feat: 导入增强 + 客户合并 + 同伴自定义 + 性能优化

=== 导入系统全面增强 ===
- 5 Sheet 完整导入：拜访/计划/商机/要客/纪要
- 同访人智能解析：中英文逗号/顿号/分号 → 系统用户UUID + 外部人员TEXT
- 客户自动创建：Excel中不存在的客户自动入库
- 模糊名称匹配：去空格 + 包含关系纠错
- manager_id 修正：导入时用客户分配的经理（非Excel列/非导入人）
- 模板更新：Sheet5「客户经理」→「填报人」，同访人示例含逗号分隔

=== 客户合并功能 ===
- PUT 改名碰撞检测 → 409 + 合并预览
- GET merge-preview / POST merge 端点
- 事务级迁移：Visit/WorkPlan/MiniBusiness/KeyVisit/联系人/分配
- 去重逻辑：联系人(name+phone)、分配(manager+role)
- last_visit_date 取最大值

=== 拜访记录完善 ===
- visits 新增 companion_names TEXT[] 列
- 同访人支持自定义输入（外部人员），el-select allow-create
- 移动端 VisitForm + PC端 ManagerWorkspace 统一
- 周报「客户经理」→「相关人员」（创建人+同访人）
- 纪要「客户经理」→「填报人」
- 删除拜访后重新计算 customer.last_visit_date

=== 客户选择放开 ===
- 客户经理可看到全部客户（不再限自己分配的）
- 拜访时客户下拉返回全量

=== 前端性能优化 ===
- Element Plus 按需加载 (unplugin-vue-components + unplugin-element-plus)
- 周报照片URL并行请求 (Promise.all)
- onMounted 三路并行 (loadReport + dropdowns + AI)
- nginx Cache-Control: immutable for /assets/
- Google Fonts preconnect hints
- 图片上传前 Canvas 压缩 (max 1920px, quality 0.8)

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

backend/app/services/excel_export.py

@@ -8,6 +8,7 @@ from app.models.visit import Visit
 from app.models.work_plan import WorkPlan
 from app.models.mini_business import MiniBusiness
 from app.models.key_visit import KeyVisit
+from app.models.daily_note import DailyNote
 from app.models.customer import Customer
 from app.models.user import User
 
@@ -21,7 +22,7 @@ def get_week_range(reference_date: date | None = None):
 
 
 async def export_weekly_report(db: AsyncSession, reference_date: date | None = None) -> io.BytesIO:
-    """Generate a 4-sheet xlsx matching the existing weekly report template."""
+    """Generate a 5-sheet xlsx matching the existing weekly report template."""
     monday, sunday = get_week_range(reference_date)
     wb = Workbook()
 
@@ -52,6 +53,7 @@ async def export_weekly_report(db: AsyncSession, reference_date: date | None = N
     )
     for v in visits_result.scalars():
         companions_names = [user_map.get(str(cid), str(cid)) for cid in (v.companions or [])]
+        companions_names.extend(v.companion_names or [])
         ws1.append([
             customer_map.get(str(v.customer_id), ""),
             str(v.visit_date),
@@ -127,8 +129,29 @@ async def export_weekly_report(db: AsyncSession, reference_date: date | None = N
             user_map.get(str(k.manager_id), ""),
         ])
 
+    # ── Sheet 5: 今日纪要 ──
+    ws5 = wb.create_sheet("今日纪要")
+    headers5 = ["日期", "分类", "内容", "时间范围", "填报人"]
+    ws5.append(headers5)
+    for col in range(1, len(headers5) + 1):
+        cell = ws5.cell(row=1, column=col)
+        cell.font = header_font
+        cell.border = thin_border
+
+    notes_result = await db.execute(
+        select(DailyNote).where(DailyNote.note_date >= monday, DailyNote.note_date <= sunday)
+    )
+    for n in notes_result.scalars():
+        ws5.append([
+            str(n.note_date),
+            n.category,
+            n.content,
+            n.time_range,
+            user_map.get(str(n.manager_id), ""),
+        ])
+
     # Adjust column widths
-    for ws in [ws1, ws2, ws3, ws4]:
+    for ws in [ws1, ws2, ws3, ws4, ws5]:
         for col_cells in ws.columns:
             max_length = max((len(str(cell.value or "")) for cell in col_cells), default=10)
             ws.column_dimensions[col_cells[0].column_letter].width = min(max_length + 4, 50)