feat(audit): show actor full name + role in logs, click to view details

Logs showed the raw User ID (ActorName was almost never stored) and an English
role enum. Now:

- AuditController resolves each entry's actor to the employee's CURRENT full name
  and localized role at read time (joins Employees with IgnoreQueryFilters, so it
  also names soft-deleted staff and fixes all historical rows — no migration).
- The audit table renders "Full name (Role)" with the role localized (fa/en/ar);
  the name is a button that opens an employee-details dialog.
- New EmployeeDetailsDialog: fetches the employee and shows name, role, phone,
  base salary, and an "Open in HR" link; handles removed staff gracefully.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/dashboard/messages/en.json

@@ -1,6 +1,7 @@
 {
   "common": {
     "save": "Save",
+    "close": "Close",
     "cancel": "Cancel",
     "confirm": "Confirm",
     "delete": "Delete",
@@ -481,6 +482,9 @@
     "addEmployee": "Add employee",
     "noEmployees": "No employees yet.",
     "employeeCreated": "Employee added",
+    "employeeDetails": "Employee details",
+    "employeeNotFound": "This user is no longer active.",
+    "openInHr": "Open in HR",
     "save": "Save",
     "cancel": "Cancel",
     "fields": {
@@ -667,6 +671,7 @@
       "colSummary": "Summary",
       "details": "Details",
       "systemActor": "System",
+      "unknownActor": "Unknown user",
       "prevPage": "Previous",
       "nextPage": "Next"
     }