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/0016_concierge_advisors.py

@@ -5,11 +5,14 @@ Revises: 0015_wanfa
 """
 
 from datetime import datetime
+import json
 
 from alembic import context, op
 import sqlalchemy as sa
 from sqlalchemy import inspect
 
+from app.migration_compat import baseline_table_names
+
 
 revision = "0016_concierge_advisors"
 down_revision = "0015_wanfa"
@@ -60,14 +63,23 @@ SEED_ADVISORS = (
 )
 
 
+def is_offline_mode() -> bool:
+    try:
+        return context.is_offline_mode()
+    except (NameError, AttributeError):
+        return False
+
+
 def _seed_advisors() -> None:
+    offline = is_offline_mode()
+    details_type = sa.Text() if offline else sa.JSON()
     table = sa.table(
         "ConciergeAdvisor",
         sa.column("id", sa.String()),
         sa.column("avatar", sa.String()),
         sa.column("name", sa.String()),
         sa.column("role", sa.String()),
-        sa.column("details", sa.JSON()),
+        sa.column("details", details_type),
         sa.column("qrImage", sa.String()),
         sa.column("isActive", sa.Boolean()),
         sa.column("sortOrder", sa.Integer()),
@@ -75,15 +87,18 @@ def _seed_advisors() -> None:
         sa.column("updatedAt", sa.DateTime()),
     )
     timestamp = datetime(2026, 1, 1)
-    op.bulk_insert(
-        table,
-        [{**advisor, "createdAt": timestamp, "updatedAt": timestamp} for advisor in SEED_ADVISORS],
-    )
+    rows = [{**advisor, "createdAt": timestamp, "updatedAt": timestamp} for advisor in SEED_ADVISORS]
+    if offline:
+        rows = [{**advisor, "details": json.dumps(advisor["details"], ensure_ascii=False)} for advisor in rows]
+    op.bulk_insert(table, rows)
 
 
 def upgrade() -> None:
-    bind = op.get_bind()
-    existing_tables = set(inspect(bind).get_table_names())
+    if is_offline_mode():
+        existing_tables = baseline_table_names()
+    else:
+        bind = op.get_bind()
+        existing_tables = set(inspect(bind).get_table_names())
     if "ConciergeAdvisor" not in existing_tables:
         op.create_table(
             "ConciergeAdvisor",
@@ -102,7 +117,7 @@ def upgrade() -> None:
         op.create_index("ix_ConciergeAdvisor_isActive", "ConciergeAdvisor", ["isActive"])
         op.create_index("ix_ConciergeAdvisor_sortOrder", "ConciergeAdvisor", ["sortOrder"])
 
-    if context.is_offline_mode():
+    if is_offline_mode():
         _seed_advisors()
         return