A8多套打包+M4归档+R5多图:存量功能备份

A8 多套交付包(packaging_task.py):
- 修复交付包只打第1条混乱note的bug,按ImageCandidate.strategy分A/B/C组
- 每组生独立note_0N夹(6图+文案.txt),同seq留最新去重,老数据兼容
- task74端到端验:3套各6图,独立agent7项交叉验证全过

M4 归档(tasks.py/exports.py/前端):
- list_tasks加date_from/date_to/product_id筛选+product_name批量填(防N+1)
- 新增exports.py:产品JSON导出+标杆CSV导出(UTF-8 BOM)
- 前端HistoryFilters日期/产品筛选+产品列+打回原因红banner
- response.py加raise_param_error;独立agent验A1/A2/A9通过

R5 产品多图(product_images.py/020迁移/前端):
- product_images表+5端点(上传/列/改场景/设主图/删图)
- 生图按ROLE_SCENE_PREFERENCE选对应场景图,回落primary
- 前端ProductImageManager多图画廊

R6 账号config拆页(settings/):
- 配置页按角色拆/settings(运营+组长+admin)+/config(仅admin)
- Key只显末4位不显余额(守红线)

核销表对齐真实代码状态:D1改稿框/M7裂变/E12评图分纠偏为已完成(曾漏回写)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/alembic/versions/020_product_images_table.py

@@ -0,0 +1,47 @@
+"""create product_images table
+
+Revision ID: 020
+Revises: 019
+Create Date: 2026-06-18
+
+R5 产品多图：一产品多张参考图，每张标 scene 场景类型（primary/scene/
+texture/ingredient/model），生图按分镜 role 选用对应图，取不到回落主图。
+product.image_path 仍保留当主图（向后兼容，零破坏）。
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = "020"
+down_revision = "019"
+branch_labels = None
+depends_on = None
+
+_SCENES = ("primary", "scene", "texture", "ingredient", "model")
+
+
+def upgrade():
+    op.create_table(
+        "product_images",
+        sa.Column("id", sa.BigInteger, primary_key=True, autoincrement=True),
+        sa.Column(
+            "product_id", sa.BigInteger,
+            sa.ForeignKey("products.id", ondelete="CASCADE"),
+            nullable=False,
+        ),
+        sa.Column("path", sa.String(512), nullable=False, comment="绝对路径，worker直接open"),
+        sa.Column(
+            "scene", sa.Enum(*_SCENES, name="productimagescene"),
+            nullable=False, server_default="primary",
+            comment="场景类型：白底主图/使用场景/质地/成分/上脸",
+        ),
+        sa.Column("is_primary", sa.Boolean, nullable=False, server_default=sa.false(),
+                  comment="主图（同步 product.image_path）"),
+        sa.Column("sort_order", sa.Integer, nullable=False, server_default="0"),
+        sa.Column("created_at", sa.DateTime, server_default=sa.func.now(), nullable=False),
+    )
+    op.create_index("idx_product_images_product_id", "product_images", ["product_id"])
+
+
+def downgrade():
+    op.drop_index("idx_product_images_product_id", table_name="product_images")
+    op.drop_table("product_images")