feat: 操作日志系统 + 日期修复 + 协同去重 + 主题持久化 + 计划自动完成

本次累积提交包含以下功能：

1. 修复：el-date-picker 缺失 value-format 导致日期保存偏移（8处）
2. 新增：协同拜访 visit_group_id 去重机制（完整副本 + 周报合并 + 亮灯去重）
3. 新增：计划自动完成（创建计划检测已有拜访 / 编辑拜访触发）
4. 新增：拜访表单选择客户后自动预填过期计划内容
5. 新增：移动端主题切换按钮 + 后端持久化
6. 新增：操作日志系统 (audit_logs)，全覆盖 8 个模块 CRUD
7. 新增：PC端「我的数据」支局长/领导视角客户经理列

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

backend/app/api/visits.py

@@ -14,6 +14,7 @@ from app.utils.timezone import today_cst, parse_date
 from app.services.minio_client import delete_objects
 from app.api.upload import is_owned_upload_key
 from app.utils.edit_log import compute_diff, append_entry, init_entry
+from app.utils.audit import log_audit
 
 router = APIRouter(prefix="/visits", tags=["Visits"])
 
@@ -61,6 +62,7 @@ async def _enrich_visit(visit: Visit, db: AsyncSession) -> dict:
         "photos": visit.photos,
         "manager_id": str(visit.manager_id),
         "manager_name": manager_name,
+        "visit_group_id": str(visit.visit_group_id) if visit.visit_group_id else None,
         "edit_log": visit.edit_log or [],
         "created_at": str(visit.created_at),
         "updated_at": str(visit.updated_at),
@@ -146,8 +148,9 @@ async def create_visit(
     current_user: dict = Depends(require_any_role),
     db: AsyncSession = Depends(get_db),
 ):
-    """Create a visit record. If companions are selected, creates draft copies for them."""
+    """Create a visit record. If companions are selected, creates full copies for them."""
     _validate_photo_keys(data.photos, current_user["user_id"])
+    group_id = uuid.uuid4()
     visit = Visit(
         customer_id=data.customer_id,
         visit_date=parse_date(data.visit_date),
@@ -159,6 +162,7 @@ async def create_visit(
         companion_names=data.companion_names,
         photos=data.photos,
         manager_id=uuid.UUID(current_user["user_id"]),
+        visit_group_id=group_id,
     )
     init_entry(visit, current_user["name"])
     db.add(visit)
@@ -184,22 +188,36 @@ async def create_visit(
         plan.status = "已完成"
         append_entry(plan, current_user["name"], [{"field": "status", "from": "计划中", "to": "已完成", "reason": "拜访自动完成"}])
 
-    # Create draft copies for companions
+    # Create full copies for companions (not blank drafts)
+    creator_name = current_user["name"]
     for companion_id in data.companions:
         if companion_id != uuid.UUID(current_user["user_id"]):
+            # Build companion's companions list: the creator + other companions excluding self
+            comp_companions = [uuid.UUID(current_user["user_id"])]
+            for cid in data.companions:
+                if cid != companion_id and cid not in comp_companions:
+                    comp_companions.append(cid)
             draft = Visit(
                 customer_id=data.customer_id,
                 visit_date=parse_date(data.visit_date),
                 visit_method=data.visit_method,
                 time_range=data.time_range,
-                communication_content="",  # Leave blank for companion to fill
-                customer_demand="",
-                companions=[],
-                photos=[],
+                visitor_name=data.visitor_name,
+                visitor_phone=data.visitor_phone,
+                communication_content=(data.communication_content or "") + f"（协同{creator_name}）",
+                customer_demand=data.customer_demand,
+                companions=comp_companions,
+                companion_names=[],
+                photos=data.photos,
                 manager_id=companion_id,
+                visit_group_id=group_id,
             )
+            init_entry(draft, current_user["name"])
             db.add(draft)
 
+    # Audit log (before commit — part of same transaction)
+    cust = await db.execute(select(Customer.name).where(Customer.id == visit.customer_id))
+    await log_audit(db, "visit", visit.id, f"{cust.scalar_one_or_none() or ''} ({data.visit_date})", "create", current_user["user_id"], current_user["name"])
     await db.commit()
     await db.refresh(visit)
     return await _enrich_visit(visit, db)
@@ -249,6 +267,22 @@ async def update_visit(
     if changes:
         append_entry(visit, current_user["name"], changes, getattr(data, "edit_reason", None))
 
+    # Auto-complete matching work plans when visit date or customer changes
+    from app.models.work_plan import WorkPlan
+    plans_result = await db.execute(
+        select(WorkPlan).where(
+            WorkPlan.customer_id == visit.customer_id,
+            WorkPlan.status == "计划中",
+            WorkPlan.plan_date <= visit.visit_date,
+        )
+    )
+    for plan in plans_result.scalars().all():
+        plan.status = "已完成"
+        append_entry(plan, current_user["name"], [{"field": "status", "from": "计划中", "to": "已完成", "reason": "拜访更新自动完成"}])
+
+    # Audit log (before commit — part of same transaction)
+    cust = await db.execute(select(Customer.name).where(Customer.id == visit.customer_id))
+    await log_audit(db, "visit", visit.id, f"{cust.scalar_one_or_none() or ''} ({visit.visit_date})", "update", current_user["user_id"], current_user["name"], ", ".join([c["field"] for c in changes]) if changes else "")
     await db.commit()
     await db.refresh(visit)
     return await _enrich_visit(visit, db)
@@ -275,6 +309,10 @@ async def delete_visit(
     if visit.photos:
         delete_objects(visit.photos)
 
+    # Snapshot entity name before deletion
+    cust_name_result = await db.execute(select(Customer.name).where(Customer.id == customer_id))
+    entity_name = f"{cust_name_result.scalar_one_or_none() or ''} ({visit.visit_date})"
+
     await db.delete(visit)
 
     # Recalculate customer's last_visit_date from remaining visits
@@ -288,7 +326,6 @@ async def delete_visit(
     if cust:
         if new_latest:
             cust.last_visit_date = new_latest
-            # Keep the existing manager if date unchanged, or find who made the latest visit
             latest_visit = await db.execute(
                 select(Visit).where(
                     Visit.customer_id == customer_id,
@@ -302,5 +339,7 @@ async def delete_visit(
             cust.last_visit_date = None
             cust.last_visit_manager_id = None
 
+    # Audit log (before final commit — part of same transaction)
+    await log_audit(db, "visit", uuid.UUID(visit_id), entity_name, "delete", current_user["user_id"], current_user["name"])
     await db.commit()
     return {"detail": "deleted"}