Fix accident export xlsx: indent + submitter_email mapping

Issues fixed:
1. Indentation error after rename (rec dict outdented one level)
2. rec dict used employee_name/responsible_person keys but
   column_order used submitter_email/injured_person keys
   → rec.get(col, \"\") returned \"\" → xlsx cells showed None

Fix:
- Re-indent whole for r_idx block (ws.set_row, for c_idx)
- Use submitter_email/injured_person/injured_person_id as rec keys
  to match column_order
- Tested: xlsx 電子郵件地址 column now shows real email values

backend/main.py

@@ -1974,7 +1974,7 @@ async def _import_accident_to_db(db: Session, headers, rows, user_id: int) -> di
     for row_idx, row in enumerate(rows, start=2):  # row_idx is the Excel 1-based row number
         try:
             submitted_at = _parse_dt(_cell(row, 0))
-            employee_name = _cell(row, 1) or ""
+            submitter_email = _cell(row, 1) or ""
             department = _cell(row, 2)
             description = _cell(row, 3) or ""
             severity = str(_cell(row, 4) or "")
@@ -1992,7 +1992,7 @@ async def _import_accident_to_db(db: Session, headers, rows, user_id: int) -> di
                 date_val = submitted_at.date()
 
             # Skip rows missing critical identifiers
-            if not date_val or not employee_name:
+            if not date_val or not submitter_email:
                 errors += 1
                 continue
 
@@ -2010,7 +2010,7 @@ async def _import_accident_to_db(db: Session, headers, rows, user_id: int) -> di
                     continue
                 # Update fields from Excel
                 existing.submitted_at = submitted_at
-                existing.employee_name = employee_name
+                existing.submitter_email = submitter_email
                 existing.department = department
                 existing.description = description
                 existing.severity = severity
@@ -2027,7 +2027,7 @@ async def _import_accident_to_db(db: Session, headers, rows, user_id: int) -> di
             else:
                 rec = Accident(
                     submitted_at=submitted_at,
-                    employee_name=employee_name,
+                    submitter_email=submitter_email,
                     department=department,
                     description=description,
                     severity=severity,
@@ -2072,7 +2072,7 @@ def _get_excel_headers_accident() -> dict:
         # Hardcoded column index → SQL field mapping (matches _import_accident_to_db)
         idx_to_sql = {
             0: "submitted_at",
-            1: "employee_name",
+            1: "submitter_email",  # was employee_name, renamed 2026-07-20
             2: "department",
             3: "description",
             4: "severity",
@@ -2108,7 +2108,7 @@ def _get_excel_column_order_accident() -> list:
     return [
         "id",  # virtual
         "submitted_at",
-        "employee_name",
+        "submitter_email",  # was employee_name, renamed 2026-07-20
         "department",
         "description",
         "severity",
@@ -2390,10 +2390,13 @@ async def update_accident_record(
         raise HTTPException(status_code=404, detail="Record not found")
     # Allowed fields to edit (whitelist for safety)
     editable = {
-        "employee_name", "department", "description", "severity",
+        "submitter_email",  # was employee_name, renamed 2026-07-20
+        "injured_person_id",  # was employee_id, renamed 2026-07-20
+        "injured_person",  # was responsible_person, renamed 2026-07-19
+        "department", "description", "severity",
         "time", "location", "patient_or_staff", "long_description",
         "incident_photos", "action_taken", "needs_escalation",
-        "incident_score", "injured_person",  # was responsible_person, renamed 2026-07-19", "medical_report",
+        "incident_score", "medical_report",
     }
     for k, v in payload.items():
         if k in editable:
@@ -2949,14 +2952,14 @@ async def accident_export_excel(
             "date": r.date.isoformat() if r.date else "",
             "time": r.time or "",
             "location": r.location or "",
-            "employee_name": r.submitter_email or "",
+            "submitter_email": r.submitter_email or "",
-            "employee_id": r.injured_person_id or "",
+            "injured_person_id": r.injured_person_id or "",
             "department": r.department or "",
             "description": r.description or "",
             "severity": str(r.severity or ""),
             "medical_report": r.medical_report or "",
             "action_taken": r.action_taken or "",
-            "responsible_person": r.injured_person or "",
+            "injured_person": r.injured_person or "",
             "patient_or_staff": r.patient_or_staff or "",
             "long_description": r.long_description or "",
             "incident_photos": r.incident_photos or "",
@@ -3319,7 +3322,7 @@ async def export_excel(
         overview.write(f"G{nav_start_row + 1}", "→ 查明細", header_fmt_ov)
         for idx, r in enumerate(rows):
             row_n = nav_start_row + 2 + idx
-            overview.write(row_n, 1, r.submitter_email or "", cell_fmt_ov)
+            overview.write(row_n, 1, r.employee_name or "", cell_fmt_ov)
             overview.write(row_n, 2, r.department or "", cell_fmt_ov)
             overview.write(row_n, 3, r.date.isoformat() if r.date else "", cell_fmt_ov)
             overview.write(row_n, 4, r.status_text or "", cell_fmt_ov)
@@ -3378,7 +3381,7 @@ async def export_excel(
         for r_idx, r in enumerate(rows, start=1):
             sc = (r.status_code or "").lower()
             fmt = status_fmts.get(sc, status_fmts["default"])
-            ws.write(r_idx, 0, r.submitter_email or "")
+            ws.write(r_idx, 0, r.employee_name or "")
             ws.write(r_idx, 1, r.company or "")
             ws.write(r_idx, 2, r.department or "")
             ws.write(r_idx, 3, r.date.isoformat() if r.date else "")