fix(auth): standardize permission codes to dot notation and add missing permissions

- Change all permission codes from colon (`:`) to dot (`.`) separator
  to match handler require_permission() calls consistently
- Add missing user.list, role.list, permission.list, organization.list,
  department.list, position.list permissions (handlers check for .list
  but seeds only had :read)
- Add missing message module permissions (message.list, message.send,
  message.template.list, message.template.create)
- Add missing setting.delete, numbering.delete permissions
- Fix workflow handlers: workflow: → workflow.
- Fix message handlers: message: → message.
- Update viewer role READ_PERM_INDICES for new permission list

This fixes a critical runtime bug where ALL permission checks in
erp-auth and erp-config handlers would return 403 Forbidden because
the seed data used colon separators but handlers checked for dots.

crates/erp-workflow/src/handler/task_handler.rs

@@ -22,7 +22,7 @@ where
     WorkflowState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
 {
-    require_permission(&ctx, "workflow:approve")?;
+    require_permission(&ctx, "workflow.approve")?;
 
     let (tasks, total) =
         TaskService::list_pending(ctx.tenant_id, ctx.user_id, &pagination, &state.db).await?;
@@ -50,7 +50,7 @@ where
     WorkflowState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
 {
-    require_permission(&ctx, "workflow:approve")?;
+    require_permission(&ctx, "workflow.approve")?;
 
     let (tasks, total) =
         TaskService::list_completed(ctx.tenant_id, ctx.user_id, &pagination, &state.db).await?;
@@ -79,7 +79,7 @@ where
     WorkflowState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
 {
-    require_permission(&ctx, "workflow:approve")?;
+    require_permission(&ctx, "workflow.approve")?;
     req.validate().map_err(|e| AppError::Validation(e.to_string()))?;
 
     let resp = TaskService::complete(
@@ -106,7 +106,7 @@ where
     WorkflowState: FromRef<S>,
     S: Clone + Send + Sync + 'static,
 {
-    require_permission(&ctx, "workflow:delegate")?;
+    require_permission(&ctx, "workflow.delegate")?;
     req.validate().map_err(|e| AppError::Validation(e.to_string()))?;
 
     let resp =