feat(auth): add org/dept/position management, user page, and Phase 2 completion

Complete Phase 2 identity & authentication module:
- Organization CRUD with tree structure (parent_id + materialized path)
- Department CRUD nested under organizations with tree support
- Position CRUD nested under departments
- User management page with table, create/edit modal, role assignment
- Organization architecture page with 3-panel tree layout
- Frontend API layer for orgs/depts/positions
- Sidebar navigation updated with organization menu item
- Fix parse_ttl edge case for strings ending in 'd' (e.g. "invalid")

crates/erp-auth/src/module.rs

@@ -5,7 +5,7 @@ use erp_core::error::AppResult;
 use erp_core::events::EventBus;
 use erp_core::module::ErpModule;
 
-use crate::handler::{auth_handler, role_handler, user_handler};
+use crate::handler::{auth_handler, org_handler, role_handler, user_handler};
 
 /// Auth module implementing the `ErpModule` trait.
 ///
@@ -72,6 +72,39 @@ impl AuthModule {
                 "/permissions",
                 axum::routing::get(role_handler::list_permissions),
             )
+            // Organization routes
+            .route(
+                "/organizations",
+                axum::routing::get(org_handler::list_organizations)
+                    .post(org_handler::create_organization),
+            )
+            .route(
+                "/organizations/{id}",
+                axum::routing::put(org_handler::update_organization)
+                    .delete(org_handler::delete_organization),
+            )
+            // Department routes (nested under organization)
+            .route(
+                "/organizations/{org_id}/departments",
+                axum::routing::get(org_handler::list_departments)
+                    .post(org_handler::create_department),
+            )
+            .route(
+                "/departments/{id}",
+                axum::routing::put(org_handler::update_department)
+                    .delete(org_handler::delete_department),
+            )
+            // Position routes (nested under department)
+            .route(
+                "/departments/{dept_id}/positions",
+                axum::routing::get(org_handler::list_positions)
+                    .post(org_handler::create_position),
+            )
+            .route(
+                "/positions/{id}",
+                axum::routing::put(org_handler::update_position)
+                    .delete(org_handler::delete_position),
+            )
     }
 }