feat(admin, miniapp): 优化数据库迁移逻辑与小程序图片资源处理

- 为后端Admin新增migration_compat工具，支持离线迁移时的基线资源检查，重构全部alembic迁移脚本适配离线模式，避免重复创建已存在的数据库表和字段
- 完善初始数据库迁移脚本，添加默认部门种子数据，新增ConciergeAdvisor详情字段从JSON到JSONB的类型转换迁移
- 小程序端新增图片资源解析工具resolveNetworkImage，实现本地静态资源到CDN的自动映射，添加图片加载容错降级机制
- 完善HeroSlide类型定义，新增actionLabel字段，优化首页轮播组件的文本渲染与错误处理逻辑
- 新增对应测试用例验证迁移路径正确性与前端数据处理逻辑
- 新增临时 brainstorm UI对比草稿与开发临时状态文件

WonderQ-Admin/alembic/versions/0001_initial_schema.py

@@ -5,7 +5,10 @@ Revises:
 Create Date: 2026-06-30
 """
 
+from datetime import datetime, timezone
+
 from alembic import context, op
+import sqlalchemy as sa
 from sqlalchemy import inspect
 from app.database import Base
 from app import models  # noqa: F401
@@ -16,6 +19,41 @@ down_revision = None
 branch_labels = None
 depends_on = None
 
+DEFAULT_DEPT_ID = "00000000-0000-0000-0000-000000000001"
+
+
+def _seed_default_department(bind) -> None:
+    department_table = sa.table(
+        "AdminDepartment",
+        sa.column("id", sa.String()),
+        sa.column("name", sa.String()),
+        sa.column("sortOrder", sa.Integer()),
+        sa.column("isActive", sa.Boolean()),
+        sa.column("createdAt", sa.DateTime()),
+        sa.column("updatedAt", sa.DateTime()),
+    )
+    if context.is_offline_mode():
+        should_seed = True
+    else:
+        should_seed = bind.execute(
+            sa.text('SELECT 1 FROM "AdminDepartment" LIMIT 1')
+        ).first() is None
+    if should_seed:
+        timestamp = datetime.now(timezone.utc).replace(tzinfo=None)
+        op.bulk_insert(
+            department_table,
+            [
+                {
+                    "id": DEFAULT_DEPT_ID,
+                    "name": "默认部门",
+                    "sortOrder": 0,
+                    "isActive": True,
+                    "createdAt": timestamp,
+                    "updatedAt": timestamp,
+                }
+            ],
+        )
+
 
 def upgrade() -> None:
     bind = op.get_bind()
@@ -26,6 +64,8 @@ def upgrade() -> None:
     for table in Base.metadata.sorted_tables:
         if table.name not in existing_tables:
             table.create(bind)
+    if "AdminDepartment" in Base.metadata.tables:
+        _seed_default_department(bind)
 
 
 def downgrade() -> None: