Ingredient Parser

Huge Ingredient Parser submodule overhaul.

This should

1. Hopefully cope with a ton more ingredient variation - hopefully not too much breakage along the way.
2. Enable the volumetric ingredient matches to be more accurate as there's less noise in the ingredient name.
3. Give the user a better experience - parsing the ingredients should be much easier and simpler now.

• Flags: approx (approx), optional (optional), to-serve (toServe), and to-taste (toTaste) are surfaced and presented as badges.
• Instructions/states are extracted into instructions and removed from ingredient/additional, including truncation cleanups (e.g., “lukewarm” won’t leave “luke” behind).
• Alternatives: ingredient-only alts stay inline on the main line; alts with quantity/unit live in the alternatives array and are shown in the dropdown with badges (ing for ingredient, unit for quantity/unit/system).
• Unit metadata: symbols and unitSystem are preserved across conversions; teaspoons/tablespoons are treated as system-neutral to avoid skewing system detection.
• Multipliers/per-item: per-item quantities appear as a muted tail (e.g., “(per item: 50 g)”) while keeping the main quantity intact.
  UI wiring: segmented Metric / US Vol / Imperial selector, compact toggle row, inline legends, and a chevron panel for alts to display structured alternative data.

Frontend

• These various options reflected in the UI
  • flags with badges
  • alt ingredient+unit/unit on a dropdown line
  • alt ingredient piped against the original ingredient
  • instructions states e.g. boiled, chopped are all shown in smaller text
• added buttons instead of checkboxes on the ingredients, looks a bit cleaner. Default measurement system is now an outlined button
• BUGFIX: the login redirect wasn't working properly
• BUGFIX: the manual screenshot script was hanging on the login page