fix(db): resolve migration bugs preventing fresh database initialization

- Fix composite primary keys in role_permissions and user_roles tables
  (PostgreSQL does not allow multiple PRIMARY KEY constraints)
- Fix FK table name mismatch: tasks → tokens (was wf_tokens)
- Fix FK table name mismatch: messages → message_templates (was message_templates_ref)
- Fix tenant table name in main.rs SQL: tenant (not tenants)
- Fix React Router nested routes: add /* wildcard for child route matching

crates/erp-server/migration/src/m20260413_000024_create_messages.rs

@@ -93,7 +93,7 @@ impl MigrationTrait for Migration {
                 ForeignKey::create()
                     .name("fk_messages_template")
                     .from(Messages::Table, Messages::TemplateId)
-                    .to(MessageTemplatesRef::Table, MessageTemplatesRef::Id)
+                    .to(MessageTemplates::Table, MessageTemplates::Id)
                     .to_owned(),
             )
             .await?;
@@ -137,7 +137,7 @@ enum Messages {
 }
 
 #[derive(DeriveIden)]
-enum MessageTemplatesRef {
+enum MessageTemplates {
     Table,
     Id,
 }