# 64 - Router Proportion Calculator

**Date:** 2025-12-01
**Task:** TASK-039-9
**Type:** Feature

## Summary

Implemented proportion calculation utilities for pattern detection.

## Changes

### Added
- `server/router/application/analyzers/proportion_calculator.py` - Proportion calculation functions
- `tests/unit/router/application/test_proportion_calculator.py` - 31 unit tests

### Functions
- `calculate_proportions()` - Calculate all proportions from dimensions
- `get_proportion_summary()` - Human-readable description
- `is_phone_like_proportions()` - Check phone shape
- `is_tower_like_proportions()` - Check tower shape
- `is_table_like_proportions()` - Check table shape
- `is_wheel_like_proportions()` - Check wheel shape
- `get_dimensions_from_dict()` - Extract dimensions from various formats

### Calculated Values
- Aspect ratios (xy, xz, yz)
- Shape flags (is_flat, is_tall, is_wide, is_cubic)
- Dominant axis, volume, surface area

## Tests

- 31 new tests for proportion calculator
