Add mutation level solver

[flintthatchwood]

Summary

Adds a new Level Solver tab that calculates wild, mutation, and domestic level allocations for a selected species.

Players can enter the wild levels available in their breeding collection, choose whether each stat should reach at least a target value or be maximized, and receive updated allocation suggestions automatically.

Features

• Uses the global species selector
• Supports per-stat At least and Maximize modes
• Accepts fixed wild levels supplied by the player
• Suggests mutation and domestic level allocations
• Enforces even mutation levels because odd mutation allocations are not breed-reachable
• Supports:
  • Server stat multipliers
  • Imprinting
  • Configurable domestic-level limits
  • Per-stat mutation limits
  • Configurable server level caps
• Applies the existing +50 level-cap heuristic for X- and R-variant species
• Recalculates asynchronously as inputs change
• Allows copying the resulting allocation directly to Stat Testing

UI

• Adds the Level Solver immediately after the Breeding Plan tab
• Uses stable font- and DPI-aware column sizing
• Keeps solver columns from resizing as results change
• Displays only stats used by the selected species

Implementation

The optimization logic is kept in a separate LevelAllocationSolver class so it can be tested independently of WinForms.

The solver searches domestic allocations, determines the minimum mutations required for target stats, and spends remaining levels on prioritized maximize stats while respecting the configured total-level cap.

Testing

• Added focused tests for target allocation, maximizing, imprinting, caps, mutation constraints, cancellation, and species level-cap handling
• 13 focused solver tests passing
• Application project builds successfully