update

backend/models.py

@@ -31,6 +31,12 @@ class BausteineCreateRequest(BaseModel):
     source_type: SourceType = "thema"
     source_ort: str = Field(default="", max_length=2000)
     ab_phase: int | None = Field(default=None, ge=1, le=9)  # Re-Run ab grober Phase (Position in _phasen(topic), 1-based; bis 9: …Gliederung/Fragen/Artefakte); None = Resume/Fortsetzen ohne Löschen
+    ab_step: int | None = Field(default=None, ge=0)  # Re-Run ab feinem Teilschritt (0-basierter Index in _bausteine_steps); hat Vorrang vor ab_phase
+
+
+class BausteineResetStepRequest(BaseModel):
+    topic: str = Field(min_length=1, max_length=100)
+    ab_step: int = Field(ge=0)  # NUR zurücksetzen ab diesem Teilschritt (kein Neu-Generieren)
 
 
 class BausteineStep(BaseModel):
@@ -38,6 +44,12 @@ class BausteineStep(BaseModel):
     state: Literal["done", "active", "pending"]
 
 
+class BausteineFeinStep(BaseModel):
+    label: str
+    phase: str = ""
+    state: Literal["done", "active", "pending"]
+
+
 class BausteineStatusResponse(BaseModel):
     ready: bool
     generating: bool
@@ -45,6 +57,7 @@ class BausteineStatusResponse(BaseModel):
     error: str | None = None
     partial: bool = False
     steps: list[BausteineStep] = []
+    feine_steps: list[BausteineFeinStep] = []
 
 
 class ProjectResponse(BaseModel):