blank map — no-op, no error
• Quick tap on rated area — no-op (intentional change)