Preferment Maturity Tracking & Refined Yeast Model

This release focuses on fermentation quality and decision support, especially for bakers working with poolish or biga.

• Preferment maturity states added: young, developing, peak, and over-ripe.
• Maturity modeling now adapts to temperature.
• Yeast model recalibrated based on professional baker feedback.
• Yeast recommendations lowered across schedules for longer traditional fermentation profiles.
• Expanded multilingual support across product surfaces.

• Cold-fermentation slider now better accounts for warm phases.
• Fermentation bar highlighting fixed when switching modes.
• Language picker and help modal usability improved.