Implement display artifacts, pricing integrity, draft base and publish preview bundle

backend/app/schemas/publish_preview.py

@@ -0,0 +1,50 @@
+from pydantic import BaseModel, Field
+
+
+class RemapPreviewRequest(BaseModel):
+    seat_record_ids: list[str] | None = Field(default=None, max_length=500)
+    from_sector_id: str | None = Field(default=None, max_length=128)
+    to_sector_id: str | None = Field(default=None, max_length=128)
+    from_group_id: str | None = Field(default=None, max_length=128)
+    to_group_id: str | None = Field(default=None, max_length=128)
+
+
+class RemapPreviewSeatItem(BaseModel):
+    seat_record_id: str
+    seat_id: str | None
+    before_sector_id: str | None
+    after_sector_id: str | None
+    before_group_id: str | None
+    after_group_id: str | None
+
+
+class RemapPreviewResponse(BaseModel):
+    scheme_id: str
+    scheme_version_id: str
+    matched_count: int
+    items: list[RemapPreviewSeatItem]
+
+
+class RemapApplyRequest(BaseModel):
+    seat_record_ids: list[str] | None = Field(default=None, max_length=500)
+    from_sector_id: str | None = Field(default=None, max_length=128)
+    to_sector_id: str | None = Field(default=None, max_length=128)
+    from_group_id: str | None = Field(default=None, max_length=128)
+    to_group_id: str | None = Field(default=None, max_length=128)
+
+
+class RemapApplyResponse(BaseModel):
+    scheme_id: str
+    scheme_version_id: str
+    updated_count: int
+    items: list[RemapPreviewSeatItem]
+
+
+class PublishPreviewResponse(BaseModel):
+    scheme_id: str
+    scheme_version_id: str
+    artifacts: dict
+    validation: dict
+    structure_diff: dict
+    pricing_coverage: dict
+    summary: dict