feat(clients): maker-checker for client edits (frontend)

- New "Pending Client Edits" screen under Checker Inbox & Tasks: server-driven pagination,
  date range + Today/Yesterday/All presets, status filter (Pending/Approved/Rejected), search —
  mirrors ChequebookRequestsComponent's architecture.
- Compare dialog diffs the maker's proposed values against a point-in-time "before" snapshot
  (client-edit-diff.util.ts) captured when the edit page was opened, so only genuinely changed
  fields show — works correctly for Pending, Approved, and Rejected edits alike, since it no
  longer depends on comparing against the live (possibly already-updated) client record.
- edit-client.component.ts: General tab save now submits for approval instead of applying
  immediately, shows a pending-approval banner, and blocks a second submission while one's
  outstanding.
- error-handler.interceptor.ts: added the new /clients/{id}/edit/pending check to the existing
  "expected 403/404, don't alert" allowlist (same pattern already used for client images/KYC).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/tasks/tasks-routing.module.ts

@@ -30,6 +30,7 @@ import { PendingSavingsProductsComponent } from './checker-inbox-and-tasks-tabs/
 import { ChequebookRequestsComponent } from './checker-inbox-and-tasks-tabs/chequebook-requests/chequebook-requests.component';
 import { PendingSavingsAccountEditsComponent } from './checker-inbox-and-tasks-tabs/pending-savings-account-edits/pending-savings-account-edits.component';
 import { PendingShareAccountEditsComponent } from './checker-inbox-and-tasks-tabs/pending-share-account-edits/pending-share-account-edits.component';
+import { PendingClientEditsComponent } from './checker-inbox-and-tasks-tabs/pending-client-edits/pending-client-edits.component';
 import { ViewCheckerInboxComponent } from './view-checker-inbox/view-checker-inbox.component';
 
 /** Custom Resolvers */
@@ -152,6 +153,11 @@ const routes: Routes = [
             pendingShareAccountEditsData: GetPendingShareAccountEdits
           }
         },
+        {
+          path: 'pending-client-edits',
+          component: PendingClientEditsComponent,
+          data: { title: 'Pending Client Edits' }
+        },
         {
           path: 'withdrawal-requests',
           component: WithdrawalRequestsComponent,