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/work_plans.py

@@ -8,6 +8,7 @@ from app.database import get_db
 from app.middleware.auth import get_current_user, require_any_role
 from app.utils.timezone import parse_date
 from app.utils.edit_log import compute_diff, append_entry, init_entry
+from app.utils.audit import log_audit
 from app.models.work_plan import WorkPlan
 from app.models.customer import Customer
 from app.models.user import User
@@ -54,17 +55,48 @@ async def create_work_plan(
     current_user: dict = Depends(require_any_role),
     db: AsyncSession = Depends(get_db),
 ):
+    plan_date = parse_date(data.plan_date)
+
+    # Auto-complete if a visit already exists for this customer on/after the plan date
+    from app.models.visit import Visit
+    if data.status == "计划中":
+        existing_visit = await db.execute(
+            select(Visit.id).where(
+                Visit.customer_id == data.customer_id,
+                Visit.visit_date >= plan_date,
+            ).limit(1)
+        )
+        if existing_visit.scalar_one_or_none():
+            data.status = "已完成"
+
     wp = WorkPlan(
         customer_id=data.customer_id,
         plan_content=data.plan_content,
-        plan_date=parse_date(data.plan_date),
+        plan_date=plan_date,
         manager_id=uuid.UUID(current_user["user_id"]),
         status=data.status,
     )
     init_entry(wp, current_user["name"])
+    if data.status == "已完成":
+        append_entry(wp, current_user["name"], [{"field": "status", "from": "计划中", "to": "已完成", "reason": "已有拜访记录，自动完成"}])
     db.add(wp)
     await db.commit()
     await db.refresh(wp)
+    # Audit log
+    cust = await db.execute(select(Customer.name).where(Customer.id == wp.customer_id))
+    await log_audit(db, "work_plan", wp.id, f"{cust.scalar_one_or_none() or ''} ({wp.plan_date})", "create", current_user["user_id"], current_user["name"])
+    await db.commit()
+    return await _enrich(wp, db)
+
+
+@router.get("/{plan_id}")
+async def get_work_plan(plan_id: str, db: AsyncSession = Depends(get_db), current_user: dict = Depends(get_current_user)):
+    result = await db.execute(select(WorkPlan).where(WorkPlan.id == plan_id))
+    wp = result.scalar_one_or_none()
+    if not wp:
+        raise HTTPException(status_code=404, detail="Not found")
+    if current_user["role"] == "manager" and str(wp.manager_id) != current_user["user_id"]:
+        raise HTTPException(status_code=403, detail="Access denied")
     return await _enrich(wp, db)
 
 
@@ -93,6 +125,10 @@ async def update_work_plan(
         append_entry(wp, current_user["name"], changes, getattr(data, "edit_reason", None))
     await db.commit()
     await db.refresh(wp)
+    # Audit log
+    cust = await db.execute(select(Customer.name).where(Customer.id == wp.customer_id))
+    await log_audit(db, "work_plan", wp.id, f"{cust.scalar_one_or_none() or ''} ({wp.plan_date})", "update", current_user["user_id"], current_user["name"])
+    await db.commit()
     return await _enrich(wp, db)
 
 
@@ -108,6 +144,11 @@ async def delete_work_plan(
         raise HTTPException(status_code=404, detail="Not found")
     if current_user["role"] == "manager" and str(wp.manager_id) != current_user["user_id"]:
         raise HTTPException(status_code=403, detail="Access denied")
+    cust = await db.execute(select(Customer.name).where(Customer.id == wp.customer_id))
+    entity_name = f"{cust.scalar_one_or_none() or ''} ({wp.plan_date})"
     await db.delete(wp)
     await db.commit()
+    # Audit log
+    await log_audit(db, "work_plan", uuid.UUID(plan_id), entity_name, "delete", current_user["user_id"], current_user["name"])
+    await db.commit()
     return {"detail": "deleted"}