feat: systematic functional audit — fix 18 issues across Phase A/B

Phase A (P1 production blockers):
- A1: Apply IP rate limiting to public routes (login/refresh)
- A2: Publish domain events for workflow instance state transitions
  (completed/suspended/resumed/terminated) via outbox pattern
- A3: Replace hardcoded nil UUID default tenant with dynamic DB lookup
- A4: Add GET /api/v1/audit-logs query endpoint with pagination
- A5: Enhance CORS wildcard warning for production environments

Phase B (P2 functional gaps):
- B1: Remove dead erp-common crate (zero references in codebase)
- B2: Refactor 5 settings pages to use typed API modules instead of
  direct client calls; create api/themes.ts; delete dead errors.ts
- B3: Add resume/suspend buttons to InstanceMonitor page
- B4: Remove unused EventHandler trait from erp-core
- B5: Handle task.completed events in message module (send notifications)
- B6: Wire TimeoutChecker as 60s background task
- B7: Auto-skip ServiceTask nodes instead of crashing the process
- B8: Remove empty register_routes() from ErpModule trait and modules

apps/web/src/api/dictionaries.ts

@@ -64,3 +64,44 @@ export async function listItemsByCode(code: string) {
   );
   return data.data;
 }
+
+export interface CreateDictionaryItemRequest {
+  label: string;
+  value: string;
+  sort_order?: number;
+  color?: string;
+}
+
+export interface UpdateDictionaryItemRequest {
+  label?: string;
+  value?: string;
+  sort_order?: number;
+  color?: string;
+}
+
+export async function createDictionaryItem(
+  dictionaryId: string,
+  req: CreateDictionaryItemRequest,
+) {
+  const { data } = await client.post<{ success: boolean; data: DictionaryItemInfo }>(
+    `/config/dictionaries/${dictionaryId}/items`,
+    req,
+  );
+  return data.data;
+}
+
+export async function updateDictionaryItem(
+  dictionaryId: string,
+  itemId: string,
+  req: UpdateDictionaryItemRequest,
+) {
+  const { data } = await client.put<{ success: boolean; data: DictionaryItemInfo }>(
+    `/config/dictionaries/${dictionaryId}/items/${itemId}`,
+    req,
+  );
+  return data.data;
+}
+
+export async function deleteDictionaryItem(dictionaryId: string, itemId: string) {
+  await client.delete(`/config/dictionaries/${dictionaryId}/items/${itemId}`);
+}