v0.1.32 - Mix Calculator search, ingredient categories, throughput tidy-up

- Mix Calculator: searchable Mix Name picker (mirrors Throughput search)
- Ingredients Editor: add manual Category column; used to order Mix Calculator output
- Mix Calculator: surface formula-only mixes (no product yet) via -mix_id sentinel
- Throughput: remove unused For order / For stock destination controls from composer
- Editor change history: show timestamps in local time (stored UTC) instead of raw UTC

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/schemas/editor.py

@@ -188,6 +188,8 @@ class EditorIngredientRow(BaseModel):
     unit_of_measure: str
     kg_per_unit: float
     status: str
+    # Manual grouping used to order ingredients in the Mix Calculator output.
+    category: str | None
     # Decimal places this ingredient is rounded to in the mix calculator output.
     rounding_decimals: int
     notes: str | None
@@ -206,6 +208,7 @@ class EditorIngredientCreate(BaseModel):
     kg_per_unit: float = Field(gt=0)
     status: str = Field(default="active", max_length=32)
     rounding_decimals: int = Field(default=2, ge=0, le=6)
+    category: str | None = Field(default=None, max_length=128)
     notes: str | None = Field(default=None, max_length=2000)
 
 
@@ -218,6 +221,7 @@ class EditorIngredientUpdate(BaseModel):
     kg_per_unit: float | None = Field(default=None, gt=0)
     status: str | None = Field(default=None, max_length=32)
     rounding_decimals: int | None = Field(default=None, ge=0, le=6)
+    category: str | None = Field(default=None, max_length=128)
     notes: str | None = Field(default=None, max_length=2000)
 
 

backend/app/schemas/mix_calculator.py

@@ -27,6 +27,8 @@ class MixCalculatorSessionLineRead(BaseModel):
     mix_percentage: float
     unit: str
     rounding_decimals: int = 2
+    # Manual ingredient grouping used to order the calculator output.
+    category: str | None = None
     sort_order: int